/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 22:19:33,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 22:19:33,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 22:19:33,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 22:19:33,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 22:19:33,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 22:19:33,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 22:19:33,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 22:19:33,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 22:19:33,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 22:19:33,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 22:19:33,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 22:19:33,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 22:19:33,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 22:19:33,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 22:19:33,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 22:19:33,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 22:19:33,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 22:19:33,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 22:19:33,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 22:19:33,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 22:19:33,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 22:19:33,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 22:19:33,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 22:19:33,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 22:19:33,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 22:19:33,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 22:19:33,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 22:19:33,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 22:19:33,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 22:19:33,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 22:19:33,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 22:19:33,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 22:19:33,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 22:19:33,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 22:19:33,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 22:19:33,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 22:19:33,442 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 22:19:33,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 22:19:33,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 22:19:33,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 22:19:33,443 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 22:19:33,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 22:19:33,443 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 22:19:33,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 22:19:33,444 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 22:19:33,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 22:19:33,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 22:19:33,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 22:19:33,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 22:19:33,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 22:19:33,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 22:19:33,445 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 22:19:33,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 22:19:33,445 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 22:19:33,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 22:19:33,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 22:19:33,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 22:19:33,445 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 22:19:33,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 22:19:33,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 22:19:33,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 22:19:33,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 22:19:33,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 22:19:33,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 22:19:33,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 22:19:33,446 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 22:19:33,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 22:19:33,446 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 22:19:33,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 22:19:33,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 22:19:33,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 22:19:33,619 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 22:19:33,620 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 22:19:33,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-01-27 22:19:34,626 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 22:19:34,774 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 22:19:34,774 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-01-27 22:19:34,779 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e7fbf416/156f3c8c078a41c6895e81af53d79267/FLAGd0f2a25ac [2023-01-27 22:19:34,788 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e7fbf416/156f3c8c078a41c6895e81af53d79267 [2023-01-27 22:19:34,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 22:19:34,790 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 22:19:34,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 22:19:34,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 22:19:34,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 22:19:34,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:19:34" (1/1) ... [2023-01-27 22:19:34,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57a71e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:19:34, skipping insertion in model container [2023-01-27 22:19:34,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:19:34" (1/1) ... [2023-01-27 22:19:34,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 22:19:34,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 22:19:34,934 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-01-27 22:19:34,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 22:19:34,946 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 22:19:34,965 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-01-27 22:19:34,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 22:19:34,973 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 22:19:34,973 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 22:19:34,977 INFO L208 MainTranslator]: Completed translation [2023-01-27 22:19:34,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:19:34 WrapperNode [2023-01-27 22:19:34,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 22:19:34,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 22:19:34,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 22:19:34,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 22:19:34,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:19:34" (1/1) ... [2023-01-27 22:19:34,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:19:34" (1/1) ... [2023-01-27 22:19:35,010 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 168 [2023-01-27 22:19:35,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 22:19:35,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 22:19:35,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 22:19:35,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 22:19:35,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:19:34" (1/1) ... [2023-01-27 22:19:35,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:19:34" (1/1) ... [2023-01-27 22:19:35,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:19:34" (1/1) ... [2023-01-27 22:19:35,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:19:34" (1/1) ... [2023-01-27 22:19:35,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:19:34" (1/1) ... [2023-01-27 22:19:35,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:19:34" (1/1) ... [2023-01-27 22:19:35,036 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:19:34" (1/1) ... [2023-01-27 22:19:35,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:19:34" (1/1) ... [2023-01-27 22:19:35,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 22:19:35,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 22:19:35,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 22:19:35,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 22:19:35,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:19:34" (1/1) ... [2023-01-27 22:19:35,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 22:19:35,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:19:35,065 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) [2023-01-27 22:19:35,070 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 [2023-01-27 22:19:35,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 22:19:35,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 22:19:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 22:19:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 22:19:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 22:19:35,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 22:19:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 22:19:35,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 22:19:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 22:19:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 22:19:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 22:19:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 22:19:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 22:19:35,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 22:19:35,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 22:19:35,098 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 22:19:35,174 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 22:19:35,175 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 22:19:35,468 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 22:19:35,536 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 22:19:35,537 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 22:19:35,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:19:35 BoogieIcfgContainer [2023-01-27 22:19:35,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 22:19:35,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 22:19:35,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 22:19:35,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 22:19:35,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 10:19:34" (1/3) ... [2023-01-27 22:19:35,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fdbf7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:19:35, skipping insertion in model container [2023-01-27 22:19:35,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:19:34" (2/3) ... [2023-01-27 22:19:35,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fdbf7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:19:35, skipping insertion in model container [2023-01-27 22:19:35,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:19:35" (3/3) ... [2023-01-27 22:19:35,544 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-01-27 22:19:35,555 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 22:19:35,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 22:19:35,555 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 22:19:35,595 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 22:19:35,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 292 flow [2023-01-27 22:19:35,678 INFO L130 PetriNetUnfolder]: 11/136 cut-off events. [2023-01-27 22:19:35,679 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:19:35,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 136 events. 11/136 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2023-01-27 22:19:35,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 138 transitions, 292 flow [2023-01-27 22:19:35,685 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 128 transitions, 268 flow [2023-01-27 22:19:35,687 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 22:19:35,692 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 128 transitions, 268 flow [2023-01-27 22:19:35,694 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 128 transitions, 268 flow [2023-01-27 22:19:35,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 128 transitions, 268 flow [2023-01-27 22:19:35,726 INFO L130 PetriNetUnfolder]: 11/128 cut-off events. [2023-01-27 22:19:35,726 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:19:35,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 128 events. 11/128 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 77 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2023-01-27 22:19:35,727 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2023-01-27 22:19:39,348 INFO L134 LiptonReduction]: Checked pairs total: 839 [2023-01-27 22:19:39,348 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-01-27 22:19:39,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 22:19:39,369 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=false, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@55b09d00, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 22:19:39,369 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 22:19:39,379 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-27 22:19:39,379 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:19:39,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:39,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:39,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:39,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:39,383 INFO L85 PathProgramCache]: Analyzing trace with hash -272600085, now seen corresponding path program 1 times [2023-01-27 22:19:39,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:39,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665331301] [2023-01-27 22:19:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:39,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:39,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:39,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665331301] [2023-01-27 22:19:39,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665331301] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:19:39,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:19:39,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 22:19:39,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600571581] [2023-01-27 22:19:39,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:19:39,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 22:19:39,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:39,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 22:19:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 22:19:39,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 271 [2023-01-27 22:19:39,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:39,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:39,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 271 [2023-01-27 22:19:39,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:39,746 INFO L130 PetriNetUnfolder]: 48/91 cut-off events. [2023-01-27 22:19:39,746 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-01-27 22:19:39,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 91 events. 48/91 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 205 event pairs, 24 based on Foata normal form. 8/74 useless extension candidates. Maximal degree in co-relation 131. Up to 81 conditions per place. [2023-01-27 22:19:39,748 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 15 selfloop transitions, 2 changer transitions 6/24 dead transitions. [2023-01-27 22:19:39,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 112 flow [2023-01-27 22:19:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:19:39,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:19:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 459 transitions. [2023-01-27 22:19:39,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42343173431734316 [2023-01-27 22:19:39,761 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 459 transitions. [2023-01-27 22:19:39,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 459 transitions. [2023-01-27 22:19:39,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:39,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 459 transitions. [2023-01-27 22:19:39,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:39,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:39,772 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:39,774 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 459 transitions. [2023-01-27 22:19:39,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 112 flow [2023-01-27 22:19:39,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 22:19:39,778 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2023-01-27 22:19:39,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2023-01-27 22:19:39,783 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-01-27 22:19:39,783 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2023-01-27 22:19:39,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:39,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:39,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:39,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 22:19:39,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:39,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:39,785 INFO L85 PathProgramCache]: Analyzing trace with hash -799736851, now seen corresponding path program 1 times [2023-01-27 22:19:39,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:39,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942201326] [2023-01-27 22:19:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:39,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:19:40,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:40,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942201326] [2023-01-27 22:19:40,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942201326] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:19:40,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:19:40,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-27 22:19:40,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399310511] [2023-01-27 22:19:40,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:19:40,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 22:19:40,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:40,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 22:19:40,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-01-27 22:19:40,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 271 [2023-01-27 22:19:40,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:40,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 271 [2023-01-27 22:19:40,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:40,386 INFO L130 PetriNetUnfolder]: 78/140 cut-off events. [2023-01-27 22:19:40,386 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-01-27 22:19:40,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 140 events. 78/140 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 378 event pairs, 1 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 352. Up to 89 conditions per place. [2023-01-27 22:19:40,387 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 32 selfloop transitions, 13 changer transitions 5/50 dead transitions. [2023-01-27 22:19:40,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 50 transitions, 249 flow [2023-01-27 22:19:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 22:19:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 22:19:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 874 transitions. [2023-01-27 22:19:40,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40313653136531363 [2023-01-27 22:19:40,390 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 874 transitions. [2023-01-27 22:19:40,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 874 transitions. [2023-01-27 22:19:40,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:40,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 874 transitions. [2023-01-27 22:19:40,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 109.25) internal successors, (874), 8 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,395 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,395 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 8 states and 874 transitions. [2023-01-27 22:19:40,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 50 transitions, 249 flow [2023-01-27 22:19:40,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 50 transitions, 245 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 22:19:40,405 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 147 flow [2023-01-27 22:19:40,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=147, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-01-27 22:19:40,405 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-01-27 22:19:40,405 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 147 flow [2023-01-27 22:19:40,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:40,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:40,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 22:19:40,406 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:40,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:40,407 INFO L85 PathProgramCache]: Analyzing trace with hash 143763307, now seen corresponding path program 2 times [2023-01-27 22:19:40,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:40,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295512349] [2023-01-27 22:19:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:40,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:19:40,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:40,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295512349] [2023-01-27 22:19:40,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295512349] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:19:40,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:19:40,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-27 22:19:40,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899139002] [2023-01-27 22:19:40,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:19:40,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 22:19:40,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:40,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 22:19:40,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-27 22:19:40,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 271 [2023-01-27 22:19:40,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 147 flow. Second operand has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:40,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 271 [2023-01-27 22:19:40,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:40,836 INFO L130 PetriNetUnfolder]: 88/156 cut-off events. [2023-01-27 22:19:40,836 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2023-01-27 22:19:40,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 156 events. 88/156 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 408 event pairs, 9 based on Foata normal form. 1/127 useless extension candidates. Maximal degree in co-relation 559. Up to 120 conditions per place. [2023-01-27 22:19:40,837 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 29 selfloop transitions, 17 changer transitions 5/51 dead transitions. [2023-01-27 22:19:40,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 345 flow [2023-01-27 22:19:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 22:19:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 22:19:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 869 transitions. [2023-01-27 22:19:40,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.400830258302583 [2023-01-27 22:19:40,839 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 869 transitions. [2023-01-27 22:19:40,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 869 transitions. [2023-01-27 22:19:40,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:40,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 869 transitions. [2023-01-27 22:19:40,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 108.625) internal successors, (869), 8 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,844 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,844 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 147 flow. Second operand 8 states and 869 transitions. [2023-01-27 22:19:40,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 345 flow [2023-01-27 22:19:40,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 299 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-01-27 22:19:40,846 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 222 flow [2023-01-27 22:19:40,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=222, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-01-27 22:19:40,847 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2023-01-27 22:19:40,847 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 222 flow [2023-01-27 22:19:40,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:40,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:40,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 22:19:40,848 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:40,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:40,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1615625679, now seen corresponding path program 3 times [2023-01-27 22:19:40,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:40,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751930327] [2023-01-27 22:19:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:40,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:19:40,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:40,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751930327] [2023-01-27 22:19:40,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751930327] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:19:40,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:19:40,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 22:19:40,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037085280] [2023-01-27 22:19:40,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:19:40,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 22:19:40,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:40,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 22:19:40,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 22:19:40,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-01-27 22:19:40,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:40,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-01-27 22:19:40,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:40,943 INFO L130 PetriNetUnfolder]: 63/119 cut-off events. [2023-01-27 22:19:40,943 INFO L131 PetriNetUnfolder]: For 122/125 co-relation queries the response was YES. [2023-01-27 22:19:40,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 119 events. 63/119 cut-off events. For 122/125 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 297 event pairs, 10 based on Foata normal form. 9/108 useless extension candidates. Maximal degree in co-relation 435. Up to 103 conditions per place. [2023-01-27 22:19:40,944 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 25 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2023-01-27 22:19:40,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 243 flow [2023-01-27 22:19:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 22:19:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 22:19:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-01-27 22:19:40,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46494464944649444 [2023-01-27 22:19:40,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-01-27 22:19:40,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-01-27 22:19:40,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:40,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-01-27 22:19:40,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,948 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 222 flow. Second operand 3 states and 378 transitions. [2023-01-27 22:19:40,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 243 flow [2023-01-27 22:19:40,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 222 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-01-27 22:19:40,949 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 165 flow [2023-01-27 22:19:40,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-01-27 22:19:40,950 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-01-27 22:19:40,950 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 165 flow [2023-01-27 22:19:40,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:40,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:40,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:40,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 22:19:40,951 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:40,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:40,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2042112127, now seen corresponding path program 4 times [2023-01-27 22:19:40,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:40,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005177213] [2023-01-27 22:19:40,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:40,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:19:41,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:41,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005177213] [2023-01-27 22:19:41,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005177213] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:19:41,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:19:41,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-27 22:19:41,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892586325] [2023-01-27 22:19:41,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:19:41,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 22:19:41,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:41,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 22:19:41,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-27 22:19:41,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 271 [2023-01-27 22:19:41,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:41,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:41,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 271 [2023-01-27 22:19:41,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:41,299 INFO L130 PetriNetUnfolder]: 66/130 cut-off events. [2023-01-27 22:19:41,299 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2023-01-27 22:19:41,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 130 events. 66/130 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 11 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 442. Up to 94 conditions per place. [2023-01-27 22:19:41,301 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 29 selfloop transitions, 12 changer transitions 5/46 dead transitions. [2023-01-27 22:19:41,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 296 flow [2023-01-27 22:19:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 22:19:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 22:19:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 864 transitions. [2023-01-27 22:19:41,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3985239852398524 [2023-01-27 22:19:41,303 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 864 transitions. [2023-01-27 22:19:41,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 864 transitions. [2023-01-27 22:19:41,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:41,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 864 transitions. [2023-01-27 22:19:41,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 108.0) internal successors, (864), 8 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:41,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:41,307 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:41,307 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 165 flow. Second operand 8 states and 864 transitions. [2023-01-27 22:19:41,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 296 flow [2023-01-27 22:19:41,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 22:19:41,309 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 185 flow [2023-01-27 22:19:41,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-01-27 22:19:41,309 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-01-27 22:19:41,309 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 185 flow [2023-01-27 22:19:41,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:41,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:41,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:41,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 22:19:41,310 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:41,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:41,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1023024236, now seen corresponding path program 1 times [2023-01-27 22:19:41,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:41,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892730716] [2023-01-27 22:19:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:41,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:41,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:41,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892730716] [2023-01-27 22:19:41,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892730716] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:19:41,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361330141] [2023-01-27 22:19:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:41,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:41,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:19:41,398 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) [2023-01-27 22:19:41,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 22:19:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:41,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:19:41,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:19:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:41,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:19:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:41,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361330141] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:19:41,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:19:41,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-27 22:19:41,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805255112] [2023-01-27 22:19:41,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:19:41,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 22:19:41,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 22:19:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-27 22:19:41,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 271 [2023-01-27 22:19:41,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 185 flow. Second operand has 12 states, 12 states have (on average 108.08333333333333) internal successors, (1297), 12 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:41,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:41,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 271 [2023-01-27 22:19:41,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:41,683 INFO L130 PetriNetUnfolder]: 98/203 cut-off events. [2023-01-27 22:19:41,683 INFO L131 PetriNetUnfolder]: For 311/325 co-relation queries the response was YES. [2023-01-27 22:19:41,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 203 events. 98/203 cut-off events. For 311/325 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 697 event pairs, 36 based on Foata normal form. 14/197 useless extension candidates. Maximal degree in co-relation 757. Up to 112 conditions per place. [2023-01-27 22:19:41,684 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 46 selfloop transitions, 7 changer transitions 4/59 dead transitions. [2023-01-27 22:19:41,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 451 flow [2023-01-27 22:19:41,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 22:19:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 22:19:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 674 transitions. [2023-01-27 22:19:41,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4145141451414514 [2023-01-27 22:19:41,686 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 674 transitions. [2023-01-27 22:19:41,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 674 transitions. [2023-01-27 22:19:41,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:41,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 674 transitions. [2023-01-27 22:19:41,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.33333333333333) internal successors, (674), 6 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:41,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:41,689 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:41,689 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 185 flow. Second operand 6 states and 674 transitions. [2023-01-27 22:19:41,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 451 flow [2023-01-27 22:19:41,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 401 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-01-27 22:19:41,691 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 238 flow [2023-01-27 22:19:41,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-01-27 22:19:41,691 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-01-27 22:19:41,691 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 238 flow [2023-01-27 22:19:41,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 108.08333333333333) internal successors, (1297), 12 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:41,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:41,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:41,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 22:19:41,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-27 22:19:41,898 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:41,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:41,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1249123538, now seen corresponding path program 1 times [2023-01-27 22:19:41,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:41,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622931787] [2023-01-27 22:19:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:41,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:19:41,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:41,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622931787] [2023-01-27 22:19:41,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622931787] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:19:41,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:19:41,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 22:19:41,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609411616] [2023-01-27 22:19:41,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:19:41,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 22:19:41,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:41,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 22:19:41,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-01-27 22:19:41,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-01-27 22:19:41,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:41,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:41,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-01-27 22:19:41,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:42,019 INFO L130 PetriNetUnfolder]: 109/232 cut-off events. [2023-01-27 22:19:42,019 INFO L131 PetriNetUnfolder]: For 320/334 co-relation queries the response was YES. [2023-01-27 22:19:42,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 232 events. 109/232 cut-off events. For 320/334 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 828 event pairs, 15 based on Foata normal form. 16/216 useless extension candidates. Maximal degree in co-relation 646. Up to 83 conditions per place. [2023-01-27 22:19:42,021 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 34 selfloop transitions, 10 changer transitions 11/57 dead transitions. [2023-01-27 22:19:42,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 432 flow [2023-01-27 22:19:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:19:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:19:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 512 transitions. [2023-01-27 22:19:42,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47232472324723246 [2023-01-27 22:19:42,022 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 512 transitions. [2023-01-27 22:19:42,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 512 transitions. [2023-01-27 22:19:42,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:42,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 512 transitions. [2023-01-27 22:19:42,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:42,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:42,024 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:42,025 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 238 flow. Second operand 4 states and 512 transitions. [2023-01-27 22:19:42,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 432 flow [2023-01-27 22:19:42,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 407 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-01-27 22:19:42,026 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 214 flow [2023-01-27 22:19:42,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-01-27 22:19:42,027 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-01-27 22:19:42,027 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 214 flow [2023-01-27 22:19:42,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:42,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:42,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:42,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 22:19:42,028 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:42,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:42,028 INFO L85 PathProgramCache]: Analyzing trace with hash 935567924, now seen corresponding path program 2 times [2023-01-27 22:19:42,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:42,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377407698] [2023-01-27 22:19:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:42,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:42,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:42,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377407698] [2023-01-27 22:19:42,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377407698] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:19:42,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106991284] [2023-01-27 22:19:42,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:19:42,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:42,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:19:42,386 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) [2023-01-27 22:19:42,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 22:19:42,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:19:42,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:19:42,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 22:19:42,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:19:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:42,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:19:42,693 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 22:19:42,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-01-27 22:19:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:42,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106991284] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:19:42,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:19:42,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2023-01-27 22:19:42,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40879146] [2023-01-27 22:19:42,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:19:42,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 22:19:42,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:42,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 22:19:42,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-01-27 22:19:42,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 271 [2023-01-27 22:19:42,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 214 flow. Second operand has 20 states, 20 states have (on average 95.95) internal successors, (1919), 20 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:42,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:42,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 271 [2023-01-27 22:19:42,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:43,224 INFO L130 PetriNetUnfolder]: 261/504 cut-off events. [2023-01-27 22:19:43,224 INFO L131 PetriNetUnfolder]: For 771/785 co-relation queries the response was YES. [2023-01-27 22:19:43,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 504 events. 261/504 cut-off events. For 771/785 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2184 event pairs, 30 based on Foata normal form. 6/389 useless extension candidates. Maximal degree in co-relation 1540. Up to 263 conditions per place. [2023-01-27 22:19:43,228 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 92 selfloop transitions, 49 changer transitions 0/143 dead transitions. [2023-01-27 22:19:43,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 143 transitions, 1152 flow [2023-01-27 22:19:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 22:19:43,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 22:19:43,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1903 transitions. [2023-01-27 22:19:43,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695863274422218 [2023-01-27 22:19:43,232 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1903 transitions. [2023-01-27 22:19:43,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1903 transitions. [2023-01-27 22:19:43,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:43,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1903 transitions. [2023-01-27 22:19:43,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 100.15789473684211) internal successors, (1903), 19 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:43,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:43,241 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:43,241 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 214 flow. Second operand 19 states and 1903 transitions. [2023-01-27 22:19:43,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 143 transitions, 1152 flow [2023-01-27 22:19:43,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 143 transitions, 959 flow, removed 93 selfloop flow, removed 3 redundant places. [2023-01-27 22:19:43,245 INFO L231 Difference]: Finished difference. Result has 63 places, 83 transitions, 708 flow [2023-01-27 22:19:43,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=708, PETRI_PLACES=63, PETRI_TRANSITIONS=83} [2023-01-27 22:19:43,245 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 42 predicate places. [2023-01-27 22:19:43,246 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 83 transitions, 708 flow [2023-01-27 22:19:43,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.95) internal successors, (1919), 20 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:43,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:43,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:43,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 22:19:43,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-01-27 22:19:43,452 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:43,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:43,452 INFO L85 PathProgramCache]: Analyzing trace with hash -912937574, now seen corresponding path program 3 times [2023-01-27 22:19:43,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:43,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789895430] [2023-01-27 22:19:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:43,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:43,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:43,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789895430] [2023-01-27 22:19:43,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789895430] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:19:43,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372370258] [2023-01-27 22:19:43,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:19:43,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:43,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:19:43,834 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) [2023-01-27 22:19:43,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 22:19:43,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 22:19:43,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:19:43,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-27 22:19:43,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:19:44,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:19:44,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-27 22:19:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:44,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:19:44,137 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_187 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_187) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2023-01-27 22:19:44,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:19:44,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-01-27 22:19:44,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-27 22:19:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:44,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372370258] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:19:44,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:19:44,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-01-27 22:19:44,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15954971] [2023-01-27 22:19:44,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:19:44,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 22:19:44,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:44,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 22:19:44,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=464, Unknown=1, NotChecked=44, Total=600 [2023-01-27 22:19:44,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-01-27 22:19:44,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 83 transitions, 708 flow. Second operand has 25 states, 25 states have (on average 82.72) internal successors, (2068), 25 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:44,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:44,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-01-27 22:19:44,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:46,113 INFO L130 PetriNetUnfolder]: 498/965 cut-off events. [2023-01-27 22:19:46,113 INFO L131 PetriNetUnfolder]: For 2937/2937 co-relation queries the response was YES. [2023-01-27 22:19:46,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4460 conditions, 965 events. 498/965 cut-off events. For 2937/2937 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4896 event pairs, 45 based on Foata normal form. 32/934 useless extension candidates. Maximal degree in co-relation 3642. Up to 347 conditions per place. [2023-01-27 22:19:46,119 INFO L137 encePairwiseOnDemand]: 257/271 looper letters, 146 selfloop transitions, 112 changer transitions 2/260 dead transitions. [2023-01-27 22:19:46,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 260 transitions, 2437 flow [2023-01-27 22:19:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 22:19:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 22:19:46,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2592 transitions. [2023-01-27 22:19:46,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31881918819188193 [2023-01-27 22:19:46,126 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2592 transitions. [2023-01-27 22:19:46,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2592 transitions. [2023-01-27 22:19:46,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:46,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2592 transitions. [2023-01-27 22:19:46,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 86.4) internal successors, (2592), 30 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:46,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:46,140 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:46,140 INFO L175 Difference]: Start difference. First operand has 63 places, 83 transitions, 708 flow. Second operand 30 states and 2592 transitions. [2023-01-27 22:19:46,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 260 transitions, 2437 flow [2023-01-27 22:19:46,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 260 transitions, 2254 flow, removed 82 selfloop flow, removed 3 redundant places. [2023-01-27 22:19:46,155 INFO L231 Difference]: Finished difference. Result has 105 places, 172 transitions, 1847 flow [2023-01-27 22:19:46,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1847, PETRI_PLACES=105, PETRI_TRANSITIONS=172} [2023-01-27 22:19:46,157 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 84 predicate places. [2023-01-27 22:19:46,157 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 172 transitions, 1847 flow [2023-01-27 22:19:46,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.72) internal successors, (2068), 25 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:46,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:46,158 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:46,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 22:19:46,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:46,367 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:46,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:46,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1416627676, now seen corresponding path program 4 times [2023-01-27 22:19:46,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:46,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992204888] [2023-01-27 22:19:46,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:46,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:46,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:46,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992204888] [2023-01-27 22:19:46,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992204888] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:19:46,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355506299] [2023-01-27 22:19:46,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:19:46,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:46,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:19:46,881 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) [2023-01-27 22:19:46,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 22:19:46,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:19:46,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:19:46,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 22:19:46,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:19:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:19:47,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:19:47,086 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 22:19:47,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-01-27 22:19:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:19:47,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355506299] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 22:19:47,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 22:19:47,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 7] total 19 [2023-01-27 22:19:47,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853785010] [2023-01-27 22:19:47,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:19:47,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 22:19:47,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:47,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 22:19:47,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-01-27 22:19:47,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 271 [2023-01-27 22:19:47,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 172 transitions, 1847 flow. Second operand has 6 states, 6 states have (on average 102.66666666666667) internal successors, (616), 6 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:47,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:47,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 271 [2023-01-27 22:19:47,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:47,290 INFO L130 PetriNetUnfolder]: 495/934 cut-off events. [2023-01-27 22:19:47,290 INFO L131 PetriNetUnfolder]: For 6085/6085 co-relation queries the response was YES. [2023-01-27 22:19:47,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5535 conditions, 934 events. 495/934 cut-off events. For 6085/6085 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4588 event pairs, 81 based on Foata normal form. 2/936 useless extension candidates. Maximal degree in co-relation 5497. Up to 400 conditions per place. [2023-01-27 22:19:47,297 INFO L137 encePairwiseOnDemand]: 265/271 looper letters, 122 selfloop transitions, 66 changer transitions 1/189 dead transitions. [2023-01-27 22:19:47,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 189 transitions, 2376 flow [2023-01-27 22:19:47,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 22:19:47,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 22:19:47,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 641 transitions. [2023-01-27 22:19:47,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942189421894219 [2023-01-27 22:19:47,299 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 641 transitions. [2023-01-27 22:19:47,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 641 transitions. [2023-01-27 22:19:47,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:47,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 641 transitions. [2023-01-27 22:19:47,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.83333333333333) internal successors, (641), 6 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:47,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:47,302 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:47,302 INFO L175 Difference]: Start difference. First operand has 105 places, 172 transitions, 1847 flow. Second operand 6 states and 641 transitions. [2023-01-27 22:19:47,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 189 transitions, 2376 flow [2023-01-27 22:19:47,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 189 transitions, 2126 flow, removed 118 selfloop flow, removed 7 redundant places. [2023-01-27 22:19:47,331 INFO L231 Difference]: Finished difference. Result has 100 places, 169 transitions, 1777 flow [2023-01-27 22:19:47,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1521, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1777, PETRI_PLACES=100, PETRI_TRANSITIONS=169} [2023-01-27 22:19:47,333 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-01-27 22:19:47,333 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 169 transitions, 1777 flow [2023-01-27 22:19:47,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 102.66666666666667) internal successors, (616), 6 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:47,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:47,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:47,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 22:19:47,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:47,538 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:47,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:47,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1886042083, now seen corresponding path program 1 times [2023-01-27 22:19:47,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:47,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736149070] [2023-01-27 22:19:47,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:47,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:48,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:48,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736149070] [2023-01-27 22:19:48,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736149070] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:19:48,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909025394] [2023-01-27 22:19:48,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:48,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:48,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:19:48,200 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) [2023-01-27 22:19:48,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 22:19:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-27 22:19:48,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:19:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:19:48,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:19:48,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:19:48,785 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 32 [2023-01-27 22:19:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:19:48,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909025394] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:19:48,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:19:48,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 27 [2023-01-27 22:19:48,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823968993] [2023-01-27 22:19:48,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:19:48,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 22:19:48,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:48,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 22:19:48,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-01-27 22:19:48,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-27 22:19:48,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 169 transitions, 1777 flow. Second operand has 29 states, 29 states have (on average 76.82758620689656) internal successors, (2228), 29 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:48,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:48,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-27 22:19:48,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:50,328 INFO L130 PetriNetUnfolder]: 532/1008 cut-off events. [2023-01-27 22:19:50,328 INFO L131 PetriNetUnfolder]: For 6967/6967 co-relation queries the response was YES. [2023-01-27 22:19:50,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5818 conditions, 1008 events. 532/1008 cut-off events. For 6967/6967 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5106 event pairs, 69 based on Foata normal form. 2/1010 useless extension candidates. Maximal degree in co-relation 5781. Up to 500 conditions per place. [2023-01-27 22:19:50,335 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 144 selfloop transitions, 83 changer transitions 7/234 dead transitions. [2023-01-27 22:19:50,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 234 transitions, 2775 flow [2023-01-27 22:19:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 22:19:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 22:19:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1592 transitions. [2023-01-27 22:19:50,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2937269372693727 [2023-01-27 22:19:50,338 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1592 transitions. [2023-01-27 22:19:50,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1592 transitions. [2023-01-27 22:19:50,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:50,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1592 transitions. [2023-01-27 22:19:50,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 79.6) internal successors, (1592), 20 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:50,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:50,345 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:50,346 INFO L175 Difference]: Start difference. First operand has 100 places, 169 transitions, 1777 flow. Second operand 20 states and 1592 transitions. [2023-01-27 22:19:50,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 234 transitions, 2775 flow [2023-01-27 22:19:50,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 234 transitions, 2747 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-01-27 22:19:50,421 INFO L231 Difference]: Finished difference. Result has 125 places, 186 transitions, 2181 flow [2023-01-27 22:19:50,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2181, PETRI_PLACES=125, PETRI_TRANSITIONS=186} [2023-01-27 22:19:50,421 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 104 predicate places. [2023-01-27 22:19:50,422 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 186 transitions, 2181 flow [2023-01-27 22:19:50,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 76.82758620689656) internal successors, (2228), 29 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:50,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:50,427 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:50,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 22:19:50,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-27 22:19:50,633 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:50,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:50,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2035982271, now seen corresponding path program 2 times [2023-01-27 22:19:50,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:50,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855669210] [2023-01-27 22:19:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:50,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:51,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:51,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855669210] [2023-01-27 22:19:51,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855669210] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:19:51,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611290069] [2023-01-27 22:19:51,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:19:51,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:51,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:19:51,287 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) [2023-01-27 22:19:51,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 22:19:51,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:19:51,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:19:51,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-27 22:19:51,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:19:51,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-01-27 22:19:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:19:51,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:19:52,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:19:52,086 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 32 [2023-01-27 22:19:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:19:52,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611290069] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:19:52,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:19:52,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 26 [2023-01-27 22:19:52,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741459058] [2023-01-27 22:19:52,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:19:52,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 22:19:52,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:52,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 22:19:52,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-01-27 22:19:52,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-27 22:19:52,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 186 transitions, 2181 flow. Second operand has 28 states, 28 states have (on average 76.89285714285714) internal successors, (2153), 28 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:52,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:52,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-27 22:19:52,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:53,166 INFO L130 PetriNetUnfolder]: 594/1157 cut-off events. [2023-01-27 22:19:53,167 INFO L131 PetriNetUnfolder]: For 9032/9032 co-relation queries the response was YES. [2023-01-27 22:19:53,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7172 conditions, 1157 events. 594/1157 cut-off events. For 9032/9032 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6337 event pairs, 60 based on Foata normal form. 2/1159 useless extension candidates. Maximal degree in co-relation 7127. Up to 849 conditions per place. [2023-01-27 22:19:53,174 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 182 selfloop transitions, 80 changer transitions 6/268 dead transitions. [2023-01-27 22:19:53,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 268 transitions, 3315 flow [2023-01-27 22:19:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 22:19:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 22:19:53,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1686 transitions. [2023-01-27 22:19:53,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2962572482867686 [2023-01-27 22:19:53,176 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1686 transitions. [2023-01-27 22:19:53,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1686 transitions. [2023-01-27 22:19:53,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:53,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1686 transitions. [2023-01-27 22:19:53,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 80.28571428571429) internal successors, (1686), 21 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:53,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:53,183 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:53,183 INFO L175 Difference]: Start difference. First operand has 125 places, 186 transitions, 2181 flow. Second operand 21 states and 1686 transitions. [2023-01-27 22:19:53,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 268 transitions, 3315 flow [2023-01-27 22:19:53,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 268 transitions, 3234 flow, removed 23 selfloop flow, removed 7 redundant places. [2023-01-27 22:19:53,213 INFO L231 Difference]: Finished difference. Result has 144 places, 211 transitions, 2648 flow [2023-01-27 22:19:53,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2102, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2648, PETRI_PLACES=144, PETRI_TRANSITIONS=211} [2023-01-27 22:19:53,214 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 123 predicate places. [2023-01-27 22:19:53,214 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 211 transitions, 2648 flow [2023-01-27 22:19:53,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 76.89285714285714) internal successors, (2153), 28 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:53,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:53,215 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:53,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-27 22:19:53,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:53,420 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:53,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:53,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1472029166, now seen corresponding path program 5 times [2023-01-27 22:19:53,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:53,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445763208] [2023-01-27 22:19:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:53,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:53,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:53,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445763208] [2023-01-27 22:19:53,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445763208] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:19:53,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538694203] [2023-01-27 22:19:53,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:19:53,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:53,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:19:53,942 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) [2023-01-27 22:19:53,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 22:19:54,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 22:19:54,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:19:54,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-27 22:19:54,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:19:54,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:19:54,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-27 22:19:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:19:54,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:19:54,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:19:54,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-01-27 22:19:54,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-27 22:19:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:19:54,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538694203] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:19:54,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:19:54,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 21 [2023-01-27 22:19:54,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985441048] [2023-01-27 22:19:54,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:19:54,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 22:19:54,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:54,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 22:19:54,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-01-27 22:19:54,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-01-27 22:19:54,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 211 transitions, 2648 flow. Second operand has 22 states, 22 states have (on average 83.0909090909091) internal successors, (1828), 22 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:54,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:54,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-01-27 22:19:54,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:55,249 INFO L130 PetriNetUnfolder]: 709/1363 cut-off events. [2023-01-27 22:19:55,250 INFO L131 PetriNetUnfolder]: For 14118/14118 co-relation queries the response was YES. [2023-01-27 22:19:55,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9067 conditions, 1363 events. 709/1363 cut-off events. For 14118/14118 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7680 event pairs, 56 based on Foata normal form. 16/1379 useless extension candidates. Maximal degree in co-relation 9015. Up to 461 conditions per place. [2023-01-27 22:19:55,260 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 168 selfloop transitions, 138 changer transitions 2/308 dead transitions. [2023-01-27 22:19:55,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 308 transitions, 4300 flow [2023-01-27 22:19:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 22:19:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 22:19:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1633 transitions. [2023-01-27 22:19:55,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31714896096329387 [2023-01-27 22:19:55,265 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1633 transitions. [2023-01-27 22:19:55,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1633 transitions. [2023-01-27 22:19:55,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:55,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1633 transitions. [2023-01-27 22:19:55,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.94736842105263) internal successors, (1633), 19 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:55,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:55,272 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:55,272 INFO L175 Difference]: Start difference. First operand has 144 places, 211 transitions, 2648 flow. Second operand 19 states and 1633 transitions. [2023-01-27 22:19:55,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 308 transitions, 4300 flow [2023-01-27 22:19:55,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 308 transitions, 4147 flow, removed 38 selfloop flow, removed 10 redundant places. [2023-01-27 22:19:55,326 INFO L231 Difference]: Finished difference. Result has 156 places, 244 transitions, 3437 flow [2023-01-27 22:19:55,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3437, PETRI_PLACES=156, PETRI_TRANSITIONS=244} [2023-01-27 22:19:55,326 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 135 predicate places. [2023-01-27 22:19:55,326 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 244 transitions, 3437 flow [2023-01-27 22:19:55,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 83.0909090909091) internal successors, (1828), 22 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:55,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:55,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:55,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 22:19:55,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:55,532 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:55,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:55,532 INFO L85 PathProgramCache]: Analyzing trace with hash 154671513, now seen corresponding path program 3 times [2023-01-27 22:19:55,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:55,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758360885] [2023-01-27 22:19:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:55,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:56,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:56,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758360885] [2023-01-27 22:19:56,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758360885] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:19:56,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280594542] [2023-01-27 22:19:56,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:19:56,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:56,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:19:56,063 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) [2023-01-27 22:19:56,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 22:19:56,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 22:19:56,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:19:56,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 22:19:56,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:19:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:19:56,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:19:56,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:19:56,979 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 32 [2023-01-27 22:19:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:19:57,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280594542] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:19:57,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:19:57,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-01-27 22:19:57,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618964697] [2023-01-27 22:19:57,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:19:57,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 22:19:57,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:57,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 22:19:57,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-01-27 22:19:57,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-27 22:19:57,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 244 transitions, 3437 flow. Second operand has 27 states, 27 states have (on average 76.96296296296296) internal successors, (2078), 27 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:57,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:57,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-27 22:19:57,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:57,757 INFO L130 PetriNetUnfolder]: 716/1388 cut-off events. [2023-01-27 22:19:57,757 INFO L131 PetriNetUnfolder]: For 16099/16099 co-relation queries the response was YES. [2023-01-27 22:19:57,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9866 conditions, 1388 events. 716/1388 cut-off events. For 16099/16099 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7948 event pairs, 161 based on Foata normal form. 2/1390 useless extension candidates. Maximal degree in co-relation 9809. Up to 1204 conditions per place. [2023-01-27 22:19:57,768 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 211 selfloop transitions, 56 changer transitions 14/281 dead transitions. [2023-01-27 22:19:57,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 281 transitions, 4234 flow [2023-01-27 22:19:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 22:19:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 22:19:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1432 transitions. [2023-01-27 22:19:57,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2935629356293563 [2023-01-27 22:19:57,770 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1432 transitions. [2023-01-27 22:19:57,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1432 transitions. [2023-01-27 22:19:57,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:57,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1432 transitions. [2023-01-27 22:19:57,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 79.55555555555556) internal successors, (1432), 18 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:57,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 271.0) internal successors, (5149), 19 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:57,776 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 271.0) internal successors, (5149), 19 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:57,776 INFO L175 Difference]: Start difference. First operand has 156 places, 244 transitions, 3437 flow. Second operand 18 states and 1432 transitions. [2023-01-27 22:19:57,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 281 transitions, 4234 flow [2023-01-27 22:19:57,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 281 transitions, 4131 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-01-27 22:19:57,835 INFO L231 Difference]: Finished difference. Result has 167 places, 246 transitions, 3489 flow [2023-01-27 22:19:57,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3489, PETRI_PLACES=167, PETRI_TRANSITIONS=246} [2023-01-27 22:19:57,836 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2023-01-27 22:19:57,836 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 246 transitions, 3489 flow [2023-01-27 22:19:57,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 76.96296296296296) internal successors, (2078), 27 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:57,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:57,836 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:57,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 22:19:58,036 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,SelfDestructingSolverStorable13 [2023-01-27 22:19:58,037 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:58,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:58,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1818685831, now seen corresponding path program 4 times [2023-01-27 22:19:58,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:58,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703399546] [2023-01-27 22:19:58,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:58,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:58,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:58,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703399546] [2023-01-27 22:19:58,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703399546] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:19:58,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32438524] [2023-01-27 22:19:58,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:19:58,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:58,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:19:58,656 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) [2023-01-27 22:19:58,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 22:19:58,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:19:58,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:19:58,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-27 22:19:58,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:19:58,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-27 22:19:58,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-27 22:19:58,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 22:19:58,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 22:19:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:59,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:19:59,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:19:59,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2023-01-27 22:19:59,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2023-01-27 22:19:59,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-01-27 22:19:59,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-01-27 22:19:59,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-01-27 22:19:59,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:19:59,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 61 [2023-01-27 22:20:00,006 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 22:20:00,006 INFO L350 Elim1Store]: Elim1 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 300 treesize of output 271 [2023-01-27 22:20:00,014 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:20:00,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 92 treesize of output 80 [2023-01-27 22:20:00,024 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 22:20:00,024 INFO L350 Elim1Store]: Elim1 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 91 treesize of output 67 [2023-01-27 22:20:00,037 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-01-27 22:20:00,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 1 [2023-01-27 22:20:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:00,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32438524] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:00,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:00,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-01-27 22:20:00,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778836446] [2023-01-27 22:20:00,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:00,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-27 22:20:00,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:00,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-27 22:20:00,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=958, Unknown=5, NotChecked=0, Total=1122 [2023-01-27 22:20:00,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-27 22:20:00,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 246 transitions, 3489 flow. Second operand has 34 states, 34 states have (on average 69.58823529411765) internal successors, (2366), 34 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:00,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:00,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-27 22:20:00,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:04,838 INFO L130 PetriNetUnfolder]: 834/1618 cut-off events. [2023-01-27 22:20:04,838 INFO L131 PetriNetUnfolder]: For 21389/21389 co-relation queries the response was YES. [2023-01-27 22:20:04,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12002 conditions, 1618 events. 834/1618 cut-off events. For 21389/21389 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9617 event pairs, 64 based on Foata normal form. 4/1622 useless extension candidates. Maximal degree in co-relation 11940. Up to 858 conditions per place. [2023-01-27 22:20:04,855 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 184 selfloop transitions, 179 changer transitions 11/374 dead transitions. [2023-01-27 22:20:04,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 374 transitions, 5695 flow [2023-01-27 22:20:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 22:20:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 22:20:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2253 transitions. [2023-01-27 22:20:04,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26818235924294725 [2023-01-27 22:20:04,861 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2253 transitions. [2023-01-27 22:20:04,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2253 transitions. [2023-01-27 22:20:04,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:04,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2253 transitions. [2023-01-27 22:20:04,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 72.6774193548387) internal successors, (2253), 31 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:04,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:04,872 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:04,872 INFO L175 Difference]: Start difference. First operand has 167 places, 246 transitions, 3489 flow. Second operand 31 states and 2253 transitions. [2023-01-27 22:20:04,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 374 transitions, 5695 flow [2023-01-27 22:20:04,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 374 transitions, 5549 flow, removed 8 selfloop flow, removed 14 redundant places. [2023-01-27 22:20:04,941 INFO L231 Difference]: Finished difference. Result has 192 places, 304 transitions, 4934 flow [2023-01-27 22:20:04,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4934, PETRI_PLACES=192, PETRI_TRANSITIONS=304} [2023-01-27 22:20:04,941 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2023-01-27 22:20:04,941 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 304 transitions, 4934 flow [2023-01-27 22:20:04,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 69.58823529411765) internal successors, (2366), 34 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:04,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:04,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:04,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-01-27 22:20:05,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 22:20:05,147 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:05,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:05,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2088997291, now seen corresponding path program 5 times [2023-01-27 22:20:05,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:05,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665412836] [2023-01-27 22:20:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:05,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:05,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:05,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665412836] [2023-01-27 22:20:05,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665412836] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:05,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684616671] [2023-01-27 22:20:05,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:20:05,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:05,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:05,691 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) [2023-01-27 22:20:05,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 22:20:05,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:20:05,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:20:05,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-27 22:20:05,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:20:06,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:06,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:20:06,184 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 37 [2023-01-27 22:20:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:20:06,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684616671] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:06,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:06,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-01-27 22:20:06,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576427487] [2023-01-27 22:20:06,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:06,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 22:20:06,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:06,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 22:20:06,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-01-27 22:20:06,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-27 22:20:06,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 304 transitions, 4934 flow. Second operand has 28 states, 28 states have (on average 76.85714285714286) internal successors, (2152), 28 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:06,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:06,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-27 22:20:06,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:08,572 INFO L130 PetriNetUnfolder]: 841/1627 cut-off events. [2023-01-27 22:20:08,573 INFO L131 PetriNetUnfolder]: For 25619/25619 co-relation queries the response was YES. [2023-01-27 22:20:08,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13059 conditions, 1627 events. 841/1627 cut-off events. For 25619/25619 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9680 event pairs, 112 based on Foata normal form. 2/1629 useless extension candidates. Maximal degree in co-relation 12988. Up to 938 conditions per place. [2023-01-27 22:20:08,584 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 225 selfloop transitions, 113 changer transitions 14/352 dead transitions. [2023-01-27 22:20:08,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 352 transitions, 6148 flow [2023-01-27 22:20:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 22:20:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 22:20:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1578 transitions. [2023-01-27 22:20:08,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2911439114391144 [2023-01-27 22:20:08,586 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1578 transitions. [2023-01-27 22:20:08,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1578 transitions. [2023-01-27 22:20:08,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:08,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1578 transitions. [2023-01-27 22:20:08,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 78.9) internal successors, (1578), 20 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:08,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:08,592 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:08,592 INFO L175 Difference]: Start difference. First operand has 192 places, 304 transitions, 4934 flow. Second operand 20 states and 1578 transitions. [2023-01-27 22:20:08,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 352 transitions, 6148 flow [2023-01-27 22:20:08,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 352 transitions, 5949 flow, removed 89 selfloop flow, removed 9 redundant places. [2023-01-27 22:20:08,719 INFO L231 Difference]: Finished difference. Result has 205 places, 313 transitions, 5210 flow [2023-01-27 22:20:08,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4753, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5210, PETRI_PLACES=205, PETRI_TRANSITIONS=313} [2023-01-27 22:20:08,720 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2023-01-27 22:20:08,720 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 313 transitions, 5210 flow [2023-01-27 22:20:08,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 76.85714285714286) internal successors, (2152), 28 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:08,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:08,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:08,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 22:20:08,927 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,SelfDestructingSolverStorable15 [2023-01-27 22:20:08,928 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:08,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:08,928 INFO L85 PathProgramCache]: Analyzing trace with hash -348873531, now seen corresponding path program 6 times [2023-01-27 22:20:08,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:08,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335183234] [2023-01-27 22:20:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:08,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:09,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:09,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335183234] [2023-01-27 22:20:09,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335183234] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:09,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130673160] [2023-01-27 22:20:09,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:20:09,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:09,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:09,557 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) [2023-01-27 22:20:09,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 22:20:09,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 22:20:09,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:20:09,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-27 22:20:09,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:09,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:20:09,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-27 22:20:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:20:10,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:10,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:20:10,381 INFO L350 Elim1Store]: Elim1 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 67 treesize of output 59 [2023-01-27 22:20:10,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2023-01-27 22:20:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:20:10,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130673160] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:10,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:10,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 29 [2023-01-27 22:20:10,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891258182] [2023-01-27 22:20:10,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:10,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 22:20:10,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:10,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 22:20:10,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=840, Unknown=2, NotChecked=0, Total=930 [2023-01-27 22:20:10,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-27 22:20:10,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 313 transitions, 5210 flow. Second operand has 31 states, 31 states have (on average 72.64516129032258) internal successors, (2252), 31 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:10,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:10,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-27 22:20:10,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:12,397 INFO L130 PetriNetUnfolder]: 854/1652 cut-off events. [2023-01-27 22:20:12,397 INFO L131 PetriNetUnfolder]: For 28566/28566 co-relation queries the response was YES. [2023-01-27 22:20:12,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13376 conditions, 1652 events. 854/1652 cut-off events. For 28566/28566 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9903 event pairs, 96 based on Foata normal form. 2/1654 useless extension candidates. Maximal degree in co-relation 13301. Up to 894 conditions per place. [2023-01-27 22:20:12,408 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 214 selfloop transitions, 152 changer transitions 6/372 dead transitions. [2023-01-27 22:20:12,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 372 transitions, 6564 flow [2023-01-27 22:20:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 22:20:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 22:20:12,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1512 transitions. [2023-01-27 22:20:12,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2789667896678967 [2023-01-27 22:20:12,419 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1512 transitions. [2023-01-27 22:20:12,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1512 transitions. [2023-01-27 22:20:12,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:12,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1512 transitions. [2023-01-27 22:20:12,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 75.6) internal successors, (1512), 20 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:12,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:12,424 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:12,424 INFO L175 Difference]: Start difference. First operand has 205 places, 313 transitions, 5210 flow. Second operand 20 states and 1512 transitions. [2023-01-27 22:20:12,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 372 transitions, 6564 flow [2023-01-27 22:20:12,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 372 transitions, 6467 flow, removed 11 selfloop flow, removed 14 redundant places. [2023-01-27 22:20:12,551 INFO L231 Difference]: Finished difference. Result has 214 places, 327 transitions, 5766 flow [2023-01-27 22:20:12,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5113, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5766, PETRI_PLACES=214, PETRI_TRANSITIONS=327} [2023-01-27 22:20:12,551 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 193 predicate places. [2023-01-27 22:20:12,552 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 327 transitions, 5766 flow [2023-01-27 22:20:12,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 72.64516129032258) internal successors, (2252), 31 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:12,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:12,552 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:12,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 22:20:12,757 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,SelfDestructingSolverStorable16 [2023-01-27 22:20:12,757 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:12,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:12,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2032706171, now seen corresponding path program 7 times [2023-01-27 22:20:12,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:12,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779160084] [2023-01-27 22:20:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:12,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:13,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:13,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779160084] [2023-01-27 22:20:13,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779160084] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:13,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28996888] [2023-01-27 22:20:13,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:20:13,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:13,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:13,329 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) [2023-01-27 22:20:13,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 22:20:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:13,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 53 conjunts are in the unsatisfiable core [2023-01-27 22:20:13,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:13,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:20:13,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-27 22:20:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:20:13,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:13,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:20:13,964 INFO L350 Elim1Store]: Elim1 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 59 treesize of output 51 [2023-01-27 22:20:13,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-01-27 22:20:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:20:14,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28996888] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:14,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:14,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-01-27 22:20:14,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019882991] [2023-01-27 22:20:14,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:14,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 22:20:14,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:14,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 22:20:14,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2023-01-27 22:20:14,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-27 22:20:14,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 327 transitions, 5766 flow. Second operand has 31 states, 31 states have (on average 72.6774193548387) internal successors, (2253), 31 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:14,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:14,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-27 22:20:14,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:16,281 INFO L130 PetriNetUnfolder]: 878/1711 cut-off events. [2023-01-27 22:20:16,281 INFO L131 PetriNetUnfolder]: For 34894/34894 co-relation queries the response was YES. [2023-01-27 22:20:16,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14577 conditions, 1711 events. 878/1711 cut-off events. For 34894/34894 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 10476 event pairs, 67 based on Foata normal form. 2/1713 useless extension candidates. Maximal degree in co-relation 14498. Up to 800 conditions per place. [2023-01-27 22:20:16,294 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 206 selfloop transitions, 174 changer transitions 6/386 dead transitions. [2023-01-27 22:20:16,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 386 transitions, 7081 flow [2023-01-27 22:20:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 22:20:16,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 22:20:16,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1518 transitions. [2023-01-27 22:20:16,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28007380073800736 [2023-01-27 22:20:16,296 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1518 transitions. [2023-01-27 22:20:16,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1518 transitions. [2023-01-27 22:20:16,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:16,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1518 transitions. [2023-01-27 22:20:16,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 75.9) internal successors, (1518), 20 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:16,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:16,300 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:16,301 INFO L175 Difference]: Start difference. First operand has 214 places, 327 transitions, 5766 flow. Second operand 20 states and 1518 transitions. [2023-01-27 22:20:16,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 386 transitions, 7081 flow [2023-01-27 22:20:16,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 386 transitions, 6850 flow, removed 40 selfloop flow, removed 11 redundant places. [2023-01-27 22:20:16,456 INFO L231 Difference]: Finished difference. Result has 228 places, 334 transitions, 6104 flow [2023-01-27 22:20:16,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5543, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6104, PETRI_PLACES=228, PETRI_TRANSITIONS=334} [2023-01-27 22:20:16,456 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 207 predicate places. [2023-01-27 22:20:16,456 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 334 transitions, 6104 flow [2023-01-27 22:20:16,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 72.6774193548387) internal successors, (2253), 31 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:16,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:16,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:16,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 22:20:16,662 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,SelfDestructingSolverStorable17 [2023-01-27 22:20:16,662 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:16,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:16,662 INFO L85 PathProgramCache]: Analyzing trace with hash 40572893, now seen corresponding path program 8 times [2023-01-27 22:20:16,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:16,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560958020] [2023-01-27 22:20:16,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:16,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:17,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:17,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560958020] [2023-01-27 22:20:17,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560958020] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:17,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355391021] [2023-01-27 22:20:17,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:20:17,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:17,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:17,299 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) [2023-01-27 22:20:17,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 22:20:17,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:20:17,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:20:17,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 68 conjunts are in the unsatisfiable core [2023-01-27 22:20:17,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:17,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:20:17,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-27 22:20:17,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-01-27 22:20:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:17,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:18,457 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~q_front~0 1))) (or (< .cse0 0) (and (forall ((v_ArrVal_545 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_545) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) c_~N~0)) (= (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296) (mod (+ c_~C~0 c_~x~0) 4294967296))) (<= c_~n~0 .cse0) (< c_~q_back~0 0) (<= c_~n~0 c_~q_back~0) (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0))) is different from false [2023-01-27 22:20:18,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:20:18,487 INFO L350 Elim1Store]: Elim1 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 59 treesize of output 51 [2023-01-27 22:20:18,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-01-27 22:20:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:18,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355391021] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:18,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:18,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-27 22:20:18,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220051520] [2023-01-27 22:20:18,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:18,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 22:20:18,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:18,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 22:20:18,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=971, Unknown=1, NotChecked=64, Total=1190 [2023-01-27 22:20:18,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-27 22:20:18,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 334 transitions, 6104 flow. Second operand has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:18,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:18,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-27 22:20:18,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:23,464 INFO L130 PetriNetUnfolder]: 1213/2300 cut-off events. [2023-01-27 22:20:23,464 INFO L131 PetriNetUnfolder]: For 61246/61246 co-relation queries the response was YES. [2023-01-27 22:20:23,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21075 conditions, 2300 events. 1213/2300 cut-off events. For 61246/61246 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 14626 event pairs, 80 based on Foata normal form. 4/2304 useless extension candidates. Maximal degree in co-relation 20990. Up to 1349 conditions per place. [2023-01-27 22:20:23,482 INFO L137 encePairwiseOnDemand]: 258/271 looper letters, 262 selfloop transitions, 321 changer transitions 21/604 dead transitions. [2023-01-27 22:20:23,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 604 transitions, 11196 flow [2023-01-27 22:20:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-27 22:20:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-27 22:20:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2835 transitions. [2023-01-27 22:20:23,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2827366111498953 [2023-01-27 22:20:23,485 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2835 transitions. [2023-01-27 22:20:23,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2835 transitions. [2023-01-27 22:20:23,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:23,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2835 transitions. [2023-01-27 22:20:23,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 76.62162162162163) internal successors, (2835), 37 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:23,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:23,495 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:23,495 INFO L175 Difference]: Start difference. First operand has 228 places, 334 transitions, 6104 flow. Second operand 37 states and 2835 transitions. [2023-01-27 22:20:23,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 604 transitions, 11196 flow [2023-01-27 22:20:23,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 604 transitions, 10796 flow, removed 58 selfloop flow, removed 12 redundant places. [2023-01-27 22:20:23,741 INFO L231 Difference]: Finished difference. Result has 265 places, 499 transitions, 10002 flow [2023-01-27 22:20:23,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5815, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10002, PETRI_PLACES=265, PETRI_TRANSITIONS=499} [2023-01-27 22:20:23,742 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2023-01-27 22:20:23,742 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 499 transitions, 10002 flow [2023-01-27 22:20:23,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:23,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:23,742 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:23,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 22:20:23,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:23,949 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:23,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:23,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1408326089, now seen corresponding path program 9 times [2023-01-27 22:20:23,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:23,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343465628] [2023-01-27 22:20:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:23,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:24,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:24,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343465628] [2023-01-27 22:20:24,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343465628] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:24,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353122743] [2023-01-27 22:20:24,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:20:24,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:24,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:24,570 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) [2023-01-27 22:20:24,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 22:20:24,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 22:20:24,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:20:24,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 67 conjunts are in the unsatisfiable core [2023-01-27 22:20:24,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:24,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:20:24,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-27 22:20:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:25,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:25,314 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (or (forall ((v_ArrVal_580 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_580) c_~q~0.base) .cse0) 0)) (= (mod c_~x~0 4294967296) (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296))) (forall ((v_ArrVal_580 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_580) c_~q~0.base) .cse0))) (or (= .cse1 0) (= .cse1 c_~N~0)))))) is different from false [2023-01-27 22:20:25,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:20:25,417 INFO L350 Elim1Store]: Elim1 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 118 treesize of output 94 [2023-01-27 22:20:25,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 75 [2023-01-27 22:20:25,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 63 [2023-01-27 22:20:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:25,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353122743] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:25,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:25,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-27 22:20:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345977556] [2023-01-27 22:20:25,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:25,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 22:20:25,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:25,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 22:20:25,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=997, Unknown=1, NotChecked=64, Total=1190 [2023-01-27 22:20:25,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-27 22:20:25,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 499 transitions, 10002 flow. Second operand has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:25,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:25,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-27 22:20:25,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:27,099 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (+ (* c_~q_front~0 4) c_~q~0.offset))) (let ((.cse0 (forall ((v_ArrVal_580 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_580) c_~q~0.base) .cse4) 0))) (.cse1 (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296)) (.cse2 (forall ((v_ArrVal_580 (Array Int Int))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_580) c_~q~0.base) .cse4))) (or (= .cse3 0) (= .cse3 c_~N~0)))))) (and (or .cse0 (= (mod c_~x~0 4294967296) .cse1)) (or (and (or .cse0 (= .cse1 (mod (+ c_~C~0 c_~x~0) 4294967296))) .cse2) (< c_~q_back~0 0) (<= c_~n~0 c_~q_back~0) (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0)) .cse2))) is different from false [2023-01-27 22:20:29,840 INFO L130 PetriNetUnfolder]: 1253/2403 cut-off events. [2023-01-27 22:20:29,840 INFO L131 PetriNetUnfolder]: For 67294/67294 co-relation queries the response was YES. [2023-01-27 22:20:29,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24029 conditions, 2403 events. 1253/2403 cut-off events. For 67294/67294 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 15692 event pairs, 137 based on Foata normal form. 3/2406 useless extension candidates. Maximal degree in co-relation 23931. Up to 1540 conditions per place. [2023-01-27 22:20:29,862 INFO L137 encePairwiseOnDemand]: 257/271 looper letters, 312 selfloop transitions, 282 changer transitions 10/604 dead transitions. [2023-01-27 22:20:29,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 604 transitions, 12362 flow [2023-01-27 22:20:29,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 22:20:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 22:20:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2209 transitions. [2023-01-27 22:20:29,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2810790176867286 [2023-01-27 22:20:29,865 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2209 transitions. [2023-01-27 22:20:29,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2209 transitions. [2023-01-27 22:20:29,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:29,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2209 transitions. [2023-01-27 22:20:29,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 76.17241379310344) internal successors, (2209), 29 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:29,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:29,871 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:29,871 INFO L175 Difference]: Start difference. First operand has 265 places, 499 transitions, 10002 flow. Second operand 29 states and 2209 transitions. [2023-01-27 22:20:29,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 604 transitions, 12362 flow [2023-01-27 22:20:30,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 604 transitions, 11532 flow, removed 371 selfloop flow, removed 18 redundant places. [2023-01-27 22:20:30,235 INFO L231 Difference]: Finished difference. Result has 281 places, 536 transitions, 10710 flow [2023-01-27 22:20:30,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=9302, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10710, PETRI_PLACES=281, PETRI_TRANSITIONS=536} [2023-01-27 22:20:30,236 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 260 predicate places. [2023-01-27 22:20:30,236 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 536 transitions, 10710 flow [2023-01-27 22:20:30,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:30,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:30,236 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:30,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 22:20:30,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:30,441 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:30,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:30,442 INFO L85 PathProgramCache]: Analyzing trace with hash -710169045, now seen corresponding path program 10 times [2023-01-27 22:20:30,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:30,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895670765] [2023-01-27 22:20:30,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:30,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:31,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:31,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895670765] [2023-01-27 22:20:31,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895670765] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:31,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772029275] [2023-01-27 22:20:31,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:20:31,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:31,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:31,011 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) [2023-01-27 22:20:31,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 22:20:31,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:20:31,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:20:31,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-27 22:20:31,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:31,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:31,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:20:31,608 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 34 [2023-01-27 22:20:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:32,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772029275] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:32,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:32,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-01-27 22:20:32,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290737446] [2023-01-27 22:20:32,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:32,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 22:20:32,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:32,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 22:20:32,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2023-01-27 22:20:32,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-27 22:20:32,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 536 transitions, 10710 flow. Second operand has 32 states, 32 states have (on average 76.6875) internal successors, (2454), 32 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:32,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:32,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-27 22:20:32,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:35,305 INFO L130 PetriNetUnfolder]: 1405/2730 cut-off events. [2023-01-27 22:20:35,305 INFO L131 PetriNetUnfolder]: For 65658/65658 co-relation queries the response was YES. [2023-01-27 22:20:35,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27291 conditions, 2730 events. 1405/2730 cut-off events. For 65658/65658 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 18599 event pairs, 114 based on Foata normal form. 3/2733 useless extension candidates. Maximal degree in co-relation 27191. Up to 1137 conditions per place. [2023-01-27 22:20:35,330 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 426 selfloop transitions, 268 changer transitions 15/709 dead transitions. [2023-01-27 22:20:35,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 709 transitions, 14750 flow [2023-01-27 22:20:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 22:20:35,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 22:20:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2577 transitions. [2023-01-27 22:20:35,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2971632841328413 [2023-01-27 22:20:35,333 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2577 transitions. [2023-01-27 22:20:35,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2577 transitions. [2023-01-27 22:20:35,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:35,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2577 transitions. [2023-01-27 22:20:35,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 80.53125) internal successors, (2577), 32 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:35,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:35,377 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:35,377 INFO L175 Difference]: Start difference. First operand has 281 places, 536 transitions, 10710 flow. Second operand 32 states and 2577 transitions. [2023-01-27 22:20:35,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 709 transitions, 14750 flow [2023-01-27 22:20:35,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 709 transitions, 14473 flow, removed 106 selfloop flow, removed 13 redundant places. [2023-01-27 22:20:35,687 INFO L231 Difference]: Finished difference. Result has 308 places, 590 transitions, 12576 flow [2023-01-27 22:20:35,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=10480, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12576, PETRI_PLACES=308, PETRI_TRANSITIONS=590} [2023-01-27 22:20:35,688 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2023-01-27 22:20:35,688 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 590 transitions, 12576 flow [2023-01-27 22:20:35,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 76.6875) internal successors, (2454), 32 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:35,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:35,688 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:35,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-27 22:20:35,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:35,889 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:35,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:35,890 INFO L85 PathProgramCache]: Analyzing trace with hash -451798573, now seen corresponding path program 11 times [2023-01-27 22:20:35,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:35,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271773356] [2023-01-27 22:20:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:35,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:36,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:36,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271773356] [2023-01-27 22:20:36,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271773356] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:36,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891167677] [2023-01-27 22:20:36,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:20:36,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:36,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:36,352 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) [2023-01-27 22:20:36,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 22:20:36,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:20:36,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:20:36,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-27 22:20:36,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:20:36,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:36,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:20:36,804 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 37 [2023-01-27 22:20:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:20:37,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891167677] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:37,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:37,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-01-27 22:20:37,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742173186] [2023-01-27 22:20:37,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:37,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 22:20:37,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:37,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 22:20:37,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2023-01-27 22:20:37,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-27 22:20:37,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 590 transitions, 12576 flow. Second operand has 28 states, 28 states have (on average 76.85714285714286) internal successors, (2152), 28 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:37,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:37,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-27 22:20:37,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:38,657 INFO L130 PetriNetUnfolder]: 1396/2704 cut-off events. [2023-01-27 22:20:38,657 INFO L131 PetriNetUnfolder]: For 71442/71442 co-relation queries the response was YES. [2023-01-27 22:20:38,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27940 conditions, 2704 events. 1396/2704 cut-off events. For 71442/71442 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18324 event pairs, 137 based on Foata normal form. 2/2706 useless extension candidates. Maximal degree in co-relation 27830. Up to 1275 conditions per place. [2023-01-27 22:20:38,682 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 438 selfloop transitions, 208 changer transitions 14/660 dead transitions. [2023-01-27 22:20:38,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 660 transitions, 15042 flow [2023-01-27 22:20:38,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 22:20:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 22:20:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1819 transitions. [2023-01-27 22:20:38,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29183378790309644 [2023-01-27 22:20:38,685 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1819 transitions. [2023-01-27 22:20:38,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1819 transitions. [2023-01-27 22:20:38,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:38,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1819 transitions. [2023-01-27 22:20:38,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 79.08695652173913) internal successors, (1819), 23 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:38,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:38,730 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:38,730 INFO L175 Difference]: Start difference. First operand has 308 places, 590 transitions, 12576 flow. Second operand 23 states and 1819 transitions. [2023-01-27 22:20:38,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 660 transitions, 15042 flow [2023-01-27 22:20:39,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 660 transitions, 14772 flow, removed 85 selfloop flow, removed 15 redundant places. [2023-01-27 22:20:39,112 INFO L231 Difference]: Finished difference. Result has 313 places, 596 transitions, 12998 flow [2023-01-27 22:20:39,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=12322, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12998, PETRI_PLACES=313, PETRI_TRANSITIONS=596} [2023-01-27 22:20:39,113 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 292 predicate places. [2023-01-27 22:20:39,113 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 596 transitions, 12998 flow [2023-01-27 22:20:39,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 76.85714285714286) internal successors, (2152), 28 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:39,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:39,113 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:39,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 22:20:39,314 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,SelfDestructingSolverStorable21 [2023-01-27 22:20:39,314 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:39,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1570660874, now seen corresponding path program 12 times [2023-01-27 22:20:39,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:39,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755574072] [2023-01-27 22:20:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:39,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:20:39,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:39,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755574072] [2023-01-27 22:20:39,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755574072] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:39,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656073375] [2023-01-27 22:20:39,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:20:39,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:39,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:39,375 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) [2023-01-27 22:20:39,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 22:20:39,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 22:20:39,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:20:39,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:20:39,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:20:39,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:20:39,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656073375] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:39,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:39,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 10 [2023-01-27 22:20:39,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200625229] [2023-01-27 22:20:39,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:39,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 22:20:39,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 22:20:39,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2023-01-27 22:20:39,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-01-27 22:20:39,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 596 transitions, 12998 flow. Second operand has 11 states, 11 states have (on average 121.63636363636364) internal successors, (1338), 11 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:39,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:39,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-01-27 22:20:39,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:40,312 INFO L130 PetriNetUnfolder]: 1564/3053 cut-off events. [2023-01-27 22:20:40,312 INFO L131 PetriNetUnfolder]: For 99287/99303 co-relation queries the response was YES. [2023-01-27 22:20:40,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31488 conditions, 3053 events. 1564/3053 cut-off events. For 99287/99303 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21256 event pairs, 167 based on Foata normal form. 124/3174 useless extension candidates. Maximal degree in co-relation 31382. Up to 1321 conditions per place. [2023-01-27 22:20:40,339 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 247 selfloop transitions, 367 changer transitions 100/724 dead transitions. [2023-01-27 22:20:40,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 724 transitions, 16783 flow [2023-01-27 22:20:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 22:20:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 22:20:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 642 transitions. [2023-01-27 22:20:40,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738007380073801 [2023-01-27 22:20:40,341 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 642 transitions. [2023-01-27 22:20:40,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 642 transitions. [2023-01-27 22:20:40,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:40,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 642 transitions. [2023-01-27 22:20:40,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:40,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:40,343 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:40,343 INFO L175 Difference]: Start difference. First operand has 313 places, 596 transitions, 12998 flow. Second operand 5 states and 642 transitions. [2023-01-27 22:20:40,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 724 transitions, 16783 flow [2023-01-27 22:20:40,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 724 transitions, 16362 flow, removed 35 selfloop flow, removed 21 redundant places. [2023-01-27 22:20:40,808 INFO L231 Difference]: Finished difference. Result has 295 places, 594 transitions, 13603 flow [2023-01-27 22:20:40,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=12584, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=13603, PETRI_PLACES=295, PETRI_TRANSITIONS=594} [2023-01-27 22:20:40,809 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 274 predicate places. [2023-01-27 22:20:40,809 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 594 transitions, 13603 flow [2023-01-27 22:20:40,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 121.63636363636364) internal successors, (1338), 11 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:40,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:40,809 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:40,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-27 22:20:41,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:41,010 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:41,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:41,010 INFO L85 PathProgramCache]: Analyzing trace with hash 791885478, now seen corresponding path program 13 times [2023-01-27 22:20:41,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:41,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744124350] [2023-01-27 22:20:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:41,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:20:41,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:41,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744124350] [2023-01-27 22:20:41,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744124350] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:41,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371612946] [2023-01-27 22:20:41,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:20:41,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:41,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:41,087 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) [2023-01-27 22:20:41,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 22:20:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:41,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:20:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:20:41,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:20:41,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371612946] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:41,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:41,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-27 22:20:41,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856965644] [2023-01-27 22:20:41,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:41,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 22:20:41,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:41,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 22:20:41,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-01-27 22:20:41,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 271 [2023-01-27 22:20:41,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 594 transitions, 13603 flow. Second operand has 18 states, 18 states have (on average 107.77777777777777) internal successors, (1940), 18 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:41,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:41,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 271 [2023-01-27 22:20:41,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:41,618 INFO L130 PetriNetUnfolder]: 510/1065 cut-off events. [2023-01-27 22:20:41,619 INFO L131 PetriNetUnfolder]: For 44438/44451 co-relation queries the response was YES. [2023-01-27 22:20:41,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12167 conditions, 1065 events. 510/1065 cut-off events. For 44438/44451 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6152 event pairs, 142 based on Foata normal form. 164/1226 useless extension candidates. Maximal degree in co-relation 12062. Up to 873 conditions per place. [2023-01-27 22:20:41,665 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 193 selfloop transitions, 4 changer transitions 69/274 dead transitions. [2023-01-27 22:20:41,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 274 transitions, 6670 flow [2023-01-27 22:20:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 22:20:41,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 22:20:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 888 transitions. [2023-01-27 22:20:41,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095940959409594 [2023-01-27 22:20:41,666 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 888 transitions. [2023-01-27 22:20:41,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 888 transitions. [2023-01-27 22:20:41,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:41,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 888 transitions. [2023-01-27 22:20:41,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.0) internal successors, (888), 8 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:41,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:41,668 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:41,668 INFO L175 Difference]: Start difference. First operand has 295 places, 594 transitions, 13603 flow. Second operand 8 states and 888 transitions. [2023-01-27 22:20:41,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 274 transitions, 6670 flow [2023-01-27 22:20:41,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 274 transitions, 5745 flow, removed 243 selfloop flow, removed 46 redundant places. [2023-01-27 22:20:41,801 INFO L231 Difference]: Finished difference. Result has 208 places, 205 transitions, 4097 flow [2023-01-27 22:20:41,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5155, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4097, PETRI_PLACES=208, PETRI_TRANSITIONS=205} [2023-01-27 22:20:41,802 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 187 predicate places. [2023-01-27 22:20:41,802 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 205 transitions, 4097 flow [2023-01-27 22:20:41,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 107.77777777777777) internal successors, (1940), 18 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:41,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:41,802 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:41,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-27 22:20:42,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:42,007 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:42,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:42,007 INFO L85 PathProgramCache]: Analyzing trace with hash 2018294689, now seen corresponding path program 14 times [2023-01-27 22:20:42,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:42,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650263938] [2023-01-27 22:20:42,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:42,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:42,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:42,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650263938] [2023-01-27 22:20:42,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650263938] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:42,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421064193] [2023-01-27 22:20:42,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:20:42,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:42,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:42,667 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:20:42,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 22:20:42,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:20:42,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:20:42,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 63 conjunts are in the unsatisfiable core [2023-01-27 22:20:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:20:43,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:43,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:20:43,381 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 34 [2023-01-27 22:20:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:20:45,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421064193] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:45,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:45,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 27 [2023-01-27 22:20:45,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700021615] [2023-01-27 22:20:45,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:45,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 22:20:45,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:45,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 22:20:45,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-01-27 22:20:45,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-27 22:20:45,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 205 transitions, 4097 flow. Second operand has 29 states, 29 states have (on average 76.89655172413794) internal successors, (2230), 29 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:45,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:45,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-27 22:20:45,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:46,180 INFO L130 PetriNetUnfolder]: 469/921 cut-off events. [2023-01-27 22:20:46,180 INFO L131 PetriNetUnfolder]: For 15913/15913 co-relation queries the response was YES. [2023-01-27 22:20:46,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8447 conditions, 921 events. 469/921 cut-off events. For 15913/15913 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4719 event pairs, 76 based on Foata normal form. 1/921 useless extension candidates. Maximal degree in co-relation 8381. Up to 774 conditions per place. [2023-01-27 22:20:46,186 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 159 selfloop transitions, 52 changer transitions 31/242 dead transitions. [2023-01-27 22:20:46,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 242 transitions, 4842 flow [2023-01-27 22:20:46,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 22:20:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 22:20:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1500 transitions. [2023-01-27 22:20:46,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2913187026607108 [2023-01-27 22:20:46,187 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1500 transitions. [2023-01-27 22:20:46,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1500 transitions. [2023-01-27 22:20:46,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:46,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1500 transitions. [2023-01-27 22:20:46,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 78.94736842105263) internal successors, (1500), 19 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:46,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:46,191 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:46,192 INFO L175 Difference]: Start difference. First operand has 208 places, 205 transitions, 4097 flow. Second operand 19 states and 1500 transitions. [2023-01-27 22:20:46,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 242 transitions, 4842 flow [2023-01-27 22:20:46,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 242 transitions, 4563 flow, removed 56 selfloop flow, removed 14 redundant places. [2023-01-27 22:20:46,231 INFO L231 Difference]: Finished difference. Result has 175 places, 194 transitions, 3632 flow [2023-01-27 22:20:46,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3853, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3632, PETRI_PLACES=175, PETRI_TRANSITIONS=194} [2023-01-27 22:20:46,231 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2023-01-27 22:20:46,231 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 194 transitions, 3632 flow [2023-01-27 22:20:46,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 76.89655172413794) internal successors, (2230), 29 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:46,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:46,232 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:46,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 22:20:46,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:46,432 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:46,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:46,433 INFO L85 PathProgramCache]: Analyzing trace with hash 630323962, now seen corresponding path program 15 times [2023-01-27 22:20:46,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:46,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714132697] [2023-01-27 22:20:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:46,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:46,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:46,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714132697] [2023-01-27 22:20:46,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714132697] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:46,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478393449] [2023-01-27 22:20:46,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:20:46,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:46,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:46,726 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:20:46,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 22:20:46,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 22:20:46,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:20:46,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 22:20:46,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:20:47,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:47,202 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-27 22:20:47,202 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2023-01-27 22:20:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:20:47,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478393449] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:47,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:47,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 21 [2023-01-27 22:20:47,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584565667] [2023-01-27 22:20:47,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:47,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 22:20:47,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:47,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 22:20:47,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-01-27 22:20:47,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 271 [2023-01-27 22:20:47,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 194 transitions, 3632 flow. Second operand has 22 states, 22 states have (on average 91.36363636363636) internal successors, (2010), 22 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:47,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:47,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 271 [2023-01-27 22:20:47,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:48,366 INFO L130 PetriNetUnfolder]: 732/1380 cut-off events. [2023-01-27 22:20:48,367 INFO L131 PetriNetUnfolder]: For 22017/22017 co-relation queries the response was YES. [2023-01-27 22:20:48,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11435 conditions, 1380 events. 732/1380 cut-off events. For 22017/22017 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7457 event pairs, 59 based on Foata normal form. 88/1467 useless extension candidates. Maximal degree in co-relation 11373. Up to 413 conditions per place. [2023-01-27 22:20:48,376 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 209 selfloop transitions, 205 changer transitions 1/415 dead transitions. [2023-01-27 22:20:48,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 415 transitions, 6963 flow [2023-01-27 22:20:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-27 22:20:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-27 22:20:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3249 transitions. [2023-01-27 22:20:48,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526155849793792 [2023-01-27 22:20:48,379 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3249 transitions. [2023-01-27 22:20:48,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3249 transitions. [2023-01-27 22:20:48,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:48,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3249 transitions. [2023-01-27 22:20:48,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 95.55882352941177) internal successors, (3249), 34 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:48,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:48,411 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:48,411 INFO L175 Difference]: Start difference. First operand has 175 places, 194 transitions, 3632 flow. Second operand 34 states and 3249 transitions. [2023-01-27 22:20:48,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 415 transitions, 6963 flow [2023-01-27 22:20:48,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 415 transitions, 6651 flow, removed 56 selfloop flow, removed 18 redundant places. [2023-01-27 22:20:48,454 INFO L231 Difference]: Finished difference. Result has 195 places, 278 transitions, 5289 flow [2023-01-27 22:20:48,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3351, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5289, PETRI_PLACES=195, PETRI_TRANSITIONS=278} [2023-01-27 22:20:48,454 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 174 predicate places. [2023-01-27 22:20:48,454 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 278 transitions, 5289 flow [2023-01-27 22:20:48,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 91.36363636363636) internal successors, (2010), 22 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:48,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:48,455 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:48,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-01-27 22:20:48,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-27 22:20:48,655 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:48,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:48,656 INFO L85 PathProgramCache]: Analyzing trace with hash 623757512, now seen corresponding path program 16 times [2023-01-27 22:20:48,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:48,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436748232] [2023-01-27 22:20:48,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:48,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:49,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:49,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436748232] [2023-01-27 22:20:49,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436748232] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:49,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439167428] [2023-01-27 22:20:49,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:20:49,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:49,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:49,151 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:20:49,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 22:20:49,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:20:49,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:20:49,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-27 22:20:49,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:49,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:20:49,433 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 21 [2023-01-27 22:20:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:49,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:49,539 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_834 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_834) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2023-01-27 22:20:49,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:20:49,584 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 40 [2023-01-27 22:20:49,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-01-27 22:20:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:49,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439167428] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:49,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:49,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-27 22:20:49,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556731282] [2023-01-27 22:20:49,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:49,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 22:20:49,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:49,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 22:20:49,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=804, Unknown=2, NotChecked=58, Total=992 [2023-01-27 22:20:49,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-01-27 22:20:49,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 278 transitions, 5289 flow. Second operand has 32 states, 32 states have (on average 91.65625) internal successors, (2933), 32 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:49,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:49,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-01-27 22:20:49,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:50,623 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_834 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_834) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))))) (and .cse0 (or (< c_~q_back~0 0) .cse0 (<= c_~n~0 c_~q_back~0)))) is different from false [2023-01-27 22:20:52,534 INFO L130 PetriNetUnfolder]: 1606/3004 cut-off events. [2023-01-27 22:20:52,534 INFO L131 PetriNetUnfolder]: For 56871/56881 co-relation queries the response was YES. [2023-01-27 22:20:52,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26916 conditions, 3004 events. 1606/3004 cut-off events. For 56871/56881 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19254 event pairs, 114 based on Foata normal form. 107/3106 useless extension candidates. Maximal degree in co-relation 26849. Up to 981 conditions per place. [2023-01-27 22:20:52,559 INFO L137 encePairwiseOnDemand]: 259/271 looper letters, 310 selfloop transitions, 416 changer transitions 0/734 dead transitions. [2023-01-27 22:20:52,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 734 transitions, 13943 flow [2023-01-27 22:20:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-27 22:20:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-27 22:20:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4032 transitions. [2023-01-27 22:20:52,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35424354243542433 [2023-01-27 22:20:52,563 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4032 transitions. [2023-01-27 22:20:52,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4032 transitions. [2023-01-27 22:20:52,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:52,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4032 transitions. [2023-01-27 22:20:52,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 96.0) internal successors, (4032), 42 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:52,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 271.0) internal successors, (11653), 43 states have internal predecessors, (11653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:52,574 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 271.0) internal successors, (11653), 43 states have internal predecessors, (11653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:52,574 INFO L175 Difference]: Start difference. First operand has 195 places, 278 transitions, 5289 flow. Second operand 42 states and 4032 transitions. [2023-01-27 22:20:52,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 734 transitions, 13943 flow [2023-01-27 22:20:52,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 734 transitions, 12368 flow, removed 649 selfloop flow, removed 11 redundant places. [2023-01-27 22:20:52,743 INFO L231 Difference]: Finished difference. Result has 243 places, 606 transitions, 11688 flow [2023-01-27 22:20:52,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4671, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=11688, PETRI_PLACES=243, PETRI_TRANSITIONS=606} [2023-01-27 22:20:52,743 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 222 predicate places. [2023-01-27 22:20:52,743 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 606 transitions, 11688 flow [2023-01-27 22:20:52,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 91.65625) internal successors, (2933), 32 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:52,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:52,744 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:52,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-27 22:20:52,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-27 22:20:52,948 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:52,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:52,949 INFO L85 PathProgramCache]: Analyzing trace with hash -647669827, now seen corresponding path program 17 times [2023-01-27 22:20:52,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:52,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977040316] [2023-01-27 22:20:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:52,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:53,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:53,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977040316] [2023-01-27 22:20:53,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977040316] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:53,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236812694] [2023-01-27 22:20:53,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:20:53,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:53,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:53,668 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:20:53,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 22:20:53,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 22:20:53,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:20:53,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 74 conjunts are in the unsatisfiable core [2023-01-27 22:20:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:20:54,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:54,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:20:54,560 INFO L350 Elim1Store]: Elim1 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 76 treesize of output 70 [2023-01-27 22:20:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:20:54,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236812694] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:54,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:54,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 35 [2023-01-27 22:20:54,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303634454] [2023-01-27 22:20:54,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:54,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-27 22:20:54,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:54,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-27 22:20:54,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2023-01-27 22:20:54,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-27 22:20:54,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 606 transitions, 11688 flow. Second operand has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:54,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:54,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-27 22:20:54,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:58,443 INFO L130 PetriNetUnfolder]: 1732/3240 cut-off events. [2023-01-27 22:20:58,443 INFO L131 PetriNetUnfolder]: For 69618/69618 co-relation queries the response was YES. [2023-01-27 22:20:58,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32251 conditions, 3240 events. 1732/3240 cut-off events. For 69618/69618 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21005 event pairs, 159 based on Foata normal form. 4/3243 useless extension candidates. Maximal degree in co-relation 32166. Up to 1145 conditions per place. [2023-01-27 22:20:58,467 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 428 selfloop transitions, 311 changer transitions 12/751 dead transitions. [2023-01-27 22:20:58,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 751 transitions, 15371 flow [2023-01-27 22:20:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-27 22:20:58,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-27 22:20:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2688 transitions. [2023-01-27 22:20:58,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29172997612329066 [2023-01-27 22:20:58,470 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2688 transitions. [2023-01-27 22:20:58,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2688 transitions. [2023-01-27 22:20:58,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:58,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2688 transitions. [2023-01-27 22:20:58,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 79.05882352941177) internal successors, (2688), 34 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:58,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:58,476 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:58,476 INFO L175 Difference]: Start difference. First operand has 243 places, 606 transitions, 11688 flow. Second operand 34 states and 2688 transitions. [2023-01-27 22:20:58,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 751 transitions, 15371 flow [2023-01-27 22:20:58,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 751 transitions, 13801 flow, removed 736 selfloop flow, removed 7 redundant places. [2023-01-27 22:20:58,782 INFO L231 Difference]: Finished difference. Result has 282 places, 667 transitions, 12332 flow [2023-01-27 22:20:58,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=10165, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=12332, PETRI_PLACES=282, PETRI_TRANSITIONS=667} [2023-01-27 22:20:58,783 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 261 predicate places. [2023-01-27 22:20:58,783 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 667 transitions, 12332 flow [2023-01-27 22:20:58,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:58,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:58,783 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:58,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-27 22:20:58,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-27 22:20:58,989 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:58,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:58,989 INFO L85 PathProgramCache]: Analyzing trace with hash 752855597, now seen corresponding path program 18 times [2023-01-27 22:20:58,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:58,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029416903] [2023-01-27 22:20:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:58,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:59,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:59,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029416903] [2023-01-27 22:20:59,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029416903] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:59,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786743234] [2023-01-27 22:20:59,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:20:59,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:59,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:59,744 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:20:59,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 22:20:59,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 22:20:59,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:20:59,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-27 22:20:59,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:21:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:21:00,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:21:00,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:21:00,779 INFO L350 Elim1Store]: Elim1 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 90 treesize of output 75 [2023-01-27 22:21:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:21:01,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786743234] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:21:01,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:21:01,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-01-27 22:21:01,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471015635] [2023-01-27 22:21:01,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:21:01,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-27 22:21:01,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:21:01,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-27 22:21:01,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2023-01-27 22:21:01,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-27 22:21:01,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 667 transitions, 12332 flow. Second operand has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:21:01,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:21:01,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-27 22:21:01,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:21:09,136 INFO L130 PetriNetUnfolder]: 2041/3784 cut-off events. [2023-01-27 22:21:09,136 INFO L131 PetriNetUnfolder]: For 86198/86198 co-relation queries the response was YES. [2023-01-27 22:21:09,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36331 conditions, 3784 events. 2041/3784 cut-off events. For 86198/86198 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 25252 event pairs, 188 based on Foata normal form. 4/3788 useless extension candidates. Maximal degree in co-relation 36233. Up to 2739 conditions per place. [2023-01-27 22:21:09,167 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 590 selfloop transitions, 293 changer transitions 12/895 dead transitions. [2023-01-27 22:21:09,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 895 transitions, 17803 flow [2023-01-27 22:21:09,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 22:21:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 22:21:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2418 transitions. [2023-01-27 22:21:09,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2974169741697417 [2023-01-27 22:21:09,170 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2418 transitions. [2023-01-27 22:21:09,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2418 transitions. [2023-01-27 22:21:09,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:21:09,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2418 transitions. [2023-01-27 22:21:09,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 80.6) internal successors, (2418), 30 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:21:09,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:21:09,179 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:21:09,179 INFO L175 Difference]: Start difference. First operand has 282 places, 667 transitions, 12332 flow. Second operand 30 states and 2418 transitions. [2023-01-27 22:21:09,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 895 transitions, 17803 flow [2023-01-27 22:21:09,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 895 transitions, 17318 flow, removed 126 selfloop flow, removed 15 redundant places. [2023-01-27 22:21:09,505 INFO L231 Difference]: Finished difference. Result has 308 places, 792 transitions, 15488 flow [2023-01-27 22:21:09,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=11913, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=15488, PETRI_PLACES=308, PETRI_TRANSITIONS=792} [2023-01-27 22:21:09,506 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2023-01-27 22:21:09,506 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 792 transitions, 15488 flow [2023-01-27 22:21:09,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:21:09,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:21:09,507 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:21:09,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-27 22:21:09,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:21:09,708 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:21:09,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:21:09,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1567382327, now seen corresponding path program 19 times [2023-01-27 22:21:09,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:21:09,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862057034] [2023-01-27 22:21:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:21:09,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:21:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:21:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:21:10,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:21:10,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862057034] [2023-01-27 22:21:10,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862057034] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:21:10,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872820299] [2023-01-27 22:21:10,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:21:10,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:21:10,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:21:10,425 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:21:10,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 22:21:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:21:10,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 93 conjunts are in the unsatisfiable core [2023-01-27 22:21:10,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:21:10,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-27 22:21:10,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-27 22:21:10,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 22:21:10,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 22:21:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:21:11,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:21:12,239 INFO L321 Elim1Store]: treesize reduction 48, result has 64.7 percent of original size [2023-01-27 22:21:12,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 388 treesize of output 313 [2023-01-27 22:21:12,252 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:21:12,254 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 230 [2023-01-27 22:21:12,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 808 treesize of output 771 [2023-01-27 22:21:12,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 479 treesize of output 453 [2023-01-27 22:21:12,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 453 treesize of output 440 [2023-01-27 22:21:12,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:21:12,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 456 treesize of output 455 [2023-01-27 22:21:12,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:21:12,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 627 treesize of output 657 [2023-01-27 22:21:12,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:21:12,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 575 treesize of output 560 [2023-01-27 22:21:12,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:21:12,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 523 treesize of output 534 [2023-01-27 22:21:12,463 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-27 22:21:12,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:21:12,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 497 treesize of output 508 [2023-01-27 22:21:12,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:21:12,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 487 treesize of output 527 [2023-01-27 22:21:12,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:21:12,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 445 treesize of output 430 [2023-01-27 22:21:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:21:49,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872820299] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:21:49,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:21:49,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-01-27 22:21:49,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287009635] [2023-01-27 22:21:49,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:21:49,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-27 22:21:49,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:21:49,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-27 22:21:49,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1569, Unknown=2, NotChecked=0, Total=1806 [2023-01-27 22:21:49,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-27 22:21:49,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 792 transitions, 15488 flow. Second operand has 43 states, 43 states have (on average 69.46511627906976) internal successors, (2987), 43 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:21:49,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:21:49,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-27 22:21:49,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:21:58,565 INFO L130 PetriNetUnfolder]: 2401/4449 cut-off events. [2023-01-27 22:21:58,566 INFO L131 PetriNetUnfolder]: For 102594/102594 co-relation queries the response was YES. [2023-01-27 22:21:58,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44932 conditions, 4449 events. 2401/4449 cut-off events. For 102594/102594 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30825 event pairs, 160 based on Foata normal form. 4/4452 useless extension candidates. Maximal degree in co-relation 44822. Up to 2534 conditions per place. [2023-01-27 22:21:58,610 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 530 selfloop transitions, 505 changer transitions 13/1048 dead transitions. [2023-01-27 22:21:58,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1048 transitions, 22244 flow [2023-01-27 22:21:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-27 22:21:58,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-27 22:21:58,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2709 transitions. [2023-01-27 22:21:58,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2701705395432333 [2023-01-27 22:21:58,613 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2709 transitions. [2023-01-27 22:21:58,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2709 transitions. [2023-01-27 22:21:58,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:21:58,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2709 transitions. [2023-01-27 22:21:58,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 73.21621621621621) internal successors, (2709), 37 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:21:58,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:21:58,619 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:21:58,619 INFO L175 Difference]: Start difference. First operand has 308 places, 792 transitions, 15488 flow. Second operand 37 states and 2709 transitions. [2023-01-27 22:21:58,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1048 transitions, 22244 flow [2023-01-27 22:21:59,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1048 transitions, 21720 flow, removed 232 selfloop flow, removed 11 redundant places. [2023-01-27 22:21:59,277 INFO L231 Difference]: Finished difference. Result has 346 places, 922 transitions, 19575 flow [2023-01-27 22:21:59,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=15149, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=19575, PETRI_PLACES=346, PETRI_TRANSITIONS=922} [2023-01-27 22:21:59,278 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 325 predicate places. [2023-01-27 22:21:59,278 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 922 transitions, 19575 flow [2023-01-27 22:21:59,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 69.46511627906976) internal successors, (2987), 43 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:21:59,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:21:59,279 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:21:59,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-01-27 22:21:59,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:21:59,484 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:21:59,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:21:59,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1480689643, now seen corresponding path program 20 times [2023-01-27 22:21:59,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:21:59,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545954559] [2023-01-27 22:21:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:21:59,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:21:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:22:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:22:00,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:22:00,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545954559] [2023-01-27 22:22:00,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545954559] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:22:00,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937009740] [2023-01-27 22:22:00,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:22:00,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:22:00,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:22:00,569 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:22:00,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 22:22:00,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:22:00,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:22:00,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 83 conjunts are in the unsatisfiable core [2023-01-27 22:22:00,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:22:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:22:01,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:22:01,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:22:01,679 INFO L350 Elim1Store]: Elim1 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 64 treesize of output 66 [2023-01-27 22:22:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:22:02,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937009740] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:22:02,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:22:02,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-01-27 22:22:02,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119007213] [2023-01-27 22:22:02,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:22:02,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-27 22:22:02,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:22:02,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-27 22:22:02,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2023-01-27 22:22:02,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-27 22:22:02,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 922 transitions, 19575 flow. Second operand has 42 states, 42 states have (on average 69.5) internal successors, (2919), 42 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:02,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:22:02,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-27 22:22:02,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:22:13,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 22:22:14,552 INFO L130 PetriNetUnfolder]: 3036/5658 cut-off events. [2023-01-27 22:22:14,552 INFO L131 PetriNetUnfolder]: For 157400/157400 co-relation queries the response was YES. [2023-01-27 22:22:14,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58403 conditions, 5658 events. 3036/5658 cut-off events. For 157400/157400 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 40721 event pairs, 138 based on Foata normal form. 170/5827 useless extension candidates. Maximal degree in co-relation 58279. Up to 1506 conditions per place. [2023-01-27 22:22:14,612 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 473 selfloop transitions, 821 changer transitions 66/1360 dead transitions. [2023-01-27 22:22:14,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1360 transitions, 29703 flow [2023-01-27 22:22:14,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-01-27 22:22:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-01-27 22:22:14,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3674 transitions. [2023-01-27 22:22:14,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27114391143911437 [2023-01-27 22:22:14,616 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3674 transitions. [2023-01-27 22:22:14,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3674 transitions. [2023-01-27 22:22:14,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:22:14,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3674 transitions. [2023-01-27 22:22:14,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 73.48) internal successors, (3674), 50 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:14,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 271.0) internal successors, (13821), 51 states have internal predecessors, (13821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:14,626 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 271.0) internal successors, (13821), 51 states have internal predecessors, (13821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:14,626 INFO L175 Difference]: Start difference. First operand has 346 places, 922 transitions, 19575 flow. Second operand 50 states and 3674 transitions. [2023-01-27 22:22:14,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1360 transitions, 29703 flow [2023-01-27 22:22:15,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1360 transitions, 28888 flow, removed 161 selfloop flow, removed 17 redundant places. [2023-01-27 22:22:15,499 INFO L231 Difference]: Finished difference. Result has 393 places, 1152 transitions, 26411 flow [2023-01-27 22:22:15,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=17715, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=26411, PETRI_PLACES=393, PETRI_TRANSITIONS=1152} [2023-01-27 22:22:15,500 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 372 predicate places. [2023-01-27 22:22:15,500 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1152 transitions, 26411 flow [2023-01-27 22:22:15,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 69.5) internal successors, (2919), 42 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:15,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:22:15,500 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:22:15,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-27 22:22:15,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-01-27 22:22:15,705 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:22:15,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:22:15,705 INFO L85 PathProgramCache]: Analyzing trace with hash 790216902, now seen corresponding path program 21 times [2023-01-27 22:22:15,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:22:15,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508412917] [2023-01-27 22:22:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:22:15,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:22:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:22:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:22:16,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:22:16,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508412917] [2023-01-27 22:22:16,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508412917] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:22:16,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647419198] [2023-01-27 22:22:16,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:22:16,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:22:16,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:22:16,150 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:22:16,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-27 22:22:16,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 22:22:16,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:22:16,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 22:22:16,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:22:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 22:22:16,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:22:16,685 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-27 22:22:16,685 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2023-01-27 22:22:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 22:22:16,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647419198] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:22:16,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:22:16,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 22 [2023-01-27 22:22:16,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001402814] [2023-01-27 22:22:16,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:22:16,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 22:22:16,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:22:16,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 22:22:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-01-27 22:22:16,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 271 [2023-01-27 22:22:16,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1152 transitions, 26411 flow. Second operand has 23 states, 23 states have (on average 91.30434782608695) internal successors, (2100), 23 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:16,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:22:16,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 271 [2023-01-27 22:22:16,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:22:19,284 INFO L130 PetriNetUnfolder]: 3235/6011 cut-off events. [2023-01-27 22:22:19,285 INFO L131 PetriNetUnfolder]: For 173531/173531 co-relation queries the response was YES. [2023-01-27 22:22:19,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67078 conditions, 6011 events. 3235/6011 cut-off events. For 173531/173531 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 43865 event pairs, 410 based on Foata normal form. 24/6034 useless extension candidates. Maximal degree in co-relation 66941. Up to 3743 conditions per place. [2023-01-27 22:22:19,355 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 933 selfloop transitions, 481 changer transitions 3/1417 dead transitions. [2023-01-27 22:22:19,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1417 transitions, 34584 flow [2023-01-27 22:22:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 22:22:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 22:22:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2551 transitions. [2023-01-27 22:22:19,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34864015306819734 [2023-01-27 22:22:19,358 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2551 transitions. [2023-01-27 22:22:19,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2551 transitions. [2023-01-27 22:22:19,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:22:19,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2551 transitions. [2023-01-27 22:22:19,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 94.48148148148148) internal successors, (2551), 27 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:19,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 271.0) internal successors, (7588), 28 states have internal predecessors, (7588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:19,363 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 271.0) internal successors, (7588), 28 states have internal predecessors, (7588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:19,363 INFO L175 Difference]: Start difference. First operand has 393 places, 1152 transitions, 26411 flow. Second operand 27 states and 2551 transitions. [2023-01-27 22:22:19,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1417 transitions, 34584 flow [2023-01-27 22:22:21,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1417 transitions, 33070 flow, removed 709 selfloop flow, removed 16 redundant places. [2023-01-27 22:22:21,081 INFO L231 Difference]: Finished difference. Result has 402 places, 1248 transitions, 28845 flow [2023-01-27 22:22:21,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=24897, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=28845, PETRI_PLACES=402, PETRI_TRANSITIONS=1248} [2023-01-27 22:22:21,082 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 381 predicate places. [2023-01-27 22:22:21,082 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 1248 transitions, 28845 flow [2023-01-27 22:22:21,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 91.30434782608695) internal successors, (2100), 23 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:21,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:22:21,083 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:22:21,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-27 22:22:21,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-27 22:22:21,283 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:22:21,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:22:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1919810157, now seen corresponding path program 22 times [2023-01-27 22:22:21,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:22:21,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820282316] [2023-01-27 22:22:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:22:21,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:22:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:22:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:22:22,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:22:22,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820282316] [2023-01-27 22:22:22,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820282316] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:22:22,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903644265] [2023-01-27 22:22:22,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:22:22,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:22:22,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:22:22,004 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:22:22,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-27 22:22:22,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:22:22,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:22:22,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 68 conjunts are in the unsatisfiable core [2023-01-27 22:22:22,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:22:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:22:22,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:22:22,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:22:22,870 INFO L350 Elim1Store]: Elim1 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 90 treesize of output 75 [2023-01-27 22:22:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:22:23,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903644265] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:22:23,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:22:23,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2023-01-27 22:22:23,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545860299] [2023-01-27 22:22:23,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:22:23,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 22:22:23,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:22:23,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 22:22:23,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 22:22:23,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-27 22:22:23,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 1248 transitions, 28845 flow. Second operand has 35 states, 35 states have (on average 76.74285714285715) internal successors, (2686), 35 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:23,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:22:23,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-27 22:22:23,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:22:26,727 INFO L130 PetriNetUnfolder]: 3259/6060 cut-off events. [2023-01-27 22:22:26,727 INFO L131 PetriNetUnfolder]: For 170885/170885 co-relation queries the response was YES. [2023-01-27 22:22:26,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66391 conditions, 6060 events. 3259/6060 cut-off events. For 170885/170885 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 43924 event pairs, 615 based on Foata normal form. 2/6061 useless extension candidates. Maximal degree in co-relation 66253. Up to 5414 conditions per place. [2023-01-27 22:22:26,795 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1069 selfloop transitions, 242 changer transitions 14/1325 dead transitions. [2023-01-27 22:22:26,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1325 transitions, 32569 flow [2023-01-27 22:22:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 22:22:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 22:22:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2311 transitions. [2023-01-27 22:22:26,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2940577681638885 [2023-01-27 22:22:26,798 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2311 transitions. [2023-01-27 22:22:26,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2311 transitions. [2023-01-27 22:22:26,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:22:26,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2311 transitions. [2023-01-27 22:22:26,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 79.6896551724138) internal successors, (2311), 29 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:26,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:26,805 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:26,805 INFO L175 Difference]: Start difference. First operand has 402 places, 1248 transitions, 28845 flow. Second operand 29 states and 2311 transitions. [2023-01-27 22:22:26,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1325 transitions, 32569 flow [2023-01-27 22:22:28,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 1325 transitions, 32216 flow, removed 98 selfloop flow, removed 10 redundant places. [2023-01-27 22:22:28,450 INFO L231 Difference]: Finished difference. Result has 429 places, 1266 transitions, 29506 flow [2023-01-27 22:22:28,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=28494, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1008, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=29506, PETRI_PLACES=429, PETRI_TRANSITIONS=1266} [2023-01-27 22:22:28,451 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 408 predicate places. [2023-01-27 22:22:28,452 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 1266 transitions, 29506 flow [2023-01-27 22:22:28,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 76.74285714285715) internal successors, (2686), 35 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:28,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:22:28,452 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:22:28,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-27 22:22:28,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:22:28,653 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:22:28,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:22:28,653 INFO L85 PathProgramCache]: Analyzing trace with hash 456240954, now seen corresponding path program 23 times [2023-01-27 22:22:28,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:22:28,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833533948] [2023-01-27 22:22:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:22:28,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:22:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:22:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:22:29,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:22:29,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833533948] [2023-01-27 22:22:29,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833533948] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:22:29,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65524702] [2023-01-27 22:22:29,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:22:29,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:22:29,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:22:29,235 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:22:29,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-27 22:22:29,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 22:22:29,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:22:29,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-27 22:22:29,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:22:29,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:22:29,561 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 21 [2023-01-27 22:22:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:22:29,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:22:29,663 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1116 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1116) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2023-01-27 22:22:29,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:22:29,684 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 40 [2023-01-27 22:22:29,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-01-27 22:22:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 22:22:29,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65524702] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:22:29,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:22:29,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 29 [2023-01-27 22:22:29,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621016839] [2023-01-27 22:22:29,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:22:29,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 22:22:29,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:22:29,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 22:22:29,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=726, Unknown=1, NotChecked=54, Total=870 [2023-01-27 22:22:29,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-01-27 22:22:29,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 1266 transitions, 29506 flow. Second operand has 30 states, 30 states have (on average 82.86666666666666) internal successors, (2486), 30 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:29,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:22:29,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-01-27 22:22:29,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:22:33,374 INFO L130 PetriNetUnfolder]: 3402/6318 cut-off events. [2023-01-27 22:22:33,374 INFO L131 PetriNetUnfolder]: For 183243/183243 co-relation queries the response was YES. [2023-01-27 22:22:33,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69691 conditions, 6318 events. 3402/6318 cut-off events. For 183243/183243 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 46662 event pairs, 101 based on Foata normal form. 44/6361 useless extension candidates. Maximal degree in co-relation 69543. Up to 1762 conditions per place. [2023-01-27 22:22:33,449 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 615 selfloop transitions, 840 changer transitions 3/1458 dead transitions. [2023-01-27 22:22:33,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1458 transitions, 35823 flow [2023-01-27 22:22:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 22:22:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 22:22:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2577 transitions. [2023-01-27 22:22:33,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3169741697416974 [2023-01-27 22:22:33,452 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2577 transitions. [2023-01-27 22:22:33,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2577 transitions. [2023-01-27 22:22:33,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:22:33,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2577 transitions. [2023-01-27 22:22:33,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 85.9) internal successors, (2577), 30 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:33,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:33,457 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:33,457 INFO L175 Difference]: Start difference. First operand has 429 places, 1266 transitions, 29506 flow. Second operand 30 states and 2577 transitions. [2023-01-27 22:22:33,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1458 transitions, 35823 flow [2023-01-27 22:22:35,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1458 transitions, 35446 flow, removed 42 selfloop flow, removed 18 redundant places. [2023-01-27 22:22:35,123 INFO L231 Difference]: Finished difference. Result has 442 places, 1328 transitions, 32987 flow [2023-01-27 22:22:35,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=29139, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=32987, PETRI_PLACES=442, PETRI_TRANSITIONS=1328} [2023-01-27 22:22:35,124 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 421 predicate places. [2023-01-27 22:22:35,124 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1328 transitions, 32987 flow [2023-01-27 22:22:35,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 82.86666666666666) internal successors, (2486), 30 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:35,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:22:35,125 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:22:35,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-27 22:22:35,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:22:35,325 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:22:35,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:22:35,325 INFO L85 PathProgramCache]: Analyzing trace with hash -873840017, now seen corresponding path program 24 times [2023-01-27 22:22:35,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:22:35,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533394357] [2023-01-27 22:22:35,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:22:35,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:22:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:22:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:22:36,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:22:36,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533394357] [2023-01-27 22:22:36,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533394357] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:22:36,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474024612] [2023-01-27 22:22:36,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:22:36,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:22:36,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:22:36,064 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:22:36,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-27 22:22:36,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 22:22:36,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:22:36,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-27 22:22:36,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:22:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:22:36,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:22:36,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:22:36,965 INFO L350 Elim1Store]: Elim1 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 101 treesize of output 78 [2023-01-27 22:22:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:22:37,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474024612] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:22:37,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:22:37,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2023-01-27 22:22:37,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225542453] [2023-01-27 22:22:37,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:22:37,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 22:22:37,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:22:37,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 22:22:37,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 22:22:37,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-27 22:22:37,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1328 transitions, 32987 flow. Second operand has 35 states, 35 states have (on average 76.74285714285715) internal successors, (2686), 35 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:37,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:22:37,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-27 22:22:37,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:22:40,845 INFO L130 PetriNetUnfolder]: 3467/6447 cut-off events. [2023-01-27 22:22:40,845 INFO L131 PetriNetUnfolder]: For 206913/206913 co-relation queries the response was YES. [2023-01-27 22:22:40,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74262 conditions, 6447 events. 3467/6447 cut-off events. For 206913/206913 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 47775 event pairs, 706 based on Foata normal form. 2/6449 useless extension candidates. Maximal degree in co-relation 74111. Up to 5972 conditions per place. [2023-01-27 22:22:40,914 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1224 selfloop transitions, 184 changer transitions 6/1414 dead transitions. [2023-01-27 22:22:40,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1414 transitions, 37576 flow [2023-01-27 22:22:40,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 22:22:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 22:22:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1902 transitions. [2023-01-27 22:22:40,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2924354243542435 [2023-01-27 22:22:40,916 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1902 transitions. [2023-01-27 22:22:40,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1902 transitions. [2023-01-27 22:22:40,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:22:40,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1902 transitions. [2023-01-27 22:22:40,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 79.25) internal successors, (1902), 24 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:40,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:40,921 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:40,921 INFO L175 Difference]: Start difference. First operand has 442 places, 1328 transitions, 32987 flow. Second operand 24 states and 1902 transitions. [2023-01-27 22:22:40,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1414 transitions, 37576 flow [2023-01-27 22:22:42,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 1414 transitions, 36831 flow, removed 162 selfloop flow, removed 17 redundant places. [2023-01-27 22:22:42,765 INFO L231 Difference]: Finished difference. Result has 457 places, 1363 transitions, 33968 flow [2023-01-27 22:22:42,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=32248, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=33968, PETRI_PLACES=457, PETRI_TRANSITIONS=1363} [2023-01-27 22:22:42,766 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 436 predicate places. [2023-01-27 22:22:42,766 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1363 transitions, 33968 flow [2023-01-27 22:22:42,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 76.74285714285715) internal successors, (2686), 35 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:42,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:22:42,767 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:22:42,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-27 22:22:42,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:22:42,967 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:22:42,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:22:42,968 INFO L85 PathProgramCache]: Analyzing trace with hash -146005971, now seen corresponding path program 25 times [2023-01-27 22:22:42,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:22:42,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357811662] [2023-01-27 22:22:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:22:42,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:22:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:22:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:22:43,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:22:43,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357811662] [2023-01-27 22:22:43,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357811662] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:22:43,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617967426] [2023-01-27 22:22:43,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:22:43,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:22:43,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:22:43,645 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:22:43,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-27 22:22:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:22:43,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-27 22:22:43,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:22:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:22:44,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:22:44,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:22:44,565 INFO L350 Elim1Store]: Elim1 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 64 treesize of output 66 [2023-01-27 22:22:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:22:44,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617967426] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:22:44,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:22:44,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 35 [2023-01-27 22:22:44,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618371996] [2023-01-27 22:22:44,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:22:44,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-27 22:22:44,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:22:44,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-27 22:22:44,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2023-01-27 22:22:44,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-27 22:22:44,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1363 transitions, 33968 flow. Second operand has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:44,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:22:44,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-27 22:22:44,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:22:51,259 INFO L130 PetriNetUnfolder]: 3489/6495 cut-off events. [2023-01-27 22:22:51,260 INFO L131 PetriNetUnfolder]: For 205869/205869 co-relation queries the response was YES. [2023-01-27 22:22:51,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74541 conditions, 6495 events. 3489/6495 cut-off events. For 205869/205869 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 47882 event pairs, 276 based on Foata normal form. 2/6496 useless extension candidates. Maximal degree in co-relation 74383. Up to 2208 conditions per place. [2023-01-27 22:22:51,341 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 768 selfloop transitions, 650 changer transitions 30/1448 dead transitions. [2023-01-27 22:22:51,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 1448 transitions, 38125 flow [2023-01-27 22:22:51,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 22:22:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 22:22:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2304 transitions. [2023-01-27 22:22:51,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2931670696017305 [2023-01-27 22:22:51,344 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2304 transitions. [2023-01-27 22:22:51,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2304 transitions. [2023-01-27 22:22:51,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:22:51,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2304 transitions. [2023-01-27 22:22:51,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 79.44827586206897) internal successors, (2304), 29 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:51,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:51,350 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:51,350 INFO L175 Difference]: Start difference. First operand has 457 places, 1363 transitions, 33968 flow. Second operand 29 states and 2304 transitions. [2023-01-27 22:22:51,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 1448 transitions, 38125 flow [2023-01-27 22:22:53,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 1448 transitions, 37587 flow, removed 105 selfloop flow, removed 15 redundant places. [2023-01-27 22:22:53,513 INFO L231 Difference]: Finished difference. Result has 474 places, 1369 transitions, 34883 flow [2023-01-27 22:22:53,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=33436, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=644, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=34883, PETRI_PLACES=474, PETRI_TRANSITIONS=1369} [2023-01-27 22:22:53,514 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 453 predicate places. [2023-01-27 22:22:53,514 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 1369 transitions, 34883 flow [2023-01-27 22:22:53,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:53,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:22:53,515 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:22:53,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-27 22:22:53,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-27 22:22:53,720 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:22:53,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:22:53,720 INFO L85 PathProgramCache]: Analyzing trace with hash 293114543, now seen corresponding path program 26 times [2023-01-27 22:22:53,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:22:53,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956972026] [2023-01-27 22:22:53,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:22:53,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:22:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:22:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:22:54,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:22:54,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956972026] [2023-01-27 22:22:54,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956972026] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:22:54,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564432746] [2023-01-27 22:22:54,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:22:54,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:22:54,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:22:54,450 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:22:54,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-27 22:22:54,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:22:54,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:22:54,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-27 22:22:54,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:22:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:22:55,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:22:55,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:22:55,408 INFO L350 Elim1Store]: Elim1 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 64 treesize of output 66 [2023-01-27 22:22:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:22:55,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564432746] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:22:55,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:22:55,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 35 [2023-01-27 22:22:55,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021948410] [2023-01-27 22:22:55,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:22:55,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-27 22:22:55,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:22:55,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-27 22:22:55,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1221, Unknown=0, NotChecked=0, Total=1332 [2023-01-27 22:22:55,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-27 22:22:55,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 1369 transitions, 34883 flow. Second operand has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:55,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:22:55,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-27 22:22:55,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:23:01,323 INFO L130 PetriNetUnfolder]: 3480/6478 cut-off events. [2023-01-27 22:23:01,323 INFO L131 PetriNetUnfolder]: For 220843/220843 co-relation queries the response was YES. [2023-01-27 22:23:01,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75680 conditions, 6478 events. 3480/6478 cut-off events. For 220843/220843 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 48165 event pairs, 272 based on Foata normal form. 2/6480 useless extension candidates. Maximal degree in co-relation 75518. Up to 2206 conditions per place. [2023-01-27 22:23:01,397 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 767 selfloop transitions, 657 changer transitions 20/1444 dead transitions. [2023-01-27 22:23:01,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 1444 transitions, 38838 flow [2023-01-27 22:23:01,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 22:23:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 22:23:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2454 transitions. [2023-01-27 22:23:01,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29210808237114627 [2023-01-27 22:23:01,399 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2454 transitions. [2023-01-27 22:23:01,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2454 transitions. [2023-01-27 22:23:01,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:23:01,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2454 transitions. [2023-01-27 22:23:01,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 79.16129032258064) internal successors, (2454), 31 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:01,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:01,404 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:01,405 INFO L175 Difference]: Start difference. First operand has 474 places, 1369 transitions, 34883 flow. Second operand 31 states and 2454 transitions. [2023-01-27 22:23:01,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 1444 transitions, 38838 flow [2023-01-27 22:23:03,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 1444 transitions, 38366 flow, removed 20 selfloop flow, removed 18 redundant places. [2023-01-27 22:23:03,291 INFO L231 Difference]: Finished difference. Result has 484 places, 1371 transitions, 35795 flow [2023-01-27 22:23:03,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=34426, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=655, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=35795, PETRI_PLACES=484, PETRI_TRANSITIONS=1371} [2023-01-27 22:23:03,292 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 463 predicate places. [2023-01-27 22:23:03,292 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 1371 transitions, 35795 flow [2023-01-27 22:23:03,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:03,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:23:03,293 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:23:03,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-27 22:23:03,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-27 22:23:03,493 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:23:03,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:23:03,494 INFO L85 PathProgramCache]: Analyzing trace with hash 466362235, now seen corresponding path program 27 times [2023-01-27 22:23:03,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:23:03,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567490580] [2023-01-27 22:23:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:23:03,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:23:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:23:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:23:04,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:23:04,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567490580] [2023-01-27 22:23:04,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567490580] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:23:04,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684292470] [2023-01-27 22:23:04,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:23:04,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:23:04,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:23:04,208 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:23:04,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-27 22:23:04,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 22:23:04,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:23:04,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 99 conjunts are in the unsatisfiable core [2023-01-27 22:23:04,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:23:04,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 22:23:04,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 22:23:04,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 22:23:04,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 22:23:04,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 22:23:04,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:23:04,921 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 7 [2023-01-27 22:23:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:23:05,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:23:06,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:23:06,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 128 [2023-01-27 22:23:06,748 INFO L321 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-01-27 22:23:06,748 INFO L350 Elim1Store]: Elim1 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 325 treesize of output 305 [2023-01-27 22:23:06,771 INFO L321 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-01-27 22:23:06,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 282 treesize of output 236 [2023-01-27 22:23:06,794 INFO L321 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-01-27 22:23:06,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 157 [2023-01-27 22:23:07,344 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-01-27 22:23:07,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 1 [2023-01-27 22:23:07,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:23:07,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 94 [2023-01-27 22:23:07,363 INFO L321 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2023-01-27 22:23:07,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 470 treesize of output 422 [2023-01-27 22:23:07,375 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:23:07,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:23:07,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2023-01-27 22:23:07,390 INFO L321 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2023-01-27 22:23:07,390 INFO L350 Elim1Store]: Elim1 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 153 treesize of output 117 [2023-01-27 22:23:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:23:07,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684292470] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:23:07,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:23:07,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-01-27 22:23:07,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10597627] [2023-01-27 22:23:07,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:23:07,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-27 22:23:07,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:23:07,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-27 22:23:07,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1589, Unknown=13, NotChecked=0, Total=1806 [2023-01-27 22:23:07,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-27 22:23:07,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 1371 transitions, 35795 flow. Second operand has 43 states, 43 states have (on average 69.46511627906976) internal successors, (2987), 43 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:07,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:23:07,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-27 22:23:07,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:23:13,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 22:23:15,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 22:23:15,324 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse21 (* c_~q_front~0 4)) (.cse22 (* 4 c_~q_back~0))) (let ((.cse10 (forall ((~C~0 Int)) (let ((.cse23 (* 3 ~C~0))) (= (mod (+ c_~x~0 .cse23) 4294967296) (mod (+ c_~y~0 .cse23) 4294967296))))) (.cse3 (+ .cse22 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (+ .cse21 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ .cse22 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse6 (+ .cse21 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse0 (< (+ c_~q_front~0 1) 0)) (.cse13 (< c_~n~0 (+ c_~q_front~0 3))) (.cse14 (< c_~q_back~0 0)) (.cse15 (<= c_~n~0 c_~q_back~0))) (and (or .cse0 (let ((.cse7 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse8 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_1273 Int) (v_ArrVal_1276 (Array Int Int)) (v_ArrVal_1275 (Array Int Int))) (let ((.cse1 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse7 .cse8 v_ArrVal_1273)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1275) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1276) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse4 (select .cse1 .cse6))) (or (not (= (select .cse1 .cse2) 1)) (not (= (select .cse1 .cse3) 1)) (= .cse4 0) (< (+ .cse4 (select .cse1 .cse5)) 3))))) (or (forall ((v_ArrVal_1273 Int) (v_ArrVal_1276 (Array Int Int)) (v_ArrVal_1275 (Array Int Int))) (let ((.cse9 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse7 .cse8 v_ArrVal_1273)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1275) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1276) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse9 .cse2) 1)) (not (= (select .cse9 .cse3) 1)) (= (select .cse9 .cse6) 0)))) .cse10) (forall ((v_ArrVal_1273 Int) (v_ArrVal_1276 (Array Int Int)) (v_ArrVal_1275 (Array Int Int))) (let ((.cse11 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse7 .cse8 v_ArrVal_1273)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1275) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1276) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse12 (select .cse11 .cse6))) (or (not (= (select .cse11 .cse2) 1)) (< 1 (+ .cse12 (select .cse11 .cse5))) (not (= (select .cse11 .cse3) 1)) (= .cse12 0))))))) .cse13 .cse14 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse15) (or (and (or .cse10 (forall ((v_ArrVal_1276 (Array Int Int)) (v_ArrVal_1275 (Array Int Int))) (let ((.cse16 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1275) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1276) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse16 .cse3) 1)) (not (= (select .cse16 .cse2) 1)) (= (select .cse16 .cse6) 0))))) (forall ((v_ArrVal_1276 (Array Int Int)) (v_ArrVal_1275 (Array Int Int))) (let ((.cse17 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1275) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1276) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse18 (select .cse17 .cse6))) (or (not (= (select .cse17 .cse3) 1)) (not (= (select .cse17 .cse2) 1)) (< 1 (+ .cse18 (select .cse17 .cse5))) (= .cse18 0))))) (forall ((v_ArrVal_1276 (Array Int Int)) (v_ArrVal_1275 (Array Int Int))) (let ((.cse19 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1275) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1276) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse20 (select .cse19 .cse6))) (or (not (= (select .cse19 .cse3) 1)) (< (+ .cse20 (select .cse19 .cse5)) 3) (not (= (select .cse19 .cse2) 1)) (= .cse20 0)))))) .cse0 .cse13 (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse14 .cse15)))) is different from false [2023-01-27 22:23:17,959 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse27 (* c_~q_front~0 4))) (let ((.cse30 (select |c_#memory_int| c_~q~0.base)) (.cse6 (+ .cse27 c_~q~0.offset 4)) (.cse28 (* 4 c_~q_back~0))) (let ((.cse2 (+ c_~q~0.offset .cse28 4)) (.cse4 (+ .cse27 c_~q~0.offset)) (.cse31 (select .cse30 .cse6)) (.cse5 (+ c_~q~0.offset .cse28))) (let ((.cse14 (not (= (select .cse30 .cse5) 1))) (.cse16 (+ (select .cse30 .cse4) .cse31)) (.cse15 (= .cse31 0)) (.cse17 (not (= (select .cse30 .cse2) 1))) (.cse7 (forall ((~C~0 Int)) (let ((.cse29 (* 3 ~C~0))) (= (mod (+ c_~x~0 .cse29) 4294967296) (mod (+ c_~y~0 .cse29) 4294967296))))) (.cse0 (< (+ c_~q_front~0 1) 0)) (.cse11 (< c_~n~0 (+ c_~q_front~0 3))) (.cse12 (< c_~q_back~0 0)) (.cse13 (<= c_~n~0 c_~q_back~0))) (and (or .cse0 (and (forall ((v_ArrVal_1276 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1276) c_~q~0.base))) (let ((.cse3 (select .cse1 .cse6))) (or (not (= (select .cse1 .cse2) 1)) (< (+ .cse3 (select .cse1 .cse4)) 3) (not (= (select .cse1 .cse5) 1)) (= .cse3 0))))) (or .cse7 (forall ((v_ArrVal_1276 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1276) c_~q~0.base))) (or (not (= (select .cse8 .cse2) 1)) (not (= (select .cse8 .cse5) 1)) (= (select .cse8 .cse6) 0))))) (forall ((v_ArrVal_1276 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1276) c_~q~0.base))) (let ((.cse10 (select .cse9 .cse6))) (or (not (= (select .cse9 .cse2) 1)) (< 1 (+ .cse10 (select .cse9 .cse4))) (not (= (select .cse9 .cse5) 1)) (= .cse10 0)))))) .cse11 .cse12 .cse13) (or .cse0 .cse14 .cse11 .cse15 (and .cse7 (< .cse16 3) (< 1 .cse16)) .cse17 .cse12 .cse13) (or .cse0 .cse14 (and (< .cse16 (+ 3 |c_thread1Thread1of1ForFork0_~i~0#1|)) .cse7 (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) .cse16)) .cse11 .cse15 .cse17 .cse12 .cse13) (or (let ((.cse19 (+ .cse28 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse24 (+ .cse27 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse20 (+ .cse28 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse21 (+ .cse27 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (or .cse7 (forall ((v_ArrVal_1276 (Array Int Int)) (v_ArrVal_1275 (Array Int Int))) (let ((.cse18 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1275) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1276) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse18 .cse19) 1)) (not (= (select .cse18 .cse20) 1)) (= (select .cse18 .cse21) 0))))) (forall ((v_ArrVal_1276 (Array Int Int)) (v_ArrVal_1275 (Array Int Int))) (let ((.cse22 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1275) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1276) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse23 (select .cse22 .cse21))) (or (not (= (select .cse22 .cse19) 1)) (not (= (select .cse22 .cse20) 1)) (< 1 (+ .cse23 (select .cse22 .cse24))) (= .cse23 0))))) (forall ((v_ArrVal_1276 (Array Int Int)) (v_ArrVal_1275 (Array Int Int))) (let ((.cse25 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1275) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1276) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse26 (select .cse25 .cse21))) (or (not (= (select .cse25 .cse19) 1)) (< (+ .cse26 (select .cse25 .cse24)) 3) (not (= (select .cse25 .cse20) 1)) (= .cse26 0))))))) .cse0 .cse11 (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse12 .cse13)))))) is different from false [2023-01-27 22:23:26,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 22:23:52,020 INFO L130 PetriNetUnfolder]: 4086/7746 cut-off events. [2023-01-27 22:23:52,021 INFO L131 PetriNetUnfolder]: For 300685/300685 co-relation queries the response was YES. [2023-01-27 22:23:52,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91137 conditions, 7746 events. 4086/7746 cut-off events. For 300685/300685 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 59694 event pairs, 271 based on Foata normal form. 321/8067 useless extension candidates. Maximal degree in co-relation 90975. Up to 3894 conditions per place. [2023-01-27 22:23:52,129 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1013 selfloop transitions, 756 changer transitions 130/1899 dead transitions. [2023-01-27 22:23:52,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 1899 transitions, 49357 flow [2023-01-27 22:23:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-01-27 22:23:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-01-27 22:23:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 6263 transitions. [2023-01-27 22:23:52,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2687290826396636 [2023-01-27 22:23:52,133 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 6263 transitions. [2023-01-27 22:23:52,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 6263 transitions. [2023-01-27 22:23:52,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:23:52,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 6263 transitions. [2023-01-27 22:23:52,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 72.82558139534883) internal successors, (6263), 86 states have internal predecessors, (6263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:52,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 271.0) internal successors, (23577), 87 states have internal predecessors, (23577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:52,151 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 271.0) internal successors, (23577), 87 states have internal predecessors, (23577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:52,151 INFO L175 Difference]: Start difference. First operand has 484 places, 1371 transitions, 35795 flow. Second operand 86 states and 6263 transitions. [2023-01-27 22:23:52,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 1899 transitions, 49357 flow [2023-01-27 22:23:54,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 1899 transitions, 48336 flow, removed 27 selfloop flow, removed 24 redundant places. [2023-01-27 22:23:54,699 INFO L231 Difference]: Finished difference. Result has 578 places, 1582 transitions, 42704 flow [2023-01-27 22:23:54,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=32603, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=42704, PETRI_PLACES=578, PETRI_TRANSITIONS=1582} [2023-01-27 22:23:54,700 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 557 predicate places. [2023-01-27 22:23:54,700 INFO L495 AbstractCegarLoop]: Abstraction has has 578 places, 1582 transitions, 42704 flow [2023-01-27 22:23:54,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 69.46511627906976) internal successors, (2987), 43 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:54,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:23:54,700 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:23:54,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-27 22:23:54,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-27 22:23:54,901 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:23:54,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:23:54,901 INFO L85 PathProgramCache]: Analyzing trace with hash 27241721, now seen corresponding path program 28 times [2023-01-27 22:23:54,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:23:54,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238562219] [2023-01-27 22:23:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:23:54,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:23:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:23:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:23:55,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:23:55,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238562219] [2023-01-27 22:23:55,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238562219] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:23:55,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761423034] [2023-01-27 22:23:55,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:23:55,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:23:55,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:23:55,557 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:23:55,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-27 22:23:55,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:23:55,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:23:55,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 83 conjunts are in the unsatisfiable core [2023-01-27 22:23:55,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:23:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:23:56,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:23:56,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:23:56,742 INFO L350 Elim1Store]: Elim1 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 64 treesize of output 66 [2023-01-27 22:23:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:23:57,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761423034] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:23:57,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:23:57,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-01-27 22:23:57,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021687] [2023-01-27 22:23:57,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:23:57,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-27 22:23:57,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:23:57,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-27 22:23:57,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2023-01-27 22:23:57,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-27 22:23:57,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 1582 transitions, 42704 flow. Second operand has 40 states, 40 states have (on average 76.55) internal successors, (3062), 40 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:57,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:23:57,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-27 22:23:57,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:24:06,553 INFO L130 PetriNetUnfolder]: 3972/7512 cut-off events. [2023-01-27 22:24:06,554 INFO L131 PetriNetUnfolder]: For 263009/263009 co-relation queries the response was YES. [2023-01-27 22:24:06,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92750 conditions, 7512 events. 3972/7512 cut-off events. For 263009/263009 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 57891 event pairs, 187 based on Foata normal form. 3/7514 useless extension candidates. Maximal degree in co-relation 92554. Up to 2694 conditions per place. [2023-01-27 22:24:06,666 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 869 selfloop transitions, 842 changer transitions 25/1736 dead transitions. [2023-01-27 22:24:06,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 1736 transitions, 49016 flow [2023-01-27 22:24:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-27 22:24:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-27 22:24:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3259 transitions. [2023-01-27 22:24:06,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29331293312933127 [2023-01-27 22:24:06,671 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3259 transitions. [2023-01-27 22:24:06,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3259 transitions. [2023-01-27 22:24:06,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:24:06,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3259 transitions. [2023-01-27 22:24:06,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 79.48780487804878) internal successors, (3259), 41 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:24:06,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:24:06,677 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:24:06,677 INFO L175 Difference]: Start difference. First operand has 578 places, 1582 transitions, 42704 flow. Second operand 41 states and 3259 transitions. [2023-01-27 22:24:06,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 1736 transitions, 49016 flow [2023-01-27 22:24:10,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 1736 transitions, 46773 flow, removed 1038 selfloop flow, removed 28 redundant places. [2023-01-27 22:24:10,240 INFO L231 Difference]: Finished difference. Result has 589 places, 1642 transitions, 44646 flow [2023-01-27 22:24:10,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=40584, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=780, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=758, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=44646, PETRI_PLACES=589, PETRI_TRANSITIONS=1642} [2023-01-27 22:24:10,241 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 568 predicate places. [2023-01-27 22:24:10,241 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 1642 transitions, 44646 flow [2023-01-27 22:24:10,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 76.55) internal successors, (3062), 40 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:24:10,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:24:10,242 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:24:10,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-27 22:24:10,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-27 22:24:10,447 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:24:10,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:24:10,447 INFO L85 PathProgramCache]: Analyzing trace with hash 966037547, now seen corresponding path program 29 times [2023-01-27 22:24:10,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:24:10,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129557274] [2023-01-27 22:24:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:24:10,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:24:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:24:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:24:11,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:24:11,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129557274] [2023-01-27 22:24:11,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129557274] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:24:11,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964850017] [2023-01-27 22:24:11,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:24:11,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:24:11,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:24:11,253 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:24:11,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-27 22:24:11,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 22:24:11,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:24:11,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 95 conjunts are in the unsatisfiable core [2023-01-27 22:24:11,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:24:11,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-27 22:24:11,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-27 22:24:11,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-27 22:24:11,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 22:24:11,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 22:24:12,017 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-01-27 22:24:12,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2023-01-27 22:24:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:24:12,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:24:30,087 WARN L222 SmtUtils]: Spent 12.05s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 22:24:30,305 INFO L321 Elim1Store]: treesize reduction 156, result has 49.2 percent of original size [2023-01-27 22:24:30,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 515 treesize of output 433 [2023-01-27 22:24:30,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 584 treesize of output 563 [2023-01-27 22:24:30,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:24:30,365 INFO L350 Elim1Store]: Elim1 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 359 treesize of output 356 [2023-01-27 22:24:30,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:24:30,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 382 treesize of output 406 [2023-01-27 22:24:30,433 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:24:30,433 INFO L350 Elim1Store]: Elim1 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 335 treesize of output 320 [2023-01-27 22:24:30,458 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:24:30,464 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 358 [2023-01-27 22:24:30,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:24:30,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1252 treesize of output 1290 [2023-01-27 22:24:30,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:24:30,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 628 treesize of output 648 [2023-01-27 22:24:30,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:24:30,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 603 treesize of output 598 [2023-01-27 22:24:30,775 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-27 22:24:30,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:24:30,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 588 treesize of output 671 [2023-01-27 22:24:30,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:24:30,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 528 treesize of output 548 [2023-01-27 22:24:31,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:24:31,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 503 treesize of output 498 Received shutdown request... [2023-01-27 22:33:14,406 WARN L238 SmtUtils]: Removed 2 from assertion stack [2023-01-27 22:33:14,408 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 22:33:14,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-27 22:33:14,421 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 22:33:14,421 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 22:33:14,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-27 22:33:14,609 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 20ms.. [2023-01-27 22:33:14,610 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 22:33:14,610 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 22:33:14,610 INFO L445 BasicCegarLoop]: Path program histogram: [29, 5, 4, 1, 1] [2023-01-27 22:33:14,612 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 22:33:14,612 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 22:33:14,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 10:33:14 BasicIcfg [2023-01-27 22:33:14,614 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 22:33:14,614 INFO L158 Benchmark]: Toolchain (without parser) took 819823.75ms. Allocated memory was 331.4MB in the beginning and 3.0GB in the end (delta: 2.7GB). Free memory was 290.4MB in the beginning and 624.4MB in the end (delta: -334.0MB). Peak memory consumption was 2.7GB. Max. memory is 16.0GB. [2023-01-27 22:33:14,614 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 255.9MB. Free memory is still 213.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 22:33:14,614 INFO L158 Benchmark]: CACSL2BoogieTranslator took 186.87ms. Allocated memory is still 331.4MB. Free memory was 290.0MB in the beginning and 278.5MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 22:33:14,614 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.36ms. Allocated memory is still 331.4MB. Free memory was 278.5MB in the beginning and 276.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 22:33:14,614 INFO L158 Benchmark]: Boogie Preprocessor took 27.61ms. Allocated memory is still 331.4MB. Free memory was 276.4MB in the beginning and 275.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 22:33:14,615 INFO L158 Benchmark]: RCFGBuilder took 499.89ms. Allocated memory is still 331.4MB. Free memory was 275.0MB in the beginning and 250.2MB in the end (delta: 24.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-01-27 22:33:14,615 INFO L158 Benchmark]: TraceAbstraction took 819074.19ms. Allocated memory was 331.4MB in the beginning and 3.0GB in the end (delta: 2.7GB). Free memory was 249.5MB in the beginning and 624.4MB in the end (delta: -374.9MB). Peak memory consumption was 2.7GB. Max. memory is 16.0GB. [2023-01-27 22:33:14,615 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 255.9MB. Free memory is still 213.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 186.87ms. Allocated memory is still 331.4MB. Free memory was 290.0MB in the beginning and 278.5MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.36ms. Allocated memory is still 331.4MB. Free memory was 278.5MB in the beginning and 276.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 27.61ms. Allocated memory is still 331.4MB. Free memory was 276.4MB in the beginning and 275.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 499.89ms. Allocated memory is still 331.4MB. Free memory was 275.0MB in the beginning and 250.2MB in the end (delta: 24.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 819074.19ms. Allocated memory was 331.4MB in the beginning and 3.0GB in the end (delta: 2.7GB). Free memory was 249.5MB in the beginning and 624.4MB in the end (delta: -374.9MB). Peak memory consumption was 2.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 124 PlacesBefore, 21 PlacesAfterwards, 128 TransitionsBefore, 17 TransitionsAfterwards, 690 CoEnabledTransitionPairs, 8 FixpointIterations, 80 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 16 TrivialYvCompositions, 7 ConcurrentYvCompositions, 8 ChoiceCompositions, 133 TotalNumberOfCompositions, 839 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 763, independent: 739, independent conditional: 0, independent unconditional: 739, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 407, independent: 397, independent conditional: 0, independent unconditional: 397, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 763, independent: 342, independent conditional: 0, independent unconditional: 342, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 407, unknown conditional: 0, unknown unconditional: 407] , Statistics on independence cache: Total cache size (in pairs): 22, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 20ms.. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 20ms.. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 20ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 152 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 819.0s, OverallIterations: 40, TraceHistogramMax: 4, PathProgramHistogramMax: 29, EmptinessCheckTime: 0.0s, AutomataDifference: 172.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: 143 mSolverCounterUnknown, 4682 SdHoareTripleChecker+Valid, 39.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4682 mSDsluCounter, 423 SdHoareTripleChecker+Invalid, 36.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1612 IncrementalHoareTripleChecker+Unchecked, 389 mSDsCounter, 1390 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32048 IncrementalHoareTripleChecker+Invalid, 35193 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1390 mSolverCounterUnsat, 34 mSDtfsCounter, 32048 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2176 GetRequests, 630 SyntacticMatches, 14 SemanticMatches, 1532 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 17411 ImplicationChecksByTransitivity, 102.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44646occurred in iteration=39, InterpolantAutomatonStates: 942, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 86.6s InterpolantComputationTime, 1356 NumberOfCodeBlocks, 1353 NumberOfCodeBlocksAsserted, 105 NumberOfCheckSat, 1884 ConstructedInterpolants, 214 QuantifiedInterpolants, 45222 SizeOfPredicates, 603 NumberOfNonLiveVariables, 7938 ConjunctsInSsa, 1768 ConjunctsInUnsatCore, 105 InterpolantComputations, 7 PerfectInterpolantSequences, 168/813 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown