./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:15:58,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:15:58,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:15:58,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:15:58,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:15:58,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:15:58,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:15:58,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:15:58,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:15:58,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:15:58,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:15:58,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:15:58,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:15:58,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:15:58,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:15:58,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:15:58,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:15:58,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:15:58,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:15:58,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:15:58,820 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:15:58,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:15:58,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:15:58,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:15:58,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:15:58,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:15:58,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:15:58,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:15:58,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:15:58,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:15:58,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:15:58,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:15:58,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:15:58,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:15:58,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:15:58,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:15:58,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:15:58,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:15:58,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:15:58,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:15:58,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:15:58,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:15:58,854 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:15:58,878 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:15:58,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:15:58,879 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:15:58,879 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:15:58,880 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:15:58,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:15:58,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:15:58,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:15:58,881 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:15:58,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:15:58,882 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:15:58,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:15:58,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:15:58,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:15:58,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:15:58,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:15:58,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:15:58,883 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:15:58,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:15:58,883 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:15:58,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:15:58,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:15:58,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:15:58,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:15:58,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:15:58,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:15:58,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:15:58,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:15:58,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:15:58,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:15:58,885 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:15:58,885 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:15:58,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:15:58,885 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2022-07-21 09:15:59,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:15:59,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:15:59,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:15:59,192 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:15:59,193 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:15:59,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-07-21 09:15:59,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78bd23723/15344c24a70d4ecf9183a1607f38c3be/FLAG05dc66e34 [2022-07-21 09:15:59,582 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:15:59,582 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-07-21 09:15:59,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78bd23723/15344c24a70d4ecf9183a1607f38c3be/FLAG05dc66e34 [2022-07-21 09:15:59,991 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78bd23723/15344c24a70d4ecf9183a1607f38c3be [2022-07-21 09:15:59,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:15:59,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:15:59,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:15:59,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:16:00,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:16:00,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:15:59" (1/1) ... [2022-07-21 09:16:00,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a81806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:00, skipping insertion in model container [2022-07-21 09:16:00,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:15:59" (1/1) ... [2022-07-21 09:16:00,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:16:00,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:16:00,170 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2022-07-21 09:16:00,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:16:00,208 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:16:00,253 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2022-07-21 09:16:00,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:16:00,265 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:16:00,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:00 WrapperNode [2022-07-21 09:16:00,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:16:00,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:16:00,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:16:00,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:16:00,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:00" (1/1) ... [2022-07-21 09:16:00,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:00" (1/1) ... [2022-07-21 09:16:00,292 INFO L137 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 200 [2022-07-21 09:16:00,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:16:00,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:16:00,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:16:00,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:16:00,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:00" (1/1) ... [2022-07-21 09:16:00,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:00" (1/1) ... [2022-07-21 09:16:00,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:00" (1/1) ... [2022-07-21 09:16:00,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:00" (1/1) ... [2022-07-21 09:16:00,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:00" (1/1) ... [2022-07-21 09:16:00,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:00" (1/1) ... [2022-07-21 09:16:00,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:00" (1/1) ... [2022-07-21 09:16:00,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:16:00,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:16:00,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:16:00,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:16:00,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:00" (1/1) ... [2022-07-21 09:16:00,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:16:00,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:00,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:16:00,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:16:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:16:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:16:00,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:16:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:16:00,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:16:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:16:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:16:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:16:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:16:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:16:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:16:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:16:00,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:16:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:16:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:16:00,389 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:16:00,475 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:16:00,477 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:16:00,783 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:16:00,890 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:16:00,891 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 09:16:00,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:16:00 BoogieIcfgContainer [2022-07-21 09:16:00,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:16:00,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:16:00,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:16:00,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:16:00,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:15:59" (1/3) ... [2022-07-21 09:16:00,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307d5dd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:16:00, skipping insertion in model container [2022-07-21 09:16:00,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:00" (2/3) ... [2022-07-21 09:16:00,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307d5dd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:16:00, skipping insertion in model container [2022-07-21 09:16:00,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:16:00" (3/3) ... [2022-07-21 09:16:00,900 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2022-07-21 09:16:00,907 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:16:00,915 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:16:00,915 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:16:00,916 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:16:00,971 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:16:01,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 172 places, 178 transitions, 372 flow [2022-07-21 09:16:01,060 INFO L129 PetriNetUnfolder]: 13/176 cut-off events. [2022-07-21 09:16:01,060 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:16:01,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 13/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2022-07-21 09:16:01,063 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 178 transitions, 372 flow [2022-07-21 09:16:01,067 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 167 transitions, 346 flow [2022-07-21 09:16:01,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:16:01,079 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@1eafe188, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@32606e3f [2022-07-21 09:16:01,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:16:01,110 INFO L129 PetriNetUnfolder]: 13/166 cut-off events. [2022-07-21 09:16:01,110 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:16:01,110 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:01,111 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:01,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:01,116 INFO L85 PathProgramCache]: Analyzing trace with hash -174858074, now seen corresponding path program 1 times [2022-07-21 09:16:01,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:01,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103247367] [2022-07-21 09:16:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:01,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:01,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:01,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103247367] [2022-07-21 09:16:01,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103247367] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:01,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:01,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:16:01,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947644300] [2022-07-21 09:16:01,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:01,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:16:01,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:01,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:16:01,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:16:01,432 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 178 [2022-07-21 09:16:01,436 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 167 transitions, 346 flow. Second operand has 2 states, 2 states have (on average 162.5) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:01,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:01,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 178 [2022-07-21 09:16:01,437 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:01,497 INFO L129 PetriNetUnfolder]: 17/189 cut-off events. [2022-07-21 09:16:01,497 INFO L130 PetriNetUnfolder]: For 17/20 co-relation queries the response was YES. [2022-07-21 09:16:01,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 189 events. 17/189 cut-off events. For 17/20 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 196 event pairs, 8 based on Foata normal form. 15/191 useless extension candidates. Maximal degree in co-relation 137. Up to 25 conditions per place. [2022-07-21 09:16:01,500 INFO L132 encePairwiseOnDemand]: 169/178 looper letters, 8 selfloop transitions, 0 changer transitions 5/158 dead transitions. [2022-07-21 09:16:01,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 158 transitions, 344 flow [2022-07-21 09:16:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:16:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:16:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 337 transitions. [2022-07-21 09:16:01,513 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9466292134831461 [2022-07-21 09:16:01,514 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 337 transitions. [2022-07-21 09:16:01,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 337 transitions. [2022-07-21 09:16:01,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:01,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 337 transitions. [2022-07-21 09:16:01,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 168.5) internal successors, (337), 2 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:01,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:01,528 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:01,529 INFO L186 Difference]: Start difference. First operand has 161 places, 167 transitions, 346 flow. Second operand 2 states and 337 transitions. [2022-07-21 09:16:01,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 158 transitions, 344 flow [2022-07-21 09:16:01,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 158 transitions, 336 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:16:01,538 INFO L242 Difference]: Finished difference. Result has 158 places, 153 transitions, 310 flow [2022-07-21 09:16:01,540 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=310, PETRI_PLACES=158, PETRI_TRANSITIONS=153} [2022-07-21 09:16:01,542 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, -3 predicate places. [2022-07-21 09:16:01,543 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 153 transitions, 310 flow [2022-07-21 09:16:01,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 162.5) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:01,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:01,543 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:01,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:16:01,543 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:01,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:01,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1666625947, now seen corresponding path program 1 times [2022-07-21 09:16:01,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:01,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888360326] [2022-07-21 09:16:01,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:01,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:01,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:01,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888360326] [2022-07-21 09:16:01,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888360326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:01,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:01,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:16:01,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006840276] [2022-07-21 09:16:01,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:01,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:16:01,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:01,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:16:01,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:16:01,830 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 178 [2022-07-21 09:16:01,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 153 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:01,831 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:01,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 178 [2022-07-21 09:16:01,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:01,992 INFO L129 PetriNetUnfolder]: 112/418 cut-off events. [2022-07-21 09:16:01,992 INFO L130 PetriNetUnfolder]: For 20/33 co-relation queries the response was YES. [2022-07-21 09:16:01,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 418 events. 112/418 cut-off events. For 20/33 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1477 event pairs, 33 based on Foata normal form. 3/374 useless extension candidates. Maximal degree in co-relation 673. Up to 120 conditions per place. [2022-07-21 09:16:01,994 INFO L132 encePairwiseOnDemand]: 171/178 looper letters, 59 selfloop transitions, 5 changer transitions 4/183 dead transitions. [2022-07-21 09:16:01,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 183 transitions, 511 flow [2022-07-21 09:16:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:16:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:16:01,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 819 transitions. [2022-07-21 09:16:01,996 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7668539325842697 [2022-07-21 09:16:01,996 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 819 transitions. [2022-07-21 09:16:01,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 819 transitions. [2022-07-21 09:16:01,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:01,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 819 transitions. [2022-07-21 09:16:01,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.5) internal successors, (819), 6 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:01,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,000 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,000 INFO L186 Difference]: Start difference. First operand has 158 places, 153 transitions, 310 flow. Second operand 6 states and 819 transitions. [2022-07-21 09:16:02,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 183 transitions, 511 flow [2022-07-21 09:16:02,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 183 transitions, 511 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:16:02,003 INFO L242 Difference]: Finished difference. Result has 161 places, 156 transitions, 339 flow [2022-07-21 09:16:02,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=161, PETRI_TRANSITIONS=156} [2022-07-21 09:16:02,004 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 0 predicate places. [2022-07-21 09:16:02,004 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 156 transitions, 339 flow [2022-07-21 09:16:02,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,005 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:02,005 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:02,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:16:02,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:02,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1017288057, now seen corresponding path program 1 times [2022-07-21 09:16:02,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:02,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181427305] [2022-07-21 09:16:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:02,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:02,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:02,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181427305] [2022-07-21 09:16:02,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181427305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:02,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:02,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:16:02,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264339832] [2022-07-21 09:16:02,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:02,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:16:02,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:02,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:16:02,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:16:02,091 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2022-07-21 09:16:02,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 156 transitions, 339 flow. Second operand has 5 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:02,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2022-07-21 09:16:02,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:02,171 INFO L129 PetriNetUnfolder]: 109/423 cut-off events. [2022-07-21 09:16:02,171 INFO L130 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-07-21 09:16:02,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 423 events. 109/423 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1573 event pairs, 48 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 706. Up to 117 conditions per place. [2022-07-21 09:16:02,173 INFO L132 encePairwiseOnDemand]: 168/178 looper letters, 37 selfloop transitions, 11 changer transitions 4/184 dead transitions. [2022-07-21 09:16:02,173 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 184 transitions, 515 flow [2022-07-21 09:16:02,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:16:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:16:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 789 transitions. [2022-07-21 09:16:02,175 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8865168539325843 [2022-07-21 09:16:02,175 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 789 transitions. [2022-07-21 09:16:02,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 789 transitions. [2022-07-21 09:16:02,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:02,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 789 transitions. [2022-07-21 09:16:02,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,178 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,178 INFO L186 Difference]: Start difference. First operand has 161 places, 156 transitions, 339 flow. Second operand 5 states and 789 transitions. [2022-07-21 09:16:02,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 184 transitions, 515 flow [2022-07-21 09:16:02,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 184 transitions, 511 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-21 09:16:02,181 INFO L242 Difference]: Finished difference. Result has 163 places, 160 transitions, 392 flow [2022-07-21 09:16:02,181 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=163, PETRI_TRANSITIONS=160} [2022-07-21 09:16:02,182 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 2 predicate places. [2022-07-21 09:16:02,182 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 160 transitions, 392 flow [2022-07-21 09:16:02,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,182 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:02,182 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:02,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:16:02,183 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:02,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:02,183 INFO L85 PathProgramCache]: Analyzing trace with hash 76398777, now seen corresponding path program 2 times [2022-07-21 09:16:02,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:02,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932467569] [2022-07-21 09:16:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:02,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:02,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:02,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932467569] [2022-07-21 09:16:02,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932467569] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:02,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:02,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:16:02,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277891158] [2022-07-21 09:16:02,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:02,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:16:02,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:02,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:16:02,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:16:02,278 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2022-07-21 09:16:02,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 160 transitions, 392 flow. Second operand has 6 states, 6 states have (on average 149.66666666666666) internal successors, (898), 6 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:02,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2022-07-21 09:16:02,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:02,412 INFO L129 PetriNetUnfolder]: 91/366 cut-off events. [2022-07-21 09:16:02,413 INFO L130 PetriNetUnfolder]: For 116/126 co-relation queries the response was YES. [2022-07-21 09:16:02,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 366 events. 91/366 cut-off events. For 116/126 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1172 event pairs, 28 based on Foata normal form. 12/370 useless extension candidates. Maximal degree in co-relation 682. Up to 116 conditions per place. [2022-07-21 09:16:02,415 INFO L132 encePairwiseOnDemand]: 170/178 looper letters, 33 selfloop transitions, 7 changer transitions 6/178 dead transitions. [2022-07-21 09:16:02,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 178 transitions, 532 flow [2022-07-21 09:16:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:16:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:16:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 929 transitions. [2022-07-21 09:16:02,418 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8698501872659176 [2022-07-21 09:16:02,418 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 929 transitions. [2022-07-21 09:16:02,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 929 transitions. [2022-07-21 09:16:02,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:02,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 929 transitions. [2022-07-21 09:16:02,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.83333333333334) internal successors, (929), 6 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,424 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,424 INFO L186 Difference]: Start difference. First operand has 163 places, 160 transitions, 392 flow. Second operand 6 states and 929 transitions. [2022-07-21 09:16:02,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 178 transitions, 532 flow [2022-07-21 09:16:02,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 178 transitions, 518 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:16:02,428 INFO L242 Difference]: Finished difference. Result has 166 places, 158 transitions, 385 flow [2022-07-21 09:16:02,428 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=166, PETRI_TRANSITIONS=158} [2022-07-21 09:16:02,430 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 5 predicate places. [2022-07-21 09:16:02,430 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 158 transitions, 385 flow [2022-07-21 09:16:02,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.66666666666666) internal successors, (898), 6 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,431 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:02,431 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:02,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:16:02,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:02,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:02,431 INFO L85 PathProgramCache]: Analyzing trace with hash -373622335, now seen corresponding path program 1 times [2022-07-21 09:16:02,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:02,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909598583] [2022-07-21 09:16:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:02,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:02,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:02,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909598583] [2022-07-21 09:16:02,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909598583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:02,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:02,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:16:02,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626038072] [2022-07-21 09:16:02,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:02,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:16:02,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:02,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:16:02,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:16:02,522 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 178 [2022-07-21 09:16:02,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 158 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:02,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 178 [2022-07-21 09:16:02,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:02,604 INFO L129 PetriNetUnfolder]: 31/275 cut-off events. [2022-07-21 09:16:02,604 INFO L130 PetriNetUnfolder]: For 53/59 co-relation queries the response was YES. [2022-07-21 09:16:02,604 INFO L84 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 275 events. 31/275 cut-off events. For 53/59 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 560 event pairs, 14 based on Foata normal form. 5/271 useless extension candidates. Maximal degree in co-relation 462. Up to 56 conditions per place. [2022-07-21 09:16:02,605 INFO L132 encePairwiseOnDemand]: 169/178 looper letters, 35 selfloop transitions, 6 changer transitions 4/166 dead transitions. [2022-07-21 09:16:02,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 166 transitions, 493 flow [2022-07-21 09:16:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:16:02,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:16:02,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 982 transitions. [2022-07-21 09:16:02,607 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7881219903691814 [2022-07-21 09:16:02,607 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 982 transitions. [2022-07-21 09:16:02,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 982 transitions. [2022-07-21 09:16:02,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:02,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 982 transitions. [2022-07-21 09:16:02,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.28571428571428) internal successors, (982), 7 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,611 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,611 INFO L186 Difference]: Start difference. First operand has 166 places, 158 transitions, 385 flow. Second operand 7 states and 982 transitions. [2022-07-21 09:16:02,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 166 transitions, 493 flow [2022-07-21 09:16:02,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 166 transitions, 473 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-21 09:16:02,615 INFO L242 Difference]: Finished difference. Result has 170 places, 159 transitions, 389 flow [2022-07-21 09:16:02,616 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=389, PETRI_PLACES=170, PETRI_TRANSITIONS=159} [2022-07-21 09:16:02,617 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 9 predicate places. [2022-07-21 09:16:02,617 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 159 transitions, 389 flow [2022-07-21 09:16:02,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,618 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:02,618 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:02,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:16:02,618 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2085282566, now seen corresponding path program 1 times [2022-07-21 09:16:02,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:02,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091348885] [2022-07-21 09:16:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:02,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:16:02,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091348885] [2022-07-21 09:16:02,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091348885] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378278004] [2022-07-21 09:16:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:02,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:02,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:02,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:16:02,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:16:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:02,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:16:02,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:16:03,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:16:03,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378278004] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:03,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:03,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-21 09:16:03,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860433768] [2022-07-21 09:16:03,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:03,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:16:03,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:03,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:16:03,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:16:03,343 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2022-07-21 09:16:03,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 159 transitions, 389 flow. Second operand has 11 states, 11 states have (on average 150.9090909090909) internal successors, (1660), 11 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:03,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:03,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2022-07-21 09:16:03,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:03,483 INFO L129 PetriNetUnfolder]: 110/441 cut-off events. [2022-07-21 09:16:03,483 INFO L130 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-07-21 09:16:03,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 441 events. 110/441 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1473 event pairs, 20 based on Foata normal form. 7/444 useless extension candidates. Maximal degree in co-relation 861. Up to 70 conditions per place. [2022-07-21 09:16:03,485 INFO L132 encePairwiseOnDemand]: 170/178 looper letters, 58 selfloop transitions, 19 changer transitions 0/210 dead transitions. [2022-07-21 09:16:03,485 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 210 transitions, 713 flow [2022-07-21 09:16:03,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:16:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:16:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1843 transitions. [2022-07-21 09:16:03,488 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8628277153558053 [2022-07-21 09:16:03,488 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1843 transitions. [2022-07-21 09:16:03,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1843 transitions. [2022-07-21 09:16:03,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:03,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1843 transitions. [2022-07-21 09:16:03,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.58333333333334) internal successors, (1843), 12 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:03,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:03,495 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:03,495 INFO L186 Difference]: Start difference. First operand has 170 places, 159 transitions, 389 flow. Second operand 12 states and 1843 transitions. [2022-07-21 09:16:03,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 210 transitions, 713 flow [2022-07-21 09:16:03,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 210 transitions, 703 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:16:03,498 INFO L242 Difference]: Finished difference. Result has 181 places, 170 transitions, 498 flow [2022-07-21 09:16:03,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=498, PETRI_PLACES=181, PETRI_TRANSITIONS=170} [2022-07-21 09:16:03,499 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 20 predicate places. [2022-07-21 09:16:03,499 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 170 transitions, 498 flow [2022-07-21 09:16:03,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 150.9090909090909) internal successors, (1660), 11 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:03,500 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:03,500 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:03,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 09:16:03,715 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,SelfDestructingSolverStorable5 [2022-07-21 09:16:03,716 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:03,716 INFO L85 PathProgramCache]: Analyzing trace with hash -17716140, now seen corresponding path program 1 times [2022-07-21 09:16:03,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:03,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744143203] [2022-07-21 09:16:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:03,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:16:03,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:03,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744143203] [2022-07-21 09:16:03,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744143203] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:03,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:03,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:16:03,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942417837] [2022-07-21 09:16:03,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:03,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:16:03,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:03,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:16:03,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:16:03,775 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 178 [2022-07-21 09:16:03,776 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 170 transitions, 498 flow. Second operand has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:03,776 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:03,776 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 178 [2022-07-21 09:16:03,776 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:03,869 INFO L129 PetriNetUnfolder]: 46/388 cut-off events. [2022-07-21 09:16:03,869 INFO L130 PetriNetUnfolder]: For 233/236 co-relation queries the response was YES. [2022-07-21 09:16:03,869 INFO L84 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 388 events. 46/388 cut-off events. For 233/236 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1000 event pairs, 21 based on Foata normal form. 4/381 useless extension candidates. Maximal degree in co-relation 737. Up to 90 conditions per place. [2022-07-21 09:16:03,870 INFO L132 encePairwiseOnDemand]: 167/178 looper letters, 40 selfloop transitions, 8 changer transitions 17/191 dead transitions. [2022-07-21 09:16:03,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 191 transitions, 682 flow [2022-07-21 09:16:03,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:16:03,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:16:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1262 transitions. [2022-07-21 09:16:03,872 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.787765293383271 [2022-07-21 09:16:03,872 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1262 transitions. [2022-07-21 09:16:03,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1262 transitions. [2022-07-21 09:16:03,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:03,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1262 transitions. [2022-07-21 09:16:03,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 140.22222222222223) internal successors, (1262), 9 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:03,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:03,879 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:03,879 INFO L186 Difference]: Start difference. First operand has 181 places, 170 transitions, 498 flow. Second operand 9 states and 1262 transitions. [2022-07-21 09:16:03,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 191 transitions, 682 flow [2022-07-21 09:16:03,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 191 transitions, 645 flow, removed 12 selfloop flow, removed 4 redundant places. [2022-07-21 09:16:03,884 INFO L242 Difference]: Finished difference. Result has 187 places, 171 transitions, 491 flow [2022-07-21 09:16:03,884 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=491, PETRI_PLACES=187, PETRI_TRANSITIONS=171} [2022-07-21 09:16:03,884 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 26 predicate places. [2022-07-21 09:16:03,884 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 171 transitions, 491 flow [2022-07-21 09:16:03,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:03,885 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:03,885 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:03,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:16:03,885 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:03,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:03,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1730991474, now seen corresponding path program 1 times [2022-07-21 09:16:03,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:03,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684507920] [2022-07-21 09:16:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:03,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:06,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:06,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684507920] [2022-07-21 09:16:06,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684507920] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:06,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496145555] [2022-07-21 09:16:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:06,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:06,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:06,213 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:16:06,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:16:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:06,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-21 09:16:06,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:08,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:16:08,982 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 09:16:08,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 18 [2022-07-21 09:16:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:09,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:09,922 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:09,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 78 treesize of output 138 [2022-07-21 09:16:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:12,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496145555] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:12,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:12,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 31] total 103 [2022-07-21 09:16:12,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473217226] [2022-07-21 09:16:12,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:12,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-07-21 09:16:12,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:12,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-07-21 09:16:12,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=9487, Unknown=0, NotChecked=0, Total=10506 [2022-07-21 09:16:12,973 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 178 [2022-07-21 09:16:12,977 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 171 transitions, 491 flow. Second operand has 103 states, 103 states have (on average 66.63106796116504) internal successors, (6863), 103 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:12,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:12,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 178 [2022-07-21 09:16:12,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:23,273 INFO L129 PetriNetUnfolder]: 734/1762 cut-off events. [2022-07-21 09:16:23,273 INFO L130 PetriNetUnfolder]: For 1211/1211 co-relation queries the response was YES. [2022-07-21 09:16:23,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4487 conditions, 1762 events. 734/1762 cut-off events. For 1211/1211 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10548 event pairs, 94 based on Foata normal form. 32/1784 useless extension candidates. Maximal degree in co-relation 4470. Up to 515 conditions per place. [2022-07-21 09:16:23,283 INFO L132 encePairwiseOnDemand]: 123/178 looper letters, 283 selfloop transitions, 160 changer transitions 40/537 dead transitions. [2022-07-21 09:16:23,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 537 transitions, 2706 flow [2022-07-21 09:16:23,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-07-21 09:16:23,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2022-07-21 09:16:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 7063 transitions. [2022-07-21 09:16:23,296 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3852405367077561 [2022-07-21 09:16:23,297 INFO L72 ComplementDD]: Start complementDD. Operand 103 states and 7063 transitions. [2022-07-21 09:16:23,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 7063 transitions. [2022-07-21 09:16:23,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:23,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 103 states and 7063 transitions. [2022-07-21 09:16:23,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 104 states, 103 states have (on average 68.57281553398059) internal successors, (7063), 103 states have internal predecessors, (7063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 104 states, 104 states have (on average 178.0) internal successors, (18512), 104 states have internal predecessors, (18512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,344 INFO L81 ComplementDD]: Finished complementDD. Result has 104 states, 104 states have (on average 178.0) internal successors, (18512), 104 states have internal predecessors, (18512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,344 INFO L186 Difference]: Start difference. First operand has 187 places, 171 transitions, 491 flow. Second operand 103 states and 7063 transitions. [2022-07-21 09:16:23,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 537 transitions, 2706 flow [2022-07-21 09:16:23,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 537 transitions, 2610 flow, removed 23 selfloop flow, removed 7 redundant places. [2022-07-21 09:16:23,358 INFO L242 Difference]: Finished difference. Result has 336 places, 307 transitions, 1668 flow [2022-07-21 09:16:23,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=1668, PETRI_PLACES=336, PETRI_TRANSITIONS=307} [2022-07-21 09:16:23,360 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 175 predicate places. [2022-07-21 09:16:23,360 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 307 transitions, 1668 flow [2022-07-21 09:16:23,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 66.63106796116504) internal successors, (6863), 103 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,362 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:23,362 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:23,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:23,579 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,SelfDestructingSolverStorable7 [2022-07-21 09:16:23,580 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:23,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:23,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1965360992, now seen corresponding path program 2 times [2022-07-21 09:16:23,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:23,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926494763] [2022-07-21 09:16:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:23,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:26,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:26,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926494763] [2022-07-21 09:16:26,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926494763] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:26,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334999374] [2022-07-21 09:16:26,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:16:26,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:26,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:26,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:16:26,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:16:26,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:16:26,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:26,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-21 09:16:26,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:27,679 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 15 treesize of output 11 [2022-07-21 09:16:28,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:16:28,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:16:28,647 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:28,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 36 [2022-07-21 09:16:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:28,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:32,679 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:32,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 138 [2022-07-21 09:16:32,720 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:32,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 770 treesize of output 774 [2022-07-21 09:16:32,765 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:32,766 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 666 treesize of output 684 [2022-07-21 09:16:32,806 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:32,806 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 588 treesize of output 528 [2022-07-21 09:16:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:56,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334999374] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:56,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:56,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 39, 36] total 112 [2022-07-21 09:16:56,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303059279] [2022-07-21 09:16:56,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:56,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-07-21 09:16:56,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:56,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-07-21 09:16:56,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1222, Invalid=11175, Unknown=35, NotChecked=0, Total=12432 [2022-07-21 09:16:56,038 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 178 [2022-07-21 09:16:56,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 307 transitions, 1668 flow. Second operand has 112 states, 112 states have (on average 55.580357142857146) internal successors, (6225), 112 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:56,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:56,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 178 [2022-07-21 09:16:56,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:20,943 INFO L129 PetriNetUnfolder]: 2489/5211 cut-off events. [2022-07-21 09:17:20,943 INFO L130 PetriNetUnfolder]: For 24638/24638 co-relation queries the response was YES. [2022-07-21 09:17:20,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22948 conditions, 5211 events. 2489/5211 cut-off events. For 24638/24638 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40811 event pairs, 71 based on Foata normal form. 17/5206 useless extension candidates. Maximal degree in co-relation 22878. Up to 922 conditions per place. [2022-07-21 09:17:20,995 INFO L132 encePairwiseOnDemand]: 118/178 looper letters, 603 selfloop transitions, 737 changer transitions 19/1406 dead transitions. [2022-07-21 09:17:20,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 1406 transitions, 12511 flow [2022-07-21 09:17:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2022-07-21 09:17:20,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2022-07-21 09:17:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 13101 transitions. [2022-07-21 09:17:21,014 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3256686884756886 [2022-07-21 09:17:21,014 INFO L72 ComplementDD]: Start complementDD. Operand 226 states and 13101 transitions. [2022-07-21 09:17:21,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 226 states and 13101 transitions. [2022-07-21 09:17:21,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:21,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 226 states and 13101 transitions. [2022-07-21 09:17:21,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 227 states, 226 states have (on average 57.969026548672566) internal successors, (13101), 226 states have internal predecessors, (13101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 227 states, 227 states have (on average 178.0) internal successors, (40406), 227 states have internal predecessors, (40406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,089 INFO L81 ComplementDD]: Finished complementDD. Result has 227 states, 227 states have (on average 178.0) internal successors, (40406), 227 states have internal predecessors, (40406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,089 INFO L186 Difference]: Start difference. First operand has 336 places, 307 transitions, 1668 flow. Second operand 226 states and 13101 transitions. [2022-07-21 09:17:21,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 1406 transitions, 12511 flow [2022-07-21 09:17:21,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1406 transitions, 12012 flow, removed 218 selfloop flow, removed 25 redundant places. [2022-07-21 09:17:21,224 INFO L242 Difference]: Finished difference. Result has 552 places, 1007 transitions, 8774 flow [2022-07-21 09:17:21,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=226, PETRI_FLOW=8774, PETRI_PLACES=552, PETRI_TRANSITIONS=1007} [2022-07-21 09:17:21,225 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 391 predicate places. [2022-07-21 09:17:21,225 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 1007 transitions, 8774 flow [2022-07-21 09:17:21,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 55.580357142857146) internal successors, (6225), 112 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,226 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:21,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:17:21,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 09:17:21,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:21,440 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:21,440 INFO L85 PathProgramCache]: Analyzing trace with hash 146228680, now seen corresponding path program 3 times [2022-07-21 09:17:21,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:21,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256111016] [2022-07-21 09:17:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:21,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:25,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:25,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256111016] [2022-07-21 09:17:25,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256111016] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:25,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539927497] [2022-07-21 09:17:25,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:17:25,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:25,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:25,579 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:17:25,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:17:25,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:17:25,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:17:25,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-21 09:17:25,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:27,490 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 15 treesize of output 11 [2022-07-21 09:17:27,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:17:28,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:17:28,187 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 29 treesize of output 29 [2022-07-21 09:17:28,584 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:17:28,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 36 [2022-07-21 09:17:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:28,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:32,908 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:17:32,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 121 [2022-07-21 09:17:32,992 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:17:32,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 638 treesize of output 674 [2022-07-21 09:17:33,031 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:17:33,032 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 566 treesize of output 608 [2022-07-21 09:17:33,063 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:17:33,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 494 treesize of output 446 [2022-07-21 09:17:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:45,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539927497] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:45,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:45,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 40] total 123 [2022-07-21 09:17:45,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800415038] [2022-07-21 09:17:45,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:45,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-07-21 09:17:45,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:45,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-07-21 09:17:45,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=14181, Unknown=14, NotChecked=0, Total=15006 [2022-07-21 09:17:45,476 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 178 [2022-07-21 09:17:45,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 1007 transitions, 8774 flow. Second operand has 123 states, 123 states have (on average 56.292682926829265) internal successors, (6924), 123 states have internal predecessors, (6924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:45,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:45,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 178 [2022-07-21 09:17:45,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:14,835 INFO L129 PetriNetUnfolder]: 4430/8736 cut-off events. [2022-07-21 09:18:14,835 INFO L130 PetriNetUnfolder]: For 71274/71283 co-relation queries the response was YES. [2022-07-21 09:18:14,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49835 conditions, 8736 events. 4430/8736 cut-off events. For 71274/71283 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 74530 event pairs, 103 based on Foata normal form. 16/8726 useless extension candidates. Maximal degree in co-relation 49748. Up to 1626 conditions per place. [2022-07-21 09:18:14,948 INFO L132 encePairwiseOnDemand]: 116/178 looper letters, 604 selfloop transitions, 1636 changer transitions 22/2310 dead transitions. [2022-07-21 09:18:14,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 742 places, 2310 transitions, 27144 flow [2022-07-21 09:18:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-07-21 09:18:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2022-07-21 09:18:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 11549 transitions. [2022-07-21 09:18:14,959 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3276869821813642 [2022-07-21 09:18:14,960 INFO L72 ComplementDD]: Start complementDD. Operand 198 states and 11549 transitions. [2022-07-21 09:18:14,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 198 states and 11549 transitions. [2022-07-21 09:18:14,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:14,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 198 states and 11549 transitions. [2022-07-21 09:18:14,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 199 states, 198 states have (on average 58.32828282828283) internal successors, (11549), 198 states have internal predecessors, (11549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:15,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 199 states, 199 states have (on average 178.0) internal successors, (35422), 199 states have internal predecessors, (35422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:15,009 INFO L81 ComplementDD]: Finished complementDD. Result has 199 states, 199 states have (on average 178.0) internal successors, (35422), 199 states have internal predecessors, (35422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:15,009 INFO L186 Difference]: Start difference. First operand has 552 places, 1007 transitions, 8774 flow. Second operand 198 states and 11549 transitions. [2022-07-21 09:18:15,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 742 places, 2310 transitions, 27144 flow [2022-07-21 09:18:16,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 2310 transitions, 22012 flow, removed 2420 selfloop flow, removed 66 redundant places. [2022-07-21 09:18:16,834 INFO L242 Difference]: Finished difference. Result has 725 places, 1962 transitions, 19439 flow [2022-07-21 09:18:16,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=724, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=198, PETRI_FLOW=19439, PETRI_PLACES=725, PETRI_TRANSITIONS=1962} [2022-07-21 09:18:16,836 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 564 predicate places. [2022-07-21 09:18:16,836 INFO L495 AbstractCegarLoop]: Abstraction has has 725 places, 1962 transitions, 19439 flow [2022-07-21 09:18:16,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 56.292682926829265) internal successors, (6924), 123 states have internal predecessors, (6924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:16,837 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:16,838 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:18:16,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:18:17,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:17,056 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:17,057 INFO L85 PathProgramCache]: Analyzing trace with hash 48866768, now seen corresponding path program 4 times [2022-07-21 09:18:17,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:17,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791464576] [2022-07-21 09:18:17,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:17,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:20,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:20,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791464576] [2022-07-21 09:18:20,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791464576] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:18:20,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499672157] [2022-07-21 09:18:20,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:18:20,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:20,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:18:20,336 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:18:20,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:18:20,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:18:20,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:18:20,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-21 09:18:20,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:18:22,375 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 15 treesize of output 11 [2022-07-21 09:18:22,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:18:23,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:18:23,154 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 29 treesize of output 29 [2022-07-21 09:18:23,422 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:18:23,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 34 [2022-07-21 09:18:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:23,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:18:27,431 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:18:27,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 121 [2022-07-21 09:18:27,466 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:18:27,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 556 treesize of output 600 [2022-07-21 09:18:27,493 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:18:27,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 468 treesize of output 432 [2022-07-21 09:18:27,533 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:18:27,533 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 408 treesize of output 456 [2022-07-21 09:20:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:05,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499672157] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:20:05,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:20:05,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 40, 40] total 117 [2022-07-21 09:20:05,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439697148] [2022-07-21 09:20:05,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:20:05,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-07-21 09:20:05,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:05,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-07-21 09:20:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=12801, Unknown=25, NotChecked=0, Total=13572 [2022-07-21 09:20:05,507 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 178 [2022-07-21 09:20:05,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 725 places, 1962 transitions, 19439 flow. Second operand has 117 states, 117 states have (on average 52.51282051282051) internal successors, (6144), 117 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:05,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:05,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 178 [2022-07-21 09:20:05,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand