./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-queue-add-3.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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:41:38,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:41:38,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:41:38,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:41:38,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:41:38,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:41:38,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:41:38,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:41:38,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:41:38,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:41:38,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:41:38,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:41:38,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:41:38,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:41:38,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:41:38,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:41:38,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:41:38,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:41:38,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:41:38,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:41:38,646 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:41:38,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:41:38,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:41:38,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:41:38,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:41:38,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:41:38,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:41:38,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:41:38,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:41:38,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:41:38,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:41:38,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:41:38,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:41:38,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:41:38,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:41:38,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:41:38,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:41:38,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:41:38,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:41:38,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:41:38,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:41:38,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:41:38,666 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:41:38,693 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:41:38,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:41:38,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:41:38,694 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:41:38,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:41:38,695 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:41:38,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:41:38,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:41:38,696 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:41:38,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:41:38,697 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:41:38,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:41:38,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:41:38,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:41:38,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:41:38,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:41:38,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:41:38,698 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:41:38,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:41:38,699 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:41:38,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:41:38,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:41:38,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:41:38,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:41:38,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:41:38,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:41:38,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:41:38,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:41:38,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:41:38,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:41:38,701 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:41:38,701 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:41:38,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:41:38,701 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2022-07-19 21:41:38,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:41:38,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:41:38,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:41:38,883 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:41:38,884 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:41:38,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-07-19 21:41:38,925 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cec47259/80f3161ce08c4e31b3eee65868e390b3/FLAG581d74b5e [2022-07-19 21:41:39,323 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:41:39,324 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-07-19 21:41:39,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cec47259/80f3161ce08c4e31b3eee65868e390b3/FLAG581d74b5e [2022-07-19 21:41:39,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cec47259/80f3161ce08c4e31b3eee65868e390b3 [2022-07-19 21:41:39,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:41:39,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:41:39,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:41:39,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:41:39,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:41:39,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:41:39" (1/1) ... [2022-07-19 21:41:39,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@204acc8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:39, skipping insertion in model container [2022-07-19 21:41:39,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:41:39" (1/1) ... [2022-07-19 21:41:39,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:41:39,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:41:39,510 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-queue-add-3.wvr.c[3412,3425] [2022-07-19 21:41:39,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:41:39,520 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:41:39,539 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-queue-add-3.wvr.c[3412,3425] [2022-07-19 21:41:39,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:41:39,564 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:41:39,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:39 WrapperNode [2022-07-19 21:41:39,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:41:39,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:41:39,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:41:39,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:41:39,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:39" (1/1) ... [2022-07-19 21:41:39,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:39" (1/1) ... [2022-07-19 21:41:39,608 INFO L137 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2022-07-19 21:41:39,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:41:39,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:41:39,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:41:39,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:41:39,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:39" (1/1) ... [2022-07-19 21:41:39,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:39" (1/1) ... [2022-07-19 21:41:39,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:39" (1/1) ... [2022-07-19 21:41:39,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:39" (1/1) ... [2022-07-19 21:41:39,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:39" (1/1) ... [2022-07-19 21:41:39,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:39" (1/1) ... [2022-07-19 21:41:39,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:39" (1/1) ... [2022-07-19 21:41:39,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:41:39,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:41:39,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:41:39,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:41:39,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:39" (1/1) ... [2022-07-19 21:41:39,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:41:39,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:39,656 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:41:39,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:41:39,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:41:39,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:41:39,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:41:39,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:41:39,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:41:39,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:41:39,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:41:39,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:41:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:41:39,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:41:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:41:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:41:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:41:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:41:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:41:39,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:41:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:41:39,685 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:41:39,748 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:41:39,749 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:41:40,017 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:41:40,124 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:41:40,125 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-19 21:41:40,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:41:40 BoogieIcfgContainer [2022-07-19 21:41:40,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:41:40,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:41:40,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:41:40,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:41:40,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:41:39" (1/3) ... [2022-07-19 21:41:40,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c5a45c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:41:40, skipping insertion in model container [2022-07-19 21:41:40,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:39" (2/3) ... [2022-07-19 21:41:40,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c5a45c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:41:40, skipping insertion in model container [2022-07-19 21:41:40,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:41:40" (3/3) ... [2022-07-19 21:41:40,135 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2022-07-19 21:41:40,140 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:41:40,147 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:41:40,147 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:41:40,147 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:41:40,219 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:41:40,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 203 places, 211 transitions, 446 flow [2022-07-19 21:41:40,300 INFO L129 PetriNetUnfolder]: 18/208 cut-off events. [2022-07-19 21:41:40,315 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:41:40,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 18/208 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 116 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2022-07-19 21:41:40,319 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 211 transitions, 446 flow [2022-07-19 21:41:40,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 197 transitions, 412 flow [2022-07-19 21:41:40,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:41:40,336 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@5873cd3a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3e904514 [2022-07-19 21:41:40,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:41:40,367 INFO L129 PetriNetUnfolder]: 18/196 cut-off events. [2022-07-19 21:41:40,367 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:41:40,367 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:40,368 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] [2022-07-19 21:41:40,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:41:40,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash 322038566, now seen corresponding path program 1 times [2022-07-19 21:41:40,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:40,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809790115] [2022-07-19 21:41:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:40,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:40,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:40,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809790115] [2022-07-19 21:41:40,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809790115] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:40,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:40,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:41:40,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752719011] [2022-07-19 21:41:40,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:40,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:41:40,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:40,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:41:40,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:41:40,691 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 211 [2022-07-19 21:41:40,699 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 197 transitions, 412 flow. Second operand has 2 states, 2 states have (on average 191.0) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:40,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:40,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 211 [2022-07-19 21:41:40,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:40,800 INFO L129 PetriNetUnfolder]: 71/370 cut-off events. [2022-07-19 21:41:40,800 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-07-19 21:41:40,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 370 events. 71/370 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1040 event pairs, 38 based on Foata normal form. 60/393 useless extension candidates. Maximal degree in co-relation 331. Up to 106 conditions per place. [2022-07-19 21:41:40,807 INFO L132 encePairwiseOnDemand]: 198/211 looper letters, 11 selfloop transitions, 0 changer transitions 6/184 dead transitions. [2022-07-19 21:41:40,807 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 184 transitions, 408 flow [2022-07-19 21:41:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:41:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:41:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 396 transitions. [2022-07-19 21:41:40,822 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9383886255924171 [2022-07-19 21:41:40,823 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 396 transitions. [2022-07-19 21:41:40,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 396 transitions. [2022-07-19 21:41:40,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:40,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 396 transitions. [2022-07-19 21:41:40,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 198.0) internal successors, (396), 2 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:40,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:40,841 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:40,843 INFO L186 Difference]: Start difference. First operand has 189 places, 197 transitions, 412 flow. Second operand 2 states and 396 transitions. [2022-07-19 21:41:40,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 184 transitions, 408 flow [2022-07-19 21:41:40,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 184 transitions, 396 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:41:40,851 INFO L242 Difference]: Finished difference. Result has 184 places, 178 transitions, 362 flow [2022-07-19 21:41:40,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=184, PETRI_TRANSITIONS=178} [2022-07-19 21:41:40,856 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -5 predicate places. [2022-07-19 21:41:40,856 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 362 flow [2022-07-19 21:41:40,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 191.0) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:40,857 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:40,857 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, 1, 1, 1, 1] [2022-07-19 21:41:40,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:41:40,858 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:41:40,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:40,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1730877595, now seen corresponding path program 1 times [2022-07-19 21:41:40,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:40,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976089002] [2022-07-19 21:41:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:40,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:41,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:41,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976089002] [2022-07-19 21:41:41,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976089002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:41,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:41,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:41:41,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924581477] [2022-07-19 21:41:41,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:41,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:41:41,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:41,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:41:41,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:41:41,028 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2022-07-19 21:41:41,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 178 transitions, 362 flow. Second operand has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:41,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2022-07-19 21:41:41,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:41,208 INFO L129 PetriNetUnfolder]: 73/448 cut-off events. [2022-07-19 21:41:41,209 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-19 21:41:41,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 448 events. 73/448 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1273 event pairs, 38 based on Foata normal form. 11/424 useless extension candidates. Maximal degree in co-relation 616. Up to 118 conditions per place. [2022-07-19 21:41:41,212 INFO L132 encePairwiseOnDemand]: 199/211 looper letters, 33 selfloop transitions, 8 changer transitions 17/199 dead transitions. [2022-07-19 21:41:41,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 199 transitions, 523 flow [2022-07-19 21:41:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:41:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:41:41,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1501 transitions. [2022-07-19 21:41:41,216 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7904160084254871 [2022-07-19 21:41:41,216 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1501 transitions. [2022-07-19 21:41:41,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1501 transitions. [2022-07-19 21:41:41,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:41,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1501 transitions. [2022-07-19 21:41:41,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,224 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,224 INFO L186 Difference]: Start difference. First operand has 184 places, 178 transitions, 362 flow. Second operand 9 states and 1501 transitions. [2022-07-19 21:41:41,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 199 transitions, 523 flow [2022-07-19 21:41:41,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 199 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:41:41,231 INFO L242 Difference]: Finished difference. Result has 188 places, 179 transitions, 394 flow [2022-07-19 21:41:41,231 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=394, PETRI_PLACES=188, PETRI_TRANSITIONS=179} [2022-07-19 21:41:41,232 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-07-19 21:41:41,242 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 179 transitions, 394 flow [2022-07-19 21:41:41,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,243 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:41,243 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:41,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:41:41,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:41:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:41,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1633722547, now seen corresponding path program 1 times [2022-07-19 21:41:41,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:41,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613095344] [2022-07-19 21:41:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:41,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:41,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:41,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613095344] [2022-07-19 21:41:41,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613095344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:41,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:41,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:41:41,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008641816] [2022-07-19 21:41:41,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:41,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:41:41,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:41,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:41:41,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:41:41,338 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2022-07-19 21:41:41,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 179 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:41,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2022-07-19 21:41:41,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:41,464 INFO L129 PetriNetUnfolder]: 92/476 cut-off events. [2022-07-19 21:41:41,464 INFO L130 PetriNetUnfolder]: For 83/95 co-relation queries the response was YES. [2022-07-19 21:41:41,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 778 conditions, 476 events. 92/476 cut-off events. For 83/95 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1566 event pairs, 50 based on Foata normal form. 15/449 useless extension candidates. Maximal degree in co-relation 772. Up to 115 conditions per place. [2022-07-19 21:41:41,468 INFO L132 encePairwiseOnDemand]: 202/211 looper letters, 36 selfloop transitions, 6 changer transitions 8/191 dead transitions. [2022-07-19 21:41:41,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 191 transitions, 528 flow [2022-07-19 21:41:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:41:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:41:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1171 transitions. [2022-07-19 21:41:41,472 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928232904536222 [2022-07-19 21:41:41,473 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1171 transitions. [2022-07-19 21:41:41,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1171 transitions. [2022-07-19 21:41:41,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:41,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1171 transitions. [2022-07-19 21:41:41,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.28571428571428) internal successors, (1171), 7 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,478 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,479 INFO L186 Difference]: Start difference. First operand has 188 places, 179 transitions, 394 flow. Second operand 7 states and 1171 transitions. [2022-07-19 21:41:41,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 191 transitions, 528 flow [2022-07-19 21:41:41,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 191 transitions, 514 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-19 21:41:41,485 INFO L242 Difference]: Finished difference. Result has 189 places, 180 transitions, 404 flow [2022-07-19 21:41:41,486 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=189, PETRI_TRANSITIONS=180} [2022-07-19 21:41:41,487 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 0 predicate places. [2022-07-19 21:41:41,488 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 180 transitions, 404 flow [2022-07-19 21:41:41,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,489 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:41,489 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:41,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:41:41,489 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:41:41,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:41,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1907862800, now seen corresponding path program 1 times [2022-07-19 21:41:41,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:41,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345383995] [2022-07-19 21:41:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:41,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:41:41,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:41,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345383995] [2022-07-19 21:41:41,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345383995] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:41,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:41,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:41:41,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543868698] [2022-07-19 21:41:41,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:41,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:41:41,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:41,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:41:41,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:41:41,637 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2022-07-19 21:41:41,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 180 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:41,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2022-07-19 21:41:41,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:41,689 INFO L129 PetriNetUnfolder]: 82/405 cut-off events. [2022-07-19 21:41:41,690 INFO L130 PetriNetUnfolder]: For 84/88 co-relation queries the response was YES. [2022-07-19 21:41:41,691 INFO L84 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 405 events. 82/405 cut-off events. For 84/88 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1113 event pairs, 23 based on Foata normal form. 8/390 useless extension candidates. Maximal degree in co-relation 644. Up to 82 conditions per place. [2022-07-19 21:41:41,692 INFO L132 encePairwiseOnDemand]: 208/211 looper letters, 19 selfloop transitions, 2 changer transitions 0/186 dead transitions. [2022-07-19 21:41:41,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 186 transitions, 468 flow [2022-07-19 21:41:41,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:41:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:41:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2022-07-19 21:41:41,694 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8973143759873617 [2022-07-19 21:41:41,694 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2022-07-19 21:41:41,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2022-07-19 21:41:41,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:41,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2022-07-19 21:41:41,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,697 INFO L186 Difference]: Start difference. First operand has 189 places, 180 transitions, 404 flow. Second operand 3 states and 568 transitions. [2022-07-19 21:41:41,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 186 transitions, 468 flow [2022-07-19 21:41:41,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 186 transitions, 458 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:41:41,700 INFO L242 Difference]: Finished difference. Result has 187 places, 181 transitions, 408 flow [2022-07-19 21:41:41,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=408, PETRI_PLACES=187, PETRI_TRANSITIONS=181} [2022-07-19 21:41:41,701 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -2 predicate places. [2022-07-19 21:41:41,702 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 181 transitions, 408 flow [2022-07-19 21:41:41,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,702 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:41,702 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:41,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:41:41,703 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:41:41,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:41,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2022543448, now seen corresponding path program 2 times [2022-07-19 21:41:41,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:41,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303136839] [2022-07-19 21:41:41,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:41,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:41:41,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:41,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303136839] [2022-07-19 21:41:41,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303136839] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:41,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:41,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:41:41,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537824073] [2022-07-19 21:41:41,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:41,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:41:41,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:41,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:41:41,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:41:41,796 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 211 [2022-07-19 21:41:41,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 181 transitions, 408 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:41,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 211 [2022-07-19 21:41:41,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:41,841 INFO L129 PetriNetUnfolder]: 58/347 cut-off events. [2022-07-19 21:41:41,842 INFO L130 PetriNetUnfolder]: For 89/97 co-relation queries the response was YES. [2022-07-19 21:41:41,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 347 events. 58/347 cut-off events. For 89/97 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 800 event pairs, 9 based on Foata normal form. 2/326 useless extension candidates. Maximal degree in co-relation 567. Up to 91 conditions per place. [2022-07-19 21:41:41,844 INFO L132 encePairwiseOnDemand]: 205/211 looper letters, 18 selfloop transitions, 5 changer transitions 0/185 dead transitions. [2022-07-19 21:41:41,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 185 transitions, 468 flow [2022-07-19 21:41:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:41:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:41:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2022-07-19 21:41:41,846 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8846761453396524 [2022-07-19 21:41:41,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2022-07-19 21:41:41,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2022-07-19 21:41:41,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:41,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2022-07-19 21:41:41,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,849 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,849 INFO L186 Difference]: Start difference. First operand has 187 places, 181 transitions, 408 flow. Second operand 3 states and 560 transitions. [2022-07-19 21:41:41,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 185 transitions, 468 flow [2022-07-19 21:41:41,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 185 transitions, 460 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-07-19 21:41:41,853 INFO L242 Difference]: Finished difference. Result has 188 places, 183 transitions, 429 flow [2022-07-19 21:41:41,853 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=429, PETRI_PLACES=188, PETRI_TRANSITIONS=183} [2022-07-19 21:41:41,854 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-07-19 21:41:41,854 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 183 transitions, 429 flow [2022-07-19 21:41:41,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,854 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:41,854 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:41,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:41:41,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:41:41,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:41,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1566264516, now seen corresponding path program 3 times [2022-07-19 21:41:41,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:41,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703775039] [2022-07-19 21:41:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:41,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:41:42,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:42,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703775039] [2022-07-19 21:41:42,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703775039] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:42,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:42,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 21:41:42,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374158810] [2022-07-19 21:41:42,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:42,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 21:41:42,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:42,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 21:41:42,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-19 21:41:42,048 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 211 [2022-07-19 21:41:42,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 183 transitions, 429 flow. Second operand has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:42,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:42,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 211 [2022-07-19 21:41:42,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:42,310 INFO L129 PetriNetUnfolder]: 426/1115 cut-off events. [2022-07-19 21:41:42,310 INFO L130 PetriNetUnfolder]: For 592/604 co-relation queries the response was YES. [2022-07-19 21:41:42,314 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2381 conditions, 1115 events. 426/1115 cut-off events. For 592/604 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6108 event pairs, 103 based on Foata normal form. 1/1038 useless extension candidates. Maximal degree in co-relation 2372. Up to 291 conditions per place. [2022-07-19 21:41:42,319 INFO L132 encePairwiseOnDemand]: 196/211 looper letters, 77 selfloop transitions, 13 changer transitions 9/232 dead transitions. [2022-07-19 21:41:42,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 232 transitions, 788 flow [2022-07-19 21:41:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:41:42,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:41:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1969 transitions. [2022-07-19 21:41:42,322 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7178271965001822 [2022-07-19 21:41:42,322 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1969 transitions. [2022-07-19 21:41:42,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1969 transitions. [2022-07-19 21:41:42,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:42,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1969 transitions. [2022-07-19 21:41:42,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 151.46153846153845) internal successors, (1969), 13 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:42,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:42,354 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:42,354 INFO L186 Difference]: Start difference. First operand has 188 places, 183 transitions, 429 flow. Second operand 13 states and 1969 transitions. [2022-07-19 21:41:42,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 232 transitions, 788 flow [2022-07-19 21:41:42,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 232 transitions, 763 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-19 21:41:42,358 INFO L242 Difference]: Finished difference. Result has 204 places, 189 transitions, 480 flow [2022-07-19 21:41:42,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=480, PETRI_PLACES=204, PETRI_TRANSITIONS=189} [2022-07-19 21:41:42,359 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 15 predicate places. [2022-07-19 21:41:42,360 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 189 transitions, 480 flow [2022-07-19 21:41:42,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:42,360 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:42,361 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:42,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:41:42,361 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:41:42,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:42,361 INFO L85 PathProgramCache]: Analyzing trace with hash -438702336, now seen corresponding path program 1 times [2022-07-19 21:41:42,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:42,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221732362] [2022-07-19 21:41:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:42,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:41:42,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:42,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221732362] [2022-07-19 21:41:42,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221732362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:42,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:42,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:41:42,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837338773] [2022-07-19 21:41:42,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:42,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:41:42,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:42,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:41:42,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:41:42,435 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2022-07-19 21:41:42,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 189 transitions, 480 flow. Second operand has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:42,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:42,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2022-07-19 21:41:42,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:42,547 INFO L129 PetriNetUnfolder]: 191/844 cut-off events. [2022-07-19 21:41:42,547 INFO L130 PetriNetUnfolder]: For 355/387 co-relation queries the response was YES. [2022-07-19 21:41:42,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1608 conditions, 844 events. 191/844 cut-off events. For 355/387 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4643 event pairs, 41 based on Foata normal form. 20/822 useless extension candidates. Maximal degree in co-relation 1594. Up to 132 conditions per place. [2022-07-19 21:41:42,554 INFO L132 encePairwiseOnDemand]: 208/211 looper letters, 31 selfloop transitions, 6 changer transitions 0/207 dead transitions. [2022-07-19 21:41:42,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 207 transitions, 623 flow [2022-07-19 21:41:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:41:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:41:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 761 transitions. [2022-07-19 21:41:42,556 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9016587677725119 [2022-07-19 21:41:42,556 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 761 transitions. [2022-07-19 21:41:42,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 761 transitions. [2022-07-19 21:41:42,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:42,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 761 transitions. [2022-07-19 21:41:42,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:42,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:42,559 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:42,559 INFO L186 Difference]: Start difference. First operand has 204 places, 189 transitions, 480 flow. Second operand 4 states and 761 transitions. [2022-07-19 21:41:42,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 207 transitions, 623 flow [2022-07-19 21:41:42,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 207 transitions, 601 flow, removed 5 selfloop flow, removed 8 redundant places. [2022-07-19 21:41:42,565 INFO L242 Difference]: Finished difference. Result has 198 places, 193 transitions, 511 flow [2022-07-19 21:41:42,565 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=511, PETRI_PLACES=198, PETRI_TRANSITIONS=193} [2022-07-19 21:41:42,566 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 9 predicate places. [2022-07-19 21:41:42,566 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 193 transitions, 511 flow [2022-07-19 21:41:42,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:42,567 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:42,567 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:42,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:41:42,567 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:41:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:42,568 INFO L85 PathProgramCache]: Analyzing trace with hash 402399663, now seen corresponding path program 1 times [2022-07-19 21:41:42,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:42,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569413525] [2022-07-19 21:41:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:42,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:42,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:42,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569413525] [2022-07-19 21:41:42,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569413525] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:42,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267322179] [2022-07-19 21:41:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:42,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:42,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:42,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:42,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:41:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:42,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:41:42,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:43,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:43,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267322179] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:43,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:43,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 21:41:43,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794034191] [2022-07-19 21:41:43,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:43,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:41:43,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:43,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:41:43,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:41:43,214 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 211 [2022-07-19 21:41:43,216 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 193 transitions, 511 flow. Second operand has 19 states, 19 states have (on average 159.42105263157896) internal successors, (3029), 19 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:43,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:43,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 211 [2022-07-19 21:41:43,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:43,587 INFO L129 PetriNetUnfolder]: 288/1435 cut-off events. [2022-07-19 21:41:43,588 INFO L130 PetriNetUnfolder]: For 1329/1413 co-relation queries the response was YES. [2022-07-19 21:41:43,592 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3044 conditions, 1435 events. 288/1435 cut-off events. For 1329/1413 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9702 event pairs, 149 based on Foata normal form. 64/1434 useless extension candidates. Maximal degree in co-relation 3031. Up to 323 conditions per place. [2022-07-19 21:41:43,596 INFO L132 encePairwiseOnDemand]: 195/211 looper letters, 69 selfloop transitions, 23 changer transitions 1/235 dead transitions. [2022-07-19 21:41:43,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 235 transitions, 862 flow [2022-07-19 21:41:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 21:41:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-19 21:41:43,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2731 transitions. [2022-07-19 21:41:43,601 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7613604683579593 [2022-07-19 21:41:43,601 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2731 transitions. [2022-07-19 21:41:43,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2731 transitions. [2022-07-19 21:41:43,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:43,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2731 transitions. [2022-07-19 21:41:43,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 160.64705882352942) internal successors, (2731), 17 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:43,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 211.0) internal successors, (3798), 18 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:43,612 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 211.0) internal successors, (3798), 18 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:43,613 INFO L186 Difference]: Start difference. First operand has 198 places, 193 transitions, 511 flow. Second operand 17 states and 2731 transitions. [2022-07-19 21:41:43,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 235 transitions, 862 flow [2022-07-19 21:41:43,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 235 transitions, 850 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-19 21:41:43,620 INFO L242 Difference]: Finished difference. Result has 220 places, 204 transitions, 618 flow [2022-07-19 21:41:43,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=618, PETRI_PLACES=220, PETRI_TRANSITIONS=204} [2022-07-19 21:41:43,621 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 31 predicate places. [2022-07-19 21:41:43,621 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 204 transitions, 618 flow [2022-07-19 21:41:43,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.42105263157896) internal successors, (3029), 19 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:43,622 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:43,622 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:43,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 21:41:43,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:43,842 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:41:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:43,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1732290429, now seen corresponding path program 1 times [2022-07-19 21:41:43,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:43,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707336049] [2022-07-19 21:41:43,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:43,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:41:43,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:43,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707336049] [2022-07-19 21:41:43,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707336049] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:43,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296451979] [2022-07-19 21:41:43,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:43,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:43,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:43,917 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:43,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:41:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:44,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:41:44,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:41:44,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:41:44,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296451979] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:44,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:44,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 21:41:44,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341169648] [2022-07-19 21:41:44,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:44,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:41:44,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:44,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:41:44,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:41:44,333 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 211 [2022-07-19 21:41:44,344 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 204 transitions, 618 flow. Second operand has 19 states, 19 states have (on average 159.57894736842104) internal successors, (3032), 19 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:44,344 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:44,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 211 [2022-07-19 21:41:44,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:44,757 INFO L129 PetriNetUnfolder]: 329/1728 cut-off events. [2022-07-19 21:41:44,757 INFO L130 PetriNetUnfolder]: For 1391/1456 co-relation queries the response was YES. [2022-07-19 21:41:44,763 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3623 conditions, 1728 events. 329/1728 cut-off events. For 1391/1456 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12448 event pairs, 183 based on Foata normal form. 37/1680 useless extension candidates. Maximal degree in co-relation 3603. Up to 439 conditions per place. [2022-07-19 21:41:44,768 INFO L132 encePairwiseOnDemand]: 198/211 looper letters, 68 selfloop transitions, 23 changer transitions 2/235 dead transitions. [2022-07-19 21:41:44,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 235 transitions, 941 flow [2022-07-19 21:41:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:41:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:41:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2096 transitions. [2022-07-19 21:41:44,772 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7641268683922713 [2022-07-19 21:41:44,772 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2096 transitions. [2022-07-19 21:41:44,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2096 transitions. [2022-07-19 21:41:44,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:44,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2096 transitions. [2022-07-19 21:41:44,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 161.23076923076923) internal successors, (2096), 13 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:44,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:44,784 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:44,784 INFO L186 Difference]: Start difference. First operand has 220 places, 204 transitions, 618 flow. Second operand 13 states and 2096 transitions. [2022-07-19 21:41:44,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 235 transitions, 941 flow [2022-07-19 21:41:44,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 235 transitions, 915 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-07-19 21:41:44,790 INFO L242 Difference]: Finished difference. Result has 234 places, 212 transitions, 721 flow [2022-07-19 21:41:44,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=721, PETRI_PLACES=234, PETRI_TRANSITIONS=212} [2022-07-19 21:41:44,791 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 45 predicate places. [2022-07-19 21:41:44,791 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 212 transitions, 721 flow [2022-07-19 21:41:44,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.57894736842104) internal successors, (3032), 19 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:44,792 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:44,793 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:44,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:45,010 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,SelfDestructingSolverStorable8 [2022-07-19 21:41:45,010 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:41:45,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash 567606463, now seen corresponding path program 2 times [2022-07-19 21:41:45,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:45,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973476358] [2022-07-19 21:41:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:45,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:45,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:45,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973476358] [2022-07-19 21:41:45,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973476358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:45,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856640188] [2022-07-19 21:41:45,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:41:45,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:45,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:45,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:45,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:41:45,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:41:45,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:45,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-19 21:41:45,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:46,409 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 21:41:46,410 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 23 treesize of output 10 [2022-07-19 21:41:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:46,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:46,574 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:41:46,575 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 25 treesize of output 16 [2022-07-19 21:41:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:47,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856640188] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:47,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:47,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 45 [2022-07-19 21:41:47,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571607679] [2022-07-19 21:41:47,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:47,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 21:41:47,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 21:41:47,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 21:41:47,485 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 211 [2022-07-19 21:41:47,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 212 transitions, 721 flow. Second operand has 45 states, 45 states have (on average 107.35555555555555) internal successors, (4831), 45 states have internal predecessors, (4831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:47,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:47,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 211 [2022-07-19 21:41:47,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:52,960 INFO L129 PetriNetUnfolder]: 8052/21529 cut-off events. [2022-07-19 21:41:52,960 INFO L130 PetriNetUnfolder]: For 21806/22617 co-relation queries the response was YES. [2022-07-19 21:41:53,055 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49595 conditions, 21529 events. 8052/21529 cut-off events. For 21806/22617 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 236431 event pairs, 1892 based on Foata normal form. 103/20732 useless extension candidates. Maximal degree in co-relation 49569. Up to 3824 conditions per place. [2022-07-19 21:41:53,125 INFO L132 encePairwiseOnDemand]: 172/211 looper letters, 383 selfloop transitions, 195 changer transitions 7/679 dead transitions. [2022-07-19 21:41:53,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 679 transitions, 3911 flow [2022-07-19 21:41:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-19 21:41:53,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-19 21:41:53,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 7027 transitions. [2022-07-19 21:41:53,137 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.520364336492891 [2022-07-19 21:41:53,137 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 7027 transitions. [2022-07-19 21:41:53,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 7027 transitions. [2022-07-19 21:41:53,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:53,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 7027 transitions. [2022-07-19 21:41:53,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 109.796875) internal successors, (7027), 64 states have internal predecessors, (7027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:53,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 211.0) internal successors, (13715), 65 states have internal predecessors, (13715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:53,169 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 211.0) internal successors, (13715), 65 states have internal predecessors, (13715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:53,169 INFO L186 Difference]: Start difference. First operand has 234 places, 212 transitions, 721 flow. Second operand 64 states and 7027 transitions. [2022-07-19 21:41:53,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 679 transitions, 3911 flow [2022-07-19 21:41:53,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 679 transitions, 3862 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-07-19 21:41:53,193 INFO L242 Difference]: Finished difference. Result has 317 places, 417 transitions, 2441 flow [2022-07-19 21:41:53,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=2441, PETRI_PLACES=317, PETRI_TRANSITIONS=417} [2022-07-19 21:41:53,195 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 128 predicate places. [2022-07-19 21:41:53,195 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 417 transitions, 2441 flow [2022-07-19 21:41:53,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 107.35555555555555) internal successors, (4831), 45 states have internal predecessors, (4831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:53,197 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:53,197 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:53,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:53,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:53,415 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:41:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:53,416 INFO L85 PathProgramCache]: Analyzing trace with hash -832418055, now seen corresponding path program 3 times [2022-07-19 21:41:53,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:53,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709395986] [2022-07-19 21:41:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:53,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:54,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:54,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709395986] [2022-07-19 21:41:54,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709395986] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:54,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042720276] [2022-07-19 21:41:54,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:41:54,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:54,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:54,065 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:54,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:41:54,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:41:54,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:54,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:41:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:54,507 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 21:41:54,508 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 23 treesize of output 10 [2022-07-19 21:41:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 21:41:54,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:54,571 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:41:54,571 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 25 treesize of output 16 [2022-07-19 21:41:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 21:41:54,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042720276] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:54,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:54,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 5, 5] total 25 [2022-07-19 21:41:54,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351853657] [2022-07-19 21:41:54,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:54,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 21:41:54,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:54,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 21:41:54,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-07-19 21:41:54,829 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 211 [2022-07-19 21:41:54,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 417 transitions, 2441 flow. Second operand has 25 states, 25 states have (on average 108.72) internal successors, (2718), 25 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:54,831 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:54,831 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 211 [2022-07-19 21:41:54,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:00,876 INFO L129 PetriNetUnfolder]: 9108/24396 cut-off events. [2022-07-19 21:42:00,877 INFO L130 PetriNetUnfolder]: For 198224/202550 co-relation queries the response was YES. [2022-07-19 21:42:01,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105175 conditions, 24396 events. 9108/24396 cut-off events. For 198224/202550 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 276015 event pairs, 3263 based on Foata normal form. 421/24370 useless extension candidates. Maximal degree in co-relation 105124. Up to 10411 conditions per place. [2022-07-19 21:42:01,179 INFO L132 encePairwiseOnDemand]: 180/211 looper letters, 353 selfloop transitions, 102 changer transitions 0/549 dead transitions. [2022-07-19 21:42:01,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 549 transitions, 4423 flow [2022-07-19 21:42:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 21:42:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-19 21:42:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4191 transitions. [2022-07-19 21:42:01,184 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5092963908129785 [2022-07-19 21:42:01,184 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4191 transitions. [2022-07-19 21:42:01,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4191 transitions. [2022-07-19 21:42:01,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:01,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4191 transitions. [2022-07-19 21:42:01,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 107.46153846153847) internal successors, (4191), 39 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:01,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 211.0) internal successors, (8440), 40 states have internal predecessors, (8440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:01,197 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 211.0) internal successors, (8440), 40 states have internal predecessors, (8440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:01,197 INFO L186 Difference]: Start difference. First operand has 317 places, 417 transitions, 2441 flow. Second operand 39 states and 4191 transitions. [2022-07-19 21:42:01,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 549 transitions, 4423 flow [2022-07-19 21:42:01,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 549 transitions, 4188 flow, removed 96 selfloop flow, removed 16 redundant places. [2022-07-19 21:42:01,461 INFO L242 Difference]: Finished difference. Result has 344 places, 451 transitions, 2864 flow [2022-07-19 21:42:01,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2864, PETRI_PLACES=344, PETRI_TRANSITIONS=451} [2022-07-19 21:42:01,462 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 155 predicate places. [2022-07-19 21:42:01,462 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 451 transitions, 2864 flow [2022-07-19 21:42:01,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 108.72) internal successors, (2718), 25 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:01,463 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:01,463 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:42:01,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:42:01,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:01,683 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:42:01,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:01,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1280105239, now seen corresponding path program 4 times [2022-07-19 21:42:01,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:01,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200527591] [2022-07-19 21:42:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:01,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:42:02,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:02,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200527591] [2022-07-19 21:42:02,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200527591] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:42:02,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412753183] [2022-07-19 21:42:02,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:42:02,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:02,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:42:02,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:42:02,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:42:02,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:42:02,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:42:02,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-19 21:42:02,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:42:02,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:42:02,496 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:42:02,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 21:42:03,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-19 21:42:03,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 21:42:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:42:03,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:42:03,458 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:42:03,459 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 45 treesize of output 45 [2022-07-19 21:42:03,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-07-19 21:42:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:42:04,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412753183] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:42:04,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:42:04,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 59 [2022-07-19 21:42:04,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291231346] [2022-07-19 21:42:04,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:42:04,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-19 21:42:04,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:42:04,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-19 21:42:04,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=3138, Unknown=0, NotChecked=0, Total=3422 [2022-07-19 21:42:04,857 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 211 [2022-07-19 21:42:04,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 451 transitions, 2864 flow. Second operand has 59 states, 59 states have (on average 120.30508474576271) internal successors, (7098), 59 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:04,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:42:04,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 211 [2022-07-19 21:42:04,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:23,661 INFO L129 PetriNetUnfolder]: 27396/71392 cut-off events. [2022-07-19 21:42:23,661 INFO L130 PetriNetUnfolder]: For 688215/701584 co-relation queries the response was YES. [2022-07-19 21:42:24,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 310242 conditions, 71392 events. 27396/71392 cut-off events. For 688215/701584 co-relation queries the response was YES. Maximal size of possible extension queue 2678. Compared 934140 event pairs, 3167 based on Foata normal form. 2570/72725 useless extension candidates. Maximal degree in co-relation 310186. Up to 12248 conditions per place. [2022-07-19 21:42:25,002 INFO L132 encePairwiseOnDemand]: 172/211 looper letters, 971 selfloop transitions, 434 changer transitions 24/1536 dead transitions. [2022-07-19 21:42:25,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1536 transitions, 15608 flow [2022-07-19 21:42:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-19 21:42:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-07-19 21:42:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 11117 transitions. [2022-07-19 21:42:25,015 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5789802614447164 [2022-07-19 21:42:25,016 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 11117 transitions. [2022-07-19 21:42:25,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 11117 transitions. [2022-07-19 21:42:25,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:25,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 11117 transitions. [2022-07-19 21:42:25,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 122.16483516483517) internal successors, (11117), 91 states have internal predecessors, (11117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:25,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 211.0) internal successors, (19412), 92 states have internal predecessors, (19412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:25,057 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 211.0) internal successors, (19412), 92 states have internal predecessors, (19412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:25,057 INFO L186 Difference]: Start difference. First operand has 344 places, 451 transitions, 2864 flow. Second operand 91 states and 11117 transitions. [2022-07-19 21:42:25,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1536 transitions, 15608 flow [2022-07-19 21:42:25,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1536 transitions, 15401 flow, removed 64 selfloop flow, removed 32 redundant places. [2022-07-19 21:42:25,982 INFO L242 Difference]: Finished difference. Result has 430 places, 836 transitions, 7012 flow [2022-07-19 21:42:25,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=7012, PETRI_PLACES=430, PETRI_TRANSITIONS=836} [2022-07-19 21:42:25,984 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 241 predicate places. [2022-07-19 21:42:25,984 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 836 transitions, 7012 flow [2022-07-19 21:42:25,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 120.30508474576271) internal successors, (7098), 59 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:25,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:25,985 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:42:26,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:42:26,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 21:42:26,186 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:42:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:26,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2072074159, now seen corresponding path program 5 times [2022-07-19 21:42:26,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:26,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407593858] [2022-07-19 21:42:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:26,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:42:27,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:27,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407593858] [2022-07-19 21:42:27,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407593858] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:42:27,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903175722] [2022-07-19 21:42:27,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:42:27,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:27,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:42:27,048 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:42:27,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:42:27,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:42:27,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:42:27,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 21:42:27,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:42:27,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:42:27,173 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-19 21:42:27,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-19 21:42:27,313 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-19 21:42:27,313 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 16 treesize of output 18 [2022-07-19 21:42:27,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-19 21:42:27,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-19 21:42:27,822 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 21:42:27,827 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 23 treesize of output 10 [2022-07-19 21:42:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 21:42:27,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:42:27,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903175722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:42:27,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:42:27,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [30] total 42 [2022-07-19 21:42:27,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388816742] [2022-07-19 21:42:27,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:42:27,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:42:27,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:42:27,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:42:27,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1577, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 21:42:27,849 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 211 [2022-07-19 21:42:27,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 836 transitions, 7012 flow. Second operand has 14 states, 14 states have (on average 142.71428571428572) internal successors, (1998), 14 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:27,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:42:27,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 211 [2022-07-19 21:42:27,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand