./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/unroll-cond-2.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 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:19:07,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:19:07,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:19:07,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:19:07,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:19:07,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:19:07,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:19:07,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:19:07,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:19:07,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:19:07,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:19:07,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:19:07,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:19:07,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:19:07,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:19:07,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:19:07,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:19:07,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:19:07,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:19:07,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:19:07,845 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:19:07,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:19:07,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:19:07,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:19:07,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:19:07,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:19:07,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:19:07,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:19:07,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:19:07,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:19:07,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:19:07,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:19:07,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:19:07,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:19:07,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:19:07,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:19:07,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:19:07,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:19:07,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:19:07,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:19:07,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:19:07,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:19:07,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:19:07,905 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:19:07,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:19:07,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:19:07,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:19:07,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:19:07,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:19:07,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:19:07,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:19:07,908 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:19:07,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:19:07,909 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:19:07,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:19:07,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:19:07,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:19:07,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:19:07,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:19:07,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:19:07,910 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:19:07,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:19:07,910 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:19:07,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:19:07,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:19:07,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:19:07,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:19:07,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:19:07,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:19:07,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:19:07,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:19:07,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:19:07,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:19:07,912 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:19:07,912 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:19:07,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:19:07,913 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca [2022-07-21 09:19:08,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:19:08,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:19:08,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:19:08,213 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:19:08,214 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:19:08,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2022-07-21 09:19:08,263 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2b834470/c4aee95f7352414b9e8ceeb3f2b2de1a/FLAGbeab9e7f1 [2022-07-21 09:19:08,657 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:19:08,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2022-07-21 09:19:08,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2b834470/c4aee95f7352414b9e8ceeb3f2b2de1a/FLAGbeab9e7f1 [2022-07-21 09:19:08,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2b834470/c4aee95f7352414b9e8ceeb3f2b2de1a [2022-07-21 09:19:08,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:19:08,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:19:08,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:19:08,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:19:08,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:19:08,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:19:08" (1/1) ... [2022-07-21 09:19:08,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b860d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:19:08, skipping insertion in model container [2022-07-21 09:19:08,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:19:08" (1/1) ... [2022-07-21 09:19:08,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:19:08,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:19:08,872 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/unroll-cond-2.wvr.c[2474,2487] [2022-07-21 09:19:08,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:19:08,903 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:19:08,933 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/unroll-cond-2.wvr.c[2474,2487] [2022-07-21 09:19:08,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:19:08,948 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:19:08,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:19:08 WrapperNode [2022-07-21 09:19:08,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:19:08,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:19:08,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:19:08,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:19:08,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:19:08" (1/1) ... [2022-07-21 09:19:08,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:19:08" (1/1) ... [2022-07-21 09:19:08,991 INFO L137 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 141 [2022-07-21 09:19:08,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:19:08,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:19:08,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:19:08,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:19:08,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:19:08" (1/1) ... [2022-07-21 09:19:08,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:19:08" (1/1) ... [2022-07-21 09:19:09,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:19:08" (1/1) ... [2022-07-21 09:19:09,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:19:08" (1/1) ... [2022-07-21 09:19:09,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:19:08" (1/1) ... [2022-07-21 09:19:09,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:19:08" (1/1) ... [2022-07-21 09:19:09,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:19:08" (1/1) ... [2022-07-21 09:19:09,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:19:09,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:19:09,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:19:09,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:19:09,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:19:08" (1/1) ... [2022-07-21 09:19:09,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:19:09,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:09,077 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) [2022-07-21 09:19:09,093 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 [2022-07-21 09:19:09,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:19:09,123 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:19:09,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:19:09,123 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:19:09,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:19:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:19:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:19:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:19:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:19:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:19:09,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:19:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:19:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:19:09,126 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:19:09,181 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:19:09,182 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:19:09,416 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:19:09,422 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:19:09,423 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 09:19:09,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:19:09 BoogieIcfgContainer [2022-07-21 09:19:09,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:19:09,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:19:09,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:19:09,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:19:09,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:19:08" (1/3) ... [2022-07-21 09:19:09,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c16af6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:19:09, skipping insertion in model container [2022-07-21 09:19:09,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:19:08" (2/3) ... [2022-07-21 09:19:09,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c16af6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:19:09, skipping insertion in model container [2022-07-21 09:19:09,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:19:09" (3/3) ... [2022-07-21 09:19:09,430 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2022-07-21 09:19:09,433 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:19:09,465 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:19:09,466 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:19:09,466 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:19:09,554 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:19:09,588 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 171 places, 179 transitions, 374 flow [2022-07-21 09:19:09,675 INFO L129 PetriNetUnfolder]: 15/177 cut-off events. [2022-07-21 09:19:09,676 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:19:09,679 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 15/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 223 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2022-07-21 09:19:09,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 179 transitions, 374 flow [2022-07-21 09:19:09,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 168 transitions, 348 flow [2022-07-21 09:19:09,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:19:09,695 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@76571814, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5217c803 [2022-07-21 09:19:09,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:19:09,715 INFO L129 PetriNetUnfolder]: 14/165 cut-off events. [2022-07-21 09:19:09,715 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:19:09,715 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:09,716 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:09,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:09,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:09,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2050850175, now seen corresponding path program 1 times [2022-07-21 09:19:09,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:09,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157884827] [2022-07-21 09:19:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:09,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:09,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:09,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157884827] [2022-07-21 09:19:09,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157884827] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:09,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:09,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:19:09,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516146615] [2022-07-21 09:19:09,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:09,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:19:09,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:09,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:19:09,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:19:09,973 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 179 [2022-07-21 09:19:09,977 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 168 transitions, 348 flow. Second operand has 2 states, 2 states have (on average 166.0) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:09,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:09,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 179 [2022-07-21 09:19:09,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:10,029 INFO L129 PetriNetUnfolder]: 4/157 cut-off events. [2022-07-21 09:19:10,029 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-21 09:19:10,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 157 events. 4/157 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 202 event pairs, 0 based on Foata normal form. 14/159 useless extension candidates. Maximal degree in co-relation 97. Up to 5 conditions per place. [2022-07-21 09:19:10,032 INFO L132 encePairwiseOnDemand]: 168/179 looper letters, 4 selfloop transitions, 0 changer transitions 4/157 dead transitions. [2022-07-21 09:19:10,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 157 transitions, 334 flow [2022-07-21 09:19:10,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:19:10,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:19:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 341 transitions. [2022-07-21 09:19:10,046 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.952513966480447 [2022-07-21 09:19:10,047 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 341 transitions. [2022-07-21 09:19:10,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 341 transitions. [2022-07-21 09:19:10,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:10,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 341 transitions. [2022-07-21 09:19:10,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 170.5) internal successors, (341), 2 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:10,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:10,058 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:10,059 INFO L186 Difference]: Start difference. First operand has 160 places, 168 transitions, 348 flow. Second operand 2 states and 341 transitions. [2022-07-21 09:19:10,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 157 transitions, 334 flow [2022-07-21 09:19:10,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 157 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:19:10,068 INFO L242 Difference]: Finished difference. Result has 157 places, 153 transitions, 310 flow [2022-07-21 09:19:10,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=310, PETRI_PLACES=157, PETRI_TRANSITIONS=153} [2022-07-21 09:19:10,074 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, -3 predicate places. [2022-07-21 09:19:10,074 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 153 transitions, 310 flow [2022-07-21 09:19:10,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 166.0) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:10,075 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:10,076 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:10,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:19:10,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:10,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1248426905, now seen corresponding path program 1 times [2022-07-21 09:19:10,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:10,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947704009] [2022-07-21 09:19:10,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:10,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:10,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:10,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947704009] [2022-07-21 09:19:10,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947704009] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:10,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:10,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:19:10,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531805029] [2022-07-21 09:19:10,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:10,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:19:10,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:10,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:19:10,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:19:10,317 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 179 [2022-07-21 09:19:10,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 153 transitions, 310 flow. Second operand has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:10,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:10,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 179 [2022-07-21 09:19:10,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:10,429 INFO L129 PetriNetUnfolder]: 105/567 cut-off events. [2022-07-21 09:19:10,429 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-21 09:19:10,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 567 events. 105/567 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2597 event pairs, 29 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 753. Up to 111 conditions per place. [2022-07-21 09:19:10,434 INFO L132 encePairwiseOnDemand]: 173/179 looper letters, 30 selfloop transitions, 6 changer transitions 0/170 dead transitions. [2022-07-21 09:19:10,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 170 transitions, 418 flow [2022-07-21 09:19:10,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:19:10,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:19:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 629 transitions. [2022-07-21 09:19:10,437 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8784916201117319 [2022-07-21 09:19:10,438 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 629 transitions. [2022-07-21 09:19:10,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 629 transitions. [2022-07-21 09:19:10,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:10,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 629 transitions. [2022-07-21 09:19:10,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:10,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:10,443 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:10,443 INFO L186 Difference]: Start difference. First operand has 157 places, 153 transitions, 310 flow. Second operand 4 states and 629 transitions. [2022-07-21 09:19:10,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 170 transitions, 418 flow [2022-07-21 09:19:10,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 170 transitions, 418 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:19:10,449 INFO L242 Difference]: Finished difference. Result has 158 places, 158 transitions, 350 flow [2022-07-21 09:19:10,450 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=158, PETRI_TRANSITIONS=158} [2022-07-21 09:19:10,450 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, -2 predicate places. [2022-07-21 09:19:10,450 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 158 transitions, 350 flow [2022-07-21 09:19:10,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:10,451 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:10,452 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:10,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:19:10,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:10,453 INFO L85 PathProgramCache]: Analyzing trace with hash -5255025, now seen corresponding path program 1 times [2022-07-21 09:19:10,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:10,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218986190] [2022-07-21 09:19:10,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:10,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:10,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:10,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218986190] [2022-07-21 09:19:10,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218986190] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:10,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:10,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:19:10,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188198763] [2022-07-21 09:19:10,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:10,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:19:10,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:10,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:19:10,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:19:10,597 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-21 09:19:10,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 158 transitions, 350 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:10,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:10,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-21 09:19:10,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:10,795 INFO L129 PetriNetUnfolder]: 236/1284 cut-off events. [2022-07-21 09:19:10,795 INFO L130 PetriNetUnfolder]: For 130/132 co-relation queries the response was YES. [2022-07-21 09:19:10,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1940 conditions, 1284 events. 236/1284 cut-off events. For 130/132 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 8717 event pairs, 108 based on Foata normal form. 6/1205 useless extension candidates. Maximal degree in co-relation 1934. Up to 256 conditions per place. [2022-07-21 09:19:10,803 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 60 selfloop transitions, 7 changer transitions 1/199 dead transitions. [2022-07-21 09:19:10,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 199 transitions, 627 flow [2022-07-21 09:19:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:19:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:19:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 927 transitions. [2022-07-21 09:19:10,806 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8631284916201117 [2022-07-21 09:19:10,806 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 927 transitions. [2022-07-21 09:19:10,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 927 transitions. [2022-07-21 09:19:10,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:10,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 927 transitions. [2022-07-21 09:19:10,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.5) internal successors, (927), 6 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:10,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:10,810 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:10,811 INFO L186 Difference]: Start difference. First operand has 158 places, 158 transitions, 350 flow. Second operand 6 states and 927 transitions. [2022-07-21 09:19:10,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 199 transitions, 627 flow [2022-07-21 09:19:10,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 199 transitions, 627 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:19:10,817 INFO L242 Difference]: Finished difference. Result has 166 places, 162 transitions, 398 flow [2022-07-21 09:19:10,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=398, PETRI_PLACES=166, PETRI_TRANSITIONS=162} [2022-07-21 09:19:10,819 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 6 predicate places. [2022-07-21 09:19:10,819 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 162 transitions, 398 flow [2022-07-21 09:19:10,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:10,820 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:10,820 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:10,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:19:10,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:10,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:10,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1123750283, now seen corresponding path program 2 times [2022-07-21 09:19:10,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:10,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200754462] [2022-07-21 09:19:10,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:10,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:11,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:11,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200754462] [2022-07-21 09:19:11,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200754462] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:11,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:11,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:19:11,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591918213] [2022-07-21 09:19:11,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:11,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:19:11,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:11,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:19:11,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:19:11,030 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-21 09:19:11,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 162 transitions, 398 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:11,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:11,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-21 09:19:11,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:11,241 INFO L129 PetriNetUnfolder]: 264/1409 cut-off events. [2022-07-21 09:19:11,241 INFO L130 PetriNetUnfolder]: For 392/404 co-relation queries the response was YES. [2022-07-21 09:19:11,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2375 conditions, 1409 events. 264/1409 cut-off events. For 392/404 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 9977 event pairs, 114 based on Foata normal form. 4/1316 useless extension candidates. Maximal degree in co-relation 2365. Up to 263 conditions per place. [2022-07-21 09:19:11,247 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 59 selfloop transitions, 12 changer transitions 1/203 dead transitions. [2022-07-21 09:19:11,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 203 transitions, 704 flow [2022-07-21 09:19:11,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:19:11,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:19:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 786 transitions. [2022-07-21 09:19:11,249 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8782122905027933 [2022-07-21 09:19:11,250 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 786 transitions. [2022-07-21 09:19:11,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 786 transitions. [2022-07-21 09:19:11,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:11,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 786 transitions. [2022-07-21 09:19:11,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:11,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:11,253 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:11,254 INFO L186 Difference]: Start difference. First operand has 166 places, 162 transitions, 398 flow. Second operand 5 states and 786 transitions. [2022-07-21 09:19:11,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 203 transitions, 704 flow [2022-07-21 09:19:11,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 203 transitions, 696 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 09:19:11,258 INFO L242 Difference]: Finished difference. Result has 171 places, 170 transitions, 496 flow [2022-07-21 09:19:11,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=171, PETRI_TRANSITIONS=170} [2022-07-21 09:19:11,259 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 11 predicate places. [2022-07-21 09:19:11,259 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 170 transitions, 496 flow [2022-07-21 09:19:11,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:11,260 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:11,260 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:11,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:19:11,260 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:11,261 INFO L85 PathProgramCache]: Analyzing trace with hash 561552515, now seen corresponding path program 3 times [2022-07-21 09:19:11,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:11,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555717223] [2022-07-21 09:19:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:11,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:11,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:11,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555717223] [2022-07-21 09:19:11,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555717223] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:11,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:11,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:19:11,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279803571] [2022-07-21 09:19:11,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:11,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:19:11,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:11,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:19:11,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:19:11,370 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-21 09:19:11,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 170 transitions, 496 flow. Second operand has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:11,371 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:11,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-21 09:19:11,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:11,566 INFO L129 PetriNetUnfolder]: 268/1401 cut-off events. [2022-07-21 09:19:11,566 INFO L130 PetriNetUnfolder]: For 760/768 co-relation queries the response was YES. [2022-07-21 09:19:11,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2545 conditions, 1401 events. 268/1401 cut-off events. For 760/768 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 9855 event pairs, 101 based on Foata normal form. 6/1312 useless extension candidates. Maximal degree in co-relation 2532. Up to 263 conditions per place. [2022-07-21 09:19:11,584 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 69 selfloop transitions, 17 changer transitions 1/218 dead transitions. [2022-07-21 09:19:11,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 218 transitions, 872 flow [2022-07-21 09:19:11,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:19:11,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:19:11,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 942 transitions. [2022-07-21 09:19:11,587 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8770949720670391 [2022-07-21 09:19:11,587 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 942 transitions. [2022-07-21 09:19:11,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 942 transitions. [2022-07-21 09:19:11,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:11,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 942 transitions. [2022-07-21 09:19:11,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:11,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:11,592 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:11,592 INFO L186 Difference]: Start difference. First operand has 171 places, 170 transitions, 496 flow. Second operand 6 states and 942 transitions. [2022-07-21 09:19:11,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 218 transitions, 872 flow [2022-07-21 09:19:11,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 218 transitions, 860 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-07-21 09:19:11,598 INFO L242 Difference]: Finished difference. Result has 178 places, 176 transitions, 604 flow [2022-07-21 09:19:11,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=604, PETRI_PLACES=178, PETRI_TRANSITIONS=176} [2022-07-21 09:19:11,600 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 18 predicate places. [2022-07-21 09:19:11,600 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 176 transitions, 604 flow [2022-07-21 09:19:11,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:11,601 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:11,601 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:11,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:19:11,602 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:11,602 INFO L85 PathProgramCache]: Analyzing trace with hash -571169239, now seen corresponding path program 4 times [2022-07-21 09:19:11,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:11,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206559358] [2022-07-21 09:19:11,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:11,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:11,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:11,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206559358] [2022-07-21 09:19:11,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206559358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:11,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:11,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:19:11,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246369485] [2022-07-21 09:19:11,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:11,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:19:11,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:11,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:19:11,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:19:11,767 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-21 09:19:11,767 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 176 transitions, 604 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:11,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:11,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-21 09:19:11,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:11,995 INFO L129 PetriNetUnfolder]: 274/1480 cut-off events. [2022-07-21 09:19:11,995 INFO L130 PetriNetUnfolder]: For 1256/1258 co-relation queries the response was YES. [2022-07-21 09:19:11,998 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2852 conditions, 1480 events. 274/1480 cut-off events. For 1256/1258 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 10598 event pairs, 100 based on Foata normal form. 6/1387 useless extension candidates. Maximal degree in co-relation 2836. Up to 292 conditions per place. [2022-07-21 09:19:12,003 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 63 selfloop transitions, 23 changer transitions 1/218 dead transitions. [2022-07-21 09:19:12,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 218 transitions, 1002 flow [2022-07-21 09:19:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:19:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:19:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1076 transitions. [2022-07-21 09:19:12,005 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8587390263367917 [2022-07-21 09:19:12,005 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1076 transitions. [2022-07-21 09:19:12,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1076 transitions. [2022-07-21 09:19:12,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:12,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1076 transitions. [2022-07-21 09:19:12,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:12,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:12,009 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:12,009 INFO L186 Difference]: Start difference. First operand has 178 places, 176 transitions, 604 flow. Second operand 7 states and 1076 transitions. [2022-07-21 09:19:12,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 218 transitions, 1002 flow [2022-07-21 09:19:12,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 218 transitions, 975 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 09:19:12,017 INFO L242 Difference]: Finished difference. Result has 186 places, 181 transitions, 699 flow [2022-07-21 09:19:12,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=699, PETRI_PLACES=186, PETRI_TRANSITIONS=181} [2022-07-21 09:19:12,019 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 26 predicate places. [2022-07-21 09:19:12,019 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 181 transitions, 699 flow [2022-07-21 09:19:12,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:12,020 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:12,020 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:12,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:19:12,020 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:12,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:12,021 INFO L85 PathProgramCache]: Analyzing trace with hash -831138031, now seen corresponding path program 5 times [2022-07-21 09:19:12,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:12,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134997203] [2022-07-21 09:19:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:12,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:12,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:12,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134997203] [2022-07-21 09:19:12,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134997203] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:12,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:12,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:19:12,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312550350] [2022-07-21 09:19:12,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:12,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:19:12,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:12,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:19:12,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:19:12,155 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-21 09:19:12,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 181 transitions, 699 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:12,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:12,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-21 09:19:12,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:12,393 INFO L129 PetriNetUnfolder]: 274/1433 cut-off events. [2022-07-21 09:19:12,393 INFO L130 PetriNetUnfolder]: For 1948/1948 co-relation queries the response was YES. [2022-07-21 09:19:12,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2979 conditions, 1433 events. 274/1433 cut-off events. For 1948/1948 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 10116 event pairs, 102 based on Foata normal form. 3/1337 useless extension candidates. Maximal degree in co-relation 2959. Up to 207 conditions per place. [2022-07-21 09:19:12,401 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 71 selfloop transitions, 30 changer transitions 1/233 dead transitions. [2022-07-21 09:19:12,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 233 transitions, 1184 flow [2022-07-21 09:19:12,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:19:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:19:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1235 transitions. [2022-07-21 09:19:12,404 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8624301675977654 [2022-07-21 09:19:12,404 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1235 transitions. [2022-07-21 09:19:12,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1235 transitions. [2022-07-21 09:19:12,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:12,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1235 transitions. [2022-07-21 09:19:12,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:12,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:12,409 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:12,409 INFO L186 Difference]: Start difference. First operand has 186 places, 181 transitions, 699 flow. Second operand 8 states and 1235 transitions. [2022-07-21 09:19:12,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 233 transitions, 1184 flow [2022-07-21 09:19:12,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 233 transitions, 1138 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-21 09:19:12,420 INFO L242 Difference]: Finished difference. Result has 193 places, 189 transitions, 825 flow [2022-07-21 09:19:12,420 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=825, PETRI_PLACES=193, PETRI_TRANSITIONS=189} [2022-07-21 09:19:12,421 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 33 predicate places. [2022-07-21 09:19:12,421 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 189 transitions, 825 flow [2022-07-21 09:19:12,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:12,422 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:12,422 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:12,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:19:12,423 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:12,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2068674478, now seen corresponding path program 1 times [2022-07-21 09:19:12,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:12,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358988270] [2022-07-21 09:19:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:12,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:12,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:12,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358988270] [2022-07-21 09:19:12,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358988270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:12,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:12,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:19:12,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996094090] [2022-07-21 09:19:12,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:12,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:19:12,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:12,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:19:12,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:19:12,538 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 179 [2022-07-21 09:19:12,540 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 189 transitions, 825 flow. Second operand has 8 states, 8 states have (on average 130.75) internal successors, (1046), 8 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:12,540 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:12,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 179 [2022-07-21 09:19:12,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:12,675 INFO L129 PetriNetUnfolder]: 108/1092 cut-off events. [2022-07-21 09:19:12,675 INFO L130 PetriNetUnfolder]: For 1018/1051 co-relation queries the response was YES. [2022-07-21 09:19:12,679 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 1092 events. 108/1092 cut-off events. For 1018/1051 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7584 event pairs, 35 based on Foata normal form. 9/1023 useless extension candidates. Maximal degree in co-relation 1842. Up to 145 conditions per place. [2022-07-21 09:19:12,682 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 33 selfloop transitions, 7 changer transitions 0/193 dead transitions. [2022-07-21 09:19:12,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 193 transitions, 913 flow [2022-07-21 09:19:12,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:19:12,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:19:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1057 transitions. [2022-07-21 09:19:12,684 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7381284916201117 [2022-07-21 09:19:12,685 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1057 transitions. [2022-07-21 09:19:12,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1057 transitions. [2022-07-21 09:19:12,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:12,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1057 transitions. [2022-07-21 09:19:12,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.125) internal successors, (1057), 8 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:12,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:12,706 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:12,706 INFO L186 Difference]: Start difference. First operand has 193 places, 189 transitions, 825 flow. Second operand 8 states and 1057 transitions. [2022-07-21 09:19:12,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 193 transitions, 913 flow [2022-07-21 09:19:12,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 193 transitions, 881 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-07-21 09:19:12,712 INFO L242 Difference]: Finished difference. Result has 198 places, 190 transitions, 815 flow [2022-07-21 09:19:12,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=815, PETRI_PLACES=198, PETRI_TRANSITIONS=190} [2022-07-21 09:19:12,713 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 38 predicate places. [2022-07-21 09:19:12,713 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 190 transitions, 815 flow [2022-07-21 09:19:12,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.75) internal successors, (1046), 8 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:12,714 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:12,714 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:12,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:19:12,715 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:12,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:12,715 INFO L85 PathProgramCache]: Analyzing trace with hash -721032061, now seen corresponding path program 1 times [2022-07-21 09:19:12,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:12,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037392105] [2022-07-21 09:19:12,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:12,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:12,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:12,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037392105] [2022-07-21 09:19:12,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037392105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:12,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800460132] [2022-07-21 09:19:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:12,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:12,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:12,900 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) [2022-07-21 09:19:12,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:19:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:12,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 09:19:13,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:13,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:19:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:13,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:13,428 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:19:13,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-21 09:19:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:19:13,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800460132] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:13,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:19:13,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 17 [2022-07-21 09:19:13,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746016136] [2022-07-21 09:19:13,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:13,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:19:13,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:13,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:19:13,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:19:13,506 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-07-21 09:19:13,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 190 transitions, 815 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:13,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:13,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-07-21 09:19:13,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:14,022 INFO L129 PetriNetUnfolder]: 1161/4104 cut-off events. [2022-07-21 09:19:14,022 INFO L130 PetriNetUnfolder]: For 2401/2464 co-relation queries the response was YES. [2022-07-21 09:19:14,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7549 conditions, 4104 events. 1161/4104 cut-off events. For 2401/2464 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 36225 event pairs, 340 based on Foata normal form. 22/3877 useless extension candidates. Maximal degree in co-relation 7526. Up to 998 conditions per place. [2022-07-21 09:19:14,044 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 90 selfloop transitions, 18 changer transitions 4/257 dead transitions. [2022-07-21 09:19:14,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 257 transitions, 1179 flow [2022-07-21 09:19:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:19:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 09:19:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1647 transitions. [2022-07-21 09:19:14,048 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7077782552642888 [2022-07-21 09:19:14,048 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1647 transitions. [2022-07-21 09:19:14,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1647 transitions. [2022-07-21 09:19:14,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:14,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1647 transitions. [2022-07-21 09:19:14,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 126.6923076923077) internal successors, (1647), 13 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:14,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 179.0) internal successors, (2506), 14 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:14,055 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 179.0) internal successors, (2506), 14 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:14,055 INFO L186 Difference]: Start difference. First operand has 198 places, 190 transitions, 815 flow. Second operand 13 states and 1647 transitions. [2022-07-21 09:19:14,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 257 transitions, 1179 flow [2022-07-21 09:19:14,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 257 transitions, 1167 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 09:19:14,067 INFO L242 Difference]: Finished difference. Result has 213 places, 206 transitions, 917 flow [2022-07-21 09:19:14,067 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=917, PETRI_PLACES=213, PETRI_TRANSITIONS=206} [2022-07-21 09:19:14,068 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 53 predicate places. [2022-07-21 09:19:14,068 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 206 transitions, 917 flow [2022-07-21 09:19:14,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:14,069 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:14,069 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:14,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:19:14,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:14,286 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:14,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:14,286 INFO L85 PathProgramCache]: Analyzing trace with hash -278354083, now seen corresponding path program 1 times [2022-07-21 09:19:14,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:14,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844525896] [2022-07-21 09:19:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:14,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:14,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844525896] [2022-07-21 09:19:14,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844525896] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182047939] [2022-07-21 09:19:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:14,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:14,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:14,446 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) [2022-07-21 09:19:14,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:19:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:14,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 09:19:14,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:15,077 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 09:19:15,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2022-07-21 09:19:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:15,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:15,338 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:19:15,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-07-21 09:19:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:16,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182047939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:16,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:16,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 19] total 38 [2022-07-21 09:19:16,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376794576] [2022-07-21 09:19:16,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:16,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 09:19:16,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:16,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 09:19:16,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 09:19:16,292 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 179 [2022-07-21 09:19:16,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 206 transitions, 917 flow. Second operand has 38 states, 38 states have (on average 79.10526315789474) internal successors, (3006), 38 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:16,295 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:16,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 179 [2022-07-21 09:19:16,295 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:22,282 INFO L129 PetriNetUnfolder]: 6270/13936 cut-off events. [2022-07-21 09:19:22,282 INFO L130 PetriNetUnfolder]: For 22916/22944 co-relation queries the response was YES. [2022-07-21 09:19:22,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36233 conditions, 13936 events. 6270/13936 cut-off events. For 22916/22944 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 129940 event pairs, 505 based on Foata normal form. 23/13268 useless extension candidates. Maximal degree in co-relation 36201. Up to 3004 conditions per place. [2022-07-21 09:19:22,386 INFO L132 encePairwiseOnDemand]: 133/179 looper letters, 515 selfloop transitions, 112 changer transitions 284/978 dead transitions. [2022-07-21 09:19:22,387 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 978 transitions, 5891 flow [2022-07-21 09:19:22,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-21 09:19:22,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-07-21 09:19:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 7546 transitions. [2022-07-21 09:19:22,401 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.46325741297808337 [2022-07-21 09:19:22,401 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 7546 transitions. [2022-07-21 09:19:22,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 7546 transitions. [2022-07-21 09:19:22,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:22,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 7546 transitions. [2022-07-21 09:19:22,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 82.92307692307692) internal successors, (7546), 91 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:22,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 179.0) internal successors, (16468), 92 states have internal predecessors, (16468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:22,451 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 179.0) internal successors, (16468), 92 states have internal predecessors, (16468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:22,451 INFO L186 Difference]: Start difference. First operand has 213 places, 206 transitions, 917 flow. Second operand 91 states and 7546 transitions. [2022-07-21 09:19:22,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 978 transitions, 5891 flow [2022-07-21 09:19:22,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 978 transitions, 5881 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-07-21 09:19:22,520 INFO L242 Difference]: Finished difference. Result has 353 places, 283 transitions, 1794 flow [2022-07-21 09:19:22,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=1794, PETRI_PLACES=353, PETRI_TRANSITIONS=283} [2022-07-21 09:19:22,521 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 193 predicate places. [2022-07-21 09:19:22,521 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 283 transitions, 1794 flow [2022-07-21 09:19:22,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 79.10526315789474) internal successors, (3006), 38 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:22,522 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:22,522 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:22,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:19:22,735 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,SelfDestructingSolverStorable9 [2022-07-21 09:19:22,736 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:22,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:22,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1230727617, now seen corresponding path program 2 times [2022-07-21 09:19:22,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:22,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714135225] [2022-07-21 09:19:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:22,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:22,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:22,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714135225] [2022-07-21 09:19:22,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714135225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:22,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071492746] [2022-07-21 09:19:22,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:19:22,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:22,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:22,973 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:19:22,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:19:23,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:19:23,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:23,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 09:19:23,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:23,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:19:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:23,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:23,430 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:19:23,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-21 09:19:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:19:23,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071492746] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:23,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:19:23,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 17 [2022-07-21 09:19:23,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851475293] [2022-07-21 09:19:23,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:23,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:19:23,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:23,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:19:23,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:19:23,512 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-07-21 09:19:23,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 283 transitions, 1794 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:23,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:23,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-07-21 09:19:23,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:24,723 INFO L129 PetriNetUnfolder]: 1913/6501 cut-off events. [2022-07-21 09:19:24,723 INFO L130 PetriNetUnfolder]: For 18173/18594 co-relation queries the response was YES. [2022-07-21 09:19:24,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19543 conditions, 6501 events. 1913/6501 cut-off events. For 18173/18594 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 63645 event pairs, 342 based on Foata normal form. 42/6314 useless extension candidates. Maximal degree in co-relation 19458. Up to 1115 conditions per place. [2022-07-21 09:19:24,804 INFO L132 encePairwiseOnDemand]: 166/179 looper letters, 130 selfloop transitions, 64 changer transitions 9/395 dead transitions. [2022-07-21 09:19:24,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 395 transitions, 2731 flow [2022-07-21 09:19:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 09:19:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 09:19:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1926 transitions. [2022-07-21 09:19:24,811 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.71731843575419 [2022-07-21 09:19:24,811 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1926 transitions. [2022-07-21 09:19:24,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1926 transitions. [2022-07-21 09:19:24,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:24,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1926 transitions. [2022-07-21 09:19:24,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 128.4) internal successors, (1926), 15 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:24,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:24,830 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:24,830 INFO L186 Difference]: Start difference. First operand has 353 places, 283 transitions, 1794 flow. Second operand 15 states and 1926 transitions. [2022-07-21 09:19:24,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 395 transitions, 2731 flow [2022-07-21 09:19:24,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 395 transitions, 2481 flow, removed 98 selfloop flow, removed 35 redundant places. [2022-07-21 09:19:24,933 INFO L242 Difference]: Finished difference. Result has 295 places, 318 transitions, 2031 flow [2022-07-21 09:19:24,933 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2031, PETRI_PLACES=295, PETRI_TRANSITIONS=318} [2022-07-21 09:19:24,934 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 135 predicate places. [2022-07-21 09:19:24,934 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 318 transitions, 2031 flow [2022-07-21 09:19:24,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:24,934 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:24,934 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:24,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:19:25,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:25,164 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:25,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:25,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1485343311, now seen corresponding path program 3 times [2022-07-21 09:19:25,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:25,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132405646] [2022-07-21 09:19:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:25,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:25,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:25,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132405646] [2022-07-21 09:19:25,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132405646] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:25,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226622079] [2022-07-21 09:19:25,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:19:25,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:25,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:25,347 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) [2022-07-21 09:19:25,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:19:25,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:19:25,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:25,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 09:19:25,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:25,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:19:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:25,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:25,734 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:19:25,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-21 09:19:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:19:25,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226622079] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:25,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:19:25,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2022-07-21 09:19:25,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443198520] [2022-07-21 09:19:25,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:25,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:19:25,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:25,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:19:25,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:19:25,820 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-07-21 09:19:25,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 318 transitions, 2031 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:25,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:25,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-07-21 09:19:25,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:26,932 INFO L129 PetriNetUnfolder]: 2036/6945 cut-off events. [2022-07-21 09:19:26,933 INFO L130 PetriNetUnfolder]: For 15185/15440 co-relation queries the response was YES. [2022-07-21 09:19:26,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21065 conditions, 6945 events. 2036/6945 cut-off events. For 15185/15440 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 69067 event pairs, 444 based on Foata normal form. 51/6730 useless extension candidates. Maximal degree in co-relation 20997. Up to 1614 conditions per place. [2022-07-21 09:19:26,991 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 133 selfloop transitions, 66 changer transitions 4/395 dead transitions. [2022-07-21 09:19:26,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 395 transitions, 2847 flow [2022-07-21 09:19:26,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 09:19:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 09:19:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1899 transitions. [2022-07-21 09:19:26,993 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7072625698324022 [2022-07-21 09:19:26,994 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1899 transitions. [2022-07-21 09:19:26,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1899 transitions. [2022-07-21 09:19:26,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:26,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1899 transitions. [2022-07-21 09:19:26,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 126.6) internal successors, (1899), 15 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:26,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:26,998 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:26,998 INFO L186 Difference]: Start difference. First operand has 295 places, 318 transitions, 2031 flow. Second operand 15 states and 1899 transitions. [2022-07-21 09:19:26,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 395 transitions, 2847 flow [2022-07-21 09:19:27,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 395 transitions, 2746 flow, removed 43 selfloop flow, removed 3 redundant places. [2022-07-21 09:19:27,181 INFO L242 Difference]: Finished difference. Result has 311 places, 341 transitions, 2331 flow [2022-07-21 09:19:27,181 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2331, PETRI_PLACES=311, PETRI_TRANSITIONS=341} [2022-07-21 09:19:27,182 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 151 predicate places. [2022-07-21 09:19:27,183 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 341 transitions, 2331 flow [2022-07-21 09:19:27,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:27,183 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:27,183 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:27,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-21 09:19:27,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:27,416 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:27,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1461858045, now seen corresponding path program 4 times [2022-07-21 09:19:27,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:27,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720719951] [2022-07-21 09:19:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:27,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:27,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:27,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720719951] [2022-07-21 09:19:27,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720719951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:27,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310189298] [2022-07-21 09:19:27,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:19:27,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:27,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:27,570 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) [2022-07-21 09:19:27,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:19:27,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:19:27,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:27,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 09:19:27,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:27,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 09:19:28,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:19:28,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:19:28,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:19:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:28,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:28,509 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:19:28,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-07-21 09:19:28,515 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:19:28,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 85 [2022-07-21 09:19:28,520 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-21 09:19:28,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 54 [2022-07-21 09:19:28,526 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-21 09:19:28,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2022-07-21 09:19:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:28,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310189298] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:28,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:28,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 31 [2022-07-21 09:19:28,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060280370] [2022-07-21 09:19:28,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:28,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 09:19:28,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:28,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 09:19:28,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=674, Unknown=46, NotChecked=0, Total=930 [2022-07-21 09:19:28,587 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 179 [2022-07-21 09:19:28,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 341 transitions, 2331 flow. Second operand has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:28,589 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:28,589 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 179 [2022-07-21 09:19:28,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:30,293 INFO L129 PetriNetUnfolder]: 2155/7266 cut-off events. [2022-07-21 09:19:30,294 INFO L130 PetriNetUnfolder]: For 18546/18807 co-relation queries the response was YES. [2022-07-21 09:19:30,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23024 conditions, 7266 events. 2155/7266 cut-off events. For 18546/18807 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 72920 event pairs, 445 based on Foata normal form. 50/7054 useless extension candidates. Maximal degree in co-relation 22951. Up to 1637 conditions per place. [2022-07-21 09:19:30,500 INFO L132 encePairwiseOnDemand]: 155/179 looper letters, 168 selfloop transitions, 102 changer transitions 4/444 dead transitions. [2022-07-21 09:19:30,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 444 transitions, 3497 flow [2022-07-21 09:19:30,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:19:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:19:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3183 transitions. [2022-07-21 09:19:30,518 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5736168679041269 [2022-07-21 09:19:30,518 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3183 transitions. [2022-07-21 09:19:30,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3183 transitions. [2022-07-21 09:19:30,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:30,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3183 transitions. [2022-07-21 09:19:30,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 102.6774193548387) internal successors, (3183), 31 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:30,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:30,526 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:30,526 INFO L186 Difference]: Start difference. First operand has 311 places, 341 transitions, 2331 flow. Second operand 31 states and 3183 transitions. [2022-07-21 09:19:30,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 444 transitions, 3497 flow [2022-07-21 09:19:30,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 444 transitions, 3379 flow, removed 39 selfloop flow, removed 5 redundant places. [2022-07-21 09:19:30,634 INFO L242 Difference]: Finished difference. Result has 343 places, 378 transitions, 2903 flow [2022-07-21 09:19:30,634 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2903, PETRI_PLACES=343, PETRI_TRANSITIONS=378} [2022-07-21 09:19:30,635 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 183 predicate places. [2022-07-21 09:19:30,635 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 378 transitions, 2903 flow [2022-07-21 09:19:30,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:30,636 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:30,636 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:30,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:19:30,852 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,SelfDestructingSolverStorable12 [2022-07-21 09:19:30,853 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:30,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:30,853 INFO L85 PathProgramCache]: Analyzing trace with hash -539667915, now seen corresponding path program 5 times [2022-07-21 09:19:30,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:30,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283385954] [2022-07-21 09:19:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:30,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:31,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:31,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283385954] [2022-07-21 09:19:31,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283385954] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:31,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367200268] [2022-07-21 09:19:31,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:19:31,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:31,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:31,028 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) [2022-07-21 09:19:31,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:19:31,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:19:31,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:31,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 09:19:31,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:31,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 09:19:31,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:19:31,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:19:31,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:19:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:31,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:31,985 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:19:31,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-07-21 09:19:31,992 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:19:31,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 85 [2022-07-21 09:19:31,998 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-21 09:19:31,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 54 [2022-07-21 09:19:32,004 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-21 09:19:32,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2022-07-21 09:19:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:32,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367200268] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:32,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:32,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 31 [2022-07-21 09:19:32,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930242764] [2022-07-21 09:19:32,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:32,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 09:19:32,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:32,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 09:19:32,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=671, Unknown=49, NotChecked=0, Total=930 [2022-07-21 09:19:32,078 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 179 [2022-07-21 09:19:32,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 378 transitions, 2903 flow. Second operand has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:32,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:32,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 179 [2022-07-21 09:19:32,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:33,861 INFO L129 PetriNetUnfolder]: 2174/7381 cut-off events. [2022-07-21 09:19:33,862 INFO L130 PetriNetUnfolder]: For 22812/23134 co-relation queries the response was YES. [2022-07-21 09:19:33,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24821 conditions, 7381 events. 2174/7381 cut-off events. For 22812/23134 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 74601 event pairs, 460 based on Foata normal form. 58/7161 useless extension candidates. Maximal degree in co-relation 24741. Up to 1718 conditions per place. [2022-07-21 09:19:33,923 INFO L132 encePairwiseOnDemand]: 155/179 looper letters, 174 selfloop transitions, 96 changer transitions 4/444 dead transitions. [2022-07-21 09:19:33,923 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 444 transitions, 3787 flow [2022-07-21 09:19:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 09:19:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-21 09:19:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2971 transitions. [2022-07-21 09:19:33,926 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5723367366596032 [2022-07-21 09:19:33,926 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2971 transitions. [2022-07-21 09:19:33,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2971 transitions. [2022-07-21 09:19:33,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:33,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2971 transitions. [2022-07-21 09:19:33,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 102.44827586206897) internal successors, (2971), 29 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:33,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 179.0) internal successors, (5370), 30 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:33,933 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 179.0) internal successors, (5370), 30 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:33,933 INFO L186 Difference]: Start difference. First operand has 343 places, 378 transitions, 2903 flow. Second operand 29 states and 2971 transitions. [2022-07-21 09:19:33,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 444 transitions, 3787 flow [2022-07-21 09:19:34,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 444 transitions, 3499 flow, removed 116 selfloop flow, removed 13 redundant places. [2022-07-21 09:19:34,044 INFO L242 Difference]: Finished difference. Result has 360 places, 385 transitions, 2929 flow [2022-07-21 09:19:34,044 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2636, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2929, PETRI_PLACES=360, PETRI_TRANSITIONS=385} [2022-07-21 09:19:34,045 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 200 predicate places. [2022-07-21 09:19:34,045 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 385 transitions, 2929 flow [2022-07-21 09:19:34,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:34,046 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:34,046 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:34,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:19:34,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:34,260 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash -729450221, now seen corresponding path program 6 times [2022-07-21 09:19:34,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:34,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379458328] [2022-07-21 09:19:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:34,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:34,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:34,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379458328] [2022-07-21 09:19:34,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379458328] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:34,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781579142] [2022-07-21 09:19:34,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:19:34,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:34,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:34,455 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) [2022-07-21 09:19:34,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:19:34,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-21 09:19:34,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:34,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 09:19:34,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:34,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:19:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:34,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:34,821 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:19:34,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-21 09:19:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:19:34,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781579142] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:34,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:19:34,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2022-07-21 09:19:34,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713682039] [2022-07-21 09:19:34,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:34,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:19:34,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:34,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:19:34,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:19:34,889 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-07-21 09:19:34,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 385 transitions, 2929 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:34,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:34,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-07-21 09:19:34,890 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:36,242 INFO L129 PetriNetUnfolder]: 2208/7622 cut-off events. [2022-07-21 09:19:36,243 INFO L130 PetriNetUnfolder]: For 25463/25771 co-relation queries the response was YES. [2022-07-21 09:19:36,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25694 conditions, 7622 events. 2208/7622 cut-off events. For 25463/25771 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 78191 event pairs, 470 based on Foata normal form. 60/7402 useless extension candidates. Maximal degree in co-relation 25611. Up to 1922 conditions per place. [2022-07-21 09:19:36,311 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 171 selfloop transitions, 70 changer transitions 5/438 dead transitions. [2022-07-21 09:19:36,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 438 transitions, 3675 flow [2022-07-21 09:19:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 09:19:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 09:19:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2250 transitions. [2022-07-21 09:19:36,314 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6983240223463687 [2022-07-21 09:19:36,314 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2250 transitions. [2022-07-21 09:19:36,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2250 transitions. [2022-07-21 09:19:36,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:36,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2250 transitions. [2022-07-21 09:19:36,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 125.0) internal successors, (2250), 18 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:36,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:36,337 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:36,337 INFO L186 Difference]: Start difference. First operand has 360 places, 385 transitions, 2929 flow. Second operand 18 states and 2250 transitions. [2022-07-21 09:19:36,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 438 transitions, 3675 flow [2022-07-21 09:19:36,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 438 transitions, 3511 flow, removed 27 selfloop flow, removed 20 redundant places. [2022-07-21 09:19:36,446 INFO L242 Difference]: Finished difference. Result has 358 places, 389 transitions, 2970 flow [2022-07-21 09:19:36,447 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2771, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2970, PETRI_PLACES=358, PETRI_TRANSITIONS=389} [2022-07-21 09:19:36,447 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 198 predicate places. [2022-07-21 09:19:36,447 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 389 transitions, 2970 flow [2022-07-21 09:19:36,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:36,448 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:36,448 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:36,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:19:36,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:36,653 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1124290073, now seen corresponding path program 7 times [2022-07-21 09:19:36,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:36,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732060561] [2022-07-21 09:19:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:36,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:36,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:36,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732060561] [2022-07-21 09:19:36,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732060561] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:36,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807899414] [2022-07-21 09:19:36,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:19:36,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:36,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:36,889 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) [2022-07-21 09:19:36,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:19:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:36,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-21 09:19:36,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:36,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:19:37,067 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:19:37,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:19:37,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 09:19:37,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:19:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:37,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:37,484 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_282 (Array Int Int))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_282) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2022-07-21 09:19:37,496 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:19:37,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2022-07-21 09:19:37,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-21 09:19:37,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 09:19:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:37,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807899414] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:37,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:37,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 26 [2022-07-21 09:19:37,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704326363] [2022-07-21 09:19:37,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:37,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 09:19:37,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:37,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 09:19:37,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=519, Unknown=1, NotChecked=46, Total=650 [2022-07-21 09:19:37,912 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 179 [2022-07-21 09:19:37,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 389 transitions, 2970 flow. Second operand has 26 states, 26 states have (on average 104.46153846153847) internal successors, (2716), 26 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:37,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:37,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 179 [2022-07-21 09:19:37,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:39,705 INFO L129 PetriNetUnfolder]: 2521/8565 cut-off events. [2022-07-21 09:19:39,706 INFO L130 PetriNetUnfolder]: For 31700/32097 co-relation queries the response was YES. [2022-07-21 09:19:39,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29794 conditions, 8565 events. 2521/8565 cut-off events. For 31700/32097 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 90009 event pairs, 482 based on Foata normal form. 59/8306 useless extension candidates. Maximal degree in co-relation 29709. Up to 1687 conditions per place. [2022-07-21 09:19:39,797 INFO L132 encePairwiseOnDemand]: 153/179 looper letters, 191 selfloop transitions, 131 changer transitions 9/509 dead transitions. [2022-07-21 09:19:39,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 509 transitions, 4574 flow [2022-07-21 09:19:39,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 09:19:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-21 09:19:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2601 transitions. [2022-07-21 09:19:39,807 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6054469273743017 [2022-07-21 09:19:39,807 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2601 transitions. [2022-07-21 09:19:39,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2601 transitions. [2022-07-21 09:19:39,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:39,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2601 transitions. [2022-07-21 09:19:39,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 108.375) internal successors, (2601), 24 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:39,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:39,826 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:39,827 INFO L186 Difference]: Start difference. First operand has 358 places, 389 transitions, 2970 flow. Second operand 24 states and 2601 transitions. [2022-07-21 09:19:39,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 509 transitions, 4574 flow [2022-07-21 09:19:40,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 509 transitions, 4328 flow, removed 30 selfloop flow, removed 14 redundant places. [2022-07-21 09:19:40,084 INFO L242 Difference]: Finished difference. Result has 375 places, 436 transitions, 3726 flow [2022-07-21 09:19:40,085 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3726, PETRI_PLACES=375, PETRI_TRANSITIONS=436} [2022-07-21 09:19:40,085 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 215 predicate places. [2022-07-21 09:19:40,085 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 436 transitions, 3726 flow [2022-07-21 09:19:40,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.46153846153847) internal successors, (2716), 26 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:40,100 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:40,100 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:40,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 09:19:40,300 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,SelfDestructingSolverStorable15 [2022-07-21 09:19:40,300 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:40,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:40,301 INFO L85 PathProgramCache]: Analyzing trace with hash -574941255, now seen corresponding path program 8 times [2022-07-21 09:19:40,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:40,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635893904] [2022-07-21 09:19:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:40,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:40,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:40,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635893904] [2022-07-21 09:19:40,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635893904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:40,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491996832] [2022-07-21 09:19:40,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:19:40,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:40,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:40,553 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) [2022-07-21 09:19:40,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:19:40,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:19:40,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:40,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 09:19:40,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:41,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:19:41,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 09:19:41,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:19:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:41,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:41,139 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_307 (Array Int Int))) (= c_~x1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_307) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2022-07-21 09:19:41,148 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_307 (Array Int Int))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_307) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2022-07-21 09:19:41,152 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:19:41,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2022-07-21 09:19:41,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-21 09:19:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:41,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491996832] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:41,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:41,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 34 [2022-07-21 09:19:41,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040101537] [2022-07-21 09:19:41,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:41,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:19:41,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:41,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:19:41,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=870, Unknown=2, NotChecked=122, Total=1122 [2022-07-21 09:19:41,342 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 179 [2022-07-21 09:19:41,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 436 transitions, 3726 flow. Second operand has 34 states, 34 states have (on average 103.52941176470588) internal successors, (3520), 34 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:41,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:41,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 179 [2022-07-21 09:19:41,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:43,642 INFO L129 PetriNetUnfolder]: 2670/9247 cut-off events. [2022-07-21 09:19:43,643 INFO L130 PetriNetUnfolder]: For 43687/44292 co-relation queries the response was YES. [2022-07-21 09:19:43,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34911 conditions, 9247 events. 2670/9247 cut-off events. For 43687/44292 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 99187 event pairs, 448 based on Foata normal form. 81/8974 useless extension candidates. Maximal degree in co-relation 34818. Up to 1922 conditions per place. [2022-07-21 09:19:43,743 INFO L132 encePairwiseOnDemand]: 152/179 looper letters, 207 selfloop transitions, 132 changer transitions 9/525 dead transitions. [2022-07-21 09:19:43,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 525 transitions, 5157 flow [2022-07-21 09:19:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 09:19:43,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-21 09:19:43,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2466 transitions. [2022-07-21 09:19:43,746 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.598979839689094 [2022-07-21 09:19:43,746 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2466 transitions. [2022-07-21 09:19:43,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2466 transitions. [2022-07-21 09:19:43,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:43,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2466 transitions. [2022-07-21 09:19:43,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 107.21739130434783) internal successors, (2466), 23 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:43,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:43,751 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:43,751 INFO L186 Difference]: Start difference. First operand has 375 places, 436 transitions, 3726 flow. Second operand 23 states and 2466 transitions. [2022-07-21 09:19:43,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 525 transitions, 5157 flow [2022-07-21 09:19:43,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 525 transitions, 4961 flow, removed 68 selfloop flow, removed 11 redundant places. [2022-07-21 09:19:43,948 INFO L242 Difference]: Finished difference. Result has 393 places, 458 transitions, 4183 flow [2022-07-21 09:19:43,948 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4183, PETRI_PLACES=393, PETRI_TRANSITIONS=458} [2022-07-21 09:19:43,949 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 233 predicate places. [2022-07-21 09:19:43,949 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 458 transitions, 4183 flow [2022-07-21 09:19:43,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 103.52941176470588) internal successors, (3520), 34 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:43,949 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:43,950 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:43,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-21 09:19:44,163 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,SelfDestructingSolverStorable16 [2022-07-21 09:19:44,163 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:44,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:44,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1350777330, now seen corresponding path program 2 times [2022-07-21 09:19:44,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:44,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583087749] [2022-07-21 09:19:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:44,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:19:44,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:44,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583087749] [2022-07-21 09:19:44,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583087749] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:44,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629341095] [2022-07-21 09:19:44,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:19:44,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:44,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:44,282 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) [2022-07-21 09:19:44,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:19:44,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:19:44,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:44,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 09:19:44,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:19:44,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:19:44,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629341095] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:44,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:44,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-21 09:19:44,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184608342] [2022-07-21 09:19:44,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:44,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:19:44,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:44,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:19:44,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:19:44,872 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-21 09:19:44,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 458 transitions, 4183 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:44,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:44,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-21 09:19:44,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:47,397 INFO L129 PetriNetUnfolder]: 2745/10572 cut-off events. [2022-07-21 09:19:47,398 INFO L130 PetriNetUnfolder]: For 51207/51655 co-relation queries the response was YES. [2022-07-21 09:19:47,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40411 conditions, 10572 events. 2745/10572 cut-off events. For 51207/51655 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 117626 event pairs, 747 based on Foata normal form. 86/9935 useless extension candidates. Maximal degree in co-relation 40310. Up to 1156 conditions per place. [2022-07-21 09:19:47,527 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 138 selfloop transitions, 108 changer transitions 0/619 dead transitions. [2022-07-21 09:19:47,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 619 transitions, 5810 flow [2022-07-21 09:19:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 09:19:47,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-21 09:19:47,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4010 transitions. [2022-07-21 09:19:47,531 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8297123939582041 [2022-07-21 09:19:47,531 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4010 transitions. [2022-07-21 09:19:47,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4010 transitions. [2022-07-21 09:19:47,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:47,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4010 transitions. [2022-07-21 09:19:47,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 148.5185185185185) internal successors, (4010), 27 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:47,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 179.0) internal successors, (5012), 28 states have internal predecessors, (5012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:47,538 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 179.0) internal successors, (5012), 28 states have internal predecessors, (5012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:47,538 INFO L186 Difference]: Start difference. First operand has 393 places, 458 transitions, 4183 flow. Second operand 27 states and 4010 transitions. [2022-07-21 09:19:47,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 619 transitions, 5810 flow [2022-07-21 09:19:47,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 619 transitions, 5563 flow, removed 69 selfloop flow, removed 13 redundant places. [2022-07-21 09:19:47,923 INFO L242 Difference]: Finished difference. Result has 422 places, 542 transitions, 5114 flow [2022-07-21 09:19:47,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3936, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5114, PETRI_PLACES=422, PETRI_TRANSITIONS=542} [2022-07-21 09:19:47,924 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 262 predicate places. [2022-07-21 09:19:47,924 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 542 transitions, 5114 flow [2022-07-21 09:19:47,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:47,925 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:47,925 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:47,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:19:48,143 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,SelfDestructingSolverStorable17 [2022-07-21 09:19:48,143 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:48,144 INFO L85 PathProgramCache]: Analyzing trace with hash -379462702, now seen corresponding path program 3 times [2022-07-21 09:19:48,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:48,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149092612] [2022-07-21 09:19:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:48,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:19:48,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:48,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149092612] [2022-07-21 09:19:48,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149092612] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:48,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542600083] [2022-07-21 09:19:48,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:19:48,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:48,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:48,284 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) [2022-07-21 09:19:48,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:19:48,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:19:48,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:48,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 09:19:48,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:19:48,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:19:48,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542600083] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:48,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:48,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-21 09:19:48,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418357527] [2022-07-21 09:19:48,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:48,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:19:48,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:48,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:19:48,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:19:48,896 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-21 09:19:48,897 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 542 transitions, 5114 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:48,897 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:48,897 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-21 09:19:48,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:55,724 INFO L129 PetriNetUnfolder]: 4446/17008 cut-off events. [2022-07-21 09:19:55,724 INFO L130 PetriNetUnfolder]: For 89276/89966 co-relation queries the response was YES. [2022-07-21 09:19:55,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69543 conditions, 17008 events. 4446/17008 cut-off events. For 89276/89966 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 207077 event pairs, 1188 based on Foata normal form. 117/15948 useless extension candidates. Maximal degree in co-relation 69426. Up to 1762 conditions per place. [2022-07-21 09:19:55,977 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 226 selfloop transitions, 287 changer transitions 2/888 dead transitions. [2022-07-21 09:19:55,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 888 transitions, 9173 flow [2022-07-21 09:19:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-21 09:19:55,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-21 09:19:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 10511 transitions. [2022-07-21 09:19:55,986 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8270516956487528 [2022-07-21 09:19:55,986 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 10511 transitions. [2022-07-21 09:19:55,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 10511 transitions. [2022-07-21 09:19:55,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:55,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 10511 transitions. [2022-07-21 09:19:55,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 148.04225352112675) internal successors, (10511), 71 states have internal predecessors, (10511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:56,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 179.0) internal successors, (12888), 72 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:56,006 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 179.0) internal successors, (12888), 72 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:56,006 INFO L186 Difference]: Start difference. First operand has 422 places, 542 transitions, 5114 flow. Second operand 71 states and 10511 transitions. [2022-07-21 09:19:56,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 888 transitions, 9173 flow [2022-07-21 09:19:56,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 888 transitions, 8887 flow, removed 125 selfloop flow, removed 1 redundant places. [2022-07-21 09:19:56,660 INFO L242 Difference]: Finished difference. Result has 515 places, 730 transitions, 7783 flow [2022-07-21 09:19:56,661 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=4968, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=7783, PETRI_PLACES=515, PETRI_TRANSITIONS=730} [2022-07-21 09:19:56,662 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 355 predicate places. [2022-07-21 09:19:56,662 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 730 transitions, 7783 flow [2022-07-21 09:19:56,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:56,662 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:56,663 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:19:56,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-21 09:19:56,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:56,880 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:56,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:56,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2070868552, now seen corresponding path program 4 times [2022-07-21 09:19:56,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:56,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961515374] [2022-07-21 09:19:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:56,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:19:57,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:57,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961515374] [2022-07-21 09:19:57,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961515374] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:57,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734691005] [2022-07-21 09:19:57,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:19:57,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:57,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:57,170 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) [2022-07-21 09:19:57,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:19:57,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:19:57,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:57,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 09:19:57,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:19:57,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:19:57,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734691005] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:57,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:57,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-07-21 09:19:57,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84268918] [2022-07-21 09:19:57,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:57,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 09:19:57,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:57,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 09:19:57,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-07-21 09:19:57,870 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-21 09:19:57,872 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 730 transitions, 7783 flow. Second operand has 25 states, 25 states have (on average 144.64) internal successors, (3616), 25 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:57,872 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:57,872 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-21 09:19:57,872 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:04,009 INFO L129 PetriNetUnfolder]: 5593/22143 cut-off events. [2022-07-21 09:20:04,009 INFO L130 PetriNetUnfolder]: For 149062/149971 co-relation queries the response was YES. [2022-07-21 09:20:04,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95757 conditions, 22143 events. 5593/22143 cut-off events. For 149062/149971 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 284848 event pairs, 1666 based on Foata normal form. 163/20772 useless extension candidates. Maximal degree in co-relation 95617. Up to 2209 conditions per place. [2022-07-21 09:20:04,623 INFO L132 encePairwiseOnDemand]: 163/179 looper letters, 275 selfloop transitions, 406 changer transitions 0/1054 dead transitions. [2022-07-21 09:20:04,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1054 transitions, 12905 flow [2022-07-21 09:20:04,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 09:20:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-21 09:20:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5835 transitions. [2022-07-21 09:20:04,646 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8358401375161152 [2022-07-21 09:20:04,646 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5835 transitions. [2022-07-21 09:20:04,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5835 transitions. [2022-07-21 09:20:04,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:04,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5835 transitions. [2022-07-21 09:20:04,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 149.6153846153846) internal successors, (5835), 39 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:04,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 179.0) internal successors, (7160), 40 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:04,672 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 179.0) internal successors, (7160), 40 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:04,673 INFO L186 Difference]: Start difference. First operand has 515 places, 730 transitions, 7783 flow. Second operand 39 states and 5835 transitions. [2022-07-21 09:20:04,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1054 transitions, 12905 flow [2022-07-21 09:20:06,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 1054 transitions, 11921 flow, removed 446 selfloop flow, removed 3 redundant places. [2022-07-21 09:20:06,035 INFO L242 Difference]: Finished difference. Result has 568 places, 897 transitions, 10446 flow [2022-07-21 09:20:06,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=7127, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=10446, PETRI_PLACES=568, PETRI_TRANSITIONS=897} [2022-07-21 09:20:06,036 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 408 predicate places. [2022-07-21 09:20:06,036 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 897 transitions, 10446 flow [2022-07-21 09:20:06,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 144.64) internal successors, (3616), 25 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:06,037 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:06,037 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:20:06,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 09:20:06,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:20:06,254 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:06,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:06,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1560836330, now seen corresponding path program 5 times [2022-07-21 09:20:06,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:06,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830896539] [2022-07-21 09:20:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:06,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:20:06,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:06,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830896539] [2022-07-21 09:20:06,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830896539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:20:06,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025731429] [2022-07-21 09:20:06,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:20:06,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:20:06,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:20:06,398 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) [2022-07-21 09:20:06,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:20:06,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:20:06,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:20:06,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 09:20:06,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:20:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:20:06,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:20:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:20:07,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025731429] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:20:07,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:20:07,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-07-21 09:20:07,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745540246] [2022-07-21 09:20:07,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:20:07,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:20:07,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:07,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:20:07,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:20:07,151 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-21 09:20:07,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 897 transitions, 10446 flow. Second operand has 20 states, 20 states have (on average 144.75) internal successors, (2895), 20 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:07,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:07,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-21 09:20:07,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:16,042 INFO L129 PetriNetUnfolder]: 5764/23078 cut-off events. [2022-07-21 09:20:16,042 INFO L130 PetriNetUnfolder]: For 179908/180899 co-relation queries the response was YES. [2022-07-21 09:20:16,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102854 conditions, 23078 events. 5764/23078 cut-off events. For 179908/180899 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 298374 event pairs, 1623 based on Foata normal form. 202/21766 useless extension candidates. Maximal degree in co-relation 102696. Up to 2201 conditions per place. [2022-07-21 09:20:16,544 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 241 selfloop transitions, 481 changer transitions 0/1095 dead transitions. [2022-07-21 09:20:16,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 1095 transitions, 14036 flow [2022-07-21 09:20:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-21 09:20:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-21 09:20:16,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 10075 transitions. [2022-07-21 09:20:16,551 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8277193558987841 [2022-07-21 09:20:16,552 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 10075 transitions. [2022-07-21 09:20:16,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 10075 transitions. [2022-07-21 09:20:16,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:16,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 10075 transitions. [2022-07-21 09:20:16,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 148.16176470588235) internal successors, (10075), 68 states have internal predecessors, (10075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:16,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 179.0) internal successors, (12351), 69 states have internal predecessors, (12351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:16,570 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 179.0) internal successors, (12351), 69 states have internal predecessors, (12351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:16,570 INFO L186 Difference]: Start difference. First operand has 568 places, 897 transitions, 10446 flow. Second operand 68 states and 10075 transitions. [2022-07-21 09:20:16,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 1095 transitions, 14036 flow [2022-07-21 09:20:18,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 1095 transitions, 13643 flow, removed 177 selfloop flow, removed 3 redundant places. [2022-07-21 09:20:18,303 INFO L242 Difference]: Finished difference. Result has 643 places, 948 transitions, 12264 flow [2022-07-21 09:20:18,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=10171, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=12264, PETRI_PLACES=643, PETRI_TRANSITIONS=948} [2022-07-21 09:20:18,304 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 483 predicate places. [2022-07-21 09:20:18,304 INFO L495 AbstractCegarLoop]: Abstraction has has 643 places, 948 transitions, 12264 flow [2022-07-21 09:20:18,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 144.75) internal successors, (2895), 20 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:18,305 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:18,305 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:20:18,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:20:18,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-21 09:20:18,518 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:18,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:18,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1328439012, now seen corresponding path program 6 times [2022-07-21 09:20:18,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:18,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323931428] [2022-07-21 09:20:18,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:18,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:20:18,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:18,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323931428] [2022-07-21 09:20:18,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323931428] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:20:18,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893653093] [2022-07-21 09:20:18,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:20:18,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:20:18,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:20:18,668 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) [2022-07-21 09:20:18,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:20:18,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:20:18,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:20:18,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 09:20:18,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:20:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:20:18,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:20:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:20:19,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893653093] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:20:19,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:20:19,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-21 09:20:19,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037745367] [2022-07-21 09:20:19,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:20:19,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:20:19,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:19,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:20:19,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:20:19,155 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-21 09:20:19,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 948 transitions, 12264 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:19,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:19,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-21 09:20:19,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand