./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-more-multiply-verify.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 b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:35:43,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:35:43,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:35:43,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:35:43,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:35:43,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:35:43,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:35:43,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:35:43,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:35:43,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:35:43,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:35:43,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:35:43,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:35:43,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:35:43,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:35:43,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:35:43,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:35:43,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:35:43,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:35:43,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:35:43,402 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:35:43,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:35:43,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:35:43,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:35:43,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:35:43,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:35:43,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:35:43,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:35:43,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:35:43,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:35:43,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:35:43,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:35:43,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:35:43,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:35:43,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:35:43,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:35:43,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:35:43,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:35:43,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:35:43,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:35:43,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:35:43,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:35:43,419 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:35:43,441 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:35:43,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:35:43,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:35:43,445 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:35:43,446 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:35:43,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:35:43,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:35:43,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:35:43,447 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:35:43,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:35:43,448 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:35:43,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:35:43,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:35:43,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:35:43,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:35:43,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:35:43,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:35:43,449 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:35:43,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:35:43,450 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:35:43,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:35:43,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:35:43,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:35:43,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:35:43,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:35:43,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:35:43,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:35:43,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:35:43,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:35:43,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:35:43,452 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:35:43,452 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:35:43,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:35:43,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa [2022-07-12 10:35:43,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:35:43,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:35:43,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:35:43,734 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:35:43,735 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:35:43,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-07-12 10:35:43,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e37c2d6/d7e552952b3744499886e737a56fafa5/FLAGf41e91c25 [2022-07-12 10:35:44,191 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:35:44,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-07-12 10:35:44,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e37c2d6/d7e552952b3744499886e737a56fafa5/FLAGf41e91c25 [2022-07-12 10:35:44,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e37c2d6/d7e552952b3744499886e737a56fafa5 [2022-07-12 10:35:44,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:35:44,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:35:44,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:35:44,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:35:44,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:35:44,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:35:44" (1/1) ... [2022-07-12 10:35:44,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea8ba64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:35:44, skipping insertion in model container [2022-07-12 10:35:44,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:35:44" (1/1) ... [2022-07-12 10:35:44,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:35:44,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:35:44,834 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-more-multiply-verify.wvr.c[3042,3055] [2022-07-12 10:35:44,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:35:44,857 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:35:44,881 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-more-multiply-verify.wvr.c[3042,3055] [2022-07-12 10:35:44,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:35:44,897 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:35:44,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:35:44 WrapperNode [2022-07-12 10:35:44,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:35:44,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:35:44,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:35:44,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:35:44,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:35:44" (1/1) ... [2022-07-12 10:35:44,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:35:44" (1/1) ... [2022-07-12 10:35:44,945 INFO L137 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 179 [2022-07-12 10:35:44,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:35:44,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:35:44,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:35:44,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:35:44,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:35:44" (1/1) ... [2022-07-12 10:35:44,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:35:44" (1/1) ... [2022-07-12 10:35:44,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:35:44" (1/1) ... [2022-07-12 10:35:44,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:35:44" (1/1) ... [2022-07-12 10:35:44,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:35:44" (1/1) ... [2022-07-12 10:35:44,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:35:44" (1/1) ... [2022-07-12 10:35:44,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:35:44" (1/1) ... [2022-07-12 10:35:44,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:35:44,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:35:44,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:35:44,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:35:44,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:35:44" (1/1) ... [2022-07-12 10:35:45,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:35:45,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:35:45,037 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) [2022-07-12 10:35:45,061 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 [2022-07-12 10:35:45,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:35:45,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:35:45,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:35:45,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:35:45,086 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:35:45,087 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:35:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:35:45,087 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:35:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:35:45,087 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:35:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:35:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:35:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:35:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:35:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:35:45,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:35:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:35:45,090 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:35:45,161 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:35:45,162 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:35:45,480 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:35:45,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:35:45,567 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 10:35:45,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:35:45 BoogieIcfgContainer [2022-07-12 10:35:45,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:35:45,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:35:45,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:35:45,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:35:45,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:35:44" (1/3) ... [2022-07-12 10:35:45,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e358a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:35:45, skipping insertion in model container [2022-07-12 10:35:45,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:35:44" (2/3) ... [2022-07-12 10:35:45,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e358a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:35:45, skipping insertion in model container [2022-07-12 10:35:45,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:35:45" (3/3) ... [2022-07-12 10:35:45,579 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2022-07-12 10:35:45,584 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:35:45,596 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:35:45,597 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:35:45,597 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:35:45,687 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:35:45,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 154 transitions, 332 flow [2022-07-12 10:35:45,792 INFO L129 PetriNetUnfolder]: 9/151 cut-off events. [2022-07-12 10:35:45,792 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:35:45,797 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 9/151 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2022-07-12 10:35:45,797 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 154 transitions, 332 flow [2022-07-12 10:35:45,812 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 140 transitions, 298 flow [2022-07-12 10:35:45,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:35:45,827 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@45a377de, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4b6b8d3a [2022-07-12 10:35:45,828 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:35:45,854 INFO L129 PetriNetUnfolder]: 9/139 cut-off events. [2022-07-12 10:35:45,855 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:35:45,855 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:35:45,856 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:35:45,856 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)] === [2022-07-12 10:35:45,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:35:45,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1039110471, now seen corresponding path program 1 times [2022-07-12 10:35:45,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:35:45,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131746088] [2022-07-12 10:35:45,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:35:45,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:35:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:35:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:35:46,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:35:46,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131746088] [2022-07-12 10:35:46,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131746088] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:35:46,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:35:46,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:35:46,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188024555] [2022-07-12 10:35:46,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:35:46,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:35:46,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:35:46,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:35:46,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:35:46,180 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 154 [2022-07-12 10:35:46,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 298 flow. Second operand has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:46,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:35:46,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 154 [2022-07-12 10:35:46,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:35:46,288 INFO L129 PetriNetUnfolder]: 18/215 cut-off events. [2022-07-12 10:35:46,288 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-12 10:35:46,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 215 events. 18/215 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 458 event pairs, 15 based on Foata normal form. 19/223 useless extension candidates. Maximal degree in co-relation 150. Up to 37 conditions per place. [2022-07-12 10:35:46,292 INFO L132 encePairwiseOnDemand]: 148/154 looper letters, 9 selfloop transitions, 0 changer transitions 3/134 dead transitions. [2022-07-12 10:35:46,292 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 134 transitions, 304 flow [2022-07-12 10:35:46,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:35:46,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:35:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 291 transitions. [2022-07-12 10:35:46,304 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9448051948051948 [2022-07-12 10:35:46,305 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 291 transitions. [2022-07-12 10:35:46,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 291 transitions. [2022-07-12 10:35:46,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:35:46,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 291 transitions. [2022-07-12 10:35:46,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:46,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:46,320 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:46,321 INFO L186 Difference]: Start difference. First operand has 141 places, 140 transitions, 298 flow. Second operand 2 states and 291 transitions. [2022-07-12 10:35:46,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 134 transitions, 304 flow [2022-07-12 10:35:46,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 134 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-12 10:35:46,331 INFO L242 Difference]: Finished difference. Result has 136 places, 131 transitions, 268 flow [2022-07-12 10:35:46,334 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=268, PETRI_PLACES=136, PETRI_TRANSITIONS=131} [2022-07-12 10:35:46,338 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, -5 predicate places. [2022-07-12 10:35:46,339 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 131 transitions, 268 flow [2022-07-12 10:35:46,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:46,340 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:35:46,340 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:35:46,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:35:46,341 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)] === [2022-07-12 10:35:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:35:46,342 INFO L85 PathProgramCache]: Analyzing trace with hash 401544920, now seen corresponding path program 1 times [2022-07-12 10:35:46,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:35:46,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562029357] [2022-07-12 10:35:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:35:46,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:35:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:35:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:35:46,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:35:46,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562029357] [2022-07-12 10:35:46,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562029357] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:35:46,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:35:46,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:35:46,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115551764] [2022-07-12 10:35:46,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:35:46,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:35:46,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:35:46,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:35:46,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:35:46,556 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 154 [2022-07-12 10:35:46,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 131 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:46,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:35:46,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 154 [2022-07-12 10:35:46,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:35:46,694 INFO L129 PetriNetUnfolder]: 20/259 cut-off events. [2022-07-12 10:35:46,694 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:35:46,697 INFO L84 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 259 events. 20/259 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 616 event pairs, 15 based on Foata normal form. 6/254 useless extension candidates. Maximal degree in co-relation 327. Up to 46 conditions per place. [2022-07-12 10:35:46,699 INFO L132 encePairwiseOnDemand]: 144/154 looper letters, 21 selfloop transitions, 6 changer transitions 4/139 dead transitions. [2022-07-12 10:35:46,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 139 transitions, 349 flow [2022-07-12 10:35:46,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:35:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:35:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 902 transitions. [2022-07-12 10:35:46,706 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8367346938775511 [2022-07-12 10:35:46,706 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 902 transitions. [2022-07-12 10:35:46,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 902 transitions. [2022-07-12 10:35:46,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:35:46,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 902 transitions. [2022-07-12 10:35:46,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.85714285714286) internal successors, (902), 7 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:46,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:46,716 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:46,716 INFO L186 Difference]: Start difference. First operand has 136 places, 131 transitions, 268 flow. Second operand 7 states and 902 transitions. [2022-07-12 10:35:46,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 139 transitions, 349 flow [2022-07-12 10:35:46,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 139 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:35:46,731 INFO L242 Difference]: Finished difference. Result has 141 places, 132 transitions, 294 flow [2022-07-12 10:35:46,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=294, PETRI_PLACES=141, PETRI_TRANSITIONS=132} [2022-07-12 10:35:46,732 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2022-07-12 10:35:46,733 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 132 transitions, 294 flow [2022-07-12 10:35:46,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:46,734 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:35:46,734 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:35:46,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:35:46,735 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)] === [2022-07-12 10:35:46,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:35:46,736 INFO L85 PathProgramCache]: Analyzing trace with hash 370033410, now seen corresponding path program 1 times [2022-07-12 10:35:46,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:35:46,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269221367] [2022-07-12 10:35:46,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:35:46,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:35:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:35:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:35:46,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:35:46,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269221367] [2022-07-12 10:35:46,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269221367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:35:46,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312910585] [2022-07-12 10:35:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:35:46,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:35:46,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:35:46,996 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) [2022-07-12 10:35:47,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:35:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:35:47,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:35:47,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:35:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:35:47,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:35:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:35:47,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312910585] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:35:47,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:35:47,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-07-12 10:35:47,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32814715] [2022-07-12 10:35:47,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:35:47,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:35:47,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:35:47,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:35:47,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:35:47,593 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 154 [2022-07-12 10:35:47,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 132 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:47,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:35:47,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 154 [2022-07-12 10:35:47,596 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:35:47,866 INFO L129 PetriNetUnfolder]: 24/300 cut-off events. [2022-07-12 10:35:47,866 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-07-12 10:35:47,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 300 events. 24/300 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 858 event pairs, 15 based on Foata normal form. 9/299 useless extension candidates. Maximal degree in co-relation 426. Up to 44 conditions per place. [2022-07-12 10:35:47,869 INFO L132 encePairwiseOnDemand]: 140/154 looper letters, 23 selfloop transitions, 12 changer transitions 9/149 dead transitions. [2022-07-12 10:35:47,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 149 transitions, 430 flow [2022-07-12 10:35:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:35:47,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:35:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1621 transitions. [2022-07-12 10:35:47,873 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8096903096903096 [2022-07-12 10:35:47,874 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1621 transitions. [2022-07-12 10:35:47,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1621 transitions. [2022-07-12 10:35:47,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:35:47,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1621 transitions. [2022-07-12 10:35:47,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 124.6923076923077) internal successors, (1621), 13 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:47,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:47,885 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:47,885 INFO L186 Difference]: Start difference. First operand has 141 places, 132 transitions, 294 flow. Second operand 13 states and 1621 transitions. [2022-07-12 10:35:47,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 149 transitions, 430 flow [2022-07-12 10:35:47,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 149 transitions, 420 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:35:47,892 INFO L242 Difference]: Finished difference. Result has 154 places, 136 transitions, 349 flow [2022-07-12 10:35:47,892 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=349, PETRI_PLACES=154, PETRI_TRANSITIONS=136} [2022-07-12 10:35:47,893 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 13 predicate places. [2022-07-12 10:35:47,893 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 136 transitions, 349 flow [2022-07-12 10:35:47,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:47,895 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:35:47,895 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:35:47,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 10:35:48,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:35:48,103 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)] === [2022-07-12 10:35:48,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:35:48,103 INFO L85 PathProgramCache]: Analyzing trace with hash -807681704, now seen corresponding path program 2 times [2022-07-12 10:35:48,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:35:48,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015349650] [2022-07-12 10:35:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:35:48,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:35:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:35:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:35:50,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:35:50,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015349650] [2022-07-12 10:35:50,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015349650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:35:50,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251339995] [2022-07-12 10:35:50,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:35:50,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:35:50,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:35:50,983 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) [2022-07-12 10:35:50,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:35:51,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 10:35:51,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:35:51,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 10:35:51,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:35:51,594 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:35:51,595 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 51 treesize of output 17 [2022-07-12 10:35:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:35:51,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:35:51,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251339995] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:35:51,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:35:51,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [36] total 44 [2022-07-12 10:35:51,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333996267] [2022-07-12 10:35:51,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:35:51,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:35:51,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:35:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:35:51,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 10:35:51,712 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-07-12 10:35:51,713 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 136 transitions, 349 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:51,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:35:51,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-07-12 10:35:51,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:35:52,354 INFO L129 PetriNetUnfolder]: 424/1101 cut-off events. [2022-07-12 10:35:52,355 INFO L130 PetriNetUnfolder]: For 892/892 co-relation queries the response was YES. [2022-07-12 10:35:52,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2344 conditions, 1101 events. 424/1101 cut-off events. For 892/892 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6095 event pairs, 139 based on Foata normal form. 35/1083 useless extension candidates. Maximal degree in co-relation 2332. Up to 500 conditions per place. [2022-07-12 10:35:52,368 INFO L132 encePairwiseOnDemand]: 137/154 looper letters, 70 selfloop transitions, 15 changer transitions 36/211 dead transitions. [2022-07-12 10:35:52,368 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 211 transitions, 804 flow [2022-07-12 10:35:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:35:52,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:35:52,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1400 transitions. [2022-07-12 10:35:52,372 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6993006993006993 [2022-07-12 10:35:52,372 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1400 transitions. [2022-07-12 10:35:52,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1400 transitions. [2022-07-12 10:35:52,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:35:52,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1400 transitions. [2022-07-12 10:35:52,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.6923076923077) internal successors, (1400), 13 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:52,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:52,382 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:52,382 INFO L186 Difference]: Start difference. First operand has 154 places, 136 transitions, 349 flow. Second operand 13 states and 1400 transitions. [2022-07-12 10:35:52,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 211 transitions, 804 flow [2022-07-12 10:35:52,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 211 transitions, 749 flow, removed 22 selfloop flow, removed 7 redundant places. [2022-07-12 10:35:52,392 INFO L242 Difference]: Finished difference. Result has 168 places, 150 transitions, 455 flow [2022-07-12 10:35:52,392 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=455, PETRI_PLACES=168, PETRI_TRANSITIONS=150} [2022-07-12 10:35:52,394 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 27 predicate places. [2022-07-12 10:35:52,394 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 150 transitions, 455 flow [2022-07-12 10:35:52,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:52,395 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:35:52,395 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:35:52,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:35:52,619 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,SelfDestructingSolverStorable3 [2022-07-12 10:35:52,620 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)] === [2022-07-12 10:35:52,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:35:52,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1998262026, now seen corresponding path program 3 times [2022-07-12 10:35:52,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:35:52,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718564737] [2022-07-12 10:35:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:35:52,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:35:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:35:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:35:54,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:35:54,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718564737] [2022-07-12 10:35:54,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718564737] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:35:54,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122866553] [2022-07-12 10:35:54,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:35:54,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:35:54,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:35:54,774 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) [2022-07-12 10:35:54,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:35:54,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-12 10:35:54,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:35:54,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 10:35:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:35:55,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:35:55,547 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 21 treesize of output 23 [2022-07-12 10:35:55,782 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:35:55,783 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 51 treesize of output 17 [2022-07-12 10:35:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:35:55,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:35:55,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122866553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:35:55,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:35:55,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [34] total 49 [2022-07-12 10:35:55,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44658163] [2022-07-12 10:35:55,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:35:55,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:35:55,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:35:55,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:35:55,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2223, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 10:35:55,905 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-12 10:35:55,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 150 transitions, 455 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:55,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:35:55,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-12 10:35:55,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:35:57,236 INFO L129 PetriNetUnfolder]: 570/1363 cut-off events. [2022-07-12 10:35:57,236 INFO L130 PetriNetUnfolder]: For 1556/1654 co-relation queries the response was YES. [2022-07-12 10:35:57,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3548 conditions, 1363 events. 570/1363 cut-off events. For 1556/1654 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7708 event pairs, 149 based on Foata normal form. 30/1328 useless extension candidates. Maximal degree in co-relation 3527. Up to 656 conditions per place. [2022-07-12 10:35:57,250 INFO L132 encePairwiseOnDemand]: 130/154 looper letters, 83 selfloop transitions, 28 changer transitions 37/225 dead transitions. [2022-07-12 10:35:57,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 225 transitions, 1051 flow [2022-07-12 10:35:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:35:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:35:57,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1877 transitions. [2022-07-12 10:35:57,256 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5803957946815089 [2022-07-12 10:35:57,256 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1877 transitions. [2022-07-12 10:35:57,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1877 transitions. [2022-07-12 10:35:57,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:35:57,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1877 transitions. [2022-07-12 10:35:57,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.38095238095238) internal successors, (1877), 21 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:57,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:57,270 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:57,271 INFO L186 Difference]: Start difference. First operand has 168 places, 150 transitions, 455 flow. Second operand 21 states and 1877 transitions. [2022-07-12 10:35:57,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 225 transitions, 1051 flow [2022-07-12 10:35:57,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 225 transitions, 1003 flow, removed 24 selfloop flow, removed 6 redundant places. [2022-07-12 10:35:57,280 INFO L242 Difference]: Finished difference. Result has 187 places, 166 transitions, 634 flow [2022-07-12 10:35:57,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=634, PETRI_PLACES=187, PETRI_TRANSITIONS=166} [2022-07-12 10:35:57,283 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 46 predicate places. [2022-07-12 10:35:57,283 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 166 transitions, 634 flow [2022-07-12 10:35:57,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:35:57,284 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:35:57,285 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:35:57,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:35:57,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:35:57,503 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)] === [2022-07-12 10:35:57,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:35:57,503 INFO L85 PathProgramCache]: Analyzing trace with hash -776477366, now seen corresponding path program 4 times [2022-07-12 10:35:57,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:35:57,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368100060] [2022-07-12 10:35:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:35:57,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:35:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:36:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:36:00,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:36:00,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368100060] [2022-07-12 10:36:00,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368100060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:36:00,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728834928] [2022-07-12 10:36:00,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:36:00,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:36:00,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:36:00,488 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) [2022-07-12 10:36:00,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:36:00,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:36:00,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:36:00,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 10:36:00,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:36:01,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:36:01,746 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 21 treesize of output 23 [2022-07-12 10:36:02,089 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:36:02,090 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 51 treesize of output 17 [2022-07-12 10:36:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:36:02,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:36:03,163 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-12 10:36:03,163 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 108 treesize of output 126 [2022-07-12 10:36:03,217 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-07-12 10:36:03,217 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 54 treesize of output 60 [2022-07-12 10:36:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:36:05,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728834928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:36:05,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:36:05,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 28, 28] total 87 [2022-07-12 10:36:05,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831719928] [2022-07-12 10:36:05,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:36:05,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-12 10:36:05,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:36:05,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-12 10:36:05,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=7120, Unknown=3, NotChecked=0, Total=7482 [2022-07-12 10:36:05,324 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-12 10:36:05,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 166 transitions, 634 flow. Second operand has 87 states, 87 states have (on average 66.35632183908046) internal successors, (5773), 87 states have internal predecessors, (5773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:05,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:36:05,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-12 10:36:05,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:36:27,620 INFO L129 PetriNetUnfolder]: 2127/5197 cut-off events. [2022-07-12 10:36:27,621 INFO L130 PetriNetUnfolder]: For 9739/9893 co-relation queries the response was YES. [2022-07-12 10:36:27,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14737 conditions, 5197 events. 2127/5197 cut-off events. For 9739/9893 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 42931 event pairs, 408 based on Foata normal form. 71/5079 useless extension candidates. Maximal degree in co-relation 14710. Up to 676 conditions per place. [2022-07-12 10:36:27,662 INFO L132 encePairwiseOnDemand]: 108/154 looper letters, 339 selfloop transitions, 123 changer transitions 80/599 dead transitions. [2022-07-12 10:36:27,662 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 599 transitions, 3640 flow [2022-07-12 10:36:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-12 10:36:27,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-12 10:36:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5298 transitions. [2022-07-12 10:36:27,674 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4587012987012987 [2022-07-12 10:36:27,674 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5298 transitions. [2022-07-12 10:36:27,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5298 transitions. [2022-07-12 10:36:27,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:36:27,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5298 transitions. [2022-07-12 10:36:27,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 70.64) internal successors, (5298), 75 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:27,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 154.0) internal successors, (11704), 76 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:27,735 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 154.0) internal successors, (11704), 76 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:27,736 INFO L186 Difference]: Start difference. First operand has 187 places, 166 transitions, 634 flow. Second operand 75 states and 5298 transitions. [2022-07-12 10:36:27,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 599 transitions, 3640 flow [2022-07-12 10:36:27,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 599 transitions, 3372 flow, removed 123 selfloop flow, removed 15 redundant places. [2022-07-12 10:36:27,772 INFO L242 Difference]: Finished difference. Result has 280 places, 254 transitions, 1647 flow [2022-07-12 10:36:27,772 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=1647, PETRI_PLACES=280, PETRI_TRANSITIONS=254} [2022-07-12 10:36:27,773 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 139 predicate places. [2022-07-12 10:36:27,773 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 254 transitions, 1647 flow [2022-07-12 10:36:27,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 66.35632183908046) internal successors, (5773), 87 states have internal predecessors, (5773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:27,776 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:36:27,776 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:36:27,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 10:36:27,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:36:27,991 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)] === [2022-07-12 10:36:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:36:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash -708962460, now seen corresponding path program 5 times [2022-07-12 10:36:27,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:36:27,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695733022] [2022-07-12 10:36:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:36:27,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:36:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:36:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:36:30,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:36:30,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695733022] [2022-07-12 10:36:30,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695733022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:36:30,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143162496] [2022-07-12 10:36:30,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:36:30,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:36:30,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:36:30,128 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) [2022-07-12 10:36:30,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:36:30,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 10:36:30,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:36:30,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 10:36:30,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:36:30,226 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 [2022-07-12 10:36:30,444 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:36:30,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 10:36:31,467 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 33 treesize of output 33 [2022-07-12 10:36:31,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:36:31,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 10:36:31,820 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:36:31,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 20 [2022-07-12 10:36:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:36:31,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:36:32,907 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-12 10:36:32,907 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 234 treesize of output 202 [2022-07-12 10:36:32,920 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:36:32,921 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 42 treesize of output 16 [2022-07-12 10:36:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:36:35,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143162496] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:36:35,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:36:35,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 28, 28] total 85 [2022-07-12 10:36:35,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570752157] [2022-07-12 10:36:35,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:36:35,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-12 10:36:35,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:36:35,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-12 10:36:35,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=6737, Unknown=1, NotChecked=0, Total=7140 [2022-07-12 10:36:35,874 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-12 10:36:35,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 254 transitions, 1647 flow. Second operand has 85 states, 85 states have (on average 66.41176470588235) internal successors, (5645), 85 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:35,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:36:35,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-12 10:36:35,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:36:44,935 INFO L129 PetriNetUnfolder]: 2301/5537 cut-off events. [2022-07-12 10:36:44,935 INFO L130 PetriNetUnfolder]: For 29019/29222 co-relation queries the response was YES. [2022-07-12 10:36:44,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20882 conditions, 5537 events. 2301/5537 cut-off events. For 29019/29222 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 46305 event pairs, 616 based on Foata normal form. 48/5352 useless extension candidates. Maximal degree in co-relation 20822. Up to 1257 conditions per place. [2022-07-12 10:36:44,995 INFO L132 encePairwiseOnDemand]: 110/154 looper letters, 224 selfloop transitions, 129 changer transitions 18/428 dead transitions. [2022-07-12 10:36:44,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 428 transitions, 3597 flow [2022-07-12 10:36:44,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-12 10:36:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-12 10:36:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3595 transitions. [2022-07-12 10:36:45,001 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4489260739260739 [2022-07-12 10:36:45,001 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3595 transitions. [2022-07-12 10:36:45,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3595 transitions. [2022-07-12 10:36:45,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:36:45,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3595 transitions. [2022-07-12 10:36:45,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 69.13461538461539) internal successors, (3595), 52 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:45,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 154.0) internal successors, (8162), 53 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:45,019 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 154.0) internal successors, (8162), 53 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:45,019 INFO L186 Difference]: Start difference. First operand has 280 places, 254 transitions, 1647 flow. Second operand 52 states and 3595 transitions. [2022-07-12 10:36:45,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 428 transitions, 3597 flow [2022-07-12 10:36:45,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 428 transitions, 3142 flow, removed 188 selfloop flow, removed 34 redundant places. [2022-07-12 10:36:45,116 INFO L242 Difference]: Finished difference. Result has 297 places, 289 transitions, 2055 flow [2022-07-12 10:36:45,117 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2055, PETRI_PLACES=297, PETRI_TRANSITIONS=289} [2022-07-12 10:36:45,117 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 156 predicate places. [2022-07-12 10:36:45,117 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 289 transitions, 2055 flow [2022-07-12 10:36:45,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 66.41176470588235) internal successors, (5645), 85 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:45,119 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:36:45,120 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:36:45,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:36:45,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:36:45,335 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)] === [2022-07-12 10:36:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:36:45,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1006525896, now seen corresponding path program 6 times [2022-07-12 10:36:45,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:36:45,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041570972] [2022-07-12 10:36:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:36:45,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:36:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:36:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:36:47,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:36:47,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041570972] [2022-07-12 10:36:47,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041570972] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:36:47,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652127299] [2022-07-12 10:36:47,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:36:47,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:36:47,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:36:47,228 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) [2022-07-12 10:36:47,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:36:47,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-07-12 10:36:47,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:36:47,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 10:36:47,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:36:48,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:36:48,013 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 34 treesize of output 34 [2022-07-12 10:36:48,175 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:36:48,176 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 51 treesize of output 17 [2022-07-12 10:36:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:36:48,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:36:48,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652127299] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:36:48,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:36:48,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [36] total 51 [2022-07-12 10:36:48,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089806113] [2022-07-12 10:36:48,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:36:48,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:36:48,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:36:48,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:36:48,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 10:36:48,285 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-12 10:36:48,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 289 transitions, 2055 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:48,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:36:48,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-12 10:36:48,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:36:50,170 INFO L129 PetriNetUnfolder]: 2206/5417 cut-off events. [2022-07-12 10:36:50,171 INFO L130 PetriNetUnfolder]: For 33097/33297 co-relation queries the response was YES. [2022-07-12 10:36:50,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20472 conditions, 5417 events. 2206/5417 cut-off events. For 33097/33297 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 46047 event pairs, 758 based on Foata normal form. 78/5240 useless extension candidates. Maximal degree in co-relation 20411. Up to 3035 conditions per place. [2022-07-12 10:36:50,223 INFO L132 encePairwiseOnDemand]: 130/154 looper letters, 156 selfloop transitions, 61 changer transitions 49/353 dead transitions. [2022-07-12 10:36:50,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 353 transitions, 2934 flow [2022-07-12 10:36:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:36:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:36:50,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1880 transitions. [2022-07-12 10:36:50,226 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5813234384662956 [2022-07-12 10:36:50,226 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1880 transitions. [2022-07-12 10:36:50,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1880 transitions. [2022-07-12 10:36:50,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:36:50,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1880 transitions. [2022-07-12 10:36:50,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.52380952380952) internal successors, (1880), 21 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:50,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:50,235 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:50,235 INFO L186 Difference]: Start difference. First operand has 297 places, 289 transitions, 2055 flow. Second operand 21 states and 1880 transitions. [2022-07-12 10:36:50,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 353 transitions, 2934 flow [2022-07-12 10:36:50,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 353 transitions, 2758 flow, removed 32 selfloop flow, removed 37 redundant places. [2022-07-12 10:36:50,357 INFO L242 Difference]: Finished difference. Result has 284 places, 280 transitions, 2020 flow [2022-07-12 10:36:50,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1890, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2020, PETRI_PLACES=284, PETRI_TRANSITIONS=280} [2022-07-12 10:36:50,360 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 143 predicate places. [2022-07-12 10:36:50,360 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 280 transitions, 2020 flow [2022-07-12 10:36:50,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:50,360 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:36:50,361 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:36:50,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:36:50,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:36:50,575 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)] === [2022-07-12 10:36:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:36:50,576 INFO L85 PathProgramCache]: Analyzing trace with hash -945882872, now seen corresponding path program 7 times [2022-07-12 10:36:50,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:36:50,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613457703] [2022-07-12 10:36:50,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:36:50,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:36:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:36:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:36:52,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:36:52,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613457703] [2022-07-12 10:36:52,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613457703] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:36:52,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030421474] [2022-07-12 10:36:52,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:36:52,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:36:52,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:36:52,259 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:36:52,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:36:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:36:52,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-12 10:36:52,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:36:53,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:36:53,464 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 21 treesize of output 23 [2022-07-12 10:36:53,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:36:53,597 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 21 treesize of output 23 [2022-07-12 10:36:54,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:36:54,055 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:36:54,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 17 [2022-07-12 10:36:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:36:54,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:36:55,099 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-12 10:36:55,100 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 608 treesize of output 566 [2022-07-12 10:36:55,151 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-07-12 10:36:55,151 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 506 treesize of output 400 [2022-07-12 10:36:55,203 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-07-12 10:36:55,203 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 374 treesize of output 334 [2022-07-12 10:36:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:36:57,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030421474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:36:57,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:36:57,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 30] total 84 [2022-07-12 10:36:57,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542970921] [2022-07-12 10:36:57,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:36:57,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-12 10:36:57,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:36:57,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-12 10:36:57,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=6524, Unknown=4, NotChecked=0, Total=6972 [2022-07-12 10:36:57,680 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-07-12 10:36:57,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 280 transitions, 2020 flow. Second operand has 84 states, 84 states have (on average 69.30952380952381) internal successors, (5822), 84 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:36:57,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:36:57,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-07-12 10:36:57,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:10,933 INFO L129 PetriNetUnfolder]: 2737/6656 cut-off events. [2022-07-12 10:37:10,933 INFO L130 PetriNetUnfolder]: For 52664/53025 co-relation queries the response was YES. [2022-07-12 10:37:10,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27892 conditions, 6656 events. 2737/6656 cut-off events. For 52664/53025 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 58719 event pairs, 408 based on Foata normal form. 132/6518 useless extension candidates. Maximal degree in co-relation 27826. Up to 908 conditions per place. [2022-07-12 10:37:11,030 INFO L132 encePairwiseOnDemand]: 114/154 looper letters, 351 selfloop transitions, 155 changer transitions 81/647 dead transitions. [2022-07-12 10:37:11,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 647 transitions, 5867 flow [2022-07-12 10:37:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-12 10:37:11,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-12 10:37:11,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 5011 transitions. [2022-07-12 10:37:11,048 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4785141329258976 [2022-07-12 10:37:11,049 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 5011 transitions. [2022-07-12 10:37:11,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 5011 transitions. [2022-07-12 10:37:11,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:11,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 5011 transitions. [2022-07-12 10:37:11,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 73.69117647058823) internal successors, (5011), 68 states have internal predecessors, (5011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:11,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:11,087 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:11,087 INFO L186 Difference]: Start difference. First operand has 284 places, 280 transitions, 2020 flow. Second operand 68 states and 5011 transitions. [2022-07-12 10:37:11,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 647 transitions, 5867 flow [2022-07-12 10:37:11,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 647 transitions, 5321 flow, removed 216 selfloop flow, removed 25 redundant places. [2022-07-12 10:37:11,266 INFO L242 Difference]: Finished difference. Result has 340 places, 324 transitions, 2986 flow [2022-07-12 10:37:11,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=2986, PETRI_PLACES=340, PETRI_TRANSITIONS=324} [2022-07-12 10:37:11,267 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 199 predicate places. [2022-07-12 10:37:11,267 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 324 transitions, 2986 flow [2022-07-12 10:37:11,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 69.30952380952381) internal successors, (5822), 84 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:11,269 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:11,269 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:11,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-12 10:37:11,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:11,483 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)] === [2022-07-12 10:37:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:11,484 INFO L85 PathProgramCache]: Analyzing trace with hash -598237080, now seen corresponding path program 8 times [2022-07-12 10:37:11,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:11,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523243630] [2022-07-12 10:37:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:11,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:14,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:14,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523243630] [2022-07-12 10:37:14,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523243630] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:14,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424621899] [2022-07-12 10:37:14,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:37:14,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:14,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:14,086 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:37:14,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:37:14,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 10:37:14,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:37:14,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 10:37:14,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:37:14,591 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:37:14,591 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 51 treesize of output 17 [2022-07-12 10:37:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:37:14,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:37:14,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424621899] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:14,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:37:14,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [39] total 48 [2022-07-12 10:37:14,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759298324] [2022-07-12 10:37:14,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:14,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:37:14,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:14,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:37:14,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2115, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 10:37:14,691 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 154 [2022-07-12 10:37:14,691 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 324 transitions, 2986 flow. Second operand has 13 states, 13 states have (on average 97.6923076923077) internal successors, (1270), 13 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:14,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:14,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 154 [2022-07-12 10:37:14,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:16,359 INFO L129 PetriNetUnfolder]: 2844/6935 cut-off events. [2022-07-12 10:37:16,359 INFO L130 PetriNetUnfolder]: For 60538/61093 co-relation queries the response was YES. [2022-07-12 10:37:16,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31169 conditions, 6935 events. 2844/6935 cut-off events. For 60538/61093 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 61935 event pairs, 793 based on Foata normal form. 169/6733 useless extension candidates. Maximal degree in co-relation 31090. Up to 4074 conditions per place. [2022-07-12 10:37:16,470 INFO L132 encePairwiseOnDemand]: 137/154 looper letters, 204 selfloop transitions, 66 changer transitions 44/413 dead transitions. [2022-07-12 10:37:16,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 413 transitions, 4338 flow [2022-07-12 10:37:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:37:16,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:37:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1441 transitions. [2022-07-12 10:37:16,473 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2022-07-12 10:37:16,473 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1441 transitions. [2022-07-12 10:37:16,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1441 transitions. [2022-07-12 10:37:16,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:16,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1441 transitions. [2022-07-12 10:37:16,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 102.92857142857143) internal successors, (1441), 14 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:16,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 154.0) internal successors, (2310), 15 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:16,478 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 154.0) internal successors, (2310), 15 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:16,478 INFO L186 Difference]: Start difference. First operand has 340 places, 324 transitions, 2986 flow. Second operand 14 states and 1441 transitions. [2022-07-12 10:37:16,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 413 transitions, 4338 flow [2022-07-12 10:37:16,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 413 transitions, 3971 flow, removed 124 selfloop flow, removed 47 redundant places. [2022-07-12 10:37:16,710 INFO L242 Difference]: Finished difference. Result has 301 places, 345 transitions, 3171 flow [2022-07-12 10:37:16,711 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2667, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3171, PETRI_PLACES=301, PETRI_TRANSITIONS=345} [2022-07-12 10:37:16,712 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 160 predicate places. [2022-07-12 10:37:16,712 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 345 transitions, 3171 flow [2022-07-12 10:37:16,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 97.6923076923077) internal successors, (1270), 13 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:16,712 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:16,712 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:16,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 10:37:16,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 10:37:16,914 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)] === [2022-07-12 10:37:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:16,915 INFO L85 PathProgramCache]: Analyzing trace with hash -419105616, now seen corresponding path program 9 times [2022-07-12 10:37:16,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:16,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61012167] [2022-07-12 10:37:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:16,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:18,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:18,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61012167] [2022-07-12 10:37:18,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61012167] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:18,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99100046] [2022-07-12 10:37:18,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:37:18,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:18,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:18,648 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:37:18,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:37:19,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-12 10:37:19,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:37:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-12 10:37:19,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:37:19,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:37:19,568 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 34 treesize of output 34 [2022-07-12 10:37:19,710 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:37:19,711 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 51 treesize of output 17 [2022-07-12 10:37:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:37:19,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:37:19,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99100046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:19,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:37:19,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-07-12 10:37:19,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445121131] [2022-07-12 10:37:19,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:19,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:37:19,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:19,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:37:19,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2313, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 10:37:19,813 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-12 10:37:19,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 345 transitions, 3171 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:19,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:19,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-12 10:37:19,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:21,878 INFO L129 PetriNetUnfolder]: 2853/6944 cut-off events. [2022-07-12 10:37:21,879 INFO L130 PetriNetUnfolder]: For 57746/58258 co-relation queries the response was YES. [2022-07-12 10:37:21,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30435 conditions, 6944 events. 2853/6944 cut-off events. For 57746/58258 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 62040 event pairs, 794 based on Foata normal form. 183/6760 useless extension candidates. Maximal degree in co-relation 30362. Up to 4047 conditions per place. [2022-07-12 10:37:21,997 INFO L132 encePairwiseOnDemand]: 132/154 looper letters, 214 selfloop transitions, 70 changer transitions 49/420 dead transitions. [2022-07-12 10:37:21,997 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 420 transitions, 4368 flow [2022-07-12 10:37:21,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:37:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:37:21,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1877 transitions. [2022-07-12 10:37:22,000 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5803957946815089 [2022-07-12 10:37:22,000 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1877 transitions. [2022-07-12 10:37:22,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1877 transitions. [2022-07-12 10:37:22,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:22,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1877 transitions. [2022-07-12 10:37:22,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.38095238095238) internal successors, (1877), 21 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:22,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:22,007 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:22,007 INFO L186 Difference]: Start difference. First operand has 301 places, 345 transitions, 3171 flow. Second operand 21 states and 1877 transitions. [2022-07-12 10:37:22,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 420 transitions, 4368 flow [2022-07-12 10:37:22,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 420 transitions, 4242 flow, removed 27 selfloop flow, removed 9 redundant places. [2022-07-12 10:37:22,199 INFO L242 Difference]: Finished difference. Result has 314 places, 346 transitions, 3236 flow [2022-07-12 10:37:22,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3236, PETRI_PLACES=314, PETRI_TRANSITIONS=346} [2022-07-12 10:37:22,200 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 173 predicate places. [2022-07-12 10:37:22,200 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 346 transitions, 3236 flow [2022-07-12 10:37:22,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:22,201 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:22,201 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:22,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:37:22,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:22,402 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)] === [2022-07-12 10:37:22,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1795464152, now seen corresponding path program 10 times [2022-07-12 10:37:22,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:22,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322842913] [2022-07-12 10:37:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:22,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:24,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:24,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322842913] [2022-07-12 10:37:24,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322842913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:24,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264273715] [2022-07-12 10:37:24,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:37:24,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:24,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:24,474 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:37:24,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:37:24,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:37:24,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:37:24,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-12 10:37:24,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:37:25,318 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:37:25,318 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 51 treesize of output 17 [2022-07-12 10:37:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:25,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:37:25,803 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-12 10:37:25,804 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 58 treesize of output 76 [2022-07-12 10:37:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:27,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264273715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:37:27,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:37:27,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 21, 21] total 69 [2022-07-12 10:37:27,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578318005] [2022-07-12 10:37:27,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:37:27,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-12 10:37:27,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:27,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-12 10:37:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=4336, Unknown=0, NotChecked=0, Total=4692 [2022-07-12 10:37:27,244 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-07-12 10:37:27,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 346 transitions, 3236 flow. Second operand has 69 states, 69 states have (on average 69.8840579710145) internal successors, (4822), 69 states have internal predecessors, (4822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:27,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:27,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-07-12 10:37:27,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:38,655 INFO L129 PetriNetUnfolder]: 3627/8514 cut-off events. [2022-07-12 10:37:38,655 INFO L130 PetriNetUnfolder]: For 77462/77869 co-relation queries the response was YES. [2022-07-12 10:37:38,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38059 conditions, 8514 events. 3627/8514 cut-off events. For 77462/77869 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 76798 event pairs, 675 based on Foata normal form. 170/8349 useless extension candidates. Maximal degree in co-relation 37984. Up to 2376 conditions per place. [2022-07-12 10:37:38,736 INFO L132 encePairwiseOnDemand]: 112/154 looper letters, 303 selfloop transitions, 196 changer transitions 84/643 dead transitions. [2022-07-12 10:37:38,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 643 transitions, 6559 flow [2022-07-12 10:37:38,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-12 10:37:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-12 10:37:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4625 transitions. [2022-07-12 10:37:38,740 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.476705833848691 [2022-07-12 10:37:38,741 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4625 transitions. [2022-07-12 10:37:38,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4625 transitions. [2022-07-12 10:37:38,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:38,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4625 transitions. [2022-07-12 10:37:38,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 73.41269841269842) internal successors, (4625), 63 states have internal predecessors, (4625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:38,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 154.0) internal successors, (9856), 64 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:38,759 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 154.0) internal successors, (9856), 64 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:38,759 INFO L186 Difference]: Start difference. First operand has 314 places, 346 transitions, 3236 flow. Second operand 63 states and 4625 transitions. [2022-07-12 10:37:38,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 643 transitions, 6559 flow [2022-07-12 10:37:39,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 643 transitions, 6229 flow, removed 98 selfloop flow, removed 20 redundant places. [2022-07-12 10:37:39,060 INFO L242 Difference]: Finished difference. Result has 371 places, 393 transitions, 4369 flow [2022-07-12 10:37:39,061 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3082, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=4369, PETRI_PLACES=371, PETRI_TRANSITIONS=393} [2022-07-12 10:37:39,061 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 230 predicate places. [2022-07-12 10:37:39,061 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 393 transitions, 4369 flow [2022-07-12 10:37:39,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 69.8840579710145) internal successors, (4822), 69 states have internal predecessors, (4822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:39,062 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:39,062 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:39,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:37:39,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-12 10:37:39,263 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)] === [2022-07-12 10:37:39,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:39,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1415463268, now seen corresponding path program 11 times [2022-07-12 10:37:39,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:39,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678359323] [2022-07-12 10:37:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:39,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:40,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:40,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678359323] [2022-07-12 10:37:40,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678359323] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:40,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022495711] [2022-07-12 10:37:40,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:37:40,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:40,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:40,968 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:37:40,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:37:41,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 10:37:41,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:37:41,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-12 10:37:41,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:37:42,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:37:42,265 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 34 treesize of output 34 [2022-07-12 10:37:42,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:37:42,563 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:37:42,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 17 [2022-07-12 10:37:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:42,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:37:43,276 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-12 10:37:43,277 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 87 treesize of output 105 [2022-07-12 10:37:43,287 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:37:43,287 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 24 treesize of output 11 [2022-07-12 10:37:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:45,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022495711] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:37:45,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:37:45,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 28, 28] total 84 [2022-07-12 10:37:45,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122709711] [2022-07-12 10:37:45,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:37:45,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-12 10:37:45,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-12 10:37:45,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=6576, Unknown=1, NotChecked=0, Total=6972 [2022-07-12 10:37:45,228 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-12 10:37:45,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 393 transitions, 4369 flow. Second operand has 84 states, 84 states have (on average 66.44047619047619) internal successors, (5581), 84 states have internal predecessors, (5581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:45,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:45,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-12 10:37:45,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:00,515 INFO L129 PetriNetUnfolder]: 3727/8973 cut-off events. [2022-07-12 10:38:00,515 INFO L130 PetriNetUnfolder]: For 111271/111777 co-relation queries the response was YES. [2022-07-12 10:38:00,602 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44343 conditions, 8973 events. 3727/8973 cut-off events. For 111271/111777 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 82994 event pairs, 855 based on Foata normal form. 189/8800 useless extension candidates. Maximal degree in co-relation 44253. Up to 2998 conditions per place. [2022-07-12 10:38:00,642 INFO L132 encePairwiseOnDemand]: 115/154 looper letters, 324 selfloop transitions, 163 changer transitions 115/659 dead transitions. [2022-07-12 10:38:00,642 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 659 transitions, 7543 flow [2022-07-12 10:38:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-12 10:38:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-12 10:38:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4751 transitions. [2022-07-12 10:38:00,647 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45368601986249046 [2022-07-12 10:38:00,647 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4751 transitions. [2022-07-12 10:38:00,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4751 transitions. [2022-07-12 10:38:00,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:00,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4751 transitions. [2022-07-12 10:38:00,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 69.86764705882354) internal successors, (4751), 68 states have internal predecessors, (4751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:00,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:00,666 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:00,666 INFO L186 Difference]: Start difference. First operand has 371 places, 393 transitions, 4369 flow. Second operand 68 states and 4751 transitions. [2022-07-12 10:38:00,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 659 transitions, 7543 flow [2022-07-12 10:38:01,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 659 transitions, 7002 flow, removed 190 selfloop flow, removed 48 redundant places. [2022-07-12 10:38:01,264 INFO L242 Difference]: Finished difference. Result has 396 places, 396 transitions, 4524 flow [2022-07-12 10:38:01,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4042, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=4524, PETRI_PLACES=396, PETRI_TRANSITIONS=396} [2022-07-12 10:38:01,266 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 255 predicate places. [2022-07-12 10:38:01,266 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 396 transitions, 4524 flow [2022-07-12 10:38:01,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 66.44047619047619) internal successors, (5581), 84 states have internal predecessors, (5581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:01,267 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:01,267 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:01,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:01,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 10:38:01,468 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)] === [2022-07-12 10:38:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2123235670, now seen corresponding path program 12 times [2022-07-12 10:38:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:01,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617607240] [2022-07-12 10:38:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:01,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:03,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:03,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617607240] [2022-07-12 10:38:03,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617607240] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:03,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175758139] [2022-07-12 10:38:03,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:38:03,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:03,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:03,716 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:38:03,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:38:04,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-07-12 10:38:04,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:04,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 10:38:04,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:04,391 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:38:04,391 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 51 treesize of output 17 [2022-07-12 10:38:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:38:04,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:38:04,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175758139] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:04,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:38:04,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [36] total 44 [2022-07-12 10:38:04,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439369965] [2022-07-12 10:38:04,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:04,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:38:04,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:04,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:38:04,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1752, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 10:38:04,484 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-07-12 10:38:04,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 396 transitions, 4524 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:04,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:04,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-07-12 10:38:04,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:06,521 INFO L129 PetriNetUnfolder]: 3693/8865 cut-off events. [2022-07-12 10:38:06,521 INFO L130 PetriNetUnfolder]: For 119178/119755 co-relation queries the response was YES. [2022-07-12 10:38:06,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45741 conditions, 8865 events. 3693/8865 cut-off events. For 119178/119755 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 82338 event pairs, 1126 based on Foata normal form. 154/8544 useless extension candidates. Maximal degree in co-relation 45646. Up to 5540 conditions per place. [2022-07-12 10:38:06,657 INFO L132 encePairwiseOnDemand]: 139/154 looper letters, 268 selfloop transitions, 62 changer transitions 46/479 dead transitions. [2022-07-12 10:38:06,657 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 479 transitions, 6071 flow [2022-07-12 10:38:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:38:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:38:06,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1393 transitions. [2022-07-12 10:38:06,659 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6958041958041958 [2022-07-12 10:38:06,659 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1393 transitions. [2022-07-12 10:38:06,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1393 transitions. [2022-07-12 10:38:06,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:06,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1393 transitions. [2022-07-12 10:38:06,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.15384615384616) internal successors, (1393), 13 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,663 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,663 INFO L186 Difference]: Start difference. First operand has 396 places, 396 transitions, 4524 flow. Second operand 13 states and 1393 transitions. [2022-07-12 10:38:06,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 479 transitions, 6071 flow [2022-07-12 10:38:07,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 479 transitions, 5752 flow, removed 71 selfloop flow, removed 58 redundant places. [2022-07-12 10:38:07,150 INFO L242 Difference]: Finished difference. Result has 337 places, 410 transitions, 4716 flow [2022-07-12 10:38:07,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4264, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4716, PETRI_PLACES=337, PETRI_TRANSITIONS=410} [2022-07-12 10:38:07,151 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 196 predicate places. [2022-07-12 10:38:07,151 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 410 transitions, 4716 flow [2022-07-12 10:38:07,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:07,151 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:07,152 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:07,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:07,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 10:38:07,352 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)] === [2022-07-12 10:38:07,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:07,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1239829432, now seen corresponding path program 13 times [2022-07-12 10:38:07,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:07,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734242586] [2022-07-12 10:38:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:07,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:08,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:08,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734242586] [2022-07-12 10:38:08,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734242586] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:08,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438027902] [2022-07-12 10:38:08,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:38:08,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:08,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:08,723 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:38:08,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 10:38:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:08,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 10:38:08,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:09,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:38:09,829 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 20 treesize of output 22 [2022-07-12 10:38:10,333 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-07-12 10:38:10,333 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 50 treesize of output 23 [2022-07-12 10:38:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:10,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:11,128 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-12 10:38:11,129 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 110 treesize of output 129 [2022-07-12 10:38:11,159 INFO L356 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-07-12 10:38:11,159 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 57 treesize of output 64 [2022-07-12 10:38:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:14,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438027902] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:14,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:14,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28, 28] total 82 [2022-07-12 10:38:14,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852531310] [2022-07-12 10:38:14,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:14,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-12 10:38:14,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:14,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-12 10:38:14,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=6274, Unknown=1, NotChecked=0, Total=6642 [2022-07-12 10:38:14,287 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-12 10:38:14,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 410 transitions, 4716 flow. Second operand has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:14,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:14,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-12 10:38:14,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:24,893 INFO L129 PetriNetUnfolder]: 3834/9424 cut-off events. [2022-07-12 10:38:24,894 INFO L130 PetriNetUnfolder]: For 119423/119978 co-relation queries the response was YES. [2022-07-12 10:38:25,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46116 conditions, 9424 events. 3834/9424 cut-off events. For 119423/119978 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 89004 event pairs, 643 based on Foata normal form. 139/9151 useless extension candidates. Maximal degree in co-relation 46032. Up to 3205 conditions per place. [2022-07-12 10:38:25,048 INFO L132 encePairwiseOnDemand]: 113/154 looper letters, 325 selfloop transitions, 192 changer transitions 44/618 dead transitions. [2022-07-12 10:38:25,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 618 transitions, 8052 flow [2022-07-12 10:38:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-12 10:38:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-12 10:38:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3553 transitions. [2022-07-12 10:38:25,051 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2022-07-12 10:38:25,051 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3553 transitions. [2022-07-12 10:38:25,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3553 transitions. [2022-07-12 10:38:25,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:25,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3553 transitions. [2022-07-12 10:38:25,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 69.66666666666667) internal successors, (3553), 51 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:25,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 154.0) internal successors, (8008), 52 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:25,066 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 154.0) internal successors, (8008), 52 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:25,067 INFO L186 Difference]: Start difference. First operand has 337 places, 410 transitions, 4716 flow. Second operand 51 states and 3553 transitions. [2022-07-12 10:38:25,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 618 transitions, 8052 flow [2022-07-12 10:38:25,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 618 transitions, 7890 flow, removed 28 selfloop flow, removed 10 redundant places. [2022-07-12 10:38:25,550 INFO L242 Difference]: Finished difference. Result has 389 places, 477 transitions, 6349 flow [2022-07-12 10:38:25,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4579, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=6349, PETRI_PLACES=389, PETRI_TRANSITIONS=477} [2022-07-12 10:38:25,551 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 248 predicate places. [2022-07-12 10:38:25,551 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 477 transitions, 6349 flow [2022-07-12 10:38:25,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:25,552 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:25,553 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:25,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:25,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-12 10:38:25,765 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:38:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:25,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1869641422, now seen corresponding path program 14 times [2022-07-12 10:38:25,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:25,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071283218] [2022-07-12 10:38:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:25,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:27,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:27,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071283218] [2022-07-12 10:38:27,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071283218] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:27,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406595266] [2022-07-12 10:38:27,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:38:27,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:27,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:27,644 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:38:27,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 10:38:27,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 10:38:27,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:27,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-12 10:38:27,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:28,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:38:28,364 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 20 treesize of output 22 [2022-07-12 10:38:28,603 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:38:28,603 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 51 treesize of output 17 [2022-07-12 10:38:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:38:28,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:38:28,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406595266] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:28,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:38:28,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-07-12 10:38:28,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195359514] [2022-07-12 10:38:28,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:28,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:38:28,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:28,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:38:28,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2313, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 10:38:28,697 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-12 10:38:28,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 477 transitions, 6349 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:28,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:28,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-12 10:38:28,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:31,276 INFO L129 PetriNetUnfolder]: 3803/9323 cut-off events. [2022-07-12 10:38:31,277 INFO L130 PetriNetUnfolder]: For 139489/140098 co-relation queries the response was YES. [2022-07-12 10:38:31,391 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49146 conditions, 9323 events. 3803/9323 cut-off events. For 139489/140098 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 88704 event pairs, 1227 based on Foata normal form. 145/9012 useless extension candidates. Maximal degree in co-relation 49051. Up to 5800 conditions per place. [2022-07-12 10:38:31,433 INFO L132 encePairwiseOnDemand]: 131/154 looper letters, 336 selfloop transitions, 78 changer transitions 42/543 dead transitions. [2022-07-12 10:38:31,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 543 transitions, 7851 flow [2022-07-12 10:38:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:38:31,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:38:31,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1875 transitions. [2022-07-12 10:38:31,435 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5797773654916512 [2022-07-12 10:38:31,435 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1875 transitions. [2022-07-12 10:38:31,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1875 transitions. [2022-07-12 10:38:31,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:31,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1875 transitions. [2022-07-12 10:38:31,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.28571428571429) internal successors, (1875), 21 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:31,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:31,441 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:31,441 INFO L186 Difference]: Start difference. First operand has 389 places, 477 transitions, 6349 flow. Second operand 21 states and 1875 transitions. [2022-07-12 10:38:31,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 543 transitions, 7851 flow [2022-07-12 10:38:32,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 543 transitions, 7615 flow, removed 79 selfloop flow, removed 33 redundant places. [2022-07-12 10:38:32,108 INFO L242 Difference]: Finished difference. Result has 377 places, 478 transitions, 6364 flow [2022-07-12 10:38:32,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6364, PETRI_PLACES=377, PETRI_TRANSITIONS=478} [2022-07-12 10:38:32,108 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 236 predicate places. [2022-07-12 10:38:32,109 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 478 transitions, 6364 flow [2022-07-12 10:38:32,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:32,109 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:32,109 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:32,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:32,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:32,316 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:38:32,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:32,316 INFO L85 PathProgramCache]: Analyzing trace with hash 543394134, now seen corresponding path program 15 times [2022-07-12 10:38:32,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:32,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742380361] [2022-07-12 10:38:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:32,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:34,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:34,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742380361] [2022-07-12 10:38:34,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742380361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:34,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97360040] [2022-07-12 10:38:34,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:38:34,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:34,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:34,021 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:38:34,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 10:38:34,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-12 10:38:34,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:34,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 10:38:34,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:34,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:38:34,815 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 34 treesize of output 34 [2022-07-12 10:38:34,968 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:38:34,968 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 51 treesize of output 17 [2022-07-12 10:38:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:38:35,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:38:35,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97360040] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:35,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:38:35,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-07-12 10:38:35,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227748977] [2022-07-12 10:38:35,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:35,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:38:35,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:35,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:38:35,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2312, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 10:38:35,080 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-12 10:38:35,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 478 transitions, 6364 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:35,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:35,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-12 10:38:35,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:37,779 INFO L129 PetriNetUnfolder]: 3820/9413 cut-off events. [2022-07-12 10:38:37,779 INFO L130 PetriNetUnfolder]: For 137239/137875 co-relation queries the response was YES. [2022-07-12 10:38:37,890 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49278 conditions, 9413 events. 3820/9413 cut-off events. For 137239/137875 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 90116 event pairs, 1218 based on Foata normal form. 175/9109 useless extension candidates. Maximal degree in co-relation 49181. Up to 5798 conditions per place. [2022-07-12 10:38:37,935 INFO L132 encePairwiseOnDemand]: 132/154 looper letters, 336 selfloop transitions, 74 changer transitions 51/548 dead transitions. [2022-07-12 10:38:37,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 548 transitions, 7869 flow [2022-07-12 10:38:37,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:38:37,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:38:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1875 transitions. [2022-07-12 10:38:37,937 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5797773654916512 [2022-07-12 10:38:37,937 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1875 transitions. [2022-07-12 10:38:37,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1875 transitions. [2022-07-12 10:38:37,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:37,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1875 transitions. [2022-07-12 10:38:37,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.28571428571429) internal successors, (1875), 21 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:37,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:37,943 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:37,943 INFO L186 Difference]: Start difference. First operand has 377 places, 478 transitions, 6364 flow. Second operand 21 states and 1875 transitions. [2022-07-12 10:38:37,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 548 transitions, 7869 flow [2022-07-12 10:38:38,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 548 transitions, 7693 flow, removed 19 selfloop flow, removed 20 redundant places. [2022-07-12 10:38:38,563 INFO L242 Difference]: Finished difference. Result has 378 places, 474 transitions, 6282 flow [2022-07-12 10:38:38,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6282, PETRI_PLACES=378, PETRI_TRANSITIONS=474} [2022-07-12 10:38:38,564 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 237 predicate places. [2022-07-12 10:38:38,564 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 474 transitions, 6282 flow [2022-07-12 10:38:38,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:38,564 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:38,564 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:38,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:38,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 10:38:38,765 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:38:38,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:38,766 INFO L85 PathProgramCache]: Analyzing trace with hash -920380298, now seen corresponding path program 16 times [2022-07-12 10:38:38,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:38,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957709990] [2022-07-12 10:38:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:38,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:40,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:40,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957709990] [2022-07-12 10:38:40,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957709990] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:40,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025415159] [2022-07-12 10:38:40,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:38:40,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:40,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:40,544 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:38:40,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 10:38:40,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:38:40,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:40,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-12 10:38:40,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:41,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:38:41,770 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 34 treesize of output 34 [2022-07-12 10:38:42,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:38:42,035 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:38:42,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 17 [2022-07-12 10:38:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:42,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:42,842 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-12 10:38:42,843 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 237 treesize of output 204 [2022-07-12 10:38:42,853 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:38:42,853 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 41 treesize of output 15 [2022-07-12 10:38:51,792 WARN L233 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 96 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:38:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:53,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025415159] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:53,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:53,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 28] total 82 [2022-07-12 10:38:53,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715028998] [2022-07-12 10:38:53,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:53,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-12 10:38:53,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:53,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-12 10:38:53,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=6299, Unknown=1, NotChecked=0, Total=6642 [2022-07-12 10:38:53,278 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-07-12 10:38:53,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 474 transitions, 6282 flow. Second operand has 82 states, 82 states have (on average 69.46341463414635) internal successors, (5696), 82 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:53,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:53,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-07-12 10:38:53,283 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:11,842 INFO L129 PetriNetUnfolder]: 4080/10051 cut-off events. [2022-07-12 10:39:11,842 INFO L130 PetriNetUnfolder]: For 140761/141233 co-relation queries the response was YES. [2022-07-12 10:39:11,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51591 conditions, 10051 events. 4080/10051 cut-off events. For 140761/141233 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 97122 event pairs, 943 based on Foata normal form. 109/9739 useless extension candidates. Maximal degree in co-relation 51494. Up to 2668 conditions per place. [2022-07-12 10:39:11,952 INFO L132 encePairwiseOnDemand]: 116/154 looper letters, 429 selfloop transitions, 161 changer transitions 141/791 dead transitions. [2022-07-12 10:39:11,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 791 transitions, 10662 flow [2022-07-12 10:39:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-12 10:39:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-12 10:39:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 5078 transitions. [2022-07-12 10:39:11,957 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4710575139146568 [2022-07-12 10:39:11,957 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 5078 transitions. [2022-07-12 10:39:11,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 5078 transitions. [2022-07-12 10:39:11,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:11,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 5078 transitions. [2022-07-12 10:39:11,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 72.54285714285714) internal successors, (5078), 70 states have internal predecessors, (5078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:11,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 154.0) internal successors, (10934), 71 states have internal predecessors, (10934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:11,973 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 154.0) internal successors, (10934), 71 states have internal predecessors, (10934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:11,973 INFO L186 Difference]: Start difference. First operand has 378 places, 474 transitions, 6282 flow. Second operand 70 states and 5078 transitions. [2022-07-12 10:39:11,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 791 transitions, 10662 flow [2022-07-12 10:39:12,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 791 transitions, 10325 flow, removed 79 selfloop flow, removed 20 redundant places. [2022-07-12 10:39:12,469 INFO L242 Difference]: Finished difference. Result has 449 places, 517 transitions, 7410 flow [2022-07-12 10:39:12,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6132, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=7410, PETRI_PLACES=449, PETRI_TRANSITIONS=517} [2022-07-12 10:39:12,470 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 308 predicate places. [2022-07-12 10:39:12,470 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 517 transitions, 7410 flow [2022-07-12 10:39:12,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 69.46341463414635) internal successors, (5696), 82 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:12,471 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:12,471 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:39:12,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-12 10:39:12,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 10:39:12,672 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:39:12,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:12,672 INFO L85 PathProgramCache]: Analyzing trace with hash 684691281, now seen corresponding path program 1 times [2022-07-12 10:39:12,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:12,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115874652] [2022-07-12 10:39:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:12,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:39:12,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:12,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115874652] [2022-07-12 10:39:12,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115874652] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:39:12,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:39:12,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:39:12,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066835501] [2022-07-12 10:39:12,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:39:12,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:39:12,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:12,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:39:12,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:39:12,742 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-12 10:39:12,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 517 transitions, 7410 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:12,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:12,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-12 10:39:12,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:16,054 INFO L129 PetriNetUnfolder]: 4077/13269 cut-off events. [2022-07-12 10:39:16,054 INFO L130 PetriNetUnfolder]: For 131043/132024 co-relation queries the response was YES. [2022-07-12 10:39:16,177 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55309 conditions, 13269 events. 4077/13269 cut-off events. For 131043/132024 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 156798 event pairs, 1317 based on Foata normal form. 114/12065 useless extension candidates. Maximal degree in co-relation 55189. Up to 2965 conditions per place. [2022-07-12 10:39:16,218 INFO L132 encePairwiseOnDemand]: 146/154 looper letters, 389 selfloop transitions, 7 changer transitions 0/681 dead transitions. [2022-07-12 10:39:16,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 681 transitions, 11189 flow [2022-07-12 10:39:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:39:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:39:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 690 transitions. [2022-07-12 10:39:16,219 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8961038961038961 [2022-07-12 10:39:16,219 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 690 transitions. [2022-07-12 10:39:16,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 690 transitions. [2022-07-12 10:39:16,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:16,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 690 transitions. [2022-07-12 10:39:16,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:16,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:16,221 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:16,221 INFO L186 Difference]: Start difference. First operand has 449 places, 517 transitions, 7410 flow. Second operand 5 states and 690 transitions. [2022-07-12 10:39:16,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 681 transitions, 11189 flow [2022-07-12 10:39:17,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 681 transitions, 10869 flow, removed 95 selfloop flow, removed 59 redundant places. [2022-07-12 10:39:17,044 INFO L242 Difference]: Finished difference. Result has 369 places, 523 transitions, 7172 flow [2022-07-12 10:39:17,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=7121, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7172, PETRI_PLACES=369, PETRI_TRANSITIONS=523} [2022-07-12 10:39:17,045 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 228 predicate places. [2022-07-12 10:39:17,045 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 523 transitions, 7172 flow [2022-07-12 10:39:17,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:17,046 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:17,046 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:39:17,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 10:39:17,046 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:39:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1996027203, now seen corresponding path program 1 times [2022-07-12 10:39:17,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:17,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492778169] [2022-07-12 10:39:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:17,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:39:17,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:17,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492778169] [2022-07-12 10:39:17,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492778169] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:39:17,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:39:17,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:39:17,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500882140] [2022-07-12 10:39:17,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:39:17,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:39:17,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:17,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:39:17,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:39:17,108 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-12 10:39:17,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 523 transitions, 7172 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:17,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:17,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-12 10:39:17,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:19,765 INFO L129 PetriNetUnfolder]: 3525/11612 cut-off events. [2022-07-12 10:39:19,765 INFO L130 PetriNetUnfolder]: For 105935/106752 co-relation queries the response was YES. [2022-07-12 10:39:19,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47556 conditions, 11612 events. 3525/11612 cut-off events. For 105935/106752 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 133984 event pairs, 1232 based on Foata normal form. 328/11517 useless extension candidates. Maximal degree in co-relation 47461. Up to 3094 conditions per place. [2022-07-12 10:39:19,895 INFO L132 encePairwiseOnDemand]: 147/154 looper letters, 316 selfloop transitions, 7 changer transitions 41/624 dead transitions. [2022-07-12 10:39:19,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 624 transitions, 9872 flow [2022-07-12 10:39:19,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:39:19,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:39:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 812 transitions. [2022-07-12 10:39:19,896 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8787878787878788 [2022-07-12 10:39:19,896 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 812 transitions. [2022-07-12 10:39:19,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 812 transitions. [2022-07-12 10:39:19,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:19,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 812 transitions. [2022-07-12 10:39:19,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.33333333333334) internal successors, (812), 6 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:19,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:19,898 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:19,898 INFO L186 Difference]: Start difference. First operand has 369 places, 523 transitions, 7172 flow. Second operand 6 states and 812 transitions. [2022-07-12 10:39:19,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 624 transitions, 9872 flow [2022-07-12 10:39:20,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 624 transitions, 9736 flow, removed 30 selfloop flow, removed 4 redundant places. [2022-07-12 10:39:20,514 INFO L242 Difference]: Finished difference. Result has 373 places, 489 transitions, 6480 flow [2022-07-12 10:39:20,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6480, PETRI_PLACES=373, PETRI_TRANSITIONS=489} [2022-07-12 10:39:20,515 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 232 predicate places. [2022-07-12 10:39:20,515 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 489 transitions, 6480 flow [2022-07-12 10:39:20,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:20,516 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:20,516 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:39:20,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 10:39:20,516 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:39:20,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:20,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1793788893, now seen corresponding path program 2 times [2022-07-12 10:39:20,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:20,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60812651] [2022-07-12 10:39:20,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:20,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:39:20,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:20,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60812651] [2022-07-12 10:39:20,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60812651] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:20,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571051703] [2022-07-12 10:39:20,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:39:20,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:20,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:20,584 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:39:20,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 10:39:20,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:39:20,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:39:20,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:39:20,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:39:20,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:39:20,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571051703] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:20,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:39:20,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-07-12 10:39:20,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937484117] [2022-07-12 10:39:20,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:39:20,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:39:20,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:20,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:39:20,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:39:20,797 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 154 [2022-07-12 10:39:20,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 489 transitions, 6480 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:20,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:20,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 154 [2022-07-12 10:39:20,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:22,980 INFO L129 PetriNetUnfolder]: 2748/10331 cut-off events. [2022-07-12 10:39:22,980 INFO L130 PetriNetUnfolder]: For 98011/98999 co-relation queries the response was YES. [2022-07-12 10:39:23,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42466 conditions, 10331 events. 2748/10331 cut-off events. For 98011/98999 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 122476 event pairs, 714 based on Foata normal form. 389/10345 useless extension candidates. Maximal degree in co-relation 42371. Up to 2374 conditions per place. [2022-07-12 10:39:23,092 INFO L132 encePairwiseOnDemand]: 149/154 looper letters, 268 selfloop transitions, 9 changer transitions 11/553 dead transitions. [2022-07-12 10:39:23,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 553 transitions, 8313 flow [2022-07-12 10:39:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:39:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:39:23,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 555 transitions. [2022-07-12 10:39:23,094 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.900974025974026 [2022-07-12 10:39:23,094 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 555 transitions. [2022-07-12 10:39:23,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 555 transitions. [2022-07-12 10:39:23,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:23,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 555 transitions. [2022-07-12 10:39:23,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:23,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:23,095 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:23,095 INFO L186 Difference]: Start difference. First operand has 373 places, 489 transitions, 6480 flow. Second operand 4 states and 555 transitions. [2022-07-12 10:39:23,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 553 transitions, 8313 flow [2022-07-12 10:39:23,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 553 transitions, 8192 flow, removed 17 selfloop flow, removed 9 redundant places. [2022-07-12 10:39:23,583 INFO L242 Difference]: Finished difference. Result has 364 places, 492 transitions, 6429 flow [2022-07-12 10:39:23,583 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6355, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6429, PETRI_PLACES=364, PETRI_TRANSITIONS=492} [2022-07-12 10:39:23,584 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 223 predicate places. [2022-07-12 10:39:23,584 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 492 transitions, 6429 flow [2022-07-12 10:39:23,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:23,584 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:23,584 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:39:23,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 10:39:23,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:23,785 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:39:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:23,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1329611087, now seen corresponding path program 3 times [2022-07-12 10:39:23,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:23,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133622026] [2022-07-12 10:39:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:23,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:39:23,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:23,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133622026] [2022-07-12 10:39:23,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133622026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:39:23,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:39:23,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:39:23,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265510820] [2022-07-12 10:39:23,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:39:23,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:39:23,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:39:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:39:23,839 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-12 10:39:23,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 492 transitions, 6429 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:23,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:23,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-12 10:39:23,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:26,670 INFO L129 PetriNetUnfolder]: 3824/13137 cut-off events. [2022-07-12 10:39:26,670 INFO L130 PetriNetUnfolder]: For 112513/113615 co-relation queries the response was YES. [2022-07-12 10:39:26,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54839 conditions, 13137 events. 3824/13137 cut-off events. For 112513/113615 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 157525 event pairs, 1156 based on Foata normal form. 191/12857 useless extension candidates. Maximal degree in co-relation 54746. Up to 3152 conditions per place. [2022-07-12 10:39:26,821 INFO L132 encePairwiseOnDemand]: 147/154 looper letters, 340 selfloop transitions, 13 changer transitions 16/629 dead transitions. [2022-07-12 10:39:26,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 629 transitions, 9619 flow [2022-07-12 10:39:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:39:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:39:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 823 transitions. [2022-07-12 10:39:26,823 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8906926406926406 [2022-07-12 10:39:26,823 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 823 transitions. [2022-07-12 10:39:26,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 823 transitions. [2022-07-12 10:39:26,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:26,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 823 transitions. [2022-07-12 10:39:26,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 137.16666666666666) internal successors, (823), 6 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:26,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:26,825 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:26,826 INFO L186 Difference]: Start difference. First operand has 364 places, 492 transitions, 6429 flow. Second operand 6 states and 823 transitions. [2022-07-12 10:39:26,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 629 transitions, 9619 flow [2022-07-12 10:39:27,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 629 transitions, 9607 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-12 10:39:27,606 INFO L242 Difference]: Finished difference. Result has 372 places, 499 transitions, 6530 flow [2022-07-12 10:39:27,607 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6425, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6530, PETRI_PLACES=372, PETRI_TRANSITIONS=499} [2022-07-12 10:39:27,607 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 231 predicate places. [2022-07-12 10:39:27,608 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 499 transitions, 6530 flow [2022-07-12 10:39:27,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:27,608 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:27,608 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:39:27,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-12 10:39:27,609 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:39:27,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:27,609 INFO L85 PathProgramCache]: Analyzing trace with hash 585481907, now seen corresponding path program 2 times [2022-07-12 10:39:27,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:27,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284619853] [2022-07-12 10:39:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:27,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:39:27,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:27,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284619853] [2022-07-12 10:39:27,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284619853] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:27,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328261950] [2022-07-12 10:39:27,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:39:27,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:27,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:27,679 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:39:27,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 10:39:27,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:39:27,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:39:27,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:39:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:39:27,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:39:27,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328261950] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:27,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:39:27,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-07-12 10:39:27,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414542482] [2022-07-12 10:39:27,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:39:27,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:39:27,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:27,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:39:27,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:39:27,929 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 154 [2022-07-12 10:39:27,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 499 transitions, 6530 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:27,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:27,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 154 [2022-07-12 10:39:27,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand