./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 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/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-?-6c24879 [2022-07-12 10:40:51,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:40:51,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:40:51,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:40:51,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:40:51,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:40:51,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:40:51,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:40:51,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:40:51,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:40:51,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:40:51,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:40:51,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:40:52,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:40:52,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:40:52,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:40:52,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:40:52,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:40:52,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:40:52,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:40:52,012 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:40:52,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:40:52,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:40:52,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:40:52,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:40:52,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:40:52,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:40:52,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:40:52,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:40:52,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:40:52,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:40:52,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:40:52,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:40:52,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:40:52,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:40:52,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:40:52,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:40:52,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:40:52,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:40:52,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:40:52,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:40:52,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:40:52,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:40:52,074 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:40:52,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:40:52,074 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:40:52,074 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:40:52,075 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:40:52,075 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:40:52,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:40:52,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:40:52,076 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:40:52,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:40:52,077 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:40:52,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:40:52,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:40:52,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:40:52,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:40:52,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:40:52,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:40:52,078 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:40:52,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:40:52,078 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:40:52,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:40:52,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:40:52,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:40:52,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:40:52,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:40:52,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:40:52,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:40:52,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:40:52,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:40:52,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:40:52,092 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:40:52,092 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:40:52,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:40:52,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 [2022-07-12 10:40:52,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:40:52,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:40:52,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:40:52,382 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:40:52,383 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:40:52,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-07-12 10:40:52,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b66236f7/2cc8db9f73fc44839d0fd501f26af8e2/FLAG7425d5ca6 [2022-07-12 10:40:52,780 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:40:52,780 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-07-12 10:40:52,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b66236f7/2cc8db9f73fc44839d0fd501f26af8e2/FLAG7425d5ca6 [2022-07-12 10:40:52,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b66236f7/2cc8db9f73fc44839d0fd501f26af8e2 [2022-07-12 10:40:52,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:40:52,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:40:52,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:40:52,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:40:52,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:40:52,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:40:52" (1/1) ... [2022-07-12 10:40:52,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c596d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:52, skipping insertion in model container [2022-07-12 10:40:52,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:40:52" (1/1) ... [2022-07-12 10:40:52,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:40:52,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:40:52,926 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] [2022-07-12 10:40:52,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:40:52,934 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:40:52,947 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] [2022-07-12 10:40:52,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:40:52,959 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:40:52,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:52 WrapperNode [2022-07-12 10:40:52,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:40:52,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:40:52,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:40:52,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:40:52,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:52" (1/1) ... [2022-07-12 10:40:52,972 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:52" (1/1) ... [2022-07-12 10:40:52,987 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2022-07-12 10:40:52,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:40:52,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:40:52,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:40:52,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:40:52,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:52" (1/1) ... [2022-07-12 10:40:52,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:52" (1/1) ... [2022-07-12 10:40:53,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:52" (1/1) ... [2022-07-12 10:40:53,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:52" (1/1) ... [2022-07-12 10:40:53,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:52" (1/1) ... [2022-07-12 10:40:53,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:52" (1/1) ... [2022-07-12 10:40:53,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:52" (1/1) ... [2022-07-12 10:40:53,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:40:53,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:40:53,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:40:53,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:40:53,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:52" (1/1) ... [2022-07-12 10:40:53,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:40:53,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:53,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:40:53,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:40:53,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:40:53,105 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:40:53,105 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:40:53,105 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:40:53,110 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:40:53,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:40:53,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:40:53,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:40:53,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:40:53,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:40:53,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:40:53,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:40:53,112 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:40:53,188 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:40:53,189 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:40:53,363 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:40:53,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:40:53,368 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 10:40:53,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:40:53 BoogieIcfgContainer [2022-07-12 10:40:53,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:40:53,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:40:53,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:40:53,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:40:53,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:40:52" (1/3) ... [2022-07-12 10:40:53,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f255b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:40:53, skipping insertion in model container [2022-07-12 10:40:53,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:52" (2/3) ... [2022-07-12 10:40:53,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f255b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:40:53, skipping insertion in model container [2022-07-12 10:40:53,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:40:53" (3/3) ... [2022-07-12 10:40:53,391 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2022-07-12 10:40:53,395 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:40:53,401 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:40:53,401 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:40:53,401 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:40:53,457 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:40:53,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-07-12 10:40:53,595 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-12 10:40:53,595 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:40:53,611 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. [2022-07-12 10:40:53,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-07-12 10:40:53,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-07-12 10:40:53,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:40:53,645 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@2fc014ca, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@51410088 [2022-07-12 10:40:53,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:40:53,702 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2022-07-12 10:40:53,703 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:40:53,703 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:53,705 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] [2022-07-12 10:40:53,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:53,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:53,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1829802854, now seen corresponding path program 1 times [2022-07-12 10:40:53,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:53,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739902029] [2022-07-12 10:40:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:53,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:53,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:53,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739902029] [2022-07-12 10:40:53,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739902029] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:40:53,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:40:53,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:40:53,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702868814] [2022-07-12 10:40:53,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:53,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:40:53,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:40:53,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:40:53,894 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 84 [2022-07-12 10:40:53,896 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) [2022-07-12 10:40:53,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:53,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 84 [2022-07-12 10:40:53,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:53,935 INFO L129 PetriNetUnfolder]: 2/69 cut-off events. [2022-07-12 10:40:53,935 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:40:53,936 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. [2022-07-12 10:40:53,937 INFO L132 encePairwiseOnDemand]: 80/84 looper letters, 4 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-07-12 10:40:53,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 158 flow [2022-07-12 10:40:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:40:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:40:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2022-07-12 10:40:53,949 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9404761904761905 [2022-07-12 10:40:53,949 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2022-07-12 10:40:53,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2022-07-12 10:40:53,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:53,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2022-07-12 10:40:53,958 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) [2022-07-12 10:40:53,961 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) [2022-07-12 10:40:53,961 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) [2022-07-12 10:40:53,963 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 158 transitions. [2022-07-12 10:40:53,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 158 flow [2022-07-12 10:40:53,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:40:53,967 INFO L242 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-07-12 10:40:53,969 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} [2022-07-12 10:40:53,971 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-07-12 10:40:53,972 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-07-12 10:40:53,972 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) [2022-07-12 10:40:53,972 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:53,973 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] [2022-07-12 10:40:53,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:40:53,973 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:53,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash 845260518, now seen corresponding path program 1 times [2022-07-12 10:40:53,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:53,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594039536] [2022-07-12 10:40:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:53,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:54,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:54,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594039536] [2022-07-12 10:40:54,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594039536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:40:54,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:40:54,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:40:54,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23162142] [2022-07-12 10:40:54,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:54,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:40:54,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:54,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:40:54,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:40:54,167 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-07-12 10:40:54,168 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) [2022-07-12 10:40:54,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:54,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-07-12 10:40:54,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:54,315 INFO L129 PetriNetUnfolder]: 62/212 cut-off events. [2022-07-12 10:40:54,316 INFO L130 PetriNetUnfolder]: For 11/23 co-relation queries the response was YES. [2022-07-12 10:40:54,317 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. [2022-07-12 10:40:54,318 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-07-12 10:40:54,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 245 flow [2022-07-12 10:40:54,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:40:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:40:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 410 transitions. [2022-07-12 10:40:54,323 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6972789115646258 [2022-07-12 10:40:54,323 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 410 transitions. [2022-07-12 10:40:54,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 410 transitions. [2022-07-12 10:40:54,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:54,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 410 transitions. [2022-07-12 10:40:54,326 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) [2022-07-12 10:40:54,330 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) [2022-07-12 10:40:54,331 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) [2022-07-12 10:40:54,331 INFO L186 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 7 states and 410 transitions. [2022-07-12 10:40:54,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 245 flow [2022-07-12 10:40:54,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:40:54,334 INFO L242 Difference]: Finished difference. Result has 78 places, 69 transitions, 165 flow [2022-07-12 10:40:54,341 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} [2022-07-12 10:40:54,342 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-07-12 10:40:54,343 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 165 flow [2022-07-12 10:40:54,343 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) [2022-07-12 10:40:54,343 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:54,343 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] [2022-07-12 10:40:54,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:40:54,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:54,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1873293087, now seen corresponding path program 1 times [2022-07-12 10:40:54,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:54,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637944201] [2022-07-12 10:40:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:54,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:54,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:54,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637944201] [2022-07-12 10:40:54,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637944201] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:54,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61532077] [2022-07-12 10:40:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:54,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:54,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:54,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:40:54,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:40:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:54,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:40:54,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:54,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:54,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61532077] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:54,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:40:54,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-07-12 10:40:55,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552847652] [2022-07-12 10:40:55,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:55,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:40:55,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:55,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:40:55,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:40:55,002 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-07-12 10:40:55,002 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) [2022-07-12 10:40:55,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:55,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-07-12 10:40:55,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:55,079 INFO L129 PetriNetUnfolder]: 62/253 cut-off events. [2022-07-12 10:40:55,079 INFO L130 PetriNetUnfolder]: For 25/32 co-relation queries the response was YES. [2022-07-12 10:40:55,080 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. [2022-07-12 10:40:55,081 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 37 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2022-07-12 10:40:55,081 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 324 flow [2022-07-12 10:40:55,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:40:55,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:40:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2022-07-12 10:40:55,083 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7242063492063492 [2022-07-12 10:40:55,083 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 365 transitions. [2022-07-12 10:40:55,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 365 transitions. [2022-07-12 10:40:55,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:55,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 365 transitions. [2022-07-12 10:40:55,085 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) [2022-07-12 10:40:55,086 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) [2022-07-12 10:40:55,086 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) [2022-07-12 10:40:55,086 INFO L186 Difference]: Start difference. First operand has 78 places, 69 transitions, 165 flow. Second operand 6 states and 365 transitions. [2022-07-12 10:40:55,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 324 flow [2022-07-12 10:40:55,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 305 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-12 10:40:55,089 INFO L242 Difference]: Finished difference. Result has 79 places, 73 transitions, 210 flow [2022-07-12 10:40:55,089 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} [2022-07-12 10:40:55,089 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2022-07-12 10:40:55,090 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 210 flow [2022-07-12 10:40:55,090 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) [2022-07-12 10:40:55,090 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:55,090 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] [2022-07-12 10:40:55,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 10:40:55,304 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 [2022-07-12 10:40:55,305 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:55,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:55,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1876192723, now seen corresponding path program 2 times [2022-07-12 10:40:55,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:55,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287917070] [2022-07-12 10:40:55,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:55,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:55,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:55,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287917070] [2022-07-12 10:40:55,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287917070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:40:55,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:40:55,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:40:55,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359414289] [2022-07-12 10:40:55,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:55,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:40:55,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:40:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:40:55,403 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-07-12 10:40:55,404 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) [2022-07-12 10:40:55,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:55,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-07-12 10:40:55,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:55,473 INFO L129 PetriNetUnfolder]: 55/228 cut-off events. [2022-07-12 10:40:55,473 INFO L130 PetriNetUnfolder]: For 141/155 co-relation queries the response was YES. [2022-07-12 10:40:55,474 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. [2022-07-12 10:40:55,475 INFO L132 encePairwiseOnDemand]: 75/84 looper letters, 33 selfloop transitions, 7 changer transitions 5/88 dead transitions. [2022-07-12 10:40:55,475 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 356 flow [2022-07-12 10:40:55,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:40:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:40:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2022-07-12 10:40:55,477 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-07-12 10:40:55,478 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2022-07-12 10:40:55,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2022-07-12 10:40:55,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:55,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2022-07-12 10:40:55,479 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) [2022-07-12 10:40:55,479 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) [2022-07-12 10:40:55,480 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) [2022-07-12 10:40:55,480 INFO L186 Difference]: Start difference. First operand has 79 places, 73 transitions, 210 flow. Second operand 6 states and 360 transitions. [2022-07-12 10:40:55,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 356 flow [2022-07-12 10:40:55,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:40:55,482 INFO L242 Difference]: Finished difference. Result has 84 places, 75 transitions, 246 flow [2022-07-12 10:40:55,482 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} [2022-07-12 10:40:55,483 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2022-07-12 10:40:55,483 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 246 flow [2022-07-12 10:40:55,483 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) [2022-07-12 10:40:55,483 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:55,484 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] [2022-07-12 10:40:55,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:40:55,484 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:55,484 INFO L85 PathProgramCache]: Analyzing trace with hash 849329763, now seen corresponding path program 1 times [2022-07-12 10:40:55,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:55,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767832991] [2022-07-12 10:40:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:55,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:55,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:55,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767832991] [2022-07-12 10:40:55,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767832991] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:40:55,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:40:55,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:40:55,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623523656] [2022-07-12 10:40:55,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:55,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:40:55,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:55,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:40:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:40:55,555 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-07-12 10:40:55,555 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) [2022-07-12 10:40:55,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:55,555 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-07-12 10:40:55,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:55,627 INFO L129 PetriNetUnfolder]: 50/221 cut-off events. [2022-07-12 10:40:55,627 INFO L130 PetriNetUnfolder]: For 204/208 co-relation queries the response was YES. [2022-07-12 10:40:55,628 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. [2022-07-12 10:40:55,629 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 33 selfloop transitions, 11 changer transitions 4/91 dead transitions. [2022-07-12 10:40:55,629 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 402 flow [2022-07-12 10:40:55,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:40:55,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:40:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 417 transitions. [2022-07-12 10:40:55,631 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7091836734693877 [2022-07-12 10:40:55,631 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 417 transitions. [2022-07-12 10:40:55,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 417 transitions. [2022-07-12 10:40:55,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:55,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 417 transitions. [2022-07-12 10:40:55,632 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) [2022-07-12 10:40:55,633 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) [2022-07-12 10:40:55,633 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) [2022-07-12 10:40:55,633 INFO L186 Difference]: Start difference. First operand has 84 places, 75 transitions, 246 flow. Second operand 7 states and 417 transitions. [2022-07-12 10:40:55,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 402 flow [2022-07-12 10:40:55,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 91 transitions, 390 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-07-12 10:40:55,637 INFO L242 Difference]: Finished difference. Result has 89 places, 75 transitions, 273 flow [2022-07-12 10:40:55,638 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} [2022-07-12 10:40:55,640 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2022-07-12 10:40:55,640 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 273 flow [2022-07-12 10:40:55,640 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) [2022-07-12 10:40:55,640 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:55,640 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:55,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:40:55,641 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:55,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1240332628, now seen corresponding path program 1 times [2022-07-12 10:40:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:55,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630172781] [2022-07-12 10:40:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:55,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:55,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:55,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630172781] [2022-07-12 10:40:55,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630172781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:55,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994850552] [2022-07-12 10:40:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:55,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:55,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:55,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:40:55,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:40:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:55,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 10:40:55,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:56,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:56,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994850552] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:56,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:56,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-07-12 10:40:56,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868656524] [2022-07-12 10:40:56,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:56,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 10:40:56,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:56,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 10:40:56,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-07-12 10:40:56,316 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:40:56,317 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) [2022-07-12 10:40:56,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:56,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:40:56,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:57,948 INFO L129 PetriNetUnfolder]: 201/618 cut-off events. [2022-07-12 10:40:57,949 INFO L130 PetriNetUnfolder]: For 892/892 co-relation queries the response was YES. [2022-07-12 10:40:57,950 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. [2022-07-12 10:40:57,953 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 105 selfloop transitions, 136 changer transitions 4/286 dead transitions. [2022-07-12 10:40:57,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 286 transitions, 1774 flow [2022-07-12 10:40:57,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-12 10:40:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-12 10:40:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3453 transitions. [2022-07-12 10:40:57,960 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6524943310657596 [2022-07-12 10:40:57,960 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3453 transitions. [2022-07-12 10:40:57,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3453 transitions. [2022-07-12 10:40:57,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:57,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3453 transitions. [2022-07-12 10:40:57,967 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) [2022-07-12 10:40:58,002 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) [2022-07-12 10:40:58,003 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) [2022-07-12 10:40:58,003 INFO L186 Difference]: Start difference. First operand has 89 places, 75 transitions, 273 flow. Second operand 63 states and 3453 transitions. [2022-07-12 10:40:58,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 286 transitions, 1774 flow [2022-07-12 10:40:58,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 286 transitions, 1745 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-07-12 10:40:58,009 INFO L242 Difference]: Finished difference. Result has 165 places, 217 transitions, 1436 flow [2022-07-12 10:40:58,010 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} [2022-07-12 10:40:58,010 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 91 predicate places. [2022-07-12 10:40:58,010 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 217 transitions, 1436 flow [2022-07-12 10:40:58,011 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) [2022-07-12 10:40:58,011 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:58,011 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:58,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:40:58,224 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 [2022-07-12 10:40:58,224 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:58,225 INFO L85 PathProgramCache]: Analyzing trace with hash -517489446, now seen corresponding path program 2 times [2022-07-12 10:40:58,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:58,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014940014] [2022-07-12 10:40:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:58,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:58,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:58,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014940014] [2022-07-12 10:40:58,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014940014] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:58,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605102380] [2022-07-12 10:40:58,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:40:58,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:58,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:58,346 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:40:58,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:40:58,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:40:58,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:40:58,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 10:40:58,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:58,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:58,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:58,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605102380] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:58,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:58,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-07-12 10:40:58,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677991448] [2022-07-12 10:40:58,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:58,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:40:58,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:58,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:40:58,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:40:58,708 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:40:58,709 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) [2022-07-12 10:40:58,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:58,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:40:58,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:59,070 INFO L129 PetriNetUnfolder]: 225/682 cut-off events. [2022-07-12 10:40:59,070 INFO L130 PetriNetUnfolder]: For 3193/3193 co-relation queries the response was YES. [2022-07-12 10:40:59,073 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. [2022-07-12 10:40:59,076 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 80 selfloop transitions, 170 changer transitions 15/306 dead transitions. [2022-07-12 10:40:59,076 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 306 transitions, 2719 flow [2022-07-12 10:40:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 10:40:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-12 10:40:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1093 transitions. [2022-07-12 10:40:59,078 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6505952380952381 [2022-07-12 10:40:59,078 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1093 transitions. [2022-07-12 10:40:59,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1093 transitions. [2022-07-12 10:40:59,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:59,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1093 transitions. [2022-07-12 10:40:59,081 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) [2022-07-12 10:40:59,083 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) [2022-07-12 10:40:59,083 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) [2022-07-12 10:40:59,083 INFO L186 Difference]: Start difference. First operand has 165 places, 217 transitions, 1436 flow. Second operand 20 states and 1093 transitions. [2022-07-12 10:40:59,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 306 transitions, 2719 flow [2022-07-12 10:40:59,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 306 transitions, 2517 flow, removed 88 selfloop flow, removed 7 redundant places. [2022-07-12 10:40:59,105 INFO L242 Difference]: Finished difference. Result has 182 places, 270 transitions, 2130 flow [2022-07-12 10:40:59,106 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} [2022-07-12 10:40:59,106 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 108 predicate places. [2022-07-12 10:40:59,106 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 270 transitions, 2130 flow [2022-07-12 10:40:59,107 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) [2022-07-12 10:40:59,107 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:59,107 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:59,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:40:59,323 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 [2022-07-12 10:40:59,323 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:59,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:59,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1446740796, now seen corresponding path program 3 times [2022-07-12 10:40:59,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:59,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785332968] [2022-07-12 10:40:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:59,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:59,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:59,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785332968] [2022-07-12 10:40:59,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785332968] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:59,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893737407] [2022-07-12 10:40:59,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:40:59,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:59,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:59,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:40:59,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:40:59,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:40:59,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:40:59,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 10:40:59,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:59,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:59,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893737407] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:59,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:59,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-07-12 10:40:59,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064560583] [2022-07-12 10:40:59,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:59,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 10:40:59,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:59,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 10:40:59,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-07-12 10:40:59,823 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:40:59,824 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) [2022-07-12 10:40:59,824 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:59,824 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:40:59,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:00,918 INFO L129 PetriNetUnfolder]: 361/1083 cut-off events. [2022-07-12 10:41:00,918 INFO L130 PetriNetUnfolder]: For 6545/6545 co-relation queries the response was YES. [2022-07-12 10:41:00,922 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. [2022-07-12 10:41:00,926 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 170 selfloop transitions, 270 changer transitions 79/560 dead transitions. [2022-07-12 10:41:00,926 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 560 transitions, 5808 flow [2022-07-12 10:41:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-12 10:41:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-12 10:41:00,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2524 transitions. [2022-07-12 10:41:00,930 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6532091097308489 [2022-07-12 10:41:00,930 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2524 transitions. [2022-07-12 10:41:00,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2524 transitions. [2022-07-12 10:41:00,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:00,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2524 transitions. [2022-07-12 10:41:00,938 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) [2022-07-12 10:41:00,941 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) [2022-07-12 10:41:00,942 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) [2022-07-12 10:41:00,942 INFO L186 Difference]: Start difference. First operand has 182 places, 270 transitions, 2130 flow. Second operand 46 states and 2524 transitions. [2022-07-12 10:41:00,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 560 transitions, 5808 flow [2022-07-12 10:41:00,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 560 transitions, 5385 flow, removed 113 selfloop flow, removed 9 redundant places. [2022-07-12 10:41:00,977 INFO L242 Difference]: Finished difference. Result has 243 places, 426 transitions, 4246 flow [2022-07-12 10:41:00,978 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} [2022-07-12 10:41:00,979 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 169 predicate places. [2022-07-12 10:41:00,980 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 426 transitions, 4246 flow [2022-07-12 10:41:00,980 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) [2022-07-12 10:41:00,980 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:00,980 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:41:01,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:01,197 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 [2022-07-12 10:41:01,197 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:01,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:01,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1847654156, now seen corresponding path program 4 times [2022-07-12 10:41:01,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:01,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025345065] [2022-07-12 10:41:01,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:01,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:01,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:01,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025345065] [2022-07-12 10:41:01,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025345065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:01,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:01,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 10:41:01,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99356185] [2022-07-12 10:41:01,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:01,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:41:01,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:01,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:41:01,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:41:01,308 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:41:01,308 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) [2022-07-12 10:41:01,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:01,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:41:01,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:01,631 INFO L129 PetriNetUnfolder]: 314/867 cut-off events. [2022-07-12 10:41:01,631 INFO L130 PetriNetUnfolder]: For 7979/7979 co-relation queries the response was YES. [2022-07-12 10:41:01,635 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. [2022-07-12 10:41:01,640 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 175 selfloop transitions, 295 changer transitions 6/517 dead transitions. [2022-07-12 10:41:01,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 517 transitions, 6195 flow [2022-07-12 10:41:01,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 10:41:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-12 10:41:01,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1197 transitions. [2022-07-12 10:41:01,642 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2022-07-12 10:41:01,642 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1197 transitions. [2022-07-12 10:41:01,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1197 transitions. [2022-07-12 10:41:01,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:01,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1197 transitions. [2022-07-12 10:41:01,644 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) [2022-07-12 10:41:01,647 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) [2022-07-12 10:41:01,648 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) [2022-07-12 10:41:01,648 INFO L186 Difference]: Start difference. First operand has 243 places, 426 transitions, 4246 flow. Second operand 22 states and 1197 transitions. [2022-07-12 10:41:01,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 517 transitions, 6195 flow [2022-07-12 10:41:01,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 517 transitions, 5917 flow, removed 63 selfloop flow, removed 19 redundant places. [2022-07-12 10:41:01,696 INFO L242 Difference]: Finished difference. Result has 246 places, 500 transitions, 5637 flow [2022-07-12 10:41:01,696 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} [2022-07-12 10:41:01,697 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 172 predicate places. [2022-07-12 10:41:01,697 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 500 transitions, 5637 flow [2022-07-12 10:41:01,697 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) [2022-07-12 10:41:01,697 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:01,698 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:41:01,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:41:01,698 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:01,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:01,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1989198950, now seen corresponding path program 5 times [2022-07-12 10:41:01,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:01,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920095573] [2022-07-12 10:41:01,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:01,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:01,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:01,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920095573] [2022-07-12 10:41:01,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920095573] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:01,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849182452] [2022-07-12 10:41:01,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:41:01,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:01,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:01,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:01,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:41:01,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 10:41:01,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:01,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 10:41:01,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:02,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:02,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849182452] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:02,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:02,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2022-07-12 10:41:02,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628401934] [2022-07-12 10:41:02,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:02,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:41:02,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:02,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:41:02,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:41:02,144 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:41:02,145 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) [2022-07-12 10:41:02,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:02,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:41:02,146 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:02,804 INFO L129 PetriNetUnfolder]: 567/1570 cut-off events. [2022-07-12 10:41:02,805 INFO L130 PetriNetUnfolder]: For 13395/13395 co-relation queries the response was YES. [2022-07-12 10:41:02,813 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. [2022-07-12 10:41:02,821 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 239 selfloop transitions, 614 changer transitions 38/932 dead transitions. [2022-07-12 10:41:02,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 932 transitions, 12681 flow [2022-07-12 10:41:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 10:41:02,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-12 10:41:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1756 transitions. [2022-07-12 10:41:02,824 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6532738095238095 [2022-07-12 10:41:02,824 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1756 transitions. [2022-07-12 10:41:02,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1756 transitions. [2022-07-12 10:41:02,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:02,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1756 transitions. [2022-07-12 10:41:02,827 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) [2022-07-12 10:41:02,829 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) [2022-07-12 10:41:02,830 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) [2022-07-12 10:41:02,830 INFO L186 Difference]: Start difference. First operand has 246 places, 500 transitions, 5637 flow. Second operand 32 states and 1756 transitions. [2022-07-12 10:41:02,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 932 transitions, 12681 flow [2022-07-12 10:41:02,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 932 transitions, 12327 flow, removed 76 selfloop flow, removed 4 redundant places. [2022-07-12 10:41:02,924 INFO L242 Difference]: Finished difference. Result has 278 places, 794 transitions, 10901 flow [2022-07-12 10:41:02,924 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} [2022-07-12 10:41:02,925 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 204 predicate places. [2022-07-12 10:41:02,925 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 794 transitions, 10901 flow [2022-07-12 10:41:02,925 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) [2022-07-12 10:41:02,926 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:02,926 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:41:02,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:03,139 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 [2022-07-12 10:41:03,141 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:03,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:03,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1446076332, now seen corresponding path program 6 times [2022-07-12 10:41:03,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:03,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293289897] [2022-07-12 10:41:03,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:03,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:03,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:03,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293289897] [2022-07-12 10:41:03,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293289897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:03,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696975276] [2022-07-12 10:41:03,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:41:03,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:03,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:03,261 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:03,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:41:03,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-12 10:41:03,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:03,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 10:41:03,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:03,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:41:03,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696975276] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:03,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:03,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-07-12 10:41:03,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638119194] [2022-07-12 10:41:03,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:03,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 10:41:03,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:03,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 10:41:03,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-07-12 10:41:03,641 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:41:03,642 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) [2022-07-12 10:41:03,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:03,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:41:03,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:05,213 INFO L129 PetriNetUnfolder]: 982/2553 cut-off events. [2022-07-12 10:41:05,213 INFO L130 PetriNetUnfolder]: For 29039/29039 co-relation queries the response was YES. [2022-07-12 10:41:05,226 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. [2022-07-12 10:41:05,241 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 300 selfloop transitions, 1101 changer transitions 20/1462 dead transitions. [2022-07-12 10:41:05,241 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1462 transitions, 22972 flow [2022-07-12 10:41:05,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-12 10:41:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-12 10:41:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2711 transitions. [2022-07-12 10:41:05,249 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6586491739552964 [2022-07-12 10:41:05,249 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2711 transitions. [2022-07-12 10:41:05,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2711 transitions. [2022-07-12 10:41:05,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:05,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2711 transitions. [2022-07-12 10:41:05,256 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) [2022-07-12 10:41:05,260 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) [2022-07-12 10:41:05,270 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) [2022-07-12 10:41:05,270 INFO L186 Difference]: Start difference. First operand has 278 places, 794 transitions, 10901 flow. Second operand 49 states and 2711 transitions. [2022-07-12 10:41:05,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1462 transitions, 22972 flow [2022-07-12 10:41:05,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1462 transitions, 21639 flow, removed 94 selfloop flow, removed 14 redundant places. [2022-07-12 10:41:05,500 INFO L242 Difference]: Finished difference. Result has 321 places, 1303 transitions, 20930 flow [2022-07-12 10:41:05,500 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} [2022-07-12 10:41:05,501 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 247 predicate places. [2022-07-12 10:41:05,501 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 1303 transitions, 20930 flow [2022-07-12 10:41:05,501 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) [2022-07-12 10:41:05,501 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:05,501 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:41:05,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-12 10:41:05,712 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 [2022-07-12 10:41:05,713 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:05,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:05,718 INFO L85 PathProgramCache]: Analyzing trace with hash -481463372, now seen corresponding path program 7 times [2022-07-12 10:41:05,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:05,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062232132] [2022-07-12 10:41:05,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:05,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:05,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:05,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062232132] [2022-07-12 10:41:05,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062232132] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:05,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:05,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 10:41:05,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767716228] [2022-07-12 10:41:05,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:05,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:41:05,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:05,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:41:05,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:41:05,835 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:41:05,835 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) [2022-07-12 10:41:05,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:05,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:41:05,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:06,843 INFO L129 PetriNetUnfolder]: 1036/2636 cut-off events. [2022-07-12 10:41:06,843 INFO L130 PetriNetUnfolder]: For 38102/38102 co-relation queries the response was YES. [2022-07-12 10:41:06,861 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. [2022-07-12 10:41:06,877 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 930 selfloop transitions, 461 changer transitions 6/1438 dead transitions. [2022-07-12 10:41:06,877 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1438 transitions, 25804 flow [2022-07-12 10:41:06,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 10:41:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-12 10:41:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2022-07-12 10:41:06,878 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2022-07-12 10:41:06,878 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2022-07-12 10:41:06,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2022-07-12 10:41:06,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:06,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2022-07-12 10:41:06,879 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) [2022-07-12 10:41:06,880 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) [2022-07-12 10:41:06,880 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) [2022-07-12 10:41:06,881 INFO L186 Difference]: Start difference. First operand has 321 places, 1303 transitions, 20930 flow. Second operand 15 states and 824 transitions. [2022-07-12 10:41:06,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1438 transitions, 25804 flow [2022-07-12 10:41:07,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1438 transitions, 25588 flow, removed 82 selfloop flow, removed 10 redundant places. [2022-07-12 10:41:07,263 INFO L242 Difference]: Finished difference. Result has 332 places, 1402 transitions, 23575 flow [2022-07-12 10:41:07,264 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} [2022-07-12 10:41:07,264 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 258 predicate places. [2022-07-12 10:41:07,264 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 1402 transitions, 23575 flow [2022-07-12 10:41:07,265 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) [2022-07-12 10:41:07,265 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:07,265 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:41:07,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:41:07,265 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:07,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:07,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1161289794, now seen corresponding path program 8 times [2022-07-12 10:41:07,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:07,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925776066] [2022-07-12 10:41:07,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:07,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:07,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:07,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925776066] [2022-07-12 10:41:07,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925776066] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:07,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72555023] [2022-07-12 10:41:07,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:41:07,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:07,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:07,384 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:07,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:41:07,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:41:07,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:07,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 10:41:07,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:07,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:41:07,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72555023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:07,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:41:07,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-07-12 10:41:07,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258914356] [2022-07-12 10:41:07,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:07,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 10:41:07,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:07,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 10:41:07,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:41:07,622 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:41:07,623 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) [2022-07-12 10:41:07,623 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:07,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:41:07,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:08,956 INFO L129 PetriNetUnfolder]: 1249/3243 cut-off events. [2022-07-12 10:41:08,957 INFO L130 PetriNetUnfolder]: For 54227/54227 co-relation queries the response was YES. [2022-07-12 10:41:08,979 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. [2022-07-12 10:41:08,997 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1458 selfloop transitions, 196 changer transitions 10/1705 dead transitions. [2022-07-12 10:41:08,997 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 1705 transitions, 32235 flow [2022-07-12 10:41:08,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 10:41:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-12 10:41:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2022-07-12 10:41:08,998 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2022-07-12 10:41:08,998 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2022-07-12 10:41:08,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2022-07-12 10:41:08,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:08,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2022-07-12 10:41:08,999 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) [2022-07-12 10:41:09,001 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) [2022-07-12 10:41:09,001 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) [2022-07-12 10:41:09,001 INFO L186 Difference]: Start difference. First operand has 332 places, 1402 transitions, 23575 flow. Second operand 16 states and 910 transitions. [2022-07-12 10:41:09,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 1705 transitions, 32235 flow [2022-07-12 10:41:09,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1705 transitions, 32025 flow, removed 105 selfloop flow, removed 3 redundant places. [2022-07-12 10:41:09,487 INFO L242 Difference]: Finished difference. Result has 351 places, 1567 transitions, 27236 flow [2022-07-12 10:41:09,488 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} [2022-07-12 10:41:09,488 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 277 predicate places. [2022-07-12 10:41:09,489 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1567 transitions, 27236 flow [2022-07-12 10:41:09,489 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) [2022-07-12 10:41:09,489 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:09,489 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:41:09,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-12 10:41:09,697 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 [2022-07-12 10:41:09,698 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:09,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:09,698 INFO L85 PathProgramCache]: Analyzing trace with hash -623374472, now seen corresponding path program 9 times [2022-07-12 10:41:09,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:09,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209407628] [2022-07-12 10:41:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:09,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:09,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:09,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209407628] [2022-07-12 10:41:09,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209407628] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:09,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163330223] [2022-07-12 10:41:09,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:41:09,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:09,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:09,800 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:09,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:41:09,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:41:09,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:09,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 10:41:09,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:10,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:41:10,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163330223] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:10,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:41:10,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-07-12 10:41:10,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134119803] [2022-07-12 10:41:10,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:10,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 10:41:10,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:10,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 10:41:10,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:41:10,025 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:41:10,025 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) [2022-07-12 10:41:10,025 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:10,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:41:10,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:11,640 INFO L129 PetriNetUnfolder]: 1328/3463 cut-off events. [2022-07-12 10:41:11,640 INFO L130 PetriNetUnfolder]: For 59706/59706 co-relation queries the response was YES. [2022-07-12 10:41:11,666 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. [2022-07-12 10:41:11,686 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1511 selfloop transitions, 137 changer transitions 13/1702 dead transitions. [2022-07-12 10:41:11,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1702 transitions, 32815 flow [2022-07-12 10:41:11,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 10:41:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 10:41:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1006 transitions. [2022-07-12 10:41:11,688 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6653439153439153 [2022-07-12 10:41:11,688 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1006 transitions. [2022-07-12 10:41:11,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1006 transitions. [2022-07-12 10:41:11,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:11,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1006 transitions. [2022-07-12 10:41:11,689 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) [2022-07-12 10:41:11,690 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) [2022-07-12 10:41:11,690 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) [2022-07-12 10:41:11,690 INFO L186 Difference]: Start difference. First operand has 351 places, 1567 transitions, 27236 flow. Second operand 18 states and 1006 transitions. [2022-07-12 10:41:11,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1702 transitions, 32815 flow [2022-07-12 10:41:12,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1702 transitions, 32671 flow, removed 56 selfloop flow, removed 6 redundant places. [2022-07-12 10:41:12,316 INFO L242 Difference]: Finished difference. Result has 369 places, 1646 transitions, 28995 flow [2022-07-12 10:41:12,317 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} [2022-07-12 10:41:12,318 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 295 predicate places. [2022-07-12 10:41:12,318 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1646 transitions, 28995 flow [2022-07-12 10:41:12,318 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) [2022-07-12 10:41:12,318 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:12,318 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:41:12,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:12,534 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 [2022-07-12 10:41:12,534 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:12,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:12,535 INFO L85 PathProgramCache]: Analyzing trace with hash 474873992, now seen corresponding path program 10 times [2022-07-12 10:41:12,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:12,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611271437] [2022-07-12 10:41:12,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:12,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:12,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:12,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611271437] [2022-07-12 10:41:12,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611271437] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:12,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288993564] [2022-07-12 10:41:12,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:41:12,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:12,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:12,627 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:12,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:41:12,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:41:12,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:12,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 10:41:12,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:12,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:41:12,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288993564] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:12,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:41:12,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-07-12 10:41:12,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411207033] [2022-07-12 10:41:12,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:12,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 10:41:12,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:12,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 10:41:12,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:41:12,850 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:41:12,850 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) [2022-07-12 10:41:12,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:12,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:41:12,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:14,767 INFO L129 PetriNetUnfolder]: 1417/3695 cut-off events. [2022-07-12 10:41:14,767 INFO L130 PetriNetUnfolder]: For 68812/68812 co-relation queries the response was YES. [2022-07-12 10:41:14,794 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. [2022-07-12 10:41:14,824 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1599 selfloop transitions, 153 changer transitions 10/1803 dead transitions. [2022-07-12 10:41:14,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1803 transitions, 35606 flow [2022-07-12 10:41:14,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:41:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:41:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1163 transitions. [2022-07-12 10:41:14,826 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.659297052154195 [2022-07-12 10:41:14,826 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1163 transitions. [2022-07-12 10:41:14,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1163 transitions. [2022-07-12 10:41:14,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:14,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1163 transitions. [2022-07-12 10:41:14,827 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) [2022-07-12 10:41:14,829 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) [2022-07-12 10:41:14,829 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) [2022-07-12 10:41:14,829 INFO L186 Difference]: Start difference. First operand has 369 places, 1646 transitions, 28995 flow. Second operand 21 states and 1163 transitions. [2022-07-12 10:41:14,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1803 transitions, 35606 flow [2022-07-12 10:41:15,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1803 transitions, 35336 flow, removed 117 selfloop flow, removed 7 redundant places. [2022-07-12 10:41:15,508 INFO L242 Difference]: Finished difference. Result has 390 places, 1745 transitions, 31399 flow [2022-07-12 10:41:15,510 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} [2022-07-12 10:41:15,510 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 316 predicate places. [2022-07-12 10:41:15,510 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 1745 transitions, 31399 flow [2022-07-12 10:41:15,511 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) [2022-07-12 10:41:15,511 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:15,511 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] [2022-07-12 10:41:15,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:15,728 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 [2022-07-12 10:41:15,729 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:15,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:15,729 INFO L85 PathProgramCache]: Analyzing trace with hash -240400877, now seen corresponding path program 11 times [2022-07-12 10:41:15,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:15,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460059973] [2022-07-12 10:41:15,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:15,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:15,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:15,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460059973] [2022-07-12 10:41:15,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460059973] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:15,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784247570] [2022-07-12 10:41:15,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:41:15,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:15,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:15,789 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:15,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:41:15,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 10:41:15,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:15,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:41:15,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:16,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:16,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784247570] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:16,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:16,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-12 10:41:16,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391122860] [2022-07-12 10:41:16,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:16,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:41:16,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:41:16,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:41:16,158 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:41:16,159 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) [2022-07-12 10:41:16,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:16,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:41:16,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:18,337 INFO L129 PetriNetUnfolder]: 1570/4126 cut-off events. [2022-07-12 10:41:18,337 INFO L130 PetriNetUnfolder]: For 82120/82120 co-relation queries the response was YES. [2022-07-12 10:41:18,375 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. [2022-07-12 10:41:18,401 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 1232 selfloop transitions, 740 changer transitions 25/2038 dead transitions. [2022-07-12 10:41:18,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 2038 transitions, 40623 flow [2022-07-12 10:41:18,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 10:41:18,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-12 10:41:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1071 transitions. [2022-07-12 10:41:18,403 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2022-07-12 10:41:18,403 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1071 transitions. [2022-07-12 10:41:18,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1071 transitions. [2022-07-12 10:41:18,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:18,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1071 transitions. [2022-07-12 10:41:18,405 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) [2022-07-12 10:41:18,406 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) [2022-07-12 10:41:18,406 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) [2022-07-12 10:41:18,406 INFO L186 Difference]: Start difference. First operand has 390 places, 1745 transitions, 31399 flow. Second operand 19 states and 1071 transitions. [2022-07-12 10:41:18,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 2038 transitions, 40623 flow [2022-07-12 10:41:19,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 2038 transitions, 40265 flow, removed 161 selfloop flow, removed 7 redundant places. [2022-07-12 10:41:19,354 INFO L242 Difference]: Finished difference. Result has 408 places, 1890 transitions, 36756 flow [2022-07-12 10:41:19,355 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} [2022-07-12 10:41:19,356 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 334 predicate places. [2022-07-12 10:41:19,356 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 1890 transitions, 36756 flow [2022-07-12 10:41:19,357 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) [2022-07-12 10:41:19,357 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:19,357 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] [2022-07-12 10:41:19,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:19,562 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 [2022-07-12 10:41:19,563 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:19,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:19,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1349597943, now seen corresponding path program 12 times [2022-07-12 10:41:19,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:19,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919157432] [2022-07-12 10:41:19,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:19,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:19,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:19,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919157432] [2022-07-12 10:41:19,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919157432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:19,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294995372] [2022-07-12 10:41:19,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:41:19,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:19,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:19,650 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:19,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:41:19,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 10:41:19,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:19,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:41:19,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:19,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:19,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294995372] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:19,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:19,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-12 10:41:19,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915687655] [2022-07-12 10:41:19,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:19,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 10:41:19,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:19,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 10:41:19,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-07-12 10:41:19,990 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:41:19,991 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) [2022-07-12 10:41:19,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:19,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:41:19,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:23,678 INFO L129 PetriNetUnfolder]: 1993/5336 cut-off events. [2022-07-12 10:41:23,678 INFO L130 PetriNetUnfolder]: For 146667/146667 co-relation queries the response was YES. [2022-07-12 10:41:23,738 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. [2022-07-12 10:41:23,773 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1142 selfloop transitions, 1472 changer transitions 34/2689 dead transitions. [2022-07-12 10:41:23,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 2689 transitions, 58358 flow [2022-07-12 10:41:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-12 10:41:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-07-12 10:41:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3701 transitions. [2022-07-12 10:41:23,777 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6576048329779673 [2022-07-12 10:41:23,777 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3701 transitions. [2022-07-12 10:41:23,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3701 transitions. [2022-07-12 10:41:23,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:23,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3701 transitions. [2022-07-12 10:41:23,794 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) [2022-07-12 10:41:23,798 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) [2022-07-12 10:41:23,799 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) [2022-07-12 10:41:23,799 INFO L186 Difference]: Start difference. First operand has 408 places, 1890 transitions, 36756 flow. Second operand 67 states and 3701 transitions. [2022-07-12 10:41:23,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 2689 transitions, 58358 flow [2022-07-12 10:41:25,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 2689 transitions, 57773 flow, removed 238 selfloop flow, removed 8 redundant places. [2022-07-12 10:41:25,295 INFO L242 Difference]: Finished difference. Result has 499 places, 2489 transitions, 55032 flow [2022-07-12 10:41:25,297 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} [2022-07-12 10:41:25,297 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 425 predicate places. [2022-07-12 10:41:25,297 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 2489 transitions, 55032 flow [2022-07-12 10:41:25,297 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) [2022-07-12 10:41:25,297 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:25,298 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] [2022-07-12 10:41:25,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-12 10:41:25,504 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 [2022-07-12 10:41:25,505 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:25,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1573275163, now seen corresponding path program 13 times [2022-07-12 10:41:25,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:25,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500362589] [2022-07-12 10:41:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:25,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:25,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:25,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500362589] [2022-07-12 10:41:25,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500362589] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:25,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965393881] [2022-07-12 10:41:25,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:41:25,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:25,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:25,560 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:25,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:41:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:25,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 10:41:25,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:25,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:25,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965393881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:25,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:25,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-07-12 10:41:25,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739568230] [2022-07-12 10:41:25,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:25,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 10:41:25,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:25,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 10:41:25,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-12 10:41:25,886 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:41:25,886 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) [2022-07-12 10:41:25,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:25,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:41:25,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:31,398 INFO L129 PetriNetUnfolder]: 2534/6394 cut-off events. [2022-07-12 10:41:31,399 INFO L130 PetriNetUnfolder]: For 194472/194472 co-relation queries the response was YES. [2022-07-12 10:41:31,472 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. [2022-07-12 10:41:31,515 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1730 selfloop transitions, 1611 changer transitions 14/3396 dead transitions. [2022-07-12 10:41:31,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 3396 transitions, 82660 flow [2022-07-12 10:41:31,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 10:41:31,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-07-12 10:41:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2628 transitions. [2022-07-12 10:41:31,539 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6517857142857143 [2022-07-12 10:41:31,539 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2628 transitions. [2022-07-12 10:41:31,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2628 transitions. [2022-07-12 10:41:31,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:31,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2628 transitions. [2022-07-12 10:41:31,542 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) [2022-07-12 10:41:31,545 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) [2022-07-12 10:41:31,545 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) [2022-07-12 10:41:31,545 INFO L186 Difference]: Start difference. First operand has 499 places, 2489 transitions, 55032 flow. Second operand 48 states and 2628 transitions. [2022-07-12 10:41:31,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 3396 transitions, 82660 flow [2022-07-12 10:41:34,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 3396 transitions, 79239 flow, removed 1611 selfloop flow, removed 10 redundant places. [2022-07-12 10:41:34,371 INFO L242 Difference]: Finished difference. Result has 557 places, 3192 transitions, 75273 flow [2022-07-12 10:41:34,373 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} [2022-07-12 10:41:34,373 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 483 predicate places. [2022-07-12 10:41:34,373 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 3192 transitions, 75273 flow [2022-07-12 10:41:34,374 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) [2022-07-12 10:41:34,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:34,374 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] [2022-07-12 10:41:34,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:34,591 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 [2022-07-12 10:41:34,591 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:34,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:34,592 INFO L85 PathProgramCache]: Analyzing trace with hash 242113833, now seen corresponding path program 14 times [2022-07-12 10:41:34,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:34,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346457656] [2022-07-12 10:41:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:34,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:34,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:34,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346457656] [2022-07-12 10:41:34,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346457656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:34,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992561884] [2022-07-12 10:41:34,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:41:34,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:34,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:34,672 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:34,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 10:41:34,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:41:34,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:34,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:41:34,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:34,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:34,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992561884] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:34,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:34,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-12 10:41:34,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558576182] [2022-07-12 10:41:34,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:34,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 10:41:34,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:34,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 10:41:34,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-07-12 10:41:34,999 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:41:35,000 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) [2022-07-12 10:41:35,000 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:35,000 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:41:35,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:41,758 INFO L129 PetriNetUnfolder]: 2563/6504 cut-off events. [2022-07-12 10:41:41,758 INFO L130 PetriNetUnfolder]: For 178303/178303 co-relation queries the response was YES. [2022-07-12 10:41:41,844 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. [2022-07-12 10:41:41,891 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1563 selfloop transitions, 1781 changer transitions 27/3412 dead transitions. [2022-07-12 10:41:41,891 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 3412 transitions, 86614 flow [2022-07-12 10:41:41,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-12 10:41:41,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-12 10:41:41,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2856 transitions. [2022-07-12 10:41:41,893 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2022-07-12 10:41:41,893 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2856 transitions. [2022-07-12 10:41:41,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2856 transitions. [2022-07-12 10:41:41,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:41,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2856 transitions. [2022-07-12 10:41:41,896 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) [2022-07-12 10:41:41,907 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) [2022-07-12 10:41:41,907 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) [2022-07-12 10:41:41,907 INFO L186 Difference]: Start difference. First operand has 557 places, 3192 transitions, 75273 flow. Second operand 52 states and 2856 transitions. [2022-07-12 10:41:41,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 3412 transitions, 86614 flow [2022-07-12 10:41:44,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 3412 transitions, 83438 flow, removed 1472 selfloop flow, removed 13 redundant places. [2022-07-12 10:41:44,861 INFO L242 Difference]: Finished difference. Result has 594 places, 3282 transitions, 80227 flow [2022-07-12 10:41:44,864 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} [2022-07-12 10:41:44,864 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 520 predicate places. [2022-07-12 10:41:44,864 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 3282 transitions, 80227 flow [2022-07-12 10:41:44,865 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) [2022-07-12 10:41:44,865 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:44,866 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] [2022-07-12 10:41:44,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:45,079 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 [2022-07-12 10:41:45,080 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:45,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:45,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1203639799, now seen corresponding path program 15 times [2022-07-12 10:41:45,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:45,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665655487] [2022-07-12 10:41:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:45,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:41:45,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:45,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665655487] [2022-07-12 10:41:45,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665655487] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:45,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824110085] [2022-07-12 10:41:45,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:41:45,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:45,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:45,147 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:45,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 10:41:45,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:41:45,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:45,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:41:45,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:45,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:45,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824110085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:45,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:45,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-07-12 10:41:45,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369094155] [2022-07-12 10:41:45,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:45,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 10:41:45,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:45,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 10:41:45,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-07-12 10:41:45,458 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:41:45,459 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) [2022-07-12 10:41:45,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:45,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:41:45,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:54,091 INFO L129 PetriNetUnfolder]: 2977/7605 cut-off events. [2022-07-12 10:41:54,091 INFO L130 PetriNetUnfolder]: For 209622/209622 co-relation queries the response was YES. [2022-07-12 10:41:54,232 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. [2022-07-12 10:41:54,293 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1696 selfloop transitions, 2062 changer transitions 6/3805 dead transitions. [2022-07-12 10:41:54,293 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 3805 transitions, 101709 flow [2022-07-12 10:41:54,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 10:41:54,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-12 10:41:54,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1920 transitions. [2022-07-12 10:41:54,295 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2022-07-12 10:41:54,295 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1920 transitions. [2022-07-12 10:41:54,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1920 transitions. [2022-07-12 10:41:54,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:54,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1920 transitions. [2022-07-12 10:41:54,297 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) [2022-07-12 10:41:54,299 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) [2022-07-12 10:41:54,300 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) [2022-07-12 10:41:54,300 INFO L186 Difference]: Start difference. First operand has 594 places, 3282 transitions, 80227 flow. Second operand 35 states and 1920 transitions. [2022-07-12 10:41:54,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 3805 transitions, 101709 flow [2022-07-12 10:41:57,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 3805 transitions, 98472 flow, removed 167 selfloop flow, removed 25 redundant places. [2022-07-12 10:41:57,955 INFO L242 Difference]: Finished difference. Result has 615 places, 3700 transitions, 96148 flow [2022-07-12 10:41:57,957 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} [2022-07-12 10:41:57,958 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 541 predicate places. [2022-07-12 10:41:57,958 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 3700 transitions, 96148 flow [2022-07-12 10:41:57,958 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) [2022-07-12 10:41:57,958 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:57,958 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] [2022-07-12 10:41:57,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:58,171 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 [2022-07-12 10:41:58,171 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:58,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1905586027, now seen corresponding path program 16 times [2022-07-12 10:41:58,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:58,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486163065] [2022-07-12 10:41:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:58,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:58,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:58,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486163065] [2022-07-12 10:41:58,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486163065] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:58,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912702605] [2022-07-12 10:41:58,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:41:58,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:58,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:58,235 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:58,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 10:41:58,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:41:58,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:58,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:41:58,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:58,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:58,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912702605] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:58,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:58,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-12 10:41:58,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887388840] [2022-07-12 10:41:58,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:58,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:41:58,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:58,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:41:58,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:41:58,520 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:41:58,521 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) [2022-07-12 10:41:58,521 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:58,521 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:41:58,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:07,436 INFO L129 PetriNetUnfolder]: 3382/8424 cut-off events. [2022-07-12 10:42:07,437 INFO L130 PetriNetUnfolder]: For 275824/275824 co-relation queries the response was YES. [2022-07-12 10:42:07,563 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. [2022-07-12 10:42:07,625 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 2803 selfloop transitions, 1465 changer transitions 11/4320 dead transitions. [2022-07-12 10:42:07,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 4320 transitions, 121788 flow [2022-07-12 10:42:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 10:42:07,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-12 10:42:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1596 transitions. [2022-07-12 10:42:07,627 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6551724137931034 [2022-07-12 10:42:07,627 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1596 transitions. [2022-07-12 10:42:07,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1596 transitions. [2022-07-12 10:42:07,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:07,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1596 transitions. [2022-07-12 10:42:07,629 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) [2022-07-12 10:42:07,631 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) [2022-07-12 10:42:07,631 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) [2022-07-12 10:42:07,631 INFO L186 Difference]: Start difference. First operand has 615 places, 3700 transitions, 96148 flow. Second operand 29 states and 1596 transitions. [2022-07-12 10:42:07,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 4320 transitions, 121788 flow [2022-07-12 10:42:12,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 629 places, 4320 transitions, 116605 flow, removed 1013 selfloop flow, removed 14 redundant places. [2022-07-12 10:42:12,428 INFO L242 Difference]: Finished difference. Result has 642 places, 4151 transitions, 110672 flow [2022-07-12 10:42:12,432 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} [2022-07-12 10:42:12,432 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 568 predicate places. [2022-07-12 10:42:12,432 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 4151 transitions, 110672 flow [2022-07-12 10:42:12,433 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) [2022-07-12 10:42:12,433 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:12,433 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:42:12,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-12 10:42:12,641 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 [2022-07-12 10:42:12,641 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:12,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:12,641 INFO L85 PathProgramCache]: Analyzing trace with hash -723433217, now seen corresponding path program 17 times [2022-07-12 10:42:12,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:12,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052043243] [2022-07-12 10:42:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:12,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:12,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:12,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052043243] [2022-07-12 10:42:12,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052043243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:12,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513482592] [2022-07-12 10:42:12,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:42:12,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:12,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:12,720 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:12,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 10:42:12,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 10:42:12,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:42:12,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 10:42:12,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:12,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:13,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513482592] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:13,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:13,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 28 [2022-07-12 10:42:13,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863733077] [2022-07-12 10:42:13,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:13,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 10:42:13,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:13,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 10:42:13,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-07-12 10:42:13,170 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:42:13,171 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) [2022-07-12 10:42:13,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:13,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:42:13,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:24,517 INFO L129 PetriNetUnfolder]: 3505/8631 cut-off events. [2022-07-12 10:42:24,517 INFO L130 PetriNetUnfolder]: For 285467/285467 co-relation queries the response was YES. [2022-07-12 10:42:24,641 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. [2022-07-12 10:42:24,707 INFO L132 encePairwiseOnDemand]: 64/84 looper letters, 167 selfloop transitions, 4433 changer transitions 260/4901 dead transitions. [2022-07-12 10:42:24,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 4901 transitions, 140893 flow [2022-07-12 10:42:24,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-12 10:42:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-12 10:42:24,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3513 transitions. [2022-07-12 10:42:24,710 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6434065934065935 [2022-07-12 10:42:24,711 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3513 transitions. [2022-07-12 10:42:24,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3513 transitions. [2022-07-12 10:42:24,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:24,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3513 transitions. [2022-07-12 10:42:24,714 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) [2022-07-12 10:42:24,718 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) [2022-07-12 10:42:24,718 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) [2022-07-12 10:42:24,718 INFO L186 Difference]: Start difference. First operand has 642 places, 4151 transitions, 110672 flow. Second operand 65 states and 3513 transitions. [2022-07-12 10:42:24,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 4901 transitions, 140893 flow [2022-07-12 10:42:29,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 688 places, 4901 transitions, 140341 flow, removed 133 selfloop flow, removed 15 redundant places. [2022-07-12 10:42:29,711 INFO L242 Difference]: Finished difference. Result has 710 places, 4566 transitions, 135855 flow [2022-07-12 10:42:29,714 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} [2022-07-12 10:42:29,715 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 636 predicate places. [2022-07-12 10:42:29,715 INFO L495 AbstractCegarLoop]: Abstraction has has 710 places, 4566 transitions, 135855 flow [2022-07-12 10:42:29,715 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) [2022-07-12 10:42:29,715 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:29,715 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] [2022-07-12 10:42:29,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 10:42:29,928 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 [2022-07-12 10:42:29,929 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:29,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:29,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1126888515, now seen corresponding path program 18 times [2022-07-12 10:42:29,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:29,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867483706] [2022-07-12 10:42:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:29,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:29,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867483706] [2022-07-12 10:42:29,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867483706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199872655] [2022-07-12 10:42:29,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:42:29,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:29,991 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:29,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 10:42:30,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 10:42:30,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:42:30,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:42:30,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:30,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:30,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199872655] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:30,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:30,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-07-12 10:42:30,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498422427] [2022-07-12 10:42:30,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:30,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 10:42:30,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:30,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 10:42:30,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-07-12 10:42:30,316 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:42:30,316 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) [2022-07-12 10:42:30,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:30,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:42:30,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:43,428 INFO L129 PetriNetUnfolder]: 3657/8295 cut-off events. [2022-07-12 10:42:43,428 INFO L130 PetriNetUnfolder]: For 334985/334985 co-relation queries the response was YES. [2022-07-12 10:42:43,573 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. [2022-07-12 10:42:43,648 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3522 selfloop transitions, 1563 changer transitions 4/5130 dead transitions. [2022-07-12 10:42:43,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 5130 transitions, 164211 flow [2022-07-12 10:42:43,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-12 10:42:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-12 10:42:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2679 transitions. [2022-07-12 10:42:43,651 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6508746355685131 [2022-07-12 10:42:43,651 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2679 transitions. [2022-07-12 10:42:43,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2679 transitions. [2022-07-12 10:42:43,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:43,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2679 transitions. [2022-07-12 10:42:43,654 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) [2022-07-12 10:42:43,656 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) [2022-07-12 10:42:43,657 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) [2022-07-12 10:42:43,657 INFO L186 Difference]: Start difference. First operand has 710 places, 4566 transitions, 135855 flow. Second operand 49 states and 2679 transitions. [2022-07-12 10:42:43,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 5130 transitions, 164211 flow [2022-07-12 10:42:50,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 5130 transitions, 153577 flow, removed 2314 selfloop flow, removed 37 redundant places. [2022-07-12 10:42:50,640 INFO L242 Difference]: Finished difference. Result has 705 places, 5008 transitions, 145047 flow [2022-07-12 10:42:50,643 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} [2022-07-12 10:42:50,644 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 631 predicate places. [2022-07-12 10:42:50,644 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 5008 transitions, 145047 flow [2022-07-12 10:42:50,644 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) [2022-07-12 10:42:50,644 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:50,644 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] [2022-07-12 10:42:50,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-12 10:42:50,855 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 [2022-07-12 10:42:50,855 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:50,856 INFO L85 PathProgramCache]: Analyzing trace with hash -66159831, now seen corresponding path program 19 times [2022-07-12 10:42:50,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:50,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483645724] [2022-07-12 10:42:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:50,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:50,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:50,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483645724] [2022-07-12 10:42:50,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483645724] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:50,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756618914] [2022-07-12 10:42:50,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:42:50,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:50,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:50,919 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:50,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 10:42:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:50,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 10:42:50,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:51,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:51,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756618914] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:51,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:51,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 25 [2022-07-12 10:42:51,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310026893] [2022-07-12 10:42:51,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:51,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 10:42:51,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:51,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 10:42:51,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-07-12 10:42:51,272 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:42:51,273 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) [2022-07-12 10:42:51,273 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:51,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:42:51,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:43:06,283 INFO L129 PetriNetUnfolder]: 3891/8904 cut-off events. [2022-07-12 10:43:06,284 INFO L130 PetriNetUnfolder]: For 324690/324690 co-relation queries the response was YES. [2022-07-12 10:43:06,427 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. [2022-07-12 10:43:06,507 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3196 selfloop transitions, 2182 changer transitions 12/5431 dead transitions. [2022-07-12 10:43:06,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 5431 transitions, 168218 flow [2022-07-12 10:43:06,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-12 10:43:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-12 10:43:06,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2523 transitions. [2022-07-12 10:43:06,509 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6529503105590062 [2022-07-12 10:43:06,509 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2523 transitions. [2022-07-12 10:43:06,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2523 transitions. [2022-07-12 10:43:06,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:43:06,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2523 transitions. [2022-07-12 10:43:06,512 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) [2022-07-12 10:43:06,514 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) [2022-07-12 10:43:06,515 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) [2022-07-12 10:43:06,515 INFO L186 Difference]: Start difference. First operand has 705 places, 5008 transitions, 145047 flow. Second operand 46 states and 2523 transitions. [2022-07-12 10:43:06,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 5431 transitions, 168218 flow [2022-07-12 10:43:13,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 743 places, 5431 transitions, 166364 flow, removed 908 selfloop flow, removed 7 redundant places. [2022-07-12 10:43:13,579 INFO L242 Difference]: Finished difference. Result has 768 places, 5360 transitions, 162919 flow [2022-07-12 10:43:13,583 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} [2022-07-12 10:43:13,584 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 694 predicate places. [2022-07-12 10:43:13,584 INFO L495 AbstractCegarLoop]: Abstraction has has 768 places, 5360 transitions, 162919 flow [2022-07-12 10:43:13,584 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) [2022-07-12 10:43:13,584 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:43:13,584 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] [2022-07-12 10:43:13,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-12 10:43:13,800 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 [2022-07-12 10:43:13,800 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:43:13,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:43:13,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1602266621, now seen corresponding path program 20 times [2022-07-12 10:43:13,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:43:13,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669564567] [2022-07-12 10:43:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:43:13,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:43:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:43:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:13,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:43:13,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669564567] [2022-07-12 10:43:13,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669564567] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:43:13,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721808142] [2022-07-12 10:43:13,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:43:13,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:43:13,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:43:13,866 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:43:13,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 10:43:13,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:43:13,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:43:13,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:43:13,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:43:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:14,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:43:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:14,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721808142] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:43:14,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:43:14,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-12 10:43:14,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720470838] [2022-07-12 10:43:14,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:43:14,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:43:14,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:43:14,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:43:14,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:43:14,173 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:43:14,174 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) [2022-07-12 10:43:14,174 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:43:14,174 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:43:14,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:43:34,947 INFO L129 PetriNetUnfolder]: 4020/9124 cut-off events. [2022-07-12 10:43:34,947 INFO L130 PetriNetUnfolder]: For 393200/393200 co-relation queries the response was YES. [2022-07-12 10:43:35,116 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. [2022-07-12 10:43:35,198 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 4009 selfloop transitions, 1607 changer transitions 0/5657 dead transitions. [2022-07-12 10:43:35,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 810 places, 5657 transitions, 182757 flow [2022-07-12 10:43:35,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 10:43:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-12 10:43:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2343 transitions. [2022-07-12 10:43:35,200 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486710963455149 [2022-07-12 10:43:35,200 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2343 transitions. [2022-07-12 10:43:35,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2343 transitions. [2022-07-12 10:43:35,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:43:35,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2343 transitions. [2022-07-12 10:43:35,202 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) [2022-07-12 10:43:35,374 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) [2022-07-12 10:43:35,374 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) [2022-07-12 10:43:35,374 INFO L186 Difference]: Start difference. First operand has 768 places, 5360 transitions, 162919 flow. Second operand 43 states and 2343 transitions. [2022-07-12 10:43:35,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 810 places, 5657 transitions, 182757 flow [2022-07-12 10:43:43,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 5657 transitions, 180544 flow, removed 1021 selfloop flow, removed 9 redundant places. [2022-07-12 10:43:43,495 INFO L242 Difference]: Finished difference. Result has 817 places, 5530 transitions, 171656 flow [2022-07-12 10:43:43,499 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} [2022-07-12 10:43:43,500 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 743 predicate places. [2022-07-12 10:43:43,500 INFO L495 AbstractCegarLoop]: Abstraction has has 817 places, 5530 transitions, 171656 flow [2022-07-12 10:43:43,500 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) [2022-07-12 10:43:43,501 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:43:43,501 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] [2022-07-12 10:43:43,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-12 10:43:43,738 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 [2022-07-12 10:43:43,738 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:43:43,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:43:43,739 INFO L85 PathProgramCache]: Analyzing trace with hash 72955617, now seen corresponding path program 21 times [2022-07-12 10:43:43,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:43:43,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189455346] [2022-07-12 10:43:43,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:43:43,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:43:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:43:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:43,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:43:43,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189455346] [2022-07-12 10:43:43,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189455346] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:43:43,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969042477] [2022-07-12 10:43:43,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:43:43,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:43:43,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:43:43,811 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:43:43,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 10:43:43,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:43:43,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:43:43,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:43:43,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:43:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:44,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:43:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:44,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969042477] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:43:44,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:43:44,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-07-12 10:43:44,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760018297] [2022-07-12 10:43:44,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:43:44,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 10:43:44,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:43:44,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 10:43:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-07-12 10:43:44,150 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:43:44,151 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) [2022-07-12 10:43:44,151 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:43:44,151 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:43:44,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:07,266 INFO L129 PetriNetUnfolder]: 4862/11036 cut-off events. [2022-07-12 10:44:07,266 INFO L130 PetriNetUnfolder]: For 498714/498714 co-relation queries the response was YES. [2022-07-12 10:44:07,484 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. [2022-07-12 10:44:07,585 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3200 selfloop transitions, 3744 changer transitions 11/6996 dead transitions. [2022-07-12 10:44:07,586 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 6996 transitions, 231807 flow [2022-07-12 10:44:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 10:44:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-12 10:44:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1887 transitions. [2022-07-12 10:44:07,588 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2022-07-12 10:44:07,588 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1887 transitions. [2022-07-12 10:44:07,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1887 transitions. [2022-07-12 10:44:07,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:07,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1887 transitions. [2022-07-12 10:44:07,590 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) [2022-07-12 10:44:07,591 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) [2022-07-12 10:44:07,591 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) [2022-07-12 10:44:07,592 INFO L186 Difference]: Start difference. First operand has 817 places, 5530 transitions, 171656 flow. Second operand 34 states and 1887 transitions. [2022-07-12 10:44:07,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 6996 transitions, 231807 flow [2022-07-12 10:44:18,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 838 places, 6996 transitions, 231565 flow, removed 71 selfloop flow, removed 12 redundant places. [2022-07-12 10:44:18,356 INFO L242 Difference]: Finished difference. Result has 853 places, 6586 transitions, 222391 flow [2022-07-12 10:44:18,360 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} [2022-07-12 10:44:18,361 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 779 predicate places. [2022-07-12 10:44:18,361 INFO L495 AbstractCegarLoop]: Abstraction has has 853 places, 6586 transitions, 222391 flow [2022-07-12 10:44:18,361 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) [2022-07-12 10:44:18,361 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:18,361 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] [2022-07-12 10:44:18,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 10:44:18,592 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 [2022-07-12 10:44:18,592 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:18,593 INFO L85 PathProgramCache]: Analyzing trace with hash 816924545, now seen corresponding path program 22 times [2022-07-12 10:44:18,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:18,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079015571] [2022-07-12 10:44:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:18,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:18,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:18,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079015571] [2022-07-12 10:44:18,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079015571] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:44:18,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695335509] [2022-07-12 10:44:18,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:44:18,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:44:18,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:44:18,649 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:44:18,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 10:44:18,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:44:18,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:44:18,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:44:18,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:44:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:18,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:44:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:18,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695335509] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:44:18,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:44:18,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-12 10:44:18,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840562520] [2022-07-12 10:44:18,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:44:18,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 10:44:18,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:18,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 10:44:18,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-07-12 10:44:18,967 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:44:18,967 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) [2022-07-12 10:44:18,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:18,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:44:18,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:52,371 INFO L129 PetriNetUnfolder]: 5006/11426 cut-off events. [2022-07-12 10:44:52,372 INFO L130 PetriNetUnfolder]: For 614376/614376 co-relation queries the response was YES. [2022-07-12 10:44:52,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171801 conditions, 11426 events. 5006/11426 cut-off events. For 614376/614376 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 105574 event pairs, 19 based on Foata normal form. 14/11423 useless extension candidates. Maximal degree in co-relation 171542. Up to 4255 conditions per place. [2022-07-12 10:44:52,695 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 4078 selfloop transitions, 2756 changer transitions 27/6902 dead transitions. [2022-07-12 10:44:52,695 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 906 places, 6902 transitions, 245062 flow [2022-07-12 10:44:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-12 10:44:52,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-12 10:44:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2957 transitions. [2022-07-12 10:44:52,697 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6518959435626103 [2022-07-12 10:44:52,697 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2957 transitions. [2022-07-12 10:44:52,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2957 transitions. [2022-07-12 10:44:52,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:52,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2957 transitions. [2022-07-12 10:44:52,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 54.75925925925926) internal successors, (2957), 54 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:52,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 84.0) internal successors, (4620), 55 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:52,703 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 84.0) internal successors, (4620), 55 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:52,703 INFO L186 Difference]: Start difference. First operand has 853 places, 6586 transitions, 222391 flow. Second operand 54 states and 2957 transitions. [2022-07-12 10:44:52,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 906 places, 6902 transitions, 245062 flow [2022-07-12 10:45:06,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 893 places, 6902 transitions, 243839 flow, removed 455 selfloop flow, removed 13 redundant places. [2022-07-12 10:45:06,433 INFO L242 Difference]: Finished difference. Result has 910 places, 6780 transitions, 235745 flow [2022-07-12 10:45:06,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=221240, PETRI_DIFFERENCE_MINUEND_PLACES=840, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3923, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=235745, PETRI_PLACES=910, PETRI_TRANSITIONS=6780} [2022-07-12 10:45:06,438 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 836 predicate places. [2022-07-12 10:45:06,438 INFO L495 AbstractCegarLoop]: Abstraction has has 910 places, 6780 transitions, 235745 flow [2022-07-12 10:45:06,439 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) [2022-07-12 10:45:06,439 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:06,439 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] [2022-07-12 10:45:06,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 10:45:06,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-12 10:45:06,655 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:06,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1004762847, now seen corresponding path program 23 times [2022-07-12 10:45:06,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:06,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228330774] [2022-07-12 10:45:06,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:06,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:06,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:06,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228330774] [2022-07-12 10:45:06,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228330774] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:06,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608208201] [2022-07-12 10:45:06,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:45:06,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:06,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:06,760 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:45:06,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 10:45:06,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 10:45:06,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:45:06,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:45:06,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:06,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:07,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608208201] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:07,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:07,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-07-12 10:45:07,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086844733] [2022-07-12 10:45:07,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:07,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:45:07,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:07,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:45:07,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:45:07,047 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-12 10:45:07,047 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 910 places, 6780 transitions, 235745 flow. Second operand has 20 states, 20 states have (on average 53.6) internal successors, (1072), 20 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:45:07,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:07,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-12 10:45:07,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand