./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i -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 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:48:22,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:48:22,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:48:22,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:48:22,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:48:22,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:48:22,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:48:22,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:48:22,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:48:22,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:48:22,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:48:22,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:48:22,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:48:22,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:48:22,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:48:22,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:48:22,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:48:22,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:48:22,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:48:22,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:48:22,787 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:48:22,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:48:22,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:48:22,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:48:22,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:48:22,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:48:22,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:48:22,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:48:22,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:48:22,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:48:22,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:48:22,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:48:22,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:48:22,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:48:22,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:48:22,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:48:22,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:48:22,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:48:22,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:48:22,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:48:22,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:48:22,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:48:22,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:48:22,833 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:48:22,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:48:22,834 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:48:22,834 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:48:22,835 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:48:22,835 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:48:22,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:48:22,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:48:22,836 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:48:22,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:48:22,837 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:48:22,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:48:22,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:48:22,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:48:22,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:48:22,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:48:22,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:48:22,838 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:48:22,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:48:22,839 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:48:22,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:48:22,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:48:22,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:48:22,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:48:22,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:48:22,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:48:22,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:48:22,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:48:22,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:48:22,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:48:22,841 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:48:22,841 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:48:22,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:48:22,841 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 [2022-07-19 21:48:23,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:48:23,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:48:23,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:48:23,096 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:48:23,097 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:48:23,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i [2022-07-19 21:48:23,144 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e178c1de0/00bd3d51a26d4543babcd7d4c90f6ae9/FLAG7a077ea85 [2022-07-19 21:48:23,585 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:48:23,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i [2022-07-19 21:48:23,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e178c1de0/00bd3d51a26d4543babcd7d4c90f6ae9/FLAG7a077ea85 [2022-07-19 21:48:23,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e178c1de0/00bd3d51a26d4543babcd7d4c90f6ae9 [2022-07-19 21:48:23,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:48:23,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:48:23,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:48:23,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:48:23,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:48:23,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:48:23" (1/1) ... [2022-07-19 21:48:23,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e51e72d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:23, skipping insertion in model container [2022-07-19 21:48:23,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:48:23" (1/1) ... [2022-07-19 21:48:23,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:48:24,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:48:24,282 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/pthread-deagle/circular_buffer_ok.i[30451,30464] [2022-07-19 21:48:24,287 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/pthread-deagle/circular_buffer_ok.i[30681,30694] [2022-07-19 21:48:24,296 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/pthread-deagle/circular_buffer_ok.i[30979,30992] [2022-07-19 21:48:24,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:48:24,310 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:48:24,335 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/pthread-deagle/circular_buffer_ok.i[30451,30464] [2022-07-19 21:48:24,337 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/pthread-deagle/circular_buffer_ok.i[30681,30694] [2022-07-19 21:48:24,338 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/pthread-deagle/circular_buffer_ok.i[30979,30992] [2022-07-19 21:48:24,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:48:24,374 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:48:24,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:24 WrapperNode [2022-07-19 21:48:24,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:48:24,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:48:24,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:48:24,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:48:24,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:24" (1/1) ... [2022-07-19 21:48:24,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:24" (1/1) ... [2022-07-19 21:48:24,422 INFO L137 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 142 [2022-07-19 21:48:24,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:48:24,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:48:24,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:48:24,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:48:24,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:24" (1/1) ... [2022-07-19 21:48:24,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:24" (1/1) ... [2022-07-19 21:48:24,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:24" (1/1) ... [2022-07-19 21:48:24,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:24" (1/1) ... [2022-07-19 21:48:24,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:24" (1/1) ... [2022-07-19 21:48:24,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:24" (1/1) ... [2022-07-19 21:48:24,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:24" (1/1) ... [2022-07-19 21:48:24,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:48:24,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:48:24,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:48:24,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:48:24,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:24" (1/1) ... [2022-07-19 21:48:24,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:48:24,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:24,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:48:24,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:48:24,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:48:24,555 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-19 21:48:24,556 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-19 21:48:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-19 21:48:24,556 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-19 21:48:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:48:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:48:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:48:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:48:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:48:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-19 21:48:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:48:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:48:24,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:48:24,557 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:48:24,655 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:48:24,657 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:48:24,865 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:48:24,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:48:24,872 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:48:24,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:48:24 BoogieIcfgContainer [2022-07-19 21:48:24,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:48:24,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:48:24,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:48:24,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:48:24,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:48:23" (1/3) ... [2022-07-19 21:48:24,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d3da29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:48:24, skipping insertion in model container [2022-07-19 21:48:24,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:24" (2/3) ... [2022-07-19 21:48:24,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d3da29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:48:24, skipping insertion in model container [2022-07-19 21:48:24,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:48:24" (3/3) ... [2022-07-19 21:48:24,882 INFO L111 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2022-07-19 21:48:24,886 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:48:24,895 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:48:24,895 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-07-19 21:48:24,895 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:48:25,038 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:48:25,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 154 places, 158 transitions, 332 flow [2022-07-19 21:48:25,171 INFO L129 PetriNetUnfolder]: 11/156 cut-off events. [2022-07-19 21:48:25,171 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:48:25,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 11/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 293 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2022-07-19 21:48:25,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 158 transitions, 332 flow [2022-07-19 21:48:25,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 146 transitions, 301 flow [2022-07-19 21:48:25,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:48:25,197 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@4d0c55de, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@72e613e0 [2022-07-19 21:48:25,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-19 21:48:25,225 INFO L129 PetriNetUnfolder]: 5/112 cut-off events. [2022-07-19 21:48:25,225 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:48:25,226 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:25,226 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] [2022-07-19 21:48:25,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:48:25,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:25,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1257082362, now seen corresponding path program 1 times [2022-07-19 21:48:25,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:25,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475250386] [2022-07-19 21:48:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:25,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:25,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:48:25,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48813910] [2022-07-19 21:48:25,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:25,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:25,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:25,441 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:25,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:48:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:25,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:48:25,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:25,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:48:25,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:25,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475250386] [2022-07-19 21:48:25,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:48:25,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48813910] [2022-07-19 21:48:25,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48813910] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:25,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:25,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:48:25,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184548021] [2022-07-19 21:48:25,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:25,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:48:25,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:25,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:48:25,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:48:25,979 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 158 [2022-07-19 21:48:25,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 146 transitions, 301 flow. Second operand has 4 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:25,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:25,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 158 [2022-07-19 21:48:25,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:26,090 INFO L129 PetriNetUnfolder]: 29/250 cut-off events. [2022-07-19 21:48:26,091 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:48:26,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 250 events. 29/250 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 869 event pairs, 8 based on Foata normal form. 21/246 useless extension candidates. Maximal degree in co-relation 240. Up to 29 conditions per place. [2022-07-19 21:48:26,095 INFO L132 encePairwiseOnDemand]: 150/158 looper letters, 18 selfloop transitions, 3 changer transitions 0/142 dead transitions. [2022-07-19 21:48:26,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 142 transitions, 341 flow [2022-07-19 21:48:26,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:48:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:48:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 562 transitions. [2022-07-19 21:48:26,115 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8892405063291139 [2022-07-19 21:48:26,116 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 562 transitions. [2022-07-19 21:48:26,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 562 transitions. [2022-07-19 21:48:26,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:26,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 562 transitions. [2022-07-19 21:48:26,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:26,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:26,135 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:26,137 INFO L186 Difference]: Start difference. First operand has 142 places, 146 transitions, 301 flow. Second operand 4 states and 562 transitions. [2022-07-19 21:48:26,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 142 transitions, 341 flow [2022-07-19 21:48:26,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 142 transitions, 334 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:48:26,147 INFO L242 Difference]: Finished difference. Result has 137 places, 136 transitions, 282 flow [2022-07-19 21:48:26,149 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=137, PETRI_TRANSITIONS=136} [2022-07-19 21:48:26,152 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, -5 predicate places. [2022-07-19 21:48:26,153 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 136 transitions, 282 flow [2022-07-19 21:48:26,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:26,154 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:26,155 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] [2022-07-19 21:48:26,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 21:48:26,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-19 21:48:26,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:48:26,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:26,360 INFO L85 PathProgramCache]: Analyzing trace with hash 286149751, now seen corresponding path program 1 times [2022-07-19 21:48:26,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:26,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470480795] [2022-07-19 21:48:26,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:26,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:26,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:26,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470480795] [2022-07-19 21:48:26,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470480795] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:26,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:26,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:48:26,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047114120] [2022-07-19 21:48:26,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:26,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:48:26,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:26,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:48:26,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:48:26,611 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 158 [2022-07-19 21:48:26,612 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 136 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 131.66666666666666) internal successors, (790), 6 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:26,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:26,612 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 158 [2022-07-19 21:48:26,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:26,722 INFO L129 PetriNetUnfolder]: 51/369 cut-off events. [2022-07-19 21:48:26,722 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-19 21:48:26,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 369 events. 51/369 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1401 event pairs, 10 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 266. Up to 56 conditions per place. [2022-07-19 21:48:26,727 INFO L132 encePairwiseOnDemand]: 151/158 looper letters, 19 selfloop transitions, 5 changer transitions 0/142 dead transitions. [2022-07-19 21:48:26,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 142 transitions, 349 flow [2022-07-19 21:48:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:48:26,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:48:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 806 transitions. [2022-07-19 21:48:26,730 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8502109704641351 [2022-07-19 21:48:26,730 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 806 transitions. [2022-07-19 21:48:26,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 806 transitions. [2022-07-19 21:48:26,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:26,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 806 transitions. [2022-07-19 21:48:26,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:26,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:26,736 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:26,736 INFO L186 Difference]: Start difference. First operand has 137 places, 136 transitions, 282 flow. Second operand 6 states and 806 transitions. [2022-07-19 21:48:26,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 142 transitions, 349 flow [2022-07-19 21:48:26,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 142 transitions, 339 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:48:26,740 INFO L242 Difference]: Finished difference. Result has 140 places, 137 transitions, 296 flow [2022-07-19 21:48:26,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=140, PETRI_TRANSITIONS=137} [2022-07-19 21:48:26,741 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, -2 predicate places. [2022-07-19 21:48:26,742 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 137 transitions, 296 flow [2022-07-19 21:48:26,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 131.66666666666666) internal successors, (790), 6 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:26,742 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:26,743 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:26,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:48:26,743 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:48:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:26,744 INFO L85 PathProgramCache]: Analyzing trace with hash 830490914, now seen corresponding path program 1 times [2022-07-19 21:48:26,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:26,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296050741] [2022-07-19 21:48:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:26,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:26,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:48:26,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515936179] [2022-07-19 21:48:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:26,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:26,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:26,774 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:26,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:48:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:26,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:48:26,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:26,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:48:26,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:26,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296050741] [2022-07-19 21:48:26,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:48:26,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515936179] [2022-07-19 21:48:26,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515936179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:26,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:26,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:48:26,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211537680] [2022-07-19 21:48:26,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:26,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:48:26,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:26,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:48:26,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:48:26,959 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 158 [2022-07-19 21:48:26,960 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 137 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 128.33333333333334) internal successors, (770), 6 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:26,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:26,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 158 [2022-07-19 21:48:26,961 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:27,107 INFO L129 PetriNetUnfolder]: 54/345 cut-off events. [2022-07-19 21:48:27,108 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:48:27,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 345 events. 54/345 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1201 event pairs, 11 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 233. Up to 39 conditions per place. [2022-07-19 21:48:27,111 INFO L132 encePairwiseOnDemand]: 150/158 looper letters, 28 selfloop transitions, 9 changer transitions 0/151 dead transitions. [2022-07-19 21:48:27,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 151 transitions, 408 flow [2022-07-19 21:48:27,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:48:27,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:48:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 920 transitions. [2022-07-19 21:48:27,115 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8318264014466547 [2022-07-19 21:48:27,115 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 920 transitions. [2022-07-19 21:48:27,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 920 transitions. [2022-07-19 21:48:27,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:27,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 920 transitions. [2022-07-19 21:48:27,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.42857142857142) internal successors, (920), 7 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:27,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:27,122 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:27,122 INFO L186 Difference]: Start difference. First operand has 140 places, 137 transitions, 296 flow. Second operand 7 states and 920 transitions. [2022-07-19 21:48:27,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 151 transitions, 408 flow [2022-07-19 21:48:27,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 151 transitions, 400 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:48:27,126 INFO L242 Difference]: Finished difference. Result has 145 places, 142 transitions, 335 flow [2022-07-19 21:48:27,127 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=335, PETRI_PLACES=145, PETRI_TRANSITIONS=142} [2022-07-19 21:48:27,129 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 3 predicate places. [2022-07-19 21:48:27,129 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 142 transitions, 335 flow [2022-07-19 21:48:27,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 128.33333333333334) internal successors, (770), 6 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:27,130 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:27,130 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] [2022-07-19 21:48:27,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:27,351 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,SelfDestructingSolverStorable2 [2022-07-19 21:48:27,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:48:27,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:27,352 INFO L85 PathProgramCache]: Analyzing trace with hash 834900101, now seen corresponding path program 1 times [2022-07-19 21:48:27,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:27,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3084269] [2022-07-19 21:48:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:27,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:27,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:27,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3084269] [2022-07-19 21:48:27,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3084269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:27,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:27,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:48:27,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270838594] [2022-07-19 21:48:27,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:27,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:48:27,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:48:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:48:27,466 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 158 [2022-07-19 21:48:27,467 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 142 transitions, 335 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:27,467 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:27,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 158 [2022-07-19 21:48:27,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:27,549 INFO L129 PetriNetUnfolder]: 43/500 cut-off events. [2022-07-19 21:48:27,550 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-19 21:48:27,552 INFO L84 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 500 events. 43/500 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 5 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 520. Up to 36 conditions per place. [2022-07-19 21:48:27,553 INFO L132 encePairwiseOnDemand]: 154/158 looper letters, 10 selfloop transitions, 3 changer transitions 0/146 dead transitions. [2022-07-19 21:48:27,553 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 146 transitions, 372 flow [2022-07-19 21:48:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:48:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:48:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2022-07-19 21:48:27,555 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9156118143459916 [2022-07-19 21:48:27,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2022-07-19 21:48:27,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2022-07-19 21:48:27,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:27,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2022-07-19 21:48:27,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:27,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:27,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:27,559 INFO L186 Difference]: Start difference. First operand has 145 places, 142 transitions, 335 flow. Second operand 3 states and 434 transitions. [2022-07-19 21:48:27,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 146 transitions, 372 flow [2022-07-19 21:48:27,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 146 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:48:27,563 INFO L242 Difference]: Finished difference. Result has 147 places, 143 transitions, 348 flow [2022-07-19 21:48:27,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=348, PETRI_PLACES=147, PETRI_TRANSITIONS=143} [2022-07-19 21:48:27,564 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 5 predicate places. [2022-07-19 21:48:27,564 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 143 transitions, 348 flow [2022-07-19 21:48:27,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:27,565 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:27,565 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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] [2022-07-19 21:48:27,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:48:27,566 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:48:27,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:27,566 INFO L85 PathProgramCache]: Analyzing trace with hash -520728899, now seen corresponding path program 1 times [2022-07-19 21:48:27,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:27,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502651221] [2022-07-19 21:48:27,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:27,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:27,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:48:27,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629399289] [2022-07-19 21:48:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:27,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:27,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:27,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:27,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:48:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:27,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 21:48:27,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:27,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:48:27,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:27,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502651221] [2022-07-19 21:48:27,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:48:27,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629399289] [2022-07-19 21:48:27,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629399289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:27,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:27,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:48:27,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353926920] [2022-07-19 21:48:27,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:27,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:48:27,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:27,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:48:27,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:48:27,842 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 158 [2022-07-19 21:48:27,842 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 143 transitions, 348 flow. Second operand has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:27,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:27,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 158 [2022-07-19 21:48:27,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:27,906 INFO L129 PetriNetUnfolder]: 40/431 cut-off events. [2022-07-19 21:48:27,907 INFO L130 PetriNetUnfolder]: For 33/36 co-relation queries the response was YES. [2022-07-19 21:48:27,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 431 events. 40/431 cut-off events. For 33/36 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1482 event pairs, 10 based on Foata normal form. 3/409 useless extension candidates. Maximal degree in co-relation 416. Up to 52 conditions per place. [2022-07-19 21:48:27,910 INFO L132 encePairwiseOnDemand]: 156/158 looper letters, 17 selfloop transitions, 1 changer transitions 0/137 dead transitions. [2022-07-19 21:48:27,911 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 137 transitions, 360 flow [2022-07-19 21:48:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:48:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:48:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2022-07-19 21:48:27,913 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.879746835443038 [2022-07-19 21:48:27,913 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2022-07-19 21:48:27,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2022-07-19 21:48:27,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:27,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2022-07-19 21:48:27,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:27,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:27,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:27,916 INFO L186 Difference]: Start difference. First operand has 147 places, 143 transitions, 348 flow. Second operand 3 states and 417 transitions. [2022-07-19 21:48:27,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 137 transitions, 360 flow [2022-07-19 21:48:27,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 137 transitions, 343 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-07-19 21:48:27,921 INFO L242 Difference]: Finished difference. Result has 139 places, 135 transitions, 305 flow [2022-07-19 21:48:27,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=139, PETRI_TRANSITIONS=135} [2022-07-19 21:48:27,922 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, -3 predicate places. [2022-07-19 21:48:27,922 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 135 transitions, 305 flow [2022-07-19 21:48:27,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:27,923 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:27,923 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] [2022-07-19 21:48:27,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:28,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:28,140 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:48:28,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:28,140 INFO L85 PathProgramCache]: Analyzing trace with hash -157225881, now seen corresponding path program 1 times [2022-07-19 21:48:28,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:28,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326138476] [2022-07-19 21:48:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:28,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:28,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:48:28,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615867514] [2022-07-19 21:48:28,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:28,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:28,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:28,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:28,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:48:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:28,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:48:28,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:28,344 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 [2022-07-19 21:48:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:28,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:48:28,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:28,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326138476] [2022-07-19 21:48:28,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:48:28,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615867514] [2022-07-19 21:48:28,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615867514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:28,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:28,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:48:28,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524629212] [2022-07-19 21:48:28,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:28,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:48:28,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:28,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:48:28,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:48:28,384 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 158 [2022-07-19 21:48:28,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 135 transitions, 305 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:28,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:28,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 158 [2022-07-19 21:48:28,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:28,440 INFO L129 PetriNetUnfolder]: 35/425 cut-off events. [2022-07-19 21:48:28,441 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-19 21:48:28,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 425 events. 35/425 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1624 event pairs, 10 based on Foata normal form. 7/412 useless extension candidates. Maximal degree in co-relation 388. Up to 42 conditions per place. [2022-07-19 21:48:28,443 INFO L132 encePairwiseOnDemand]: 154/158 looper letters, 15 selfloop transitions, 4 changer transitions 0/137 dead transitions. [2022-07-19 21:48:28,443 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 137 transitions, 350 flow [2022-07-19 21:48:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:48:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:48:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2022-07-19 21:48:28,446 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.879746835443038 [2022-07-19 21:48:28,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2022-07-19 21:48:28,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2022-07-19 21:48:28,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:28,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2022-07-19 21:48:28,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:28,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:28,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:28,449 INFO L186 Difference]: Start difference. First operand has 139 places, 135 transitions, 305 flow. Second operand 3 states and 417 transitions. [2022-07-19 21:48:28,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 137 transitions, 350 flow [2022-07-19 21:48:28,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 137 transitions, 348 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-19 21:48:28,452 INFO L242 Difference]: Finished difference. Result has 141 places, 135 transitions, 311 flow [2022-07-19 21:48:28,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=311, PETRI_PLACES=141, PETRI_TRANSITIONS=135} [2022-07-19 21:48:28,453 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, -1 predicate places. [2022-07-19 21:48:28,454 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 135 transitions, 311 flow [2022-07-19 21:48:28,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:28,454 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:28,454 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:28,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:28,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:28,680 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:48:28,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:28,680 INFO L85 PathProgramCache]: Analyzing trace with hash 637106843, now seen corresponding path program 1 times [2022-07-19 21:48:28,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:28,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5361034] [2022-07-19 21:48:28,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:28,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:28,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:48:28,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867706277] [2022-07-19 21:48:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:28,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:28,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:28,707 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:28,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:48:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:28,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:48:28,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:29,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:48:29,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:29,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5361034] [2022-07-19 21:48:29,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:48:29,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867706277] [2022-07-19 21:48:29,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867706277] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:29,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:29,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:48:29,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921345328] [2022-07-19 21:48:29,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:29,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:48:29,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:48:29,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:48:29,295 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 158 [2022-07-19 21:48:29,297 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 135 transitions, 311 flow. Second operand has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:29,297 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:29,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 158 [2022-07-19 21:48:29,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:29,440 INFO L129 PetriNetUnfolder]: 45/520 cut-off events. [2022-07-19 21:48:29,440 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-07-19 21:48:29,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 520 events. 45/520 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2226 event pairs, 13 based on Foata normal form. 0/488 useless extension candidates. Maximal degree in co-relation 485. Up to 49 conditions per place. [2022-07-19 21:48:29,444 INFO L132 encePairwiseOnDemand]: 150/158 looper letters, 27 selfloop transitions, 8 changer transitions 0/147 dead transitions. [2022-07-19 21:48:29,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 147 transitions, 415 flow [2022-07-19 21:48:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:48:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:48:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1044 transitions. [2022-07-19 21:48:29,447 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8259493670886076 [2022-07-19 21:48:29,447 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1044 transitions. [2022-07-19 21:48:29,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1044 transitions. [2022-07-19 21:48:29,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:29,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1044 transitions. [2022-07-19 21:48:29,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 130.5) internal successors, (1044), 8 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:29,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:29,453 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:29,453 INFO L186 Difference]: Start difference. First operand has 141 places, 135 transitions, 311 flow. Second operand 8 states and 1044 transitions. [2022-07-19 21:48:29,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 147 transitions, 415 flow [2022-07-19 21:48:29,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 147 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:48:29,456 INFO L242 Difference]: Finished difference. Result has 148 places, 137 transitions, 338 flow [2022-07-19 21:48:29,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=148, PETRI_TRANSITIONS=137} [2022-07-19 21:48:29,457 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 6 predicate places. [2022-07-19 21:48:29,458 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 137 transitions, 338 flow [2022-07-19 21:48:29,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:29,458 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:29,459 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] [2022-07-19 21:48:29,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:29,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:29,672 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:48:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1300379129, now seen corresponding path program 1 times [2022-07-19 21:48:29,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:29,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944457003] [2022-07-19 21:48:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:29,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:29,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:48:29,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478828009] [2022-07-19 21:48:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:29,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:29,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:29,690 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:29,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:48:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:29,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:48:29,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:29,962 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 7 treesize of output 6 [2022-07-19 21:48:30,093 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 21:48:30,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-19 21:48:30,119 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:48:30,119 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 [2022-07-19 21:48:30,244 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 13 treesize of output 15 [2022-07-19 21:48:30,285 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 13 treesize of output 15 [2022-07-19 21:48:30,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 53 treesize of output 46 [2022-07-19 21:48:30,599 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 45 treesize of output 39 [2022-07-19 21:48:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:30,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:48:30,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:30,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944457003] [2022-07-19 21:48:30,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:48:30,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478828009] [2022-07-19 21:48:30,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478828009] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:30,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:30,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-19 21:48:30,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788117186] [2022-07-19 21:48:30,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:30,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 21:48:30,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:30,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 21:48:30,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-07-19 21:48:30,721 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 158 [2022-07-19 21:48:30,723 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 137 transitions, 338 flow. Second operand has 16 states, 16 states have (on average 93.75) internal successors, (1500), 16 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:30,723 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:30,723 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 158 [2022-07-19 21:48:30,723 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:31,342 INFO L129 PetriNetUnfolder]: 885/3002 cut-off events. [2022-07-19 21:48:31,342 INFO L130 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2022-07-19 21:48:31,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5228 conditions, 3002 events. 885/3002 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 21469 event pairs, 197 based on Foata normal form. 0/2782 useless extension candidates. Maximal degree in co-relation 2591. Up to 545 conditions per place. [2022-07-19 21:48:31,361 INFO L132 encePairwiseOnDemand]: 140/158 looper letters, 120 selfloop transitions, 23 changer transitions 4/230 dead transitions. [2022-07-19 21:48:31,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 230 transitions, 858 flow [2022-07-19 21:48:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:48:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:48:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1510 transitions. [2022-07-19 21:48:31,366 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6371308016877637 [2022-07-19 21:48:31,366 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1510 transitions. [2022-07-19 21:48:31,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1510 transitions. [2022-07-19 21:48:31,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:31,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1510 transitions. [2022-07-19 21:48:31,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 100.66666666666667) internal successors, (1510), 15 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:31,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 158.0) internal successors, (2528), 16 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:31,375 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 158.0) internal successors, (2528), 16 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:31,375 INFO L186 Difference]: Start difference. First operand has 148 places, 137 transitions, 338 flow. Second operand 15 states and 1510 transitions. [2022-07-19 21:48:31,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 230 transitions, 858 flow [2022-07-19 21:48:31,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 230 transitions, 843 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-07-19 21:48:31,380 INFO L242 Difference]: Finished difference. Result has 163 places, 153 transitions, 464 flow [2022-07-19 21:48:31,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=464, PETRI_PLACES=163, PETRI_TRANSITIONS=153} [2022-07-19 21:48:31,381 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 21 predicate places. [2022-07-19 21:48:31,382 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 153 transitions, 464 flow [2022-07-19 21:48:31,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 93.75) internal successors, (1500), 16 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:31,383 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:31,383 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:48:31,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 21:48:31,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:31,600 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:48:31,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:31,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2021703457, now seen corresponding path program 1 times [2022-07-19 21:48:31,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:31,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544397831] [2022-07-19 21:48:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:31,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:31,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:48:31,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715787530] [2022-07-19 21:48:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:31,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:31,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:31,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:31,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:48:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:31,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 21:48:31,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:31,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:48:31,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:31,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544397831] [2022-07-19 21:48:31,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:48:31,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715787530] [2022-07-19 21:48:31,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715787530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:31,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:31,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:48:31,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256867540] [2022-07-19 21:48:31,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:31,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:48:31,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:31,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:48:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:48:31,771 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 158 [2022-07-19 21:48:31,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 153 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:31,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:31,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 158 [2022-07-19 21:48:31,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:31,850 INFO L129 PetriNetUnfolder]: 39/483 cut-off events. [2022-07-19 21:48:31,850 INFO L130 PetriNetUnfolder]: For 123/124 co-relation queries the response was YES. [2022-07-19 21:48:31,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 483 events. 39/483 cut-off events. For 123/124 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1554 event pairs, 7 based on Foata normal form. 1/466 useless extension candidates. Maximal degree in co-relation 623. Up to 32 conditions per place. [2022-07-19 21:48:31,853 INFO L132 encePairwiseOnDemand]: 152/158 looper letters, 9 selfloop transitions, 5 changer transitions 0/151 dead transitions. [2022-07-19 21:48:31,853 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 151 transitions, 484 flow [2022-07-19 21:48:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:48:31,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:48:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2022-07-19 21:48:31,855 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9135021097046413 [2022-07-19 21:48:31,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2022-07-19 21:48:31,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2022-07-19 21:48:31,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:31,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2022-07-19 21:48:31,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:31,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:31,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:31,858 INFO L186 Difference]: Start difference. First operand has 163 places, 153 transitions, 464 flow. Second operand 3 states and 433 transitions. [2022-07-19 21:48:31,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 151 transitions, 484 flow [2022-07-19 21:48:31,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 151 transitions, 465 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-07-19 21:48:31,862 INFO L242 Difference]: Finished difference. Result has 161 places, 149 transitions, 450 flow [2022-07-19 21:48:31,863 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=450, PETRI_PLACES=161, PETRI_TRANSITIONS=149} [2022-07-19 21:48:31,863 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 19 predicate places. [2022-07-19 21:48:31,864 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 149 transitions, 450 flow [2022-07-19 21:48:31,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:31,864 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:31,864 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] [2022-07-19 21:48:31,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:32,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:32,079 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:48:32,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:32,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1952781966, now seen corresponding path program 1 times [2022-07-19 21:48:32,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:32,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484555423] [2022-07-19 21:48:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:32,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:32,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:48:32,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596082723] [2022-07-19 21:48:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:32,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:32,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:32,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:32,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:48:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:32,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:48:32,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:32,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:48:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:32,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:32,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484555423] [2022-07-19 21:48:32,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:48:32,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596082723] [2022-07-19 21:48:32,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596082723] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:32,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:48:32,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-19 21:48:32,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228855384] [2022-07-19 21:48:32,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:32,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:48:32,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:32,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:48:32,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:48:32,375 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 158 [2022-07-19 21:48:32,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 149 transitions, 450 flow. Second operand has 8 states, 8 states have (on average 137.875) internal successors, (1103), 8 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:32,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:32,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 158 [2022-07-19 21:48:32,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:32,500 INFO L129 PetriNetUnfolder]: 75/697 cut-off events. [2022-07-19 21:48:32,500 INFO L130 PetriNetUnfolder]: For 211/236 co-relation queries the response was YES. [2022-07-19 21:48:32,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1271 conditions, 697 events. 75/697 cut-off events. For 211/236 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2951 event pairs, 17 based on Foata normal form. 24/703 useless extension candidates. Maximal degree in co-relation 1088. Up to 52 conditions per place. [2022-07-19 21:48:32,505 INFO L132 encePairwiseOnDemand]: 152/158 looper letters, 28 selfloop transitions, 14 changer transitions 0/171 dead transitions. [2022-07-19 21:48:32,506 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 171 transitions, 611 flow [2022-07-19 21:48:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:48:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:48:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1252 transitions. [2022-07-19 21:48:32,509 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8804500703234881 [2022-07-19 21:48:32,509 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1252 transitions. [2022-07-19 21:48:32,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1252 transitions. [2022-07-19 21:48:32,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:32,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1252 transitions. [2022-07-19 21:48:32,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 139.11111111111111) internal successors, (1252), 9 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:32,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:32,516 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:32,516 INFO L186 Difference]: Start difference. First operand has 161 places, 149 transitions, 450 flow. Second operand 9 states and 1252 transitions. [2022-07-19 21:48:32,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 171 transitions, 611 flow [2022-07-19 21:48:32,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 171 transitions, 601 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:48:32,520 INFO L242 Difference]: Finished difference. Result has 170 places, 157 transitions, 520 flow [2022-07-19 21:48:32,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=520, PETRI_PLACES=170, PETRI_TRANSITIONS=157} [2022-07-19 21:48:32,521 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 28 predicate places. [2022-07-19 21:48:32,522 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 157 transitions, 520 flow [2022-07-19 21:48:32,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 137.875) internal successors, (1103), 8 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:32,522 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:32,523 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 21:48:32,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:32,748 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,SelfDestructingSolverStorable9 [2022-07-19 21:48:32,748 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:48:32,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:32,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1985769086, now seen corresponding path program 1 times [2022-07-19 21:48:32,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:32,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962140834] [2022-07-19 21:48:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:32,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:32,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:48:32,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223266797] [2022-07-19 21:48:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:32,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:32,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:32,773 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:32,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:48:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:32,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:48:32,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:32,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:48:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:33,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:33,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962140834] [2022-07-19 21:48:33,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:48:33,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223266797] [2022-07-19 21:48:33,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223266797] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:33,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:48:33,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-19 21:48:33,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103591892] [2022-07-19 21:48:33,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:33,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 21:48:33,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:33,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 21:48:33,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:48:33,145 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 158 [2022-07-19 21:48:33,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 157 transitions, 520 flow. Second operand has 15 states, 15 states have (on average 137.53333333333333) internal successors, (2063), 15 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,151 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:33,151 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 158 [2022-07-19 21:48:33,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:33,533 INFO L129 PetriNetUnfolder]: 164/1534 cut-off events. [2022-07-19 21:48:33,534 INFO L130 PetriNetUnfolder]: For 663/697 co-relation queries the response was YES. [2022-07-19 21:48:33,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3070 conditions, 1534 events. 164/1534 cut-off events. For 663/697 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 8977 event pairs, 31 based on Foata normal form. 49/1535 useless extension candidates. Maximal degree in co-relation 2537. Up to 107 conditions per place. [2022-07-19 21:48:33,546 INFO L132 encePairwiseOnDemand]: 152/158 looper letters, 56 selfloop transitions, 30 changer transitions 0/215 dead transitions. [2022-07-19 21:48:33,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 215 transitions, 969 flow [2022-07-19 21:48:33,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:48:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:48:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2914 transitions. [2022-07-19 21:48:33,553 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8782399035563593 [2022-07-19 21:48:33,553 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2914 transitions. [2022-07-19 21:48:33,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2914 transitions. [2022-07-19 21:48:33,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:33,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2914 transitions. [2022-07-19 21:48:33,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 138.76190476190476) internal successors, (2914), 21 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,569 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,569 INFO L186 Difference]: Start difference. First operand has 170 places, 157 transitions, 520 flow. Second operand 21 states and 2914 transitions. [2022-07-19 21:48:33,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 215 transitions, 969 flow [2022-07-19 21:48:33,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 215 transitions, 955 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-07-19 21:48:33,577 INFO L242 Difference]: Finished difference. Result has 195 places, 174 transitions, 720 flow [2022-07-19 21:48:33,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=720, PETRI_PLACES=195, PETRI_TRANSITIONS=174} [2022-07-19 21:48:33,578 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 53 predicate places. [2022-07-19 21:48:33,579 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 174 transitions, 720 flow [2022-07-19 21:48:33,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 137.53333333333333) internal successors, (2063), 15 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:33,580 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:33,580 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 21:48:33,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:33,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:33,798 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:48:33,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:33,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2011751188, now seen corresponding path program 1 times [2022-07-19 21:48:33,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:33,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001104180] [2022-07-19 21:48:33,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:33,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:33,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:48:33,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938789425] [2022-07-19 21:48:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:33,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:33,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:33,829 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:33,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:48:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:34,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 21:48:34,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:50:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:50:22,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:50:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:50:38,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:50:38,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001104180] [2022-07-19 21:50:38,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:50:38,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938789425] [2022-07-19 21:50:38,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938789425] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:50:38,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:50:38,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2022-07-19 21:50:38,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966707258] [2022-07-19 21:50:38,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:50:38,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 21:50:38,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:50:38,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 21:50:38,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=369, Unknown=1, NotChecked=0, Total=462 [2022-07-19 21:50:38,126 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 158 [2022-07-19 21:50:38,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 174 transitions, 720 flow. Second operand has 22 states, 22 states have (on average 126.31818181818181) internal successors, (2779), 22 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:50:38,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:50:38,129 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 158 [2022-07-19 21:50:38,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:50:50,432 WARN L233 SmtUtils]: Spent 10.38s on a formula simplification. DAG size of input: 48 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:51:02,348 WARN L233 SmtUtils]: Spent 9.91s on a formula simplification. DAG size of input: 51 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:51:15,917 WARN L233 SmtUtils]: Spent 11.05s on a formula simplification. DAG size of input: 53 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:51:17,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:51:20,211 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:51:22,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:51:24,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:51:37,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:51:41,974 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:51:44,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:51:46,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:51:48,479 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:51:50,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:51:52,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:51:55,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:51:57,684 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-07-19 21:51:59,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:52:01,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:52:04,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 21:52:18,686 WARN L233 SmtUtils]: Spent 9.46s on a formula simplification. DAG size of input: 32 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:52:20,894 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse4 (mod (+ c_~next~0 1) 4294967296)) (.cse0 (mod c_~buffer_size~0 4294967296))) (let ((.cse3 (mod .cse4 .cse0))) (let ((.cse2 (mod .cse3 4294967296))) (let ((.cse1 (< 0 .cse2))) (and (< (mod c_~first~0 4294967296) .cse0) (< (mod (+ |c_t2Thread1of1ForFork1_removeLogElement_#t~post1#1| 1) 4294967296) .cse0) (= |c_ULTIMATE.start_initLog_~max#1| 10) .cse1 (or (not (< .cse2 .cse0)) (and (< 0 (mod (mod (mod (+ .cse3 1) 4294967296) .cse0) 4294967296)) (< .cse4 .cse0)) (not .cse1)) (= c_~buffer_size~0 10) (< 0 (mod c_~next~0 4294967296)) (= |c_ULTIMATE.start_initLog_#in~max#1| 10)))))) is different from false [2022-07-19 21:52:23,313 INFO L129 PetriNetUnfolder]: 185/2378 cut-off events. [2022-07-19 21:52:23,313 INFO L130 PetriNetUnfolder]: For 1121/1135 co-relation queries the response was YES. [2022-07-19 21:52:23,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4678 conditions, 2378 events. 185/2378 cut-off events. For 1121/1135 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 14512 event pairs, 41 based on Foata normal form. 23/2311 useless extension candidates. Maximal degree in co-relation 4609. Up to 166 conditions per place. [2022-07-19 21:52:23,337 INFO L132 encePairwiseOnDemand]: 144/158 looper letters, 42 selfloop transitions, 19 changer transitions 2/207 dead transitions. [2022-07-19 21:52:23,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 207 transitions, 978 flow [2022-07-19 21:52:23,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 21:52:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-19 21:52:23,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2294 transitions. [2022-07-19 21:52:23,342 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8066104078762306 [2022-07-19 21:52:23,342 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2294 transitions. [2022-07-19 21:52:23,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2294 transitions. [2022-07-19 21:52:23,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:52:23,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2294 transitions. [2022-07-19 21:52:23,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 127.44444444444444) internal successors, (2294), 18 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:52:23,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 158.0) internal successors, (3002), 19 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:52:23,353 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 158.0) internal successors, (3002), 19 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:52:23,353 INFO L186 Difference]: Start difference. First operand has 195 places, 174 transitions, 720 flow. Second operand 18 states and 2294 transitions. [2022-07-19 21:52:23,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 207 transitions, 978 flow [2022-07-19 21:52:23,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 207 transitions, 938 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-07-19 21:52:23,365 INFO L242 Difference]: Finished difference. Result has 210 places, 183 transitions, 773 flow [2022-07-19 21:52:23,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=773, PETRI_PLACES=210, PETRI_TRANSITIONS=183} [2022-07-19 21:52:23,366 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 68 predicate places. [2022-07-19 21:52:23,366 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 183 transitions, 773 flow [2022-07-19 21:52:23,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 126.31818181818181) internal successors, (2779), 22 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:52:23,367 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:52:23,368 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 21:52:23,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:52:23,583 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,SelfDestructingSolverStorable11 [2022-07-19 21:52:23,583 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:52:23,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:52:23,584 INFO L85 PathProgramCache]: Analyzing trace with hash -533271126, now seen corresponding path program 1 times [2022-07-19 21:52:23,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:52:23,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71072525] [2022-07-19 21:52:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:52:23,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:52:23,605 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:52:23,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800863345] [2022-07-19 21:52:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:52:23,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:52:23,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:52:23,607 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:52:23,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:52:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:52:24,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-19 21:52:24,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:52:42,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 70 treesize of output 65 [2022-07-19 21:52:42,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 123 [2022-07-19 21:52:42,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 21:53:03,069 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 19 treesize of output 7 [2022-07-19 21:53:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:53:03,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:53:03,967 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 14 treesize of output 12 [2022-07-19 21:53:03,980 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:53:03,981 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 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-19 21:53:04,004 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 13 treesize of output 11 [2022-07-19 21:53:04,020 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:53:04,020 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 1 case distinctions, treesize of input 11 treesize of output 10 [2022-07-19 21:53:04,073 INFO L356 Elim1Store]: treesize reduction 78, result has 24.3 percent of original size [2022-07-19 21:53:04,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 67