./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-three-array-sum.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-three-array-sum.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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:43:16,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:43:16,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:43:16,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:43:16,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:43:16,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:43:16,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:43:16,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:43:16,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:43:16,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:43:16,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:43:16,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:43:16,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:43:16,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:43:16,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:43:16,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:43:16,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:43:16,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:43:16,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:43:16,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:43:16,827 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:43:16,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:43:16,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:43:16,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:43:16,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:43:16,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:43:16,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:43:16,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:43:16,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:43:16,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:43:16,839 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:43:16,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:43:16,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:43:16,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:43:16,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:43:16,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:43:16,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:43:16,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:43:16,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:43:16,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:43:16,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:43:16,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:43:16,847 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:43:16,877 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:43:16,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:43:16,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:43:16,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:43:16,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:43:16,878 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:43:16,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:43:16,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:43:16,879 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:43:16,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:43:16,880 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:43:16,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:43:16,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:43:16,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:43:16,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:43:16,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:43:16,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:43:16,881 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:43:16,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:43:16,882 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:43:16,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:43:16,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:43:16,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:43:16,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:43:16,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:43:16,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:43:16,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:43:16,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:43:16,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:43:16,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:43:16,884 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:43:16,884 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:43:16,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:43:16,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 [2022-07-19 21:43:17,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:43:17,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:43:17,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:43:17,131 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:43:17,131 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:43:17,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-07-19 21:43:17,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96e5d3e96/80516e34ac5342cb97fb889827bc41b5/FLAG4eb05e364 [2022-07-19 21:43:17,625 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:43:17,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-07-19 21:43:17,631 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96e5d3e96/80516e34ac5342cb97fb889827bc41b5/FLAG4eb05e364 [2022-07-19 21:43:18,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96e5d3e96/80516e34ac5342cb97fb889827bc41b5 [2022-07-19 21:43:18,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:43:18,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:43:18,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:43:18,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:43:18,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:43:18,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:43:18" (1/1) ... [2022-07-19 21:43:18,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a9f5d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:43:18, skipping insertion in model container [2022-07-19 21:43:18,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:43:18" (1/1) ... [2022-07-19 21:43:18,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:43:18,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:43:18,203 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-three-array-sum.wvr.c[2691,2704] [2022-07-19 21:43:18,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:43:18,224 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:43:18,261 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-three-array-sum.wvr.c[2691,2704] [2022-07-19 21:43:18,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:43:18,280 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:43:18,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:43:18 WrapperNode [2022-07-19 21:43:18,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:43:18,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:43:18,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:43:18,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:43:18,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:43:18" (1/1) ... [2022-07-19 21:43:18,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:43:18" (1/1) ... [2022-07-19 21:43:18,329 INFO L137 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 150 [2022-07-19 21:43:18,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:43:18,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:43:18,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:43:18,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:43:18,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:43:18" (1/1) ... [2022-07-19 21:43:18,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:43:18" (1/1) ... [2022-07-19 21:43:18,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:43:18" (1/1) ... [2022-07-19 21:43:18,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:43:18" (1/1) ... [2022-07-19 21:43:18,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:43:18" (1/1) ... [2022-07-19 21:43:18,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:43:18" (1/1) ... [2022-07-19 21:43:18,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:43:18" (1/1) ... [2022-07-19 21:43:18,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:43:18,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:43:18,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:43:18,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:43:18,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:43:18" (1/1) ... [2022-07-19 21:43:18,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:43:18,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:43:18,420 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 21:43:18,444 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 21:43:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:43:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:43:18,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:43:18,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:43:18,466 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:43:18,466 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:43:18,466 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:43:18,466 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:43:18,466 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:43:18,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:43:18,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:43:18,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:43:18,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:43:18,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:43:18,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:43:18,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:43:18,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:43:18,469 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 21:43:18,585 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:43:18,587 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:43:18,921 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:43:18,947 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:43:18,948 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-19 21:43:18,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:43:18 BoogieIcfgContainer [2022-07-19 21:43:18,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:43:18,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:43:18,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:43:18,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:43:18,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:43:18" (1/3) ... [2022-07-19 21:43:18,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6b1cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:43:18, skipping insertion in model container [2022-07-19 21:43:18,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:43:18" (2/3) ... [2022-07-19 21:43:18,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6b1cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:43:18, skipping insertion in model container [2022-07-19 21:43:18,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:43:18" (3/3) ... [2022-07-19 21:43:18,957 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2022-07-19 21:43:18,961 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:43:18,969 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:43:18,969 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:43:18,969 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:43:19,029 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:43:19,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 218 places, 228 transitions, 480 flow [2022-07-19 21:43:19,129 INFO L129 PetriNetUnfolder]: 20/225 cut-off events. [2022-07-19 21:43:19,129 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:43:19,134 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 225 events. 20/225 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 148 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 184. Up to 3 conditions per place. [2022-07-19 21:43:19,134 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 228 transitions, 480 flow [2022-07-19 21:43:19,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 214 transitions, 446 flow [2022-07-19 21:43:19,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:43:19,154 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@3e8f1b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69f81b52 [2022-07-19 21:43:19,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:43:19,194 INFO L129 PetriNetUnfolder]: 20/213 cut-off events. [2022-07-19 21:43:19,195 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:43:19,195 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:43:19,196 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:43:19,196 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 21:43:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:43:19,201 INFO L85 PathProgramCache]: Analyzing trace with hash -504584022, now seen corresponding path program 1 times [2022-07-19 21:43:19,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:43:19,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333267465] [2022-07-19 21:43:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:19,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:43:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:19,397 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 21:43:19,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:43:19,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333267465] [2022-07-19 21:43:19,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333267465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:43:19,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:43:19,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:43:19,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280579988] [2022-07-19 21:43:19,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:43:19,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:43:19,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:43:19,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:43:19,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:43:19,433 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 228 [2022-07-19 21:43:19,436 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 214 transitions, 446 flow. Second operand has 2 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 21:43:19,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:43:19,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 228 [2022-07-19 21:43:19,437 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:43:19,490 INFO L129 PetriNetUnfolder]: 20/247 cut-off events. [2022-07-19 21:43:19,490 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-07-19 21:43:19,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 247 events. 20/247 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 322 event pairs, 7 based on Foata normal form. 31/258 useless extension candidates. Maximal degree in co-relation 176. Up to 28 conditions per place. [2022-07-19 21:43:19,493 INFO L132 encePairwiseOnDemand]: 215/228 looper letters, 8 selfloop transitions, 0 changer transitions 7/201 dead transitions. [2022-07-19 21:43:19,494 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 201 transitions, 436 flow [2022-07-19 21:43:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:43:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:43:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 433 transitions. [2022-07-19 21:43:19,513 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9495614035087719 [2022-07-19 21:43:19,515 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 433 transitions. [2022-07-19 21:43:19,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 433 transitions. [2022-07-19 21:43:19,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:43:19,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 433 transitions. [2022-07-19 21:43:19,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 216.5) internal successors, (433), 2 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:19,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states 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 21:43:19,529 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states 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 21:43:19,530 INFO L186 Difference]: Start difference. First operand has 204 places, 214 transitions, 446 flow. Second operand 2 states and 433 transitions. [2022-07-19 21:43:19,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 201 transitions, 436 flow [2022-07-19 21:43:19,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 201 transitions, 424 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:43:19,538 INFO L242 Difference]: Finished difference. Result has 199 places, 194 transitions, 394 flow [2022-07-19 21:43:19,540 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=394, PETRI_PLACES=199, PETRI_TRANSITIONS=194} [2022-07-19 21:43:19,543 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, -5 predicate places. [2022-07-19 21:43:19,543 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 194 transitions, 394 flow [2022-07-19 21:43:19,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 21:43:19,544 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:43:19,544 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:43:19,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:43:19,544 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 21:43:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:43:19,545 INFO L85 PathProgramCache]: Analyzing trace with hash -343539870, now seen corresponding path program 1 times [2022-07-19 21:43:19,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:43:19,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513414547] [2022-07-19 21:43:19,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:19,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:43:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:19,917 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 21:43:19,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:43:19,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513414547] [2022-07-19 21:43:19,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513414547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:43:19,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:43:19,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:43:19,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116994603] [2022-07-19 21:43:19,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:43:19,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:43:19,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:43:19,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:43:19,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:43:19,925 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 228 [2022-07-19 21:43:19,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 194 transitions, 394 flow. Second operand has 7 states, 7 states have (on average 171.28571428571428) internal successors, (1199), 7 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states 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 21:43:19,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:43:19,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 228 [2022-07-19 21:43:19,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:43:20,113 INFO L129 PetriNetUnfolder]: 70/452 cut-off events. [2022-07-19 21:43:20,113 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-19 21:43:20,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 452 events. 70/452 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1486 event pairs, 17 based on Foata normal form. 1/413 useless extension candidates. Maximal degree in co-relation 590. Up to 62 conditions per place. [2022-07-19 21:43:20,120 INFO L132 encePairwiseOnDemand]: 220/228 looper letters, 52 selfloop transitions, 6 changer transitions 4/215 dead transitions. [2022-07-19 21:43:20,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 215 transitions, 568 flow [2022-07-19 21:43:20,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:43:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:43:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1225 transitions. [2022-07-19 21:43:20,128 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7675438596491229 [2022-07-19 21:43:20,128 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1225 transitions. [2022-07-19 21:43:20,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1225 transitions. [2022-07-19 21:43:20,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:43:20,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1225 transitions. [2022-07-19 21:43:20,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states 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 21:43:20,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states 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 21:43:20,147 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states 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 21:43:20,147 INFO L186 Difference]: Start difference. First operand has 199 places, 194 transitions, 394 flow. Second operand 7 states and 1225 transitions. [2022-07-19 21:43:20,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 215 transitions, 568 flow [2022-07-19 21:43:20,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 215 transitions, 568 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:43:20,157 INFO L242 Difference]: Finished difference. Result has 201 places, 197 transitions, 425 flow [2022-07-19 21:43:20,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=425, PETRI_PLACES=201, PETRI_TRANSITIONS=197} [2022-07-19 21:43:20,158 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, -3 predicate places. [2022-07-19 21:43:20,159 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 197 transitions, 425 flow [2022-07-19 21:43:20,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 171.28571428571428) internal successors, (1199), 7 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states 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 21:43:20,160 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:43:20,160 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] [2022-07-19 21:43:20,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:43:20,161 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 21:43:20,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:43:20,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1180149095, now seen corresponding path program 1 times [2022-07-19 21:43:20,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:43:20,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309515272] [2022-07-19 21:43:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:20,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:43:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:43:20,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:43:20,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309515272] [2022-07-19 21:43:20,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309515272] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:43:20,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:43:20,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:43:20,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819885933] [2022-07-19 21:43:20,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:43:20,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:43:20,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:43:20,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:43:20,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:43:20,373 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 228 [2022-07-19 21:43:20,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 197 transitions, 425 flow. Second operand has 7 states, 7 states have (on average 163.85714285714286) internal successors, (1147), 7 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states 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 21:43:20,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:43:20,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 228 [2022-07-19 21:43:20,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:43:20,943 INFO L129 PetriNetUnfolder]: 1164/2746 cut-off events. [2022-07-19 21:43:20,943 INFO L130 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2022-07-19 21:43:20,951 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4703 conditions, 2746 events. 1164/2746 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17632 event pairs, 581 based on Foata normal form. 0/2087 useless extension candidates. Maximal degree in co-relation 4696. Up to 1051 conditions per place. [2022-07-19 21:43:20,963 INFO L132 encePairwiseOnDemand]: 209/228 looper letters, 120 selfloop transitions, 28 changer transitions 0/288 dead transitions. [2022-07-19 21:43:20,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 288 transitions, 919 flow [2022-07-19 21:43:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:43:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:43:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1887 transitions. [2022-07-19 21:43:20,968 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7523923444976076 [2022-07-19 21:43:20,968 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1887 transitions. [2022-07-19 21:43:20,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1887 transitions. [2022-07-19 21:43:20,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:43:20,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1887 transitions. [2022-07-19 21:43:20,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 171.54545454545453) internal successors, (1887), 11 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:20,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 228.0) internal successors, (2736), 12 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states 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 21:43:20,980 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 228.0) internal successors, (2736), 12 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states 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 21:43:20,980 INFO L186 Difference]: Start difference. First operand has 201 places, 197 transitions, 425 flow. Second operand 11 states and 1887 transitions. [2022-07-19 21:43:20,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 288 transitions, 919 flow [2022-07-19 21:43:20,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 288 transitions, 913 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-19 21:43:20,986 INFO L242 Difference]: Finished difference. Result has 210 places, 214 transitions, 552 flow [2022-07-19 21:43:20,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=552, PETRI_PLACES=210, PETRI_TRANSITIONS=214} [2022-07-19 21:43:20,987 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 6 predicate places. [2022-07-19 21:43:20,988 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 214 transitions, 552 flow [2022-07-19 21:43:20,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 163.85714285714286) internal successors, (1147), 7 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states 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 21:43:20,988 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:43:20,989 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] [2022-07-19 21:43:20,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:43:20,989 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 21:43:20,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:43:20,990 INFO L85 PathProgramCache]: Analyzing trace with hash -83321624, now seen corresponding path program 1 times [2022-07-19 21:43:20,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:43:20,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445501539] [2022-07-19 21:43:20,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:20,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:43:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:43:21,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:43:21,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445501539] [2022-07-19 21:43:21,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445501539] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:43:21,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:43:21,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:43:21,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700002558] [2022-07-19 21:43:21,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:43:21,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:43:21,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:43:21,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:43:21,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:43:21,149 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 228 [2022-07-19 21:43:21,151 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 214 transitions, 552 flow. Second operand has 7 states, 7 states have (on average 162.85714285714286) internal successors, (1140), 7 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 21:43:21,151 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:43:21,151 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 228 [2022-07-19 21:43:21,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:43:21,696 INFO L129 PetriNetUnfolder]: 894/2275 cut-off events. [2022-07-19 21:43:21,696 INFO L130 PetriNetUnfolder]: For 585/615 co-relation queries the response was YES. [2022-07-19 21:43:21,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4196 conditions, 2275 events. 894/2275 cut-off events. For 585/615 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 13675 event pairs, 481 based on Foata normal form. 30/1960 useless extension candidates. Maximal degree in co-relation 4186. Up to 1093 conditions per place. [2022-07-19 21:43:21,710 INFO L132 encePairwiseOnDemand]: 209/228 looper letters, 56 selfloop transitions, 14 changer transitions 77/286 dead transitions. [2022-07-19 21:43:21,710 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 286 transitions, 1018 flow [2022-07-19 21:43:21,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:43:21,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:43:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1873 transitions. [2022-07-19 21:43:21,714 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7468102073365231 [2022-07-19 21:43:21,714 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1873 transitions. [2022-07-19 21:43:21,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1873 transitions. [2022-07-19 21:43:21,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:43:21,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1873 transitions. [2022-07-19 21:43:21,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 170.27272727272728) internal successors, (1873), 11 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states 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 21:43:21,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 228.0) internal successors, (2736), 12 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states 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 21:43:21,727 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 228.0) internal successors, (2736), 12 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states 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 21:43:21,727 INFO L186 Difference]: Start difference. First operand has 210 places, 214 transitions, 552 flow. Second operand 11 states and 1873 transitions. [2022-07-19 21:43:21,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 286 transitions, 1018 flow [2022-07-19 21:43:21,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 286 transitions, 1013 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:43:21,736 INFO L242 Difference]: Finished difference. Result has 222 places, 200 transitions, 512 flow [2022-07-19 21:43:21,742 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=512, PETRI_PLACES=222, PETRI_TRANSITIONS=200} [2022-07-19 21:43:21,743 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 18 predicate places. [2022-07-19 21:43:21,743 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 200 transitions, 512 flow [2022-07-19 21:43:21,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.85714285714286) internal successors, (1140), 7 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 21:43:21,744 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:43:21,744 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, 1, 1] [2022-07-19 21:43:21,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:43:21,744 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 21:43:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:43:21,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1346727361, now seen corresponding path program 1 times [2022-07-19 21:43:21,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:43:21,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669760772] [2022-07-19 21:43:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:21,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:43:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:43:21,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:43:21,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669760772] [2022-07-19 21:43:21,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669760772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:43:21,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218043158] [2022-07-19 21:43:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:21,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:43:21,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:43:21,916 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 21:43:21,917 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 21:43:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:22,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:43:22,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:43:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:43:22,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:43:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:43:22,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218043158] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:43:22,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:43:22,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-19 21:43:22,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639511788] [2022-07-19 21:43:22,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:43:22,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:43:22,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:43:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:43:22,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:43:22,617 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 228 [2022-07-19 21:43:22,618 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 200 transitions, 512 flow. Second operand has 7 states, 7 states have (on average 164.14285714285714) internal successors, (1149), 7 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states 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 21:43:22,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:43:22,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 228 [2022-07-19 21:43:22,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:43:22,859 INFO L129 PetriNetUnfolder]: 635/1510 cut-off events. [2022-07-19 21:43:22,860 INFO L130 PetriNetUnfolder]: For 625/625 co-relation queries the response was YES. [2022-07-19 21:43:22,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2991 conditions, 1510 events. 635/1510 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8349 event pairs, 273 based on Foata normal form. 29/1312 useless extension candidates. Maximal degree in co-relation 2977. Up to 603 conditions per place. [2022-07-19 21:43:22,872 INFO L132 encePairwiseOnDemand]: 220/228 looper letters, 65 selfloop transitions, 7 changer transitions 0/211 dead transitions. [2022-07-19 21:43:22,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 211 transitions, 693 flow [2022-07-19 21:43:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:43:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:43:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1167 transitions. [2022-07-19 21:43:22,876 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.731203007518797 [2022-07-19 21:43:22,876 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1167 transitions. [2022-07-19 21:43:22,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1167 transitions. [2022-07-19 21:43:22,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:43:22,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1167 transitions. [2022-07-19 21:43:22,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.71428571428572) internal successors, (1167), 7 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states 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 21:43:22,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states 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 21:43:22,882 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states 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 21:43:22,882 INFO L186 Difference]: Start difference. First operand has 222 places, 200 transitions, 512 flow. Second operand 7 states and 1167 transitions. [2022-07-19 21:43:22,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 211 transitions, 693 flow [2022-07-19 21:43:22,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 211 transitions, 620 flow, removed 14 selfloop flow, removed 14 redundant places. [2022-07-19 21:43:22,888 INFO L242 Difference]: Finished difference. Result has 207 places, 202 transitions, 480 flow [2022-07-19 21:43:22,888 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=480, PETRI_PLACES=207, PETRI_TRANSITIONS=202} [2022-07-19 21:43:22,889 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 3 predicate places. [2022-07-19 21:43:22,889 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 202 transitions, 480 flow [2022-07-19 21:43:22,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 164.14285714285714) internal successors, (1149), 7 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states 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 21:43:22,890 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:43:22,890 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, 1, 1, 1, 1, 1] [2022-07-19 21:43:22,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:43:23,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:43:23,113 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 21:43:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:43:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1301123104, now seen corresponding path program 1 times [2022-07-19 21:43:23,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:43:23,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125919309] [2022-07-19 21:43:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:23,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:43:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:43:23,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:43:23,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125919309] [2022-07-19 21:43:23,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125919309] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:43:23,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468015971] [2022-07-19 21:43:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:23,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:43:23,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:43:23,220 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 21:43:23,251 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 21:43:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:23,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:43:23,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:43:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:43:23,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:43:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:43:23,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468015971] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:43:23,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:43:23,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-19 21:43:23,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418812942] [2022-07-19 21:43:23,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:43:23,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:43:23,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:43:23,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:43:23,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:43:23,746 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 228 [2022-07-19 21:43:23,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 202 transitions, 480 flow. Second operand has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states 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 21:43:23,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:43:23,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 228 [2022-07-19 21:43:23,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:43:23,954 INFO L129 PetriNetUnfolder]: 449/1048 cut-off events. [2022-07-19 21:43:23,955 INFO L130 PetriNetUnfolder]: For 356/469 co-relation queries the response was YES. [2022-07-19 21:43:23,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2122 conditions, 1048 events. 449/1048 cut-off events. For 356/469 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5197 event pairs, 121 based on Foata normal form. 113/961 useless extension candidates. Maximal degree in co-relation 2112. Up to 401 conditions per place. [2022-07-19 21:43:23,962 INFO L132 encePairwiseOnDemand]: 220/228 looper letters, 64 selfloop transitions, 7 changer transitions 0/212 dead transitions. [2022-07-19 21:43:23,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 212 transitions, 657 flow [2022-07-19 21:43:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:43:23,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:43:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1178 transitions. [2022-07-19 21:43:23,968 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7380952380952381 [2022-07-19 21:43:23,969 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1178 transitions. [2022-07-19 21:43:23,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1178 transitions. [2022-07-19 21:43:23,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:43:23,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1178 transitions. [2022-07-19 21:43:23,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.28571428571428) internal successors, (1178), 7 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:23,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states 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 21:43:23,975 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states 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 21:43:23,976 INFO L186 Difference]: Start difference. First operand has 207 places, 202 transitions, 480 flow. Second operand 7 states and 1178 transitions. [2022-07-19 21:43:23,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 212 transitions, 657 flow [2022-07-19 21:43:23,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 212 transitions, 648 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:43:23,981 INFO L242 Difference]: Finished difference. Result has 211 places, 203 transitions, 499 flow [2022-07-19 21:43:23,981 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=499, PETRI_PLACES=211, PETRI_TRANSITIONS=203} [2022-07-19 21:43:23,984 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 7 predicate places. [2022-07-19 21:43:23,984 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 203 transitions, 499 flow [2022-07-19 21:43:23,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states 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 21:43:23,984 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:43:23,985 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:43:24,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 21:43:24,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-19 21:43:24,208 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 21:43:24,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:43:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash 672073108, now seen corresponding path program 1 times [2022-07-19 21:43:24,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:43:24,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237201237] [2022-07-19 21:43:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:24,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:43:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:43:24,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:43:24,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237201237] [2022-07-19 21:43:24,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237201237] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:43:24,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822778847] [2022-07-19 21:43:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:24,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:43:24,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:43:24,311 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 21:43:24,312 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 21:43:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:24,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:43:24,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:43:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:43:24,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:43:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:43:24,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822778847] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:43:24,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:43:24,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-19 21:43:24,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210783218] [2022-07-19 21:43:24,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:43:24,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:43:24,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:43:24,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:43:24,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:43:24,768 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 228 [2022-07-19 21:43:24,770 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 203 transitions, 499 flow. Second operand has 7 states, 7 states have (on average 165.28571428571428) internal successors, (1157), 7 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states 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 21:43:24,770 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:43:24,770 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 228 [2022-07-19 21:43:24,770 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:43:24,953 INFO L129 PetriNetUnfolder]: 440/1049 cut-off events. [2022-07-19 21:43:24,953 INFO L130 PetriNetUnfolder]: For 596/849 co-relation queries the response was YES. [2022-07-19 21:43:24,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2232 conditions, 1049 events. 440/1049 cut-off events. For 596/849 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5218 event pairs, 109 based on Foata normal form. 253/1194 useless extension candidates. Maximal degree in co-relation 2220. Up to 415 conditions per place. [2022-07-19 21:43:24,962 INFO L132 encePairwiseOnDemand]: 220/228 looper letters, 66 selfloop transitions, 7 changer transitions 0/213 dead transitions. [2022-07-19 21:43:24,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 213 transitions, 682 flow [2022-07-19 21:43:24,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:43:24,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:43:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1172 transitions. [2022-07-19 21:43:24,965 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7343358395989975 [2022-07-19 21:43:24,965 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1172 transitions. [2022-07-19 21:43:24,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1172 transitions. [2022-07-19 21:43:24,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:43:24,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1172 transitions. [2022-07-19 21:43:24,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.42857142857142) internal successors, (1172), 7 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states 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 21:43:24,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states 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 21:43:24,971 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states 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 21:43:24,971 INFO L186 Difference]: Start difference. First operand has 211 places, 203 transitions, 499 flow. Second operand 7 states and 1172 transitions. [2022-07-19 21:43:24,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 213 transitions, 682 flow [2022-07-19 21:43:24,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 213 transitions, 671 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-19 21:43:24,976 INFO L242 Difference]: Finished difference. Result has 214 places, 204 transitions, 516 flow [2022-07-19 21:43:24,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=516, PETRI_PLACES=214, PETRI_TRANSITIONS=204} [2022-07-19 21:43:24,977 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 10 predicate places. [2022-07-19 21:43:24,977 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 204 transitions, 516 flow [2022-07-19 21:43:24,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.28571428571428) internal successors, (1157), 7 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states 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 21:43:24,978 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:43:24,978 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:43:24,997 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 21:43:25,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:43:25,188 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 21:43:25,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:43:25,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1599084967, now seen corresponding path program 1 times [2022-07-19 21:43:25,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:43:25,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638867315] [2022-07-19 21:43:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:25,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:43:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:43:26,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:43:26,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638867315] [2022-07-19 21:43:26,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638867315] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:43:26,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965293103] [2022-07-19 21:43:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:26,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:43:26,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:43:26,263 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 21:43:26,265 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 21:43:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:26,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-19 21:43:26,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:43:27,254 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 21:43:27,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 21:43:28,067 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:43:28,069 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 21:43:28,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 21:43:28,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:43:28,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:43:28,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:43:28,992 INFO L356 Elim1Store]: treesize reduction 36, result has 54.4 percent of original size [2022-07-19 21:43:28,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 58 [2022-07-19 21:43:38,293 WARN L233 SmtUtils]: Spent 5.97s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:44:18,998 WARN L233 SmtUtils]: Spent 7.36s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:44:19,190 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:44:19,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 114 [2022-07-19 21:44:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:44:19,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:36,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 21:44:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:44:36,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965293103] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:36,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:36,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 16] total 69 [2022-07-19 21:44:36,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371236811] [2022-07-19 21:44:36,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:36,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-19 21:44:36,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:36,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-19 21:44:36,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=4142, Unknown=11, NotChecked=0, Total=4692 [2022-07-19 21:44:36,905 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 228 [2022-07-19 21:44:36,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 204 transitions, 516 flow. Second operand has 69 states, 69 states have (on average 81.02898550724638) internal successors, (5591), 69 states have internal predecessors, (5591), 0 states have call successors, (0), 0 states 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 21:44:36,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:36,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 228 [2022-07-19 21:44:36,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:56,516 WARN L233 SmtUtils]: Spent 16.10s on a formula simplification. DAG size of input: 49 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:45:12,888 WARN L233 SmtUtils]: Spent 16.05s on a formula simplification. DAG size of input: 44 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:45:27,541 WARN L233 SmtUtils]: Spent 14.10s on a formula simplification. DAG size of input: 56 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:45:44,961 WARN L233 SmtUtils]: Spent 17.31s on a formula simplification. DAG size of input: 49 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:45:46,893 INFO L129 PetriNetUnfolder]: 10448/17154 cut-off events. [2022-07-19 21:45:46,893 INFO L130 PetriNetUnfolder]: For 11571/11571 co-relation queries the response was YES. [2022-07-19 21:45:46,941 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41800 conditions, 17154 events. 10448/17154 cut-off events. For 11571/11571 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 122586 event pairs, 488 based on Foata normal form. 1/16578 useless extension candidates. Maximal degree in co-relation 41786. Up to 6286 conditions per place. [2022-07-19 21:45:47,014 INFO L132 encePairwiseOnDemand]: 168/228 looper letters, 344 selfloop transitions, 136 changer transitions 4/553 dead transitions. [2022-07-19 21:45:47,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 553 transitions, 2650 flow [2022-07-19 21:45:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-19 21:45:47,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-19 21:45:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 4650 transitions. [2022-07-19 21:45:47,028 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3708133971291866 [2022-07-19 21:45:47,029 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 4650 transitions. [2022-07-19 21:45:47,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 4650 transitions. [2022-07-19 21:45:47,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:47,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 4650 transitions. [2022-07-19 21:45:47,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 84.54545454545455) internal successors, (4650), 55 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states 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 21:45:47,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 228.0) internal successors, (12768), 56 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states 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 21:45:47,110 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 228.0) internal successors, (12768), 56 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states 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 21:45:47,111 INFO L186 Difference]: Start difference. First operand has 214 places, 204 transitions, 516 flow. Second operand 55 states and 4650 transitions. [2022-07-19 21:45:47,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 553 transitions, 2650 flow [2022-07-19 21:45:47,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 553 transitions, 2623 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-19 21:45:47,174 INFO L242 Difference]: Finished difference. Result has 282 places, 312 transitions, 1348 flow [2022-07-19 21:45:47,175 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1348, PETRI_PLACES=282, PETRI_TRANSITIONS=312} [2022-07-19 21:45:47,177 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 78 predicate places. [2022-07-19 21:45:47,177 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 312 transitions, 1348 flow [2022-07-19 21:45:47,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 81.02898550724638) internal successors, (5591), 69 states have internal predecessors, (5591), 0 states have call successors, (0), 0 states 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 21:45:47,180 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:47,180 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:47,208 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 21:45:47,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:47,400 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 21:45:47,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:47,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1725345177, now seen corresponding path program 2 times [2022-07-19 21:45:47,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:47,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592817126] [2022-07-19 21:45:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:47,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:45:49,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:49,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592817126] [2022-07-19 21:45:49,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592817126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:49,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981408817] [2022-07-19 21:45:49,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:45:49,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:49,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:49,027 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 21:45:49,031 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 21:45:49,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:45:49,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:49,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-19 21:45:49,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:49,356 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 21:45:49,594 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-19 21:45:49,594 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 21:45:49,956 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-19 21:45:49,956 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 21:45:50,435 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 21:45:50,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2022-07-19 21:45:51,271 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:45:51,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 27 [2022-07-19 21:45:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:45:51,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:51,751 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:45:51,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 606 treesize of output 542 [2022-07-19 21:45:51,860 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 354 treesize of output 346 [2022-07-19 21:45:52,324 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:45:52,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 758 treesize of output 550