./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-send-receive.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 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:55:59,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:55:59,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:55:59,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:55:59,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:55:59,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:55:59,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:55:59,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:55:59,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:55:59,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:55:59,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:55:59,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:55:59,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:55:59,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:55:59,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:55:59,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:55:59,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:55:59,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:55:59,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:55:59,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:55:59,055 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:55:59,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:55:59,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:55:59,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:55:59,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:55:59,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:55:59,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:55:59,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:55:59,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:55:59,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:55:59,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:55:59,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:55:59,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:55:59,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:55:59,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:55:59,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:55:59,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:55:59,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:55:59,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:55:59,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:55:59,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:55:59,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:55:59,078 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:55:59,109 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:55:59,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:55:59,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:55:59,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:55:59,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:55:59,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:55:59,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:55:59,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:55:59,111 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:55:59,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:55:59,112 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:55:59,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:55:59,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:55:59,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:55:59,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:55:59,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:55:59,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:55:59,113 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:55:59,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:55:59,115 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:55:59,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:55:59,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:55:59,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:55:59,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:55:59,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:55:59,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:55:59,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:55:59,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:55:59,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:55:59,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:55:59,119 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:55:59,119 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:55:59,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:55:59,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 [2022-07-22 21:55:59,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:55:59,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:55:59,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:55:59,325 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:55:59,325 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:55:59,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-07-22 21:55:59,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a216b18ea/20ad7dc9803b459d83a8d0bfcd0e4a40/FLAG6fb22d7a3 [2022-07-22 21:55:59,739 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:55:59,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-07-22 21:55:59,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a216b18ea/20ad7dc9803b459d83a8d0bfcd0e4a40/FLAG6fb22d7a3 [2022-07-22 21:56:00,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a216b18ea/20ad7dc9803b459d83a8d0bfcd0e4a40 [2022-07-22 21:56:00,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:56:00,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:56:00,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:56:00,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:56:00,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:56:00,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:56:00" (1/1) ... [2022-07-22 21:56:00,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da2f431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:00, skipping insertion in model container [2022-07-22 21:56:00,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:56:00" (1/1) ... [2022-07-22 21:56:00,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:56:00,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:56:00,390 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-send-receive.wvr.c[3107,3120] [2022-07-22 21:56:00,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:56:00,399 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:56:00,416 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-send-receive.wvr.c[3107,3120] [2022-07-22 21:56:00,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:56:00,433 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:56:00,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:00 WrapperNode [2022-07-22 21:56:00,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:56:00,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:56:00,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:56:00,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:56:00,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:00" (1/1) ... [2022-07-22 21:56:00,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:00" (1/1) ... [2022-07-22 21:56:00,478 INFO L137 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 161 [2022-07-22 21:56:00,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:56:00,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:56:00,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:56:00,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:56:00,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:00" (1/1) ... [2022-07-22 21:56:00,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:00" (1/1) ... [2022-07-22 21:56:00,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:00" (1/1) ... [2022-07-22 21:56:00,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:00" (1/1) ... [2022-07-22 21:56:00,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:00" (1/1) ... [2022-07-22 21:56:00,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:00" (1/1) ... [2022-07-22 21:56:00,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:00" (1/1) ... [2022-07-22 21:56:00,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:56:00,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:56:00,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:56:00,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:56:00,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:00" (1/1) ... [2022-07-22 21:56:00,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:56:00,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:00,563 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) [2022-07-22 21:56:00,568 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 [2022-07-22 21:56:00,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:56:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:56:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:56:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:56:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:56:00,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:56:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:56:00,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:56:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:56:00,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:56:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:56:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:56:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:56:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:56:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:56:00,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:56:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:56:00,592 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:56:00,655 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:56:00,657 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:56:00,924 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:56:00,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:56:00,991 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:56:00,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:56:00 BoogieIcfgContainer [2022-07-22 21:56:00,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:56:00,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:56:00,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:56:00,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:56:00,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:56:00" (1/3) ... [2022-07-22 21:56:00,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6298a592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:56:00, skipping insertion in model container [2022-07-22 21:56:00,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:00" (2/3) ... [2022-07-22 21:56:00,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6298a592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:56:00, skipping insertion in model container [2022-07-22 21:56:00,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:56:00" (3/3) ... [2022-07-22 21:56:00,999 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2022-07-22 21:56:01,003 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:56:01,010 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:56:01,010 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:56:01,010 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:56:01,049 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:56:01,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 142 places, 142 transitions, 308 flow [2022-07-22 21:56:01,122 INFO L129 PetriNetUnfolder]: 10/139 cut-off events. [2022-07-22 21:56:01,122 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:56:01,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 10/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 93 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2022-07-22 21:56:01,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 142 transitions, 308 flow [2022-07-22 21:56:01,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 128 transitions, 274 flow [2022-07-22 21:56:01,136 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:56:01,144 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@7b6629b1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@902a6b0 [2022-07-22 21:56:01,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:56:01,182 INFO L129 PetriNetUnfolder]: 10/127 cut-off events. [2022-07-22 21:56:01,182 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:56:01,182 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:01,183 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:56:01,183 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)] === [2022-07-22 21:56:01,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:01,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1295974227, now seen corresponding path program 1 times [2022-07-22 21:56:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:01,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273131528] [2022-07-22 21:56:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:01,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:01,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:01,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273131528] [2022-07-22 21:56:01,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273131528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:01,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:56:01,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:56:01,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042952018] [2022-07-22 21:56:01,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:01,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:56:01,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:01,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:56:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:56:01,412 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 142 [2022-07-22 21:56:01,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 128 transitions, 274 flow. Second operand has 2 states, 2 states have (on average 130.0) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:01,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:01,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 142 [2022-07-22 21:56:01,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:01,468 INFO L129 PetriNetUnfolder]: 21/174 cut-off events. [2022-07-22 21:56:01,468 INFO L130 PetriNetUnfolder]: For 26/27 co-relation queries the response was YES. [2022-07-22 21:56:01,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 174 events. 21/174 cut-off events. For 26/27 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 302 event pairs, 7 based on Foata normal form. 20/176 useless extension candidates. Maximal degree in co-relation 141. Up to 33 conditions per place. [2022-07-22 21:56:01,470 INFO L132 encePairwiseOnDemand]: 136/142 looper letters, 9 selfloop transitions, 0 changer transitions 2/122 dead transitions. [2022-07-22 21:56:01,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 122 transitions, 280 flow [2022-07-22 21:56:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:56:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:56:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 267 transitions. [2022-07-22 21:56:01,481 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9401408450704225 [2022-07-22 21:56:01,482 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 267 transitions. [2022-07-22 21:56:01,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 267 transitions. [2022-07-22 21:56:01,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:01,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 267 transitions. [2022-07-22 21:56:01,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 133.5) internal successors, (267), 2 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:01,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:01,497 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:01,498 INFO L186 Difference]: Start difference. First operand has 128 places, 128 transitions, 274 flow. Second operand 2 states and 267 transitions. [2022-07-22 21:56:01,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 122 transitions, 280 flow [2022-07-22 21:56:01,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 122 transitions, 268 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:56:01,504 INFO L242 Difference]: Finished difference. Result has 123 places, 120 transitions, 246 flow [2022-07-22 21:56:01,505 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=246, PETRI_PLACES=123, PETRI_TRANSITIONS=120} [2022-07-22 21:56:01,509 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, -5 predicate places. [2022-07-22 21:56:01,509 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 120 transitions, 246 flow [2022-07-22 21:56:01,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 130.0) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:01,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:01,510 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] [2022-07-22 21:56:01,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:56:01,510 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)] === [2022-07-22 21:56:01,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:01,513 INFO L85 PathProgramCache]: Analyzing trace with hash -56616445, now seen corresponding path program 1 times [2022-07-22 21:56:01,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:01,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606039167] [2022-07-22 21:56:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:01,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:01,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:01,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606039167] [2022-07-22 21:56:01,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606039167] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:01,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:56:01,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:56:01,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745101917] [2022-07-22 21:56:01,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:01,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:56:01,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:01,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:56:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:56:01,699 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 142 [2022-07-22 21:56:01,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 120 transitions, 246 flow. Second operand has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:01,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:01,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 142 [2022-07-22 21:56:01,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:01,843 INFO L129 PetriNetUnfolder]: 108/431 cut-off events. [2022-07-22 21:56:01,844 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-22 21:56:01,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 431 events. 108/431 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1903 event pairs, 16 based on Foata normal form. 0/390 useless extension candidates. Maximal degree in co-relation 621. Up to 65 conditions per place. [2022-07-22 21:56:01,849 INFO L132 encePairwiseOnDemand]: 137/142 looper letters, 36 selfloop transitions, 5 changer transitions 0/143 dead transitions. [2022-07-22 21:56:01,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 143 transitions, 378 flow [2022-07-22 21:56:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:56:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:56:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 628 transitions. [2022-07-22 21:56:01,854 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8845070422535212 [2022-07-22 21:56:01,854 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 628 transitions. [2022-07-22 21:56:01,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 628 transitions. [2022-07-22 21:56:01,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:01,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 628 transitions. [2022-07-22 21:56:01,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.6) internal successors, (628), 5 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:01,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:01,859 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:01,859 INFO L186 Difference]: Start difference. First operand has 123 places, 120 transitions, 246 flow. Second operand 5 states and 628 transitions. [2022-07-22 21:56:01,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 143 transitions, 378 flow [2022-07-22 21:56:01,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 143 transitions, 378 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:56:01,864 INFO L242 Difference]: Finished difference. Result has 128 places, 123 transitions, 277 flow [2022-07-22 21:56:01,864 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=128, PETRI_TRANSITIONS=123} [2022-07-22 21:56:01,865 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 0 predicate places. [2022-07-22 21:56:01,865 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 123 transitions, 277 flow [2022-07-22 21:56:01,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:01,865 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:01,866 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] [2022-07-22 21:56:01,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:56:01,866 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)] === [2022-07-22 21:56:01,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:01,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1034643297, now seen corresponding path program 2 times [2022-07-22 21:56:01,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:01,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264073525] [2022-07-22 21:56:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:01,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:01,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:01,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264073525] [2022-07-22 21:56:01,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264073525] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:01,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:56:01,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:56:01,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668953097] [2022-07-22 21:56:01,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:01,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:56:01,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:01,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:56:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:56:01,995 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 142 [2022-07-22 21:56:01,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 123 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:01,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:01,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 142 [2022-07-22 21:56:01,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:02,073 INFO L129 PetriNetUnfolder]: 125/419 cut-off events. [2022-07-22 21:56:02,073 INFO L130 PetriNetUnfolder]: For 92/95 co-relation queries the response was YES. [2022-07-22 21:56:02,074 INFO L84 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 419 events. 125/419 cut-off events. For 92/95 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1763 event pairs, 12 based on Foata normal form. 3/364 useless extension candidates. Maximal degree in co-relation 732. Up to 84 conditions per place. [2022-07-22 21:56:02,076 INFO L132 encePairwiseOnDemand]: 137/142 looper letters, 37 selfloop transitions, 7 changer transitions 0/146 dead transitions. [2022-07-22 21:56:02,076 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 146 transitions, 435 flow [2022-07-22 21:56:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:56:02,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:56:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 627 transitions. [2022-07-22 21:56:02,079 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8830985915492958 [2022-07-22 21:56:02,079 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 627 transitions. [2022-07-22 21:56:02,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 627 transitions. [2022-07-22 21:56:02,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:02,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 627 transitions. [2022-07-22 21:56:02,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,082 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,082 INFO L186 Difference]: Start difference. First operand has 128 places, 123 transitions, 277 flow. Second operand 5 states and 627 transitions. [2022-07-22 21:56:02,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 146 transitions, 435 flow [2022-07-22 21:56:02,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 146 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:56:02,086 INFO L242 Difference]: Finished difference. Result has 134 places, 127 transitions, 320 flow [2022-07-22 21:56:02,086 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=134, PETRI_TRANSITIONS=127} [2022-07-22 21:56:02,086 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 6 predicate places. [2022-07-22 21:56:02,087 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 127 transitions, 320 flow [2022-07-22 21:56:02,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,087 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:02,087 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] [2022-07-22 21:56:02,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:56:02,088 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)] === [2022-07-22 21:56:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash -707530407, now seen corresponding path program 3 times [2022-07-22 21:56:02,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:02,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373307095] [2022-07-22 21:56:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:02,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:02,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:02,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373307095] [2022-07-22 21:56:02,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373307095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:02,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:56:02,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:56:02,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457812308] [2022-07-22 21:56:02,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:02,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:56:02,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:56:02,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:56:02,203 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 142 [2022-07-22 21:56:02,203 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 127 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,203 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:02,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 142 [2022-07-22 21:56:02,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:02,348 INFO L129 PetriNetUnfolder]: 200/770 cut-off events. [2022-07-22 21:56:02,348 INFO L130 PetriNetUnfolder]: For 274/282 co-relation queries the response was YES. [2022-07-22 21:56:02,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 770 events. 200/770 cut-off events. For 274/282 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4673 event pairs, 30 based on Foata normal form. 12/711 useless extension candidates. Maximal degree in co-relation 1367. Up to 116 conditions per place. [2022-07-22 21:56:02,352 INFO L132 encePairwiseOnDemand]: 135/142 looper letters, 41 selfloop transitions, 9 changer transitions 16/167 dead transitions. [2022-07-22 21:56:02,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 167 transitions, 592 flow [2022-07-22 21:56:02,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:56:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:56:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 984 transitions. [2022-07-22 21:56:02,354 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8661971830985915 [2022-07-22 21:56:02,354 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 984 transitions. [2022-07-22 21:56:02,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 984 transitions. [2022-07-22 21:56:02,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:02,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 984 transitions. [2022-07-22 21:56:02,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.0) internal successors, (984), 8 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,359 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,359 INFO L186 Difference]: Start difference. First operand has 134 places, 127 transitions, 320 flow. Second operand 8 states and 984 transitions. [2022-07-22 21:56:02,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 167 transitions, 592 flow [2022-07-22 21:56:02,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 167 transitions, 585 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:56:02,363 INFO L242 Difference]: Finished difference. Result has 144 places, 127 transitions, 349 flow [2022-07-22 21:56:02,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=349, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2022-07-22 21:56:02,364 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 16 predicate places. [2022-07-22 21:56:02,364 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 349 flow [2022-07-22 21:56:02,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,364 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:02,364 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:56:02,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:56:02,365 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)] === [2022-07-22 21:56:02,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:02,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1421287066, now seen corresponding path program 1 times [2022-07-22 21:56:02,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:02,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570807901] [2022-07-22 21:56:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:02,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:02,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:02,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570807901] [2022-07-22 21:56:02,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570807901] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:02,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:56:02,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:56:02,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276211289] [2022-07-22 21:56:02,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:02,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:56:02,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:02,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:56:02,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:56:02,463 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 142 [2022-07-22 21:56:02,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 349 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:02,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 142 [2022-07-22 21:56:02,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:02,515 INFO L129 PetriNetUnfolder]: 51/306 cut-off events. [2022-07-22 21:56:02,515 INFO L130 PetriNetUnfolder]: For 174/175 co-relation queries the response was YES. [2022-07-22 21:56:02,516 INFO L84 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 306 events. 51/306 cut-off events. For 174/175 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 946 event pairs, 10 based on Foata normal form. 8/288 useless extension candidates. Maximal degree in co-relation 526. Up to 72 conditions per place. [2022-07-22 21:56:02,517 INFO L132 encePairwiseOnDemand]: 136/142 looper letters, 17 selfloop transitions, 5 changer transitions 0/127 dead transitions. [2022-07-22 21:56:02,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 127 transitions, 367 flow [2022-07-22 21:56:02,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:56:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:56:02,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2022-07-22 21:56:02,519 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8826291079812206 [2022-07-22 21:56:02,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2022-07-22 21:56:02,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2022-07-22 21:56:02,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:02,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2022-07-22 21:56:02,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,522 INFO L186 Difference]: Start difference. First operand has 144 places, 127 transitions, 349 flow. Second operand 3 states and 376 transitions. [2022-07-22 21:56:02,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 127 transitions, 367 flow [2022-07-22 21:56:02,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 127 transitions, 343 flow, removed 1 selfloop flow, removed 11 redundant places. [2022-07-22 21:56:02,526 INFO L242 Difference]: Finished difference. Result has 135 places, 125 transitions, 315 flow [2022-07-22 21:56:02,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=135, PETRI_TRANSITIONS=125} [2022-07-22 21:56:02,529 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 7 predicate places. [2022-07-22 21:56:02,529 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 125 transitions, 315 flow [2022-07-22 21:56:02,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,530 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:02,530 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] [2022-07-22 21:56:02,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:56:02,530 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)] === [2022-07-22 21:56:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:02,533 INFO L85 PathProgramCache]: Analyzing trace with hash 234318788, now seen corresponding path program 1 times [2022-07-22 21:56:02,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:02,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298220302] [2022-07-22 21:56:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:02,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:56:02,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:02,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298220302] [2022-07-22 21:56:02,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298220302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:02,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:56:02,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:56:02,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042496447] [2022-07-22 21:56:02,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:02,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:56:02,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:02,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:56:02,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:56:02,626 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 142 [2022-07-22 21:56:02,626 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 125 transitions, 315 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:02,627 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 142 [2022-07-22 21:56:02,627 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:02,674 INFO L129 PetriNetUnfolder]: 93/395 cut-off events. [2022-07-22 21:56:02,674 INFO L130 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2022-07-22 21:56:02,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 395 events. 93/395 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1494 event pairs, 23 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 748. Up to 129 conditions per place. [2022-07-22 21:56:02,676 INFO L132 encePairwiseOnDemand]: 139/142 looper letters, 19 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2022-07-22 21:56:02,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 130 transitions, 375 flow [2022-07-22 21:56:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:56:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:56:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2022-07-22 21:56:02,678 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9061032863849765 [2022-07-22 21:56:02,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2022-07-22 21:56:02,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2022-07-22 21:56:02,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:02,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2022-07-22 21:56:02,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,681 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,682 INFO L186 Difference]: Start difference. First operand has 135 places, 125 transitions, 315 flow. Second operand 3 states and 386 transitions. [2022-07-22 21:56:02,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 130 transitions, 375 flow [2022-07-22 21:56:02,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 130 transitions, 371 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:56:02,685 INFO L242 Difference]: Finished difference. Result has 137 places, 125 transitions, 318 flow [2022-07-22 21:56:02,685 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=137, PETRI_TRANSITIONS=125} [2022-07-22 21:56:02,687 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 9 predicate places. [2022-07-22 21:56:02,687 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 125 transitions, 318 flow [2022-07-22 21:56:02,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,687 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:02,687 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] [2022-07-22 21:56:02,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:56:02,688 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)] === [2022-07-22 21:56:02,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:02,688 INFO L85 PathProgramCache]: Analyzing trace with hash 773977342, now seen corresponding path program 1 times [2022-07-22 21:56:02,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:02,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932232236] [2022-07-22 21:56:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:02,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:56:02,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:02,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932232236] [2022-07-22 21:56:02,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932232236] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:02,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:56:02,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:56:02,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688769045] [2022-07-22 21:56:02,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:02,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:56:02,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:02,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:56:02,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:56:02,840 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 142 [2022-07-22 21:56:02,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 125 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 108.0) internal successors, (864), 8 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:02,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:02,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 142 [2022-07-22 21:56:02,842 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:02,995 INFO L129 PetriNetUnfolder]: 118/547 cut-off events. [2022-07-22 21:56:02,995 INFO L130 PetriNetUnfolder]: For 266/268 co-relation queries the response was YES. [2022-07-22 21:56:02,996 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1127 conditions, 547 events. 118/547 cut-off events. For 266/268 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2628 event pairs, 56 based on Foata normal form. 2/530 useless extension candidates. Maximal degree in co-relation 1114. Up to 194 conditions per place. [2022-07-22 21:56:02,998 INFO L132 encePairwiseOnDemand]: 132/142 looper letters, 30 selfloop transitions, 6 changer transitions 10/139 dead transitions. [2022-07-22 21:56:02,998 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 139 transitions, 443 flow [2022-07-22 21:56:02,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:56:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:56:03,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 990 transitions. [2022-07-22 21:56:03,000 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7746478873239436 [2022-07-22 21:56:03,000 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 990 transitions. [2022-07-22 21:56:03,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 990 transitions. [2022-07-22 21:56:03,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:03,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 990 transitions. [2022-07-22 21:56:03,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 110.0) internal successors, (990), 9 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:03,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 142.0) internal successors, (1420), 10 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:03,004 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 142.0) internal successors, (1420), 10 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:03,004 INFO L186 Difference]: Start difference. First operand has 137 places, 125 transitions, 318 flow. Second operand 9 states and 990 transitions. [2022-07-22 21:56:03,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 139 transitions, 443 flow [2022-07-22 21:56:03,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 139 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:56:03,007 INFO L242 Difference]: Finished difference. Result has 148 places, 126 transitions, 342 flow [2022-07-22 21:56:03,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=342, PETRI_PLACES=148, PETRI_TRANSITIONS=126} [2022-07-22 21:56:03,008 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 20 predicate places. [2022-07-22 21:56:03,008 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 126 transitions, 342 flow [2022-07-22 21:56:03,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.0) internal successors, (864), 8 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:03,009 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:03,009 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] [2022-07-22 21:56:03,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:56:03,009 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)] === [2022-07-22 21:56:03,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:03,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1356837807, now seen corresponding path program 1 times [2022-07-22 21:56:03,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:03,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801494934] [2022-07-22 21:56:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:03,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:03,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:03,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801494934] [2022-07-22 21:56:03,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801494934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:03,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603572013] [2022-07-22 21:56:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:03,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:03,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:03,759 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) [2022-07-22 21:56:03,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:56:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:03,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-22 21:56:03,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:03,932 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 [2022-07-22 21:56:03,968 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-22 21:56:03,968 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 18 [2022-07-22 21:56:04,027 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-22 21:56:04,028 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 16 treesize of output 22 [2022-07-22 21:56:04,479 INFO L356 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-07-22 21:56:04,479 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 20 treesize of output 30 [2022-07-22 21:56:04,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 21:56:04,940 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 [2022-07-22 21:56:05,016 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 [2022-07-22 21:56:05,095 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 [2022-07-22 21:56:05,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-22 21:56:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:05,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:56:06,890 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:06,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2022-07-22 21:56:06,903 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:06,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2636 treesize of output 2524 [2022-07-22 21:56:06,953 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:06,954 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 1866 treesize of output 1786 [2022-07-22 21:56:06,987 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:06,988 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 2412 treesize of output 2236 [2022-07-22 21:56:07,023 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:07,023 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 2220 treesize of output 1852 [2022-07-22 21:56:08,183 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:08,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2022-07-22 21:56:08,192 INFO L356 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-07-22 21:56:08,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 644 treesize of output 616 [2022-07-22 21:56:08,203 INFO L356 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-07-22 21:56:08,204 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 612 treesize of output 520 [2022-07-22 21:56:08,213 INFO L356 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-07-22 21:56:08,214 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 516 treesize of output 472 [2022-07-22 21:56:08,223 INFO L356 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-07-22 21:56:08,223 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 468 treesize of output 448 [2022-07-22 21:56:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:11,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603572013] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:56:11,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:56:11,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 25] total 67 [2022-07-22 21:56:11,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474900454] [2022-07-22 21:56:11,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:56:11,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-22 21:56:11,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-22 21:56:11,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=3497, Unknown=183, NotChecked=0, Total=4422 [2022-07-22 21:56:11,231 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2022-07-22 21:56:11,235 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 126 transitions, 342 flow. Second operand has 67 states, 67 states have (on average 58.71641791044776) internal successors, (3934), 67 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:11,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:11,235 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2022-07-22 21:56:11,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:18,665 INFO L129 PetriNetUnfolder]: 7304/13113 cut-off events. [2022-07-22 21:56:18,666 INFO L130 PetriNetUnfolder]: For 8663/8663 co-relation queries the response was YES. [2022-07-22 21:56:18,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34258 conditions, 13113 events. 7304/13113 cut-off events. For 8663/8663 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 104866 event pairs, 550 based on Foata normal form. 408/13464 useless extension candidates. Maximal degree in co-relation 34241. Up to 1611 conditions per place. [2022-07-22 21:56:18,740 INFO L132 encePairwiseOnDemand]: 103/142 looper letters, 505 selfloop transitions, 152 changer transitions 54/758 dead transitions. [2022-07-22 21:56:18,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 758 transitions, 3897 flow [2022-07-22 21:56:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-22 21:56:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-22 21:56:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 5063 transitions. [2022-07-22 21:56:18,755 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4571144817623691 [2022-07-22 21:56:18,755 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 5063 transitions. [2022-07-22 21:56:18,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 5063 transitions. [2022-07-22 21:56:18,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:18,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 5063 transitions. [2022-07-22 21:56:18,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 64.91025641025641) internal successors, (5063), 78 states have internal predecessors, (5063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:18,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 142.0) internal successors, (11218), 79 states have internal predecessors, (11218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:18,784 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 142.0) internal successors, (11218), 79 states have internal predecessors, (11218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:18,785 INFO L186 Difference]: Start difference. First operand has 148 places, 126 transitions, 342 flow. Second operand 78 states and 5063 transitions. [2022-07-22 21:56:18,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 758 transitions, 3897 flow [2022-07-22 21:56:18,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 758 transitions, 3737 flow, removed 75 selfloop flow, removed 7 redundant places. [2022-07-22 21:56:18,802 INFO L242 Difference]: Finished difference. Result has 257 places, 286 transitions, 1671 flow [2022-07-22 21:56:18,802 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=1671, PETRI_PLACES=257, PETRI_TRANSITIONS=286} [2022-07-22 21:56:18,804 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 129 predicate places. [2022-07-22 21:56:18,804 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 286 transitions, 1671 flow [2022-07-22 21:56:18,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 58.71641791044776) internal successors, (3934), 67 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:18,805 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:18,805 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] [2022-07-22 21:56:18,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 21:56:19,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:19,022 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)] === [2022-07-22 21:56:19,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:19,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1818539553, now seen corresponding path program 2 times [2022-07-22 21:56:19,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:19,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99690433] [2022-07-22 21:56:19,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:19,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:56:19,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:19,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99690433] [2022-07-22 21:56:19,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99690433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:19,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742164142] [2022-07-22 21:56:19,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:56:19,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:19,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:19,308 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) [2022-07-22 21:56:19,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:56:19,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:56:19,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:56:19,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-22 21:56:19,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:19,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 21:56:20,144 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 [2022-07-22 21:56:20,205 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 [2022-07-22 21:56:20,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:56:20,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-22 21:56:20,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-22 21:56:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:20,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:56:20,728 WARN L833 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (< c_~front~0 0) (and (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))))) is different from false [2022-07-22 21:56:20,874 WARN L833 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (= (mod |c_thread2Thread1of1ForFork2_~b~0#1| 256) 0) (< c_~front~0 0) (and (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))))) (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1))) is different from false [2022-07-22 21:56:21,129 WARN L833 $PredicateComparison]: unable to prove that (or (and (forall ((v_ArrVal_174 (Array Int Int))) (or (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))))) (forall ((v_ArrVal_174 (Array Int Int))) (or (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 1))))) (<= c_~n~0 c_~front~0) (< c_~front~0 0)) is different from false [2022-07-22 21:56:21,259 WARN L833 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (and (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 1)) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)))) (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))))))) (< c_~front~0 0)) is different from false [2022-07-22 21:56:21,327 WARN L833 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (< c_~front~0 0) (and (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ (* c_~front~0 4) |c_ULTIMATE.start_main_#t~ret9#1.offset|))) 1)) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ (* c_~back~0 4) |c_ULTIMATE.start_main_#t~ret9#1.offset|)) 1)))) (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ (* c_~front~0 4) |c_ULTIMATE.start_main_#t~ret9#1.offset|))))) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ (* c_~back~0 4) |c_ULTIMATE.start_main_#t~ret9#1.offset|)) 1)))))) is different from false [2022-07-22 21:56:21,381 WARN L833 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (and (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|))) 1)) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) 1)))) (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)))))))) (< c_~front~0 0)) is different from false [2022-07-22 21:56:21,411 WARN L833 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (and (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))))) (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) 1)) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 1))))) (< c_~front~0 0)) is different from false [2022-07-22 21:56:21,612 WARN L833 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (<= c_~n~0 c_~front~0) (and (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 1)) (forall ((v_ArrVal_175 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))))) (forall ((v_ArrVal_173 (Array Int Int)) (v_ArrVal_174 (Array Int Int))) (or (forall ((v_ArrVal_175 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_175) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) 1)) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_173) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_174) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 1))))) (< c_~front~0 0)) is different from false [2022-07-22 21:56:21,647 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:21,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2022-07-22 21:56:21,657 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:21,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1504 treesize of output 1440 [2022-07-22 21:56:21,672 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:21,673 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 782 treesize of output 738 [2022-07-22 21:56:21,686 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:21,687 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 1364 treesize of output 1260 [2022-07-22 21:56:21,696 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 1142 treesize of output 950 [2022-07-22 21:56:22,751 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:22,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2022-07-22 21:56:22,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 21:56:22,760 INFO L356 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-07-22 21:56:22,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 136 [2022-07-22 21:56:22,768 INFO L356 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-07-22 21:56:22,768 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 132 treesize of output 112 [2022-07-22 21:56:22,775 INFO L356 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-07-22 21:56:22,775 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 83 treesize of output 75 [2022-07-22 21:56:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-22 21:56:23,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742164142] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:56:23,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:56:23,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26, 25] total 59 [2022-07-22 21:56:23,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992512337] [2022-07-22 21:56:23,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:56:23,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-22 21:56:23,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:23,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-22 21:56:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2261, Unknown=22, NotChecked=840, Total=3422 [2022-07-22 21:56:23,368 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2022-07-22 21:56:23,372 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 286 transitions, 1671 flow. Second operand has 59 states, 59 states have (on average 62.932203389830505) internal successors, (3713), 59 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:23,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:23,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2022-07-22 21:56:23,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:30,277 INFO L129 PetriNetUnfolder]: 6688/12648 cut-off events. [2022-07-22 21:56:30,278 INFO L130 PetriNetUnfolder]: For 77760/77922 co-relation queries the response was YES. [2022-07-22 21:56:30,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46844 conditions, 12648 events. 6688/12648 cut-off events. For 77760/77922 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 104673 event pairs, 409 based on Foata normal form. 323/12876 useless extension candidates. Maximal degree in co-relation 46789. Up to 1425 conditions per place. [2022-07-22 21:56:30,418 INFO L132 encePairwiseOnDemand]: 106/142 looper letters, 481 selfloop transitions, 190 changer transitions 205/930 dead transitions. [2022-07-22 21:56:30,431 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 930 transitions, 7893 flow [2022-07-22 21:56:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-22 21:56:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-07-22 21:56:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4682 transitions. [2022-07-22 21:56:30,452 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4778526229842825 [2022-07-22 21:56:30,453 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4682 transitions. [2022-07-22 21:56:30,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4682 transitions. [2022-07-22 21:56:30,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:30,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4682 transitions. [2022-07-22 21:56:30,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 67.85507246376811) internal successors, (4682), 69 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:30,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 142.0) internal successors, (9940), 70 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:30,486 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 142.0) internal successors, (9940), 70 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:30,486 INFO L186 Difference]: Start difference. First operand has 257 places, 286 transitions, 1671 flow. Second operand 69 states and 4682 transitions. [2022-07-22 21:56:30,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 930 transitions, 7893 flow [2022-07-22 21:56:30,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 930 transitions, 7070 flow, removed 321 selfloop flow, removed 20 redundant places. [2022-07-22 21:56:30,906 INFO L242 Difference]: Finished difference. Result has 326 places, 368 transitions, 2784 flow [2022-07-22 21:56:30,907 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=2784, PETRI_PLACES=326, PETRI_TRANSITIONS=368} [2022-07-22 21:56:30,907 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 198 predicate places. [2022-07-22 21:56:30,907 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 368 transitions, 2784 flow [2022-07-22 21:56:30,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 62.932203389830505) internal successors, (3713), 59 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:30,909 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:30,909 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:56:30,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:56:31,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 21:56:31,127 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:56:31,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:31,127 INFO L85 PathProgramCache]: Analyzing trace with hash -561072212, now seen corresponding path program 3 times [2022-07-22 21:56:31,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:31,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524093668] [2022-07-22 21:56:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:31,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:56:31,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:31,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524093668] [2022-07-22 21:56:31,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524093668] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:31,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:56:31,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:56:31,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708857976] [2022-07-22 21:56:31,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:31,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:56:31,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:56:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:56:31,174 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 142 [2022-07-22 21:56:31,174 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 368 transitions, 2784 flow. Second operand has 4 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:31,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:31,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 142 [2022-07-22 21:56:31,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:31,842 INFO L129 PetriNetUnfolder]: 1000/3561 cut-off events. [2022-07-22 21:56:31,842 INFO L130 PetriNetUnfolder]: For 43945/44459 co-relation queries the response was YES. [2022-07-22 21:56:31,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14624 conditions, 3561 events. 1000/3561 cut-off events. For 43945/44459 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 29922 event pairs, 92 based on Foata normal form. 143/3587 useless extension candidates. Maximal degree in co-relation 14549. Up to 806 conditions per place. [2022-07-22 21:56:31,878 INFO L132 encePairwiseOnDemand]: 138/142 looper letters, 158 selfloop transitions, 102 changer transitions 0/475 dead transitions. [2022-07-22 21:56:31,878 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 475 transitions, 4291 flow [2022-07-22 21:56:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:56:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:56:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 514 transitions. [2022-07-22 21:56:31,879 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9049295774647887 [2022-07-22 21:56:31,879 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 514 transitions. [2022-07-22 21:56:31,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 514 transitions. [2022-07-22 21:56:31,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:31,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 514 transitions. [2022-07-22 21:56:31,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.5) internal successors, (514), 4 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:31,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:31,881 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:31,881 INFO L186 Difference]: Start difference. First operand has 326 places, 368 transitions, 2784 flow. Second operand 4 states and 514 transitions. [2022-07-22 21:56:31,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 475 transitions, 4291 flow [2022-07-22 21:56:31,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 475 transitions, 3874 flow, removed 144 selfloop flow, removed 42 redundant places. [2022-07-22 21:56:31,951 INFO L242 Difference]: Finished difference. Result has 289 places, 465 transitions, 3953 flow [2022-07-22 21:56:31,952 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3953, PETRI_PLACES=289, PETRI_TRANSITIONS=465} [2022-07-22 21:56:31,953 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 161 predicate places. [2022-07-22 21:56:31,953 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 465 transitions, 3953 flow [2022-07-22 21:56:31,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:31,953 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:31,953 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:56:31,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:56:31,954 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:56:31,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:31,954 INFO L85 PathProgramCache]: Analyzing trace with hash -983387456, now seen corresponding path program 4 times [2022-07-22 21:56:31,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:31,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719078456] [2022-07-22 21:56:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:31,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:56:32,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:32,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719078456] [2022-07-22 21:56:32,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719078456] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:32,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:56:32,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:56:32,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222740299] [2022-07-22 21:56:32,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:32,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:56:32,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:32,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:56:32,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:56:32,040 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 142 [2022-07-22 21:56:32,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 465 transitions, 3953 flow. Second operand has 4 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:32,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:32,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 142 [2022-07-22 21:56:32,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:33,015 INFO L129 PetriNetUnfolder]: 1290/5209 cut-off events. [2022-07-22 21:56:33,015 INFO L130 PetriNetUnfolder]: For 45355/46042 co-relation queries the response was YES. [2022-07-22 21:56:33,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20527 conditions, 5209 events. 1290/5209 cut-off events. For 45355/46042 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 48863 event pairs, 123 based on Foata normal form. 265/5338 useless extension candidates. Maximal degree in co-relation 20455. Up to 1084 conditions per place. [2022-07-22 21:56:33,136 INFO L132 encePairwiseOnDemand]: 138/142 looper letters, 301 selfloop transitions, 6 changer transitions 0/502 dead transitions. [2022-07-22 21:56:33,137 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 502 transitions, 4902 flow [2022-07-22 21:56:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:56:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:56:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 510 transitions. [2022-07-22 21:56:33,138 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.897887323943662 [2022-07-22 21:56:33,138 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 510 transitions. [2022-07-22 21:56:33,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 510 transitions. [2022-07-22 21:56:33,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:33,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 510 transitions. [2022-07-22 21:56:33,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:33,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:33,140 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:33,140 INFO L186 Difference]: Start difference. First operand has 289 places, 465 transitions, 3953 flow. Second operand 4 states and 510 transitions. [2022-07-22 21:56:33,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 502 transitions, 4902 flow [2022-07-22 21:56:33,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 502 transitions, 4804 flow, removed 49 selfloop flow, removed 0 redundant places. [2022-07-22 21:56:33,285 INFO L242 Difference]: Finished difference. Result has 294 places, 444 transitions, 3638 flow [2022-07-22 21:56:33,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=3569, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3638, PETRI_PLACES=294, PETRI_TRANSITIONS=444} [2022-07-22 21:56:33,286 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 166 predicate places. [2022-07-22 21:56:33,286 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 444 transitions, 3638 flow [2022-07-22 21:56:33,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:33,286 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:33,286 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:56:33,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:56:33,287 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:56:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:33,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1073736438, now seen corresponding path program 1 times [2022-07-22 21:56:33,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:33,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705523771] [2022-07-22 21:56:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:33,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:56:33,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:33,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705523771] [2022-07-22 21:56:33,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705523771] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:33,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896742804] [2022-07-22 21:56:33,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:33,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:33,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:33,444 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) [2022-07-22 21:56:33,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:56:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:33,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 21:56:33,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:56:33,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:56:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:56:34,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896742804] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:56:34,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:56:34,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 31 [2022-07-22 21:56:34,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362832485] [2022-07-22 21:56:34,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:56:34,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-22 21:56:34,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:34,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-22 21:56:34,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-07-22 21:56:34,299 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 142 [2022-07-22 21:56:34,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 444 transitions, 3638 flow. Second operand has 31 states, 31 states have (on average 105.03225806451613) internal successors, (3256), 31 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:34,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:34,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 142 [2022-07-22 21:56:34,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:35,415 INFO L129 PetriNetUnfolder]: 1005/3492 cut-off events. [2022-07-22 21:56:35,415 INFO L130 PetriNetUnfolder]: For 29204/29827 co-relation queries the response was YES. [2022-07-22 21:56:35,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14261 conditions, 3492 events. 1005/3492 cut-off events. For 29204/29827 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 28104 event pairs, 268 based on Foata normal form. 65/3453 useless extension candidates. Maximal degree in co-relation 14186. Up to 1462 conditions per place. [2022-07-22 21:56:35,463 INFO L132 encePairwiseOnDemand]: 125/142 looper letters, 145 selfloop transitions, 15 changer transitions 53/345 dead transitions. [2022-07-22 21:56:35,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 345 transitions, 2905 flow [2022-07-22 21:56:35,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 21:56:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-22 21:56:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2422 transitions. [2022-07-22 21:56:35,467 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.741579914268218 [2022-07-22 21:56:35,467 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2422 transitions. [2022-07-22 21:56:35,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2422 transitions. [2022-07-22 21:56:35,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:35,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2422 transitions. [2022-07-22 21:56:35,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 105.30434782608695) internal successors, (2422), 23 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:35,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:35,474 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:35,474 INFO L186 Difference]: Start difference. First operand has 294 places, 444 transitions, 3638 flow. Second operand 23 states and 2422 transitions. [2022-07-22 21:56:35,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 345 transitions, 2905 flow [2022-07-22 21:56:35,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 345 transitions, 2791 flow, removed 52 selfloop flow, removed 13 redundant places. [2022-07-22 21:56:35,551 INFO L242 Difference]: Finished difference. Result has 284 places, 283 transitions, 2108 flow [2022-07-22 21:56:35,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2254, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2108, PETRI_PLACES=284, PETRI_TRANSITIONS=283} [2022-07-22 21:56:35,552 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 156 predicate places. [2022-07-22 21:56:35,552 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 283 transitions, 2108 flow [2022-07-22 21:56:35,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 105.03225806451613) internal successors, (3256), 31 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:35,553 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:35,553 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:56:35,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:56:35,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:35,768 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:56:35,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:35,768 INFO L85 PathProgramCache]: Analyzing trace with hash -212419619, now seen corresponding path program 2 times [2022-07-22 21:56:35,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:35,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064897951] [2022-07-22 21:56:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:35,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:56:36,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:36,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064897951] [2022-07-22 21:56:36,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064897951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:36,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362239169] [2022-07-22 21:56:36,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:56:36,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:36,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:36,013 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) [2022-07-22 21:56:36,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:56:36,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:56:36,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:56:36,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 21:56:36,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:36,744 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:56:36,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-07-22 21:56:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:36,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:56:37,109 INFO L356 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2022-07-22 21:56:37,109 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 75 treesize of output 62 [2022-07-22 21:56:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:38,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362239169] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:56:38,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:56:38,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19, 18] total 39 [2022-07-22 21:56:38,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655467560] [2022-07-22 21:56:38,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:56:38,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 21:56:38,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:38,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 21:56:38,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1191, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 21:56:38,143 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 142 [2022-07-22 21:56:38,145 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 283 transitions, 2108 flow. Second operand has 39 states, 39 states have (on average 84.38461538461539) internal successors, (3291), 39 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:38,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:38,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 142 [2022-07-22 21:56:38,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:56,952 INFO L129 PetriNetUnfolder]: 29620/61825 cut-off events. [2022-07-22 21:56:56,953 INFO L130 PetriNetUnfolder]: For 447335/448569 co-relation queries the response was YES. [2022-07-22 21:56:58,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253110 conditions, 61825 events. 29620/61825 cut-off events. For 447335/448569 co-relation queries the response was YES. Maximal size of possible extension queue 1741. Compared 657813 event pairs, 2801 based on Foata normal form. 2182/63388 useless extension candidates. Maximal degree in co-relation 253039. Up to 7257 conditions per place. [2022-07-22 21:56:58,171 INFO L132 encePairwiseOnDemand]: 114/142 looper letters, 1172 selfloop transitions, 750 changer transitions 858/2844 dead transitions. [2022-07-22 21:56:58,171 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 2844 transitions, 29841 flow [2022-07-22 21:56:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-07-22 21:56:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2022-07-22 21:56:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 16701 transitions. [2022-07-22 21:56:58,184 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6255993407252023 [2022-07-22 21:56:58,184 INFO L72 ComplementDD]: Start complementDD. Operand 188 states and 16701 transitions. [2022-07-22 21:56:58,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 188 states and 16701 transitions. [2022-07-22 21:56:58,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:58,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 188 states and 16701 transitions. [2022-07-22 21:56:58,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 189 states, 188 states have (on average 88.83510638297872) internal successors, (16701), 188 states have internal predecessors, (16701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:58,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 189 states, 189 states have (on average 142.0) internal successors, (26838), 189 states have internal predecessors, (26838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:58,227 INFO L81 ComplementDD]: Finished complementDD. Result has 189 states, 189 states have (on average 142.0) internal successors, (26838), 189 states have internal predecessors, (26838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:58,227 INFO L186 Difference]: Start difference. First operand has 284 places, 283 transitions, 2108 flow. Second operand 188 states and 16701 transitions. [2022-07-22 21:56:58,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 2844 transitions, 29841 flow [2022-07-22 21:57:01,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 2844 transitions, 28041 flow, removed 868 selfloop flow, removed 33 redundant places. [2022-07-22 21:57:01,764 INFO L242 Difference]: Finished difference. Result has 459 places, 911 transitions, 10574 flow [2022-07-22 21:57:01,765 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=188, PETRI_FLOW=10574, PETRI_PLACES=459, PETRI_TRANSITIONS=911} [2022-07-22 21:57:01,765 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 331 predicate places. [2022-07-22 21:57:01,765 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 911 transitions, 10574 flow [2022-07-22 21:57:01,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 84.38461538461539) internal successors, (3291), 39 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:01,766 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:01,766 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:57:01,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 21:57:01,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:01,984 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:57:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:01,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1109495771, now seen corresponding path program 3 times [2022-07-22 21:57:01,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:01,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112719498] [2022-07-22 21:57:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:01,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:02,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:02,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112719498] [2022-07-22 21:57:02,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112719498] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:02,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184863586] [2022-07-22 21:57:02,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:57:02,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:02,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:02,853 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) [2022-07-22 21:57:02,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:57:02,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 21:57:02,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:57:02,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-22 21:57:02,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:03,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 21:57:03,666 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 [2022-07-22 21:57:03,735 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 [2022-07-22 21:57:03,852 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 [2022-07-22 21:57:04,393 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-07-22 21:57:04,393 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 49 treesize of output 22 [2022-07-22 21:57:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:04,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:12,450 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:57:12,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 98 [2022-07-22 21:57:12,488 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-22 21:57:12,488 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 1122 treesize of output 1108 [2022-07-22 21:57:12,532 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-22 21:57:12,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1056 treesize of output 1008 [2022-07-22 21:57:12,576 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-22 21:57:12,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 956 treesize of output 808 [2022-07-22 21:57:12,624 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-22 21:57:12,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 633 treesize of output 635 [2022-07-22 21:57:17,262 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:57:17,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 98 [2022-07-22 21:57:17,291 INFO L356 Elim1Store]: treesize reduction 91, result has 9.0 percent of original size [2022-07-22 21:57:17,292 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 1122 treesize of output 1064 [2022-07-22 21:57:17,329 INFO L356 Elim1Store]: treesize reduction 91, result has 9.0 percent of original size [2022-07-22 21:57:17,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1056 treesize of output 964 [2022-07-22 21:57:17,360 INFO L356 Elim1Store]: treesize reduction 91, result has 9.0 percent of original size [2022-07-22 21:57:17,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 956 treesize of output 764 [2022-07-22 21:57:17,390 INFO L356 Elim1Store]: treesize reduction 91, result has 9.0 percent of original size [2022-07-22 21:57:17,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 633 treesize of output 591 [2022-07-22 21:57:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:27,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184863586] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:57:27,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:57:27,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32, 28] total 79 [2022-07-22 21:57:27,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379124870] [2022-07-22 21:57:27,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:57:27,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-07-22 21:57:27,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:27,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-07-22 21:57:27,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=5366, Unknown=84, NotChecked=0, Total=6162 [2022-07-22 21:57:27,401 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 142 [2022-07-22 21:57:27,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 911 transitions, 10574 flow. Second operand has 79 states, 79 states have (on average 63.721518987341774) internal successors, (5034), 79 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:27,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:27,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 142 [2022-07-22 21:57:27,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:50,324 INFO L129 PetriNetUnfolder]: 34445/65175 cut-off events. [2022-07-22 21:57:50,324 INFO L130 PetriNetUnfolder]: For 2059414/2060166 co-relation queries the response was YES. [2022-07-22 21:57:51,888 INFO L84 FinitePrefix]: Finished finitePrefix Result has 343304 conditions, 65175 events. 34445/65175 cut-off events. For 2059414/2060166 co-relation queries the response was YES. Maximal size of possible extension queue 1480. Compared 636547 event pairs, 10061 based on Foata normal form. 336/65207 useless extension candidates. Maximal degree in co-relation 343200. Up to 39494 conditions per place. [2022-07-22 21:57:52,304 INFO L132 encePairwiseOnDemand]: 104/142 looper letters, 1318 selfloop transitions, 845 changer transitions 0/2239 dead transitions. [2022-07-22 21:57:52,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 2239 transitions, 29049 flow [2022-07-22 21:57:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-22 21:57:52,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-07-22 21:57:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 5126 transitions. [2022-07-22 21:57:52,309 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.48781880472021316 [2022-07-22 21:57:52,309 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 5126 transitions. [2022-07-22 21:57:52,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 5126 transitions. [2022-07-22 21:57:52,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:52,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 5126 transitions. [2022-07-22 21:57:52,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 69.27027027027027) internal successors, (5126), 74 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:52,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 142.0) internal successors, (10650), 75 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:52,323 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 142.0) internal successors, (10650), 75 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:52,324 INFO L186 Difference]: Start difference. First operand has 459 places, 911 transitions, 10574 flow. Second operand 74 states and 5126 transitions. [2022-07-22 21:57:52,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 2239 transitions, 29049 flow [2022-07-22 21:58:02,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 2239 transitions, 24827 flow, removed 1066 selfloop flow, removed 51 redundant places. [2022-07-22 21:58:02,786 INFO L242 Difference]: Finished difference. Result has 523 places, 1721 transitions, 20488 flow [2022-07-22 21:58:02,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=8454, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=20488, PETRI_PLACES=523, PETRI_TRANSITIONS=1721} [2022-07-22 21:58:02,788 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 395 predicate places. [2022-07-22 21:58:02,788 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 1721 transitions, 20488 flow [2022-07-22 21:58:02,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 63.721518987341774) internal successors, (5034), 79 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:02,789 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:02,789 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:58:02,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:02,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 21:58:02,997 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:58:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:02,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1404099851, now seen corresponding path program 4 times [2022-07-22 21:58:02,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:02,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221300839] [2022-07-22 21:58:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:02,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:58:03,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:03,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221300839] [2022-07-22 21:58:03,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221300839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:03,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443529032] [2022-07-22 21:58:03,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:58:03,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:03,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:03,142 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:58:03,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:58:03,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:58:03,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-22 21:58:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:04,032 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-07-22 21:58:04,032 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 49 treesize of output 22 [2022-07-22 21:58:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:04,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:04,469 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-22 21:58:04,469 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 74 treesize of output 76 [2022-07-22 21:58:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:06,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443529032] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:06,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:06,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 21, 21] total 45 [2022-07-22 21:58:06,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822438857] [2022-07-22 21:58:06,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:06,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 21:58:06,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:06,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 21:58:06,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1687, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 21:58:06,041 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 142 [2022-07-22 21:58:06,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 1721 transitions, 20488 flow. Second operand has 45 states, 45 states have (on average 80.26666666666667) internal successors, (3612), 45 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:06,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:06,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 142 [2022-07-22 21:58:06,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand