/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-bad-ring.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 21:18:22,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 21:18:22,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 21:18:22,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 21:18:22,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 21:18:22,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 21:18:22,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 21:18:22,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 21:18:22,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 21:18:22,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 21:18:22,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 21:18:22,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 21:18:22,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 21:18:22,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 21:18:22,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 21:18:22,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 21:18:22,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 21:18:22,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 21:18:22,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 21:18:22,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 21:18:22,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 21:18:22,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 21:18:22,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 21:18:22,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 21:18:22,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 21:18:22,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 21:18:22,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 21:18:22,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 21:18:22,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 21:18:22,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 21:18:22,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 21:18:22,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 21:18:22,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 21:18:22,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 21:18:22,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 21:18:22,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 21:18:22,907 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 21:18:22,929 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 21:18:22,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 21:18:22,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 21:18:22,930 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 21:18:22,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 21:18:22,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 21:18:22,931 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 21:18:22,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 21:18:22,931 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 21:18:22,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 21:18:22,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 21:18:22,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 21:18:22,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 21:18:22,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 21:18:22,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 21:18:22,932 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 21:18:22,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 21:18:22,932 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 21:18:22,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 21:18:22,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 21:18:22,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 21:18:22,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 21:18:22,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 21:18:22,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:18:22,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 21:18:22,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 21:18:22,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 21:18:22,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 21:18:22,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 21:18:22,934 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 21:18:22,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 21:18:22,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 21:18:23,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 21:18:23,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 21:18:23,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 21:18:23,129 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 21:18:23,130 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 21:18:23,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-01-27 21:18:24,023 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 21:18:24,156 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 21:18:24,156 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-01-27 21:18:24,162 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2b39f73f/2dbf59c4d4344d6aaf129055225c7f2f/FLAGac88a6c52 [2023-01-27 21:18:24,177 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2b39f73f/2dbf59c4d4344d6aaf129055225c7f2f [2023-01-27 21:18:24,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 21:18:24,180 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 21:18:24,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 21:18:24,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 21:18:24,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 21:18:24,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:18:24" (1/1) ... [2023-01-27 21:18:24,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5318124b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:24, skipping insertion in model container [2023-01-27 21:18:24,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:18:24" (1/1) ... [2023-01-27 21:18:24,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 21:18:24,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 21:18:24,346 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-bad-ring.wvr.c[3947,3960] [2023-01-27 21:18:24,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:18:24,359 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 21:18:24,385 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-bad-ring.wvr.c[3947,3960] [2023-01-27 21:18:24,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:18:24,393 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:18:24,393 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:18:24,397 INFO L208 MainTranslator]: Completed translation [2023-01-27 21:18:24,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:24 WrapperNode [2023-01-27 21:18:24,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 21:18:24,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 21:18:24,398 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 21:18:24,398 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 21:18:24,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:24" (1/1) ... [2023-01-27 21:18:24,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:24" (1/1) ... [2023-01-27 21:18:24,426 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 325 [2023-01-27 21:18:24,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 21:18:24,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 21:18:24,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 21:18:24,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 21:18:24,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:24" (1/1) ... [2023-01-27 21:18:24,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:24" (1/1) ... [2023-01-27 21:18:24,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:24" (1/1) ... [2023-01-27 21:18:24,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:24" (1/1) ... [2023-01-27 21:18:24,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:24" (1/1) ... [2023-01-27 21:18:24,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:24" (1/1) ... [2023-01-27 21:18:24,446 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:24" (1/1) ... [2023-01-27 21:18:24,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:24" (1/1) ... [2023-01-27 21:18:24,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 21:18:24,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 21:18:24,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 21:18:24,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 21:18:24,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:24" (1/1) ... [2023-01-27 21:18:24,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:18:24,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:24,482 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 21:18:24,483 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 21:18:24,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 21:18:24,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 21:18:24,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 21:18:24,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 21:18:24,503 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 21:18:24,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 21:18:24,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 21:18:24,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 21:18:24,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-27 21:18:24,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-27 21:18:24,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 21:18:24,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 21:18:24,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 21:18:24,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 21:18:24,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 21:18:24,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 21:18:24,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 21:18:24,505 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 21:18:24,594 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 21:18:24,595 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 21:18:24,890 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 21:18:24,997 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 21:18:24,998 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-01-27 21:18:25,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:18:25 BoogieIcfgContainer [2023-01-27 21:18:25,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 21:18:25,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 21:18:25,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 21:18:25,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 21:18:25,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 09:18:24" (1/3) ... [2023-01-27 21:18:25,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca9a7cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:18:25, skipping insertion in model container [2023-01-27 21:18:25,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:24" (2/3) ... [2023-01-27 21:18:25,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca9a7cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:18:25, skipping insertion in model container [2023-01-27 21:18:25,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:18:25" (3/3) ... [2023-01-27 21:18:25,011 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2023-01-27 21:18:25,022 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 21:18:25,022 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 21:18:25,022 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 21:18:25,095 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 21:18:25,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 255 transitions, 534 flow [2023-01-27 21:18:25,197 INFO L130 PetriNetUnfolder]: 22/252 cut-off events. [2023-01-27 21:18:25,197 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 21:18:25,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 252 events. 22/252 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 158 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 214. Up to 3 conditions per place. [2023-01-27 21:18:25,203 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 255 transitions, 534 flow [2023-01-27 21:18:25,209 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 242 transitions, 502 flow [2023-01-27 21:18:25,211 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 21:18:25,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 242 transitions, 502 flow [2023-01-27 21:18:25,223 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 242 transitions, 502 flow [2023-01-27 21:18:25,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 242 transitions, 502 flow [2023-01-27 21:18:25,258 INFO L130 PetriNetUnfolder]: 22/242 cut-off events. [2023-01-27 21:18:25,259 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 21:18:25,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 242 events. 22/242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 157 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 214. Up to 3 conditions per place. [2023-01-27 21:18:25,263 INFO L119 LiptonReduction]: Number of co-enabled transitions 1962 [2023-01-27 21:18:32,239 INFO L134 LiptonReduction]: Checked pairs total: 3161 [2023-01-27 21:18:32,239 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-01-27 21:18:32,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 21:18:32,252 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;@358c531a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 21:18:32,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 21:18:32,257 INFO L130 PetriNetUnfolder]: 8/32 cut-off events. [2023-01-27 21:18:32,257 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 21:18:32,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:32,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:32,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:18:32,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:32,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1137441367, now seen corresponding path program 1 times [2023-01-27 21:18:32,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:32,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399490396] [2023-01-27 21:18:32,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:32,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:32,489 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 21:18:32,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:32,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399490396] [2023-01-27 21:18:32,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399490396] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:32,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:32,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 21:18:32,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769794193] [2023-01-27 21:18:32,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:32,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 21:18:32,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:32,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 21:18:32,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 21:18:32,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 507 [2023-01-27 21:18:32,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 84 flow. Second operand has 2 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 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 21:18:32,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:32,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 507 [2023-01-27 21:18:32,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:32,613 INFO L130 PetriNetUnfolder]: 468/682 cut-off events. [2023-01-27 21:18:32,613 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-01-27 21:18:32,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1432 conditions, 682 events. 468/682 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2010 event pairs, 333 based on Foata normal form. 0/547 useless extension candidates. Maximal degree in co-relation 1160. Up to 683 conditions per place. [2023-01-27 21:18:32,617 INFO L137 encePairwiseOnDemand]: 505/507 looper letters, 31 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2023-01-27 21:18:32,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 142 flow [2023-01-27 21:18:32,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 21:18:32,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 21:18:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 483 transitions. [2023-01-27 21:18:32,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47633136094674555 [2023-01-27 21:18:32,627 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 483 transitions. [2023-01-27 21:18:32,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 483 transitions. [2023-01-27 21:18:32,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:32,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 483 transitions. [2023-01-27 21:18:32,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 241.5) internal successors, (483), 2 states have internal predecessors, (483), 0 states have call successors, (0), 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 21:18:32,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 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 21:18:32,638 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 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 21:18:32,640 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 84 flow. Second operand 2 states and 483 transitions. [2023-01-27 21:18:32,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 142 flow [2023-01-27 21:18:32,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 130 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-27 21:18:32,644 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 68 flow [2023-01-27 21:18:32,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2023-01-27 21:18:32,649 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2023-01-27 21:18:32,649 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 68 flow [2023-01-27 21:18:32,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 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 21:18:32,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:32,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:32,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 21:18:32,650 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:18:32,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:32,652 INFO L85 PathProgramCache]: Analyzing trace with hash -341274689, now seen corresponding path program 1 times [2023-01-27 21:18:32,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:32,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419932028] [2023-01-27 21:18:32,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:32,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:32,914 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 21:18:32,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:32,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419932028] [2023-01-27 21:18:32,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419932028] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:32,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:32,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 21:18:32,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107853291] [2023-01-27 21:18:32,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:32,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:18:32,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:32,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:18:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 21:18:32,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 507 [2023-01-27 21:18:32,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 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 21:18:32,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:32,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 507 [2023-01-27 21:18:32,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:33,054 INFO L130 PetriNetUnfolder]: 529/791 cut-off events. [2023-01-27 21:18:33,055 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-27 21:18:33,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1613 conditions, 791 events. 529/791 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2481 event pairs, 384 based on Foata normal form. 42/687 useless extension candidates. Maximal degree in co-relation 1610. Up to 683 conditions per place. [2023-01-27 21:18:33,058 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 30 selfloop transitions, 2 changer transitions 17/49 dead transitions. [2023-01-27 21:18:33,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 205 flow [2023-01-27 21:18:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 21:18:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 21:18:33,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 808 transitions. [2023-01-27 21:18:33,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398422090729783 [2023-01-27 21:18:33,062 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 808 transitions. [2023-01-27 21:18:33,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 808 transitions. [2023-01-27 21:18:33,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:33,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 808 transitions. [2023-01-27 21:18:33,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 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 21:18:33,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 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 21:18:33,075 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 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 21:18:33,076 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 68 flow. Second operand 4 states and 808 transitions. [2023-01-27 21:18:33,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 205 flow [2023-01-27 21:18:33,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 49 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 21:18:33,077 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 86 flow [2023-01-27 21:18:33,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-01-27 21:18:33,077 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-01-27 21:18:33,078 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 86 flow [2023-01-27 21:18:33,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 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 21:18:33,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:33,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:33,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 21:18:33,078 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:18:33,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:33,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1803368648, now seen corresponding path program 1 times [2023-01-27 21:18:33,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:33,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267666735] [2023-01-27 21:18:33,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:33,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:33,206 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 21:18:33,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:33,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267666735] [2023-01-27 21:18:33,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267666735] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:33,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:33,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:18:33,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252203493] [2023-01-27 21:18:33,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:33,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:18:33,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:33,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:18:33,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 21:18:33,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 507 [2023-01-27 21:18:33,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 0 states have call successors, (0), 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 21:18:33,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:33,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 507 [2023-01-27 21:18:33,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:33,363 INFO L130 PetriNetUnfolder]: 755/1159 cut-off events. [2023-01-27 21:18:33,364 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-01-27 21:18:33,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 1159 events. 755/1159 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4347 event pairs, 579 based on Foata normal form. 116/1097 useless extension candidates. Maximal degree in co-relation 2646. Up to 684 conditions per place. [2023-01-27 21:18:33,367 INFO L137 encePairwiseOnDemand]: 500/507 looper letters, 31 selfloop transitions, 2 changer transitions 35/68 dead transitions. [2023-01-27 21:18:33,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 68 transitions, 314 flow [2023-01-27 21:18:33,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:18:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:18:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1018 transitions. [2023-01-27 21:18:33,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40157790927021697 [2023-01-27 21:18:33,370 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1018 transitions. [2023-01-27 21:18:33,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1018 transitions. [2023-01-27 21:18:33,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:33,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1018 transitions. [2023-01-27 21:18:33,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 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 21:18:33,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 507.0) internal successors, (3042), 6 states have internal predecessors, (3042), 0 states have call successors, (0), 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 21:18:33,375 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 507.0) internal successors, (3042), 6 states have internal predecessors, (3042), 0 states have call successors, (0), 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 21:18:33,375 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 86 flow. Second operand 5 states and 1018 transitions. [2023-01-27 21:18:33,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 68 transitions, 314 flow [2023-01-27 21:18:33,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 68 transitions, 310 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 21:18:33,378 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 108 flow [2023-01-27 21:18:33,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-01-27 21:18:33,379 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-01-27 21:18:33,381 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 108 flow [2023-01-27 21:18:33,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 0 states have call successors, (0), 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 21:18:33,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:33,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:33,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 21:18:33,382 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:18:33,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:33,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1356236085, now seen corresponding path program 1 times [2023-01-27 21:18:33,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:33,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201930846] [2023-01-27 21:18:33,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:33,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:18:33,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:33,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201930846] [2023-01-27 21:18:33,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201930846] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:33,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:33,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:18:33,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410748517] [2023-01-27 21:18:33,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:33,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:18:33,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:33,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:18:33,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 21:18:33,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 507 [2023-01-27 21:18:33,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 195.5) internal successors, (782), 4 states have internal predecessors, (782), 0 states have call successors, (0), 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 21:18:33,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:33,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 507 [2023-01-27 21:18:33,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:33,633 INFO L130 PetriNetUnfolder]: 759/1143 cut-off events. [2023-01-27 21:18:33,633 INFO L131 PetriNetUnfolder]: For 431/431 co-relation queries the response was YES. [2023-01-27 21:18:33,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3097 conditions, 1143 events. 759/1143 cut-off events. For 431/431 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4122 event pairs, 586 based on Foata normal form. 76/1014 useless extension candidates. Maximal degree in co-relation 3088. Up to 685 conditions per place. [2023-01-27 21:18:33,638 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 32 selfloop transitions, 2 changer transitions 20/54 dead transitions. [2023-01-27 21:18:33,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 283 flow [2023-01-27 21:18:33,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 21:18:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 21:18:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 811 transitions. [2023-01-27 21:18:33,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39990138067061143 [2023-01-27 21:18:33,642 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 811 transitions. [2023-01-27 21:18:33,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 811 transitions. [2023-01-27 21:18:33,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:33,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 811 transitions. [2023-01-27 21:18:33,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 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 21:18:33,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 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 21:18:33,649 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 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 21:18:33,649 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 108 flow. Second operand 4 states and 811 transitions. [2023-01-27 21:18:33,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 283 flow [2023-01-27 21:18:33,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 54 transitions, 263 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-01-27 21:18:33,653 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 114 flow [2023-01-27 21:18:33,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-01-27 21:18:33,654 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 6 predicate places. [2023-01-27 21:18:33,654 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 114 flow [2023-01-27 21:18:33,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.5) internal successors, (782), 4 states have internal predecessors, (782), 0 states have call successors, (0), 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 21:18:33,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:33,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:33,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 21:18:33,655 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:18:33,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:33,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2052825742, now seen corresponding path program 1 times [2023-01-27 21:18:33,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:33,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089969888] [2023-01-27 21:18:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:33,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:18:33,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:33,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089969888] [2023-01-27 21:18:33,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089969888] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:33,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:33,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 21:18:33,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003031664] [2023-01-27 21:18:33,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:33,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:18:33,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:33,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:18:33,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:18:33,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-01-27 21:18:33,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:33,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:33,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-01-27 21:18:33,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:33,922 INFO L130 PetriNetUnfolder]: 834/1218 cut-off events. [2023-01-27 21:18:33,922 INFO L131 PetriNetUnfolder]: For 289/289 co-relation queries the response was YES. [2023-01-27 21:18:33,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3231 conditions, 1218 events. 834/1218 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4372 event pairs, 333 based on Foata normal form. 1/972 useless extension candidates. Maximal degree in co-relation 3221. Up to 642 conditions per place. [2023-01-27 21:18:33,926 INFO L137 encePairwiseOnDemand]: 504/507 looper letters, 47 selfloop transitions, 2 changer transitions 6/55 dead transitions. [2023-01-27 21:18:33,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 289 flow [2023-01-27 21:18:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:18:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:18:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2023-01-27 21:18:33,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707429322813938 [2023-01-27 21:18:33,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2023-01-27 21:18:33,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2023-01-27 21:18:33,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:33,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2023-01-27 21:18:33,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 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 21:18:33,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 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 21:18:33,932 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 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 21:18:33,932 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 114 flow. Second operand 3 states and 716 transitions. [2023-01-27 21:18:33,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 289 flow [2023-01-27 21:18:33,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 285 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 21:18:33,933 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 124 flow [2023-01-27 21:18:33,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-01-27 21:18:33,934 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2023-01-27 21:18:33,934 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 124 flow [2023-01-27 21:18:33,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:33,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:33,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:33,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 21:18:33,935 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:18:33,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:33,935 INFO L85 PathProgramCache]: Analyzing trace with hash 402993380, now seen corresponding path program 1 times [2023-01-27 21:18:33,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:33,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592556153] [2023-01-27 21:18:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:33,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:18:34,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:34,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592556153] [2023-01-27 21:18:34,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592556153] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:34,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312806359] [2023-01-27 21:18:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:34,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:34,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:34,061 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 21:18:34,062 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 21:18:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:34,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:18:34,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:18:34,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:18:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:18:34,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312806359] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:18:34,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:18:34,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-27 21:18:34,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654621266] [2023-01-27 21:18:34,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:18:34,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:18:34,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:34,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:18:34,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:18:34,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 507 [2023-01-27 21:18:34,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 124 flow. Second operand has 11 states, 11 states have (on average 191.27272727272728) internal successors, (2104), 11 states have internal predecessors, (2104), 0 states have call successors, (0), 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 21:18:34,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:34,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 507 [2023-01-27 21:18:34,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:34,579 INFO L130 PetriNetUnfolder]: 1355/2016 cut-off events. [2023-01-27 21:18:34,579 INFO L131 PetriNetUnfolder]: For 722/722 co-relation queries the response was YES. [2023-01-27 21:18:34,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5516 conditions, 2016 events. 1355/2016 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8244 event pairs, 714 based on Foata normal form. 72/1706 useless extension candidates. Maximal degree in co-relation 5505. Up to 1218 conditions per place. [2023-01-27 21:18:34,587 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 33 selfloop transitions, 3 changer transitions 42/78 dead transitions. [2023-01-27 21:18:34,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 78 transitions, 419 flow [2023-01-27 21:18:34,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 21:18:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 21:18:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1197 transitions. [2023-01-27 21:18:34,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39349112426035504 [2023-01-27 21:18:34,589 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1197 transitions. [2023-01-27 21:18:34,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1197 transitions. [2023-01-27 21:18:34,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:34,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1197 transitions. [2023-01-27 21:18:34,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 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 21:18:34,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 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 21:18:34,595 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 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 21:18:34,595 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 124 flow. Second operand 6 states and 1197 transitions. [2023-01-27 21:18:34,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 78 transitions, 419 flow [2023-01-27 21:18:34,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 78 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:18:34,597 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 148 flow [2023-01-27 21:18:34,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-01-27 21:18:34,598 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-01-27 21:18:34,598 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 148 flow [2023-01-27 21:18:34,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 191.27272727272728) internal successors, (2104), 11 states have internal predecessors, (2104), 0 states have call successors, (0), 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 21:18:34,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:34,599 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:34,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 21:18:34,820 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 21:18:34,820 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:18:34,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:34,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1520183157, now seen corresponding path program 2 times [2023-01-27 21:18:34,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:34,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449609194] [2023-01-27 21:18:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:34,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-27 21:18:34,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:34,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449609194] [2023-01-27 21:18:34,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449609194] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:34,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:34,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 21:18:34,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300019647] [2023-01-27 21:18:34,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:34,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:18:34,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:34,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:18:34,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:18:34,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-01-27 21:18:34,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 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 21:18:34,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:34,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-01-27 21:18:34,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:35,143 INFO L130 PetriNetUnfolder]: 906/1311 cut-off events. [2023-01-27 21:18:35,143 INFO L131 PetriNetUnfolder]: For 950/950 co-relation queries the response was YES. [2023-01-27 21:18:35,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3985 conditions, 1311 events. 906/1311 cut-off events. For 950/950 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4447 event pairs, 287 based on Foata normal form. 34/1052 useless extension candidates. Maximal degree in co-relation 3971. Up to 844 conditions per place. [2023-01-27 21:18:35,147 INFO L137 encePairwiseOnDemand]: 503/507 looper letters, 43 selfloop transitions, 3 changer transitions 5/51 dead transitions. [2023-01-27 21:18:35,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 308 flow [2023-01-27 21:18:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:18:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:18:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2023-01-27 21:18:35,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46679815910585143 [2023-01-27 21:18:35,149 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2023-01-27 21:18:35,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2023-01-27 21:18:35,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:35,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2023-01-27 21:18:35,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:35,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 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 21:18:35,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 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 21:18:35,154 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 148 flow. Second operand 3 states and 710 transitions. [2023-01-27 21:18:35,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 308 flow [2023-01-27 21:18:35,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 280 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-01-27 21:18:35,157 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 153 flow [2023-01-27 21:18:35,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-01-27 21:18:35,158 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2023-01-27 21:18:35,158 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 153 flow [2023-01-27 21:18:35,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 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 21:18:35,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:35,158 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:35,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 21:18:35,158 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:18:35,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:35,159 INFO L85 PathProgramCache]: Analyzing trace with hash -821181061, now seen corresponding path program 3 times [2023-01-27 21:18:35,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:35,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762354187] [2023-01-27 21:18:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:35,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:18:35,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762354187] [2023-01-27 21:18:35,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762354187] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646927128] [2023-01-27 21:18:35,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:18:35,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:35,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:35,812 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 21:18:35,814 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 21:18:35,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:18:35,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:18:35,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:18:35,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:35,977 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 838 treesize of output 822 [2023-01-27 21:18:36,060 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 21:18:36,085 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 23 treesize of output 7 [2023-01-27 21:18:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-27 21:18:36,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 21:18:36,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646927128] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:36,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 21:18:36,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2023-01-27 21:18:36,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562676278] [2023-01-27 21:18:36,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:36,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 21:18:36,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:36,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 21:18:36,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-01-27 21:18:36,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 507 [2023-01-27 21:18:36,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 153 flow. Second operand has 8 states, 8 states have (on average 194.625) internal successors, (1557), 8 states have internal predecessors, (1557), 0 states have call successors, (0), 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 21:18:36,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:36,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 507 [2023-01-27 21:18:36,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:36,392 INFO L130 PetriNetUnfolder]: 1046/1548 cut-off events. [2023-01-27 21:18:36,392 INFO L131 PetriNetUnfolder]: For 868/868 co-relation queries the response was YES. [2023-01-27 21:18:36,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4682 conditions, 1548 events. 1046/1548 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5963 event pairs, 300 based on Foata normal form. 28/1283 useless extension candidates. Maximal degree in co-relation 4669. Up to 901 conditions per place. [2023-01-27 21:18:36,398 INFO L137 encePairwiseOnDemand]: 500/507 looper letters, 80 selfloop transitions, 6 changer transitions 2/88 dead transitions. [2023-01-27 21:18:36,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 88 transitions, 534 flow [2023-01-27 21:18:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:18:36,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:18:36,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1412 transitions. [2023-01-27 21:18:36,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978585517047056 [2023-01-27 21:18:36,402 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1412 transitions. [2023-01-27 21:18:36,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1412 transitions. [2023-01-27 21:18:36,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:36,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1412 transitions. [2023-01-27 21:18:36,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 201.71428571428572) internal successors, (1412), 7 states have internal predecessors, (1412), 0 states have call successors, (0), 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 21:18:36,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 507.0) internal successors, (4056), 8 states have internal predecessors, (4056), 0 states have call successors, (0), 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 21:18:36,409 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 507.0) internal successors, (4056), 8 states have internal predecessors, (4056), 0 states have call successors, (0), 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 21:18:36,409 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 153 flow. Second operand 7 states and 1412 transitions. [2023-01-27 21:18:36,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 88 transitions, 534 flow [2023-01-27 21:18:36,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 88 transitions, 509 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-01-27 21:18:36,412 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 189 flow [2023-01-27 21:18:36,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=189, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-01-27 21:18:36,414 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-01-27 21:18:36,414 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 189 flow [2023-01-27 21:18:36,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 194.625) internal successors, (1557), 8 states have internal predecessors, (1557), 0 states have call successors, (0), 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 21:18:36,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:36,415 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:36,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 21:18:36,622 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 21:18:36,623 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:18:36,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:36,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2136771815, now seen corresponding path program 4 times [2023-01-27 21:18:36,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:36,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762695730] [2023-01-27 21:18:36,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:36,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:18:37,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762695730] [2023-01-27 21:18:37,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762695730] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198178828] [2023-01-27 21:18:37,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:18:37,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:37,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:37,307 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 21:18:37,310 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 21:18:37,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:18:37,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:18:37,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2023-01-27 21:18:37,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:37,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:18:37,614 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 21:18:37,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:18:37,658 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 21:18:37,695 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 25 treesize of output 7 [2023-01-27 21:18:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:18:37,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:18:37,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:37,913 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 157 treesize of output 141 [2023-01-27 21:18:37,921 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 28 treesize of output 16 [2023-01-27 21:18:37,937 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 27 treesize of output 21 [2023-01-27 21:18:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:18:38,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198178828] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:18:38,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:18:38,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2023-01-27 21:18:38,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311119716] [2023-01-27 21:18:38,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:18:38,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 21:18:38,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:38,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 21:18:38,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=743, Unknown=3, NotChecked=0, Total=870 [2023-01-27 21:18:38,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 507 [2023-01-27 21:18:38,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 189 flow. Second operand has 30 states, 30 states have (on average 160.6) internal successors, (4818), 30 states have internal predecessors, (4818), 0 states have call successors, (0), 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 21:18:38,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:38,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 507 [2023-01-27 21:18:38,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:39,887 INFO L130 PetriNetUnfolder]: 3054/4541 cut-off events. [2023-01-27 21:18:39,887 INFO L131 PetriNetUnfolder]: For 4864/4864 co-relation queries the response was YES. [2023-01-27 21:18:39,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14995 conditions, 4541 events. 3054/4541 cut-off events. For 4864/4864 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21756 event pairs, 739 based on Foata normal form. 198/4110 useless extension candidates. Maximal degree in co-relation 14979. Up to 1117 conditions per place. [2023-01-27 21:18:39,913 INFO L137 encePairwiseOnDemand]: 497/507 looper letters, 213 selfloop transitions, 35 changer transitions 24/272 dead transitions. [2023-01-27 21:18:39,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 272 transitions, 1739 flow [2023-01-27 21:18:39,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 21:18:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 21:18:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4033 transitions. [2023-01-27 21:18:39,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3314431295200526 [2023-01-27 21:18:39,921 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4033 transitions. [2023-01-27 21:18:39,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4033 transitions. [2023-01-27 21:18:39,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:39,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4033 transitions. [2023-01-27 21:18:39,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 168.04166666666666) internal successors, (4033), 24 states have internal predecessors, (4033), 0 states have call successors, (0), 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 21:18:39,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 507.0) internal successors, (12675), 25 states have internal predecessors, (12675), 0 states have call successors, (0), 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 21:18:39,973 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 507.0) internal successors, (12675), 25 states have internal predecessors, (12675), 0 states have call successors, (0), 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 21:18:39,973 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 189 flow. Second operand 24 states and 4033 transitions. [2023-01-27 21:18:39,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 272 transitions, 1739 flow [2023-01-27 21:18:39,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 272 transitions, 1718 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-01-27 21:18:39,985 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 561 flow [2023-01-27 21:18:39,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=561, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2023-01-27 21:18:39,986 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 53 predicate places. [2023-01-27 21:18:39,986 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 561 flow [2023-01-27 21:18:39,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 160.6) internal successors, (4818), 30 states have internal predecessors, (4818), 0 states have call successors, (0), 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 21:18:39,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:39,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:40,001 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 21:18:40,196 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 21:18:40,197 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:18:40,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:40,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1230266139, now seen corresponding path program 5 times [2023-01-27 21:18:40,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:40,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936959890] [2023-01-27 21:18:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:40,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-27 21:18:40,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:40,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936959890] [2023-01-27 21:18:40,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936959890] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:40,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:40,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 21:18:40,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676824215] [2023-01-27 21:18:40,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:40,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:18:40,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:18:40,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:18:40,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 507 [2023-01-27 21:18:40,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 561 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 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 21:18:40,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:40,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 507 [2023-01-27 21:18:40,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:40,486 INFO L130 PetriNetUnfolder]: 1118/1789 cut-off events. [2023-01-27 21:18:40,487 INFO L131 PetriNetUnfolder]: For 6844/6844 co-relation queries the response was YES. [2023-01-27 21:18:40,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7734 conditions, 1789 events. 1118/1789 cut-off events. For 6844/6844 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7126 event pairs, 400 based on Foata normal form. 60/1658 useless extension candidates. Maximal degree in co-relation 7706. Up to 1363 conditions per place. [2023-01-27 21:18:40,499 INFO L137 encePairwiseOnDemand]: 503/507 looper letters, 71 selfloop transitions, 4 changer transitions 1/76 dead transitions. [2023-01-27 21:18:40,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 76 transitions, 706 flow [2023-01-27 21:18:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:18:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:18:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 694 transitions. [2023-01-27 21:18:40,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45627876397107164 [2023-01-27 21:18:40,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 694 transitions. [2023-01-27 21:18:40,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 694 transitions. [2023-01-27 21:18:40,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:40,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 694 transitions. [2023-01-27 21:18:40,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 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 21:18:40,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 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 21:18:40,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 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 21:18:40,504 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 561 flow. Second operand 3 states and 694 transitions. [2023-01-27 21:18:40,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 76 transitions, 706 flow [2023-01-27 21:18:40,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 575 flow, removed 55 selfloop flow, removed 10 redundant places. [2023-01-27 21:18:40,521 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 422 flow [2023-01-27 21:18:40,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=422, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2023-01-27 21:18:40,522 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 44 predicate places. [2023-01-27 21:18:40,522 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 422 flow [2023-01-27 21:18:40,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 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 21:18:40,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:40,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:40,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 21:18:40,522 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:18:40,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:40,523 INFO L85 PathProgramCache]: Analyzing trace with hash -969831955, now seen corresponding path program 1 times [2023-01-27 21:18:40,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:40,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525708459] [2023-01-27 21:18:40,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:40,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:18:40,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:40,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525708459] [2023-01-27 21:18:40,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525708459] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:40,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632262840] [2023-01-27 21:18:40,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:40,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:40,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:40,621 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 21:18:40,623 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 21:18:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:40,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:18:40,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:18:40,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:18:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:18:40,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632262840] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:18:40,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:18:40,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-01-27 21:18:40,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432276968] [2023-01-27 21:18:40,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:18:40,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:18:40,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:40,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:18:40,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:18:40,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 507 [2023-01-27 21:18:40,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 422 flow. Second operand has 11 states, 11 states have (on average 191.0) internal successors, (2101), 11 states have internal predecessors, (2101), 0 states have call successors, (0), 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 21:18:40,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:40,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 507 [2023-01-27 21:18:40,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:41,212 INFO L130 PetriNetUnfolder]: 1919/3133 cut-off events. [2023-01-27 21:18:41,212 INFO L131 PetriNetUnfolder]: For 8973/8973 co-relation queries the response was YES. [2023-01-27 21:18:41,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12256 conditions, 3133 events. 1919/3133 cut-off events. For 8973/8973 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 14883 event pairs, 925 based on Foata normal form. 176/2969 useless extension candidates. Maximal degree in co-relation 12233. Up to 1742 conditions per place. [2023-01-27 21:18:41,225 INFO L137 encePairwiseOnDemand]: 502/507 looper letters, 98 selfloop transitions, 9 changer transitions 20/127 dead transitions. [2023-01-27 21:18:41,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 127 transitions, 1003 flow [2023-01-27 21:18:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 21:18:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 21:18:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1190 transitions. [2023-01-27 21:18:41,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39119000657462194 [2023-01-27 21:18:41,228 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1190 transitions. [2023-01-27 21:18:41,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1190 transitions. [2023-01-27 21:18:41,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:41,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1190 transitions. [2023-01-27 21:18:41,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.33333333333334) internal successors, (1190), 6 states have internal predecessors, (1190), 0 states have call successors, (0), 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 21:18:41,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 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 21:18:41,232 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 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 21:18:41,233 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 422 flow. Second operand 6 states and 1190 transitions. [2023-01-27 21:18:41,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 127 transitions, 1003 flow [2023-01-27 21:18:41,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 127 transitions, 972 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-01-27 21:18:41,244 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 468 flow [2023-01-27 21:18:41,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=468, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2023-01-27 21:18:41,244 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 49 predicate places. [2023-01-27 21:18:41,244 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 468 flow [2023-01-27 21:18:41,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 191.0) internal successors, (2101), 11 states have internal predecessors, (2101), 0 states have call successors, (0), 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 21:18:41,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:41,245 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:41,252 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 21:18:41,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:41,450 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:18:41,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:41,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1260700386, now seen corresponding path program 2 times [2023-01-27 21:18:41,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:41,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915733579] [2023-01-27 21:18:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:41,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:18:42,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:42,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915733579] [2023-01-27 21:18:42,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915733579] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:42,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362527875] [2023-01-27 21:18:42,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:18:42,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:42,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:42,481 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 21:18:42,483 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 21:18:42,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:18:42,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:18:42,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-27 21:18:42,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:43,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:18:43,011 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 16 treesize of output 18 [2023-01-27 21:18:43,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:43,181 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 44 treesize of output 31 [2023-01-27 21:18:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:18:43,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:18:43,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:43,576 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 146 treesize of output 190 [2023-01-27 21:18:43,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:43,597 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 87 treesize of output 97 [2023-01-27 21:18:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:18:44,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362527875] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:18:44,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:18:44,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 44 [2023-01-27 21:18:44,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085299106] [2023-01-27 21:18:44,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:18:44,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-27 21:18:44,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:44,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-27 21:18:44,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1712, Unknown=2, NotChecked=0, Total=1980 [2023-01-27 21:18:44,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 507 [2023-01-27 21:18:44,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 468 flow. Second operand has 45 states, 45 states have (on average 149.93333333333334) internal successors, (6747), 45 states have internal predecessors, (6747), 0 states have call successors, (0), 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 21:18:44,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:44,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 507 [2023-01-27 21:18:44,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:57,578 WARN L222 SmtUtils]: Spent 12.23s on a formula simplification. DAG size of input: 90 DAG size of output: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:19:01,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:19:04,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:19:11,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:19:18,466 WARN L222 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 82 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:19:21,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:19:46,237 WARN L222 SmtUtils]: Spent 24.38s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:20:31,218 WARN L222 SmtUtils]: Spent 44.90s on a formula simplification. DAG size of input: 80 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:20:33,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:20:35,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:20:37,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:20:40,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:20:42,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:20:42,823 INFO L130 PetriNetUnfolder]: 2218/3792 cut-off events. [2023-01-27 21:20:42,823 INFO L131 PetriNetUnfolder]: For 10298/10298 co-relation queries the response was YES. [2023-01-27 21:20:42,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14406 conditions, 3792 events. 2218/3792 cut-off events. For 10298/10298 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 20186 event pairs, 527 based on Foata normal form. 64/3489 useless extension candidates. Maximal degree in co-relation 14381. Up to 794 conditions per place. [2023-01-27 21:20:42,842 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 330 selfloop transitions, 111 changer transitions 29/470 dead transitions. [2023-01-27 21:20:42,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 470 transitions, 3354 flow [2023-01-27 21:20:42,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-01-27 21:20:42,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-01-27 21:20:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 8854 transitions. [2023-01-27 21:20:42,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3063773833004602 [2023-01-27 21:20:42,861 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 8854 transitions. [2023-01-27 21:20:42,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 8854 transitions. [2023-01-27 21:20:42,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:20:42,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 8854 transitions. [2023-01-27 21:20:42,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 155.33333333333334) internal successors, (8854), 57 states have internal predecessors, (8854), 0 states have call successors, (0), 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 21:20:42,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 507.0) internal successors, (29406), 58 states have internal predecessors, (29406), 0 states have call successors, (0), 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 21:20:42,903 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 507.0) internal successors, (29406), 58 states have internal predecessors, (29406), 0 states have call successors, (0), 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 21:20:42,903 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 468 flow. Second operand 57 states and 8854 transitions. [2023-01-27 21:20:42,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 470 transitions, 3354 flow [2023-01-27 21:20:42,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 470 transitions, 3251 flow, removed 43 selfloop flow, removed 3 redundant places. [2023-01-27 21:20:42,926 INFO L231 Difference]: Finished difference. Result has 165 places, 184 transitions, 1712 flow [2023-01-27 21:20:42,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1712, PETRI_PLACES=165, PETRI_TRANSITIONS=184} [2023-01-27 21:20:42,927 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 130 predicate places. [2023-01-27 21:20:42,927 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 184 transitions, 1712 flow [2023-01-27 21:20:42,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 149.93333333333334) internal successors, (6747), 45 states have internal predecessors, (6747), 0 states have call successors, (0), 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 21:20:42,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:20:42,929 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:20:42,936 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 21:20:43,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-27 21:20:43,134 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:20:43,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:20:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash -716681592, now seen corresponding path program 3 times [2023-01-27 21:20:43,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:20:43,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627355282] [2023-01-27 21:20:43,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:20:43,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:20:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:20:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:20:44,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:20:44,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627355282] [2023-01-27 21:20:44,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627355282] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:20:44,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082501405] [2023-01-27 21:20:44,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:20:44,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:20:44,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:20:44,261 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 21:20:44,264 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 21:20:44,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:20:44,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:20:44,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-27 21:20:44,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:20:45,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:20:45,017 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-01-27 21:20:45,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 48 [2023-01-27 21:20:45,024 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 31 treesize of output 17 [2023-01-27 21:20:45,079 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 23 treesize of output 7 [2023-01-27 21:20:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:20:45,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:20:45,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:20:45,388 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 62 treesize of output 122 [2023-01-27 21:20:45,391 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 9 treesize of output 3 [2023-01-27 21:20:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:20:45,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082501405] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:20:45,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:20:45,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 40 [2023-01-27 21:20:45,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156929760] [2023-01-27 21:20:45,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:20:45,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-27 21:20:45,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:20:45,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-27 21:20:45,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1463, Unknown=11, NotChecked=0, Total=1640 [2023-01-27 21:20:45,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 507 [2023-01-27 21:20:45,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 184 transitions, 1712 flow. Second operand has 41 states, 41 states have (on average 147.1951219512195) internal successors, (6035), 41 states have internal predecessors, (6035), 0 states have call successors, (0), 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 21:20:45,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:20:45,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 507 [2023-01-27 21:20:45,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:20:55,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-27 21:20:59,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-27 21:21:18,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 21:21:22,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 21:21:27,179 INFO L130 PetriNetUnfolder]: 19442/31074 cut-off events. [2023-01-27 21:21:27,179 INFO L131 PetriNetUnfolder]: For 225931/225931 co-relation queries the response was YES. [2023-01-27 21:21:27,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159377 conditions, 31074 events. 19442/31074 cut-off events. For 225931/225931 co-relation queries the response was YES. Maximal size of possible extension queue 1057. Compared 221536 event pairs, 2384 based on Foata normal form. 2470/32532 useless extension candidates. Maximal degree in co-relation 159326. Up to 7053 conditions per place. [2023-01-27 21:21:27,422 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 1511 selfloop transitions, 944 changer transitions 280/2735 dead transitions. [2023-01-27 21:21:27,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 2735 transitions, 27725 flow [2023-01-27 21:21:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2023-01-27 21:21:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2023-01-27 21:21:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 32825 transitions. [2023-01-27 21:21:27,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3025401389887371 [2023-01-27 21:21:27,468 INFO L72 ComplementDD]: Start complementDD. Operand 214 states and 32825 transitions. [2023-01-27 21:21:27,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 214 states and 32825 transitions. [2023-01-27 21:21:27,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:21:27,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 214 states and 32825 transitions. [2023-01-27 21:21:27,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 215 states, 214 states have (on average 153.38785046728972) internal successors, (32825), 214 states have internal predecessors, (32825), 0 states have call successors, (0), 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 21:21:27,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 215 states, 215 states have (on average 507.0) internal successors, (109005), 215 states have internal predecessors, (109005), 0 states have call successors, (0), 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 21:21:27,710 INFO L81 ComplementDD]: Finished complementDD. Result has 215 states, 215 states have (on average 507.0) internal successors, (109005), 215 states have internal predecessors, (109005), 0 states have call successors, (0), 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 21:21:27,710 INFO L175 Difference]: Start difference. First operand has 165 places, 184 transitions, 1712 flow. Second operand 214 states and 32825 transitions. [2023-01-27 21:21:27,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 2735 transitions, 27725 flow [2023-01-27 21:21:28,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 2735 transitions, 24448 flow, removed 1587 selfloop flow, removed 8 redundant places. [2023-01-27 21:21:28,638 INFO L231 Difference]: Finished difference. Result has 491 places, 1164 transitions, 13833 flow [2023-01-27 21:21:28,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=214, PETRI_FLOW=13833, PETRI_PLACES=491, PETRI_TRANSITIONS=1164} [2023-01-27 21:21:28,638 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 456 predicate places. [2023-01-27 21:21:28,638 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 1164 transitions, 13833 flow [2023-01-27 21:21:28,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 147.1951219512195) internal successors, (6035), 41 states have internal predecessors, (6035), 0 states have call successors, (0), 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 21:21:28,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:21:28,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:21:28,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 21:21:28,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:21:28,844 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:21:28,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:21:28,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1581646834, now seen corresponding path program 4 times [2023-01-27 21:21:28,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:21:28,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979210075] [2023-01-27 21:21:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:21:28,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:21:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:21:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:21:30,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:21:30,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979210075] [2023-01-27 21:21:30,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979210075] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:21:30,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611377727] [2023-01-27 21:21:30,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:21:30,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:21:30,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:21:30,290 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 21:21:30,292 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 21:21:30,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:21:30,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:21:30,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-27 21:21:30,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:21:30,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:21:30,867 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 16 treesize of output 18 [2023-01-27 21:21:30,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:21:30,963 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 16 treesize of output 18 [2023-01-27 21:21:31,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:21:31,271 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 40 treesize of output 48 [2023-01-27 21:21:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:21:31,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:21:32,024 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:21:32,024 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 516 treesize of output 528 [2023-01-27 21:21:32,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:21:32,056 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 433 treesize of output 365 [2023-01-27 21:21:32,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:21:32,091 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 304 treesize of output 290 [2023-01-27 21:21:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:21:48,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611377727] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:21:48,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:21:48,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 47 [2023-01-27 21:21:48,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983041304] [2023-01-27 21:21:48,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:21:48,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-01-27 21:21:48,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:21:48,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-01-27 21:21:48,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1998, Unknown=3, NotChecked=0, Total=2256 [2023-01-27 21:21:48,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 507 [2023-01-27 21:21:48,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 1164 transitions, 13833 flow. Second operand has 48 states, 48 states have (on average 146.89583333333334) internal successors, (7051), 48 states have internal predecessors, (7051), 0 states have call successors, (0), 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 21:21:48,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:21:48,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 507 [2023-01-27 21:21:48,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:22:02,337 INFO L130 PetriNetUnfolder]: 15743/25549 cut-off events. [2023-01-27 21:22:02,337 INFO L131 PetriNetUnfolder]: For 3112331/3112331 co-relation queries the response was YES. [2023-01-27 21:22:02,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253064 conditions, 25549 events. 15743/25549 cut-off events. For 3112331/3112331 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 180877 event pairs, 4339 based on Foata normal form. 374/25027 useless extension candidates. Maximal degree in co-relation 252889. Up to 13661 conditions per place. [2023-01-27 21:22:02,960 INFO L137 encePairwiseOnDemand]: 492/507 looper letters, 840 selfloop transitions, 443 changer transitions 50/1333 dead transitions. [2023-01-27 21:22:02,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 1333 transitions, 19175 flow [2023-01-27 21:22:02,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-27 21:22:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-27 21:22:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6090 transitions. [2023-01-27 21:22:02,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30029585798816566 [2023-01-27 21:22:02,966 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6090 transitions. [2023-01-27 21:22:02,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6090 transitions. [2023-01-27 21:22:02,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:22:02,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6090 transitions. [2023-01-27 21:22:02,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 152.25) internal successors, (6090), 40 states have internal predecessors, (6090), 0 states have call successors, (0), 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 21:22:02,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 507.0) internal successors, (20787), 41 states have internal predecessors, (20787), 0 states have call successors, (0), 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 21:22:02,985 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 507.0) internal successors, (20787), 41 states have internal predecessors, (20787), 0 states have call successors, (0), 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 21:22:02,985 INFO L175 Difference]: Start difference. First operand has 491 places, 1164 transitions, 13833 flow. Second operand 40 states and 6090 transitions. [2023-01-27 21:22:02,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 1333 transitions, 19175 flow [2023-01-27 21:22:27,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1333 transitions, 16649 flow, removed 1146 selfloop flow, removed 53 redundant places. [2023-01-27 21:22:27,537 INFO L231 Difference]: Finished difference. Result has 473 places, 1032 transitions, 12463 flow [2023-01-27 21:22:27,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=9876, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=12463, PETRI_PLACES=473, PETRI_TRANSITIONS=1032} [2023-01-27 21:22:27,538 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 438 predicate places. [2023-01-27 21:22:27,539 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 1032 transitions, 12463 flow [2023-01-27 21:22:27,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 146.89583333333334) internal successors, (7051), 48 states have internal predecessors, (7051), 0 states have call successors, (0), 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 21:22:27,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:22:27,539 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:22:27,546 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 21:22:27,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:22:27,740 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:22:27,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:22:27,741 INFO L85 PathProgramCache]: Analyzing trace with hash -861947296, now seen corresponding path program 5 times [2023-01-27 21:22:27,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:22:27,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610391219] [2023-01-27 21:22:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:22:27,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:22:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:22:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:22:28,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:22:28,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610391219] [2023-01-27 21:22:28,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610391219] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:22:28,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517809759] [2023-01-27 21:22:28,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:22:28,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:22:28,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:22:28,877 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 21:22:28,879 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 21:22:29,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:22:29,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:22:29,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 60 conjunts are in the unsatisfiable core [2023-01-27 21:22:29,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:22:29,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:22:29,127 INFO L321 Elim1Store]: treesize reduction 63, result has 32.3 percent of original size [2023-01-27 21:22:29,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 35 [2023-01-27 21:22:29,269 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-01-27 21:22:29,270 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 16 treesize of output 18 [2023-01-27 21:22:29,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:22:29,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-27 21:22:29,784 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-01-27 21:22:29,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 42 [2023-01-27 21:22:29,799 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 17 [2023-01-27 21:22:29,885 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 23 treesize of output 7 [2023-01-27 21:22:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:22:29,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:22:30,389 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:22:30,389 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 262 treesize of output 298 [2023-01-27 21:22:30,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:22:30,414 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 101 treesize of output 111 [2023-01-27 21:22:30,423 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 32 treesize of output 20 [2023-01-27 21:22:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:22:33,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517809759] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:22:33,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:22:33,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 45 [2023-01-27 21:22:33,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532549264] [2023-01-27 21:22:33,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:22:33,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-27 21:22:33,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:22:33,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-27 21:22:33,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1886, Unknown=5, NotChecked=0, Total=2070 [2023-01-27 21:22:33,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 507 [2023-01-27 21:22:33,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 1032 transitions, 12463 flow. Second operand has 46 states, 46 states have (on average 135.84782608695653) internal successors, (6249), 46 states have internal predecessors, (6249), 0 states have call successors, (0), 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 21:22:33,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:22:33,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 507 [2023-01-27 21:22:33,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:22:54,222 WARN L222 SmtUtils]: Spent 18.26s on a formula simplification. DAG size of input: 102 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:23:12,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:23:41,786 WARN L222 SmtUtils]: Spent 26.40s on a formula simplification. DAG size of input: 112 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:23:52,709 WARN L222 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:23:54,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:23:56,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:23:58,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:23:59,878 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-01-27 21:23:59,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-01-27 21:23:59,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-27 21:24:00,085 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,SelfDestructingSolverStorable14 [2023-01-27 21:24:00,086 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:665) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:269) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.enhanceAnddeterminizeInterpolantAutomaton(CegarLoopForPetriNet.java:489) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.refineAbstraction(CegarLoopForPetriNet.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 36 more [2023-01-27 21:24:00,098 INFO L158 Benchmark]: Toolchain (without parser) took 335917.72ms. Allocated memory was 557.8MB in the beginning and 6.4GB in the end (delta: 5.9GB). Free memory was 520.1MB in the beginning and 4.1GB in the end (delta: -3.6GB). Peak memory consumption was 2.3GB. Max. memory is 16.0GB. [2023-01-27 21:24:00,098 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 358.6MB. Free memory is still 310.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 21:24:00,098 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.02ms. Allocated memory is still 557.8MB. Free memory was 520.1MB in the beginning and 507.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-27 21:24:00,098 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.43ms. Allocated memory is still 557.8MB. Free memory was 507.5MB in the beginning and 504.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 21:24:00,098 INFO L158 Benchmark]: Boogie Preprocessor took 21.95ms. Allocated memory is still 557.8MB. Free memory was 504.9MB in the beginning and 502.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 21:24:00,098 INFO L158 Benchmark]: RCFGBuilder took 553.72ms. Allocated memory is still 557.8MB. Free memory was 502.5MB in the beginning and 515.6MB in the end (delta: -13.1MB). Peak memory consumption was 40.0MB. Max. memory is 16.0GB. [2023-01-27 21:24:00,099 INFO L158 Benchmark]: TraceAbstraction took 335092.15ms. Allocated memory was 557.8MB in the beginning and 6.4GB in the end (delta: 5.9GB). Free memory was 514.4MB in the beginning and 4.1GB in the end (delta: -3.6GB). Peak memory consumption was 2.3GB. Max. memory is 16.0GB. [2023-01-27 21:24:00,100 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 358.6MB. Free memory is still 310.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 216.02ms. Allocated memory is still 557.8MB. Free memory was 520.1MB in the beginning and 507.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 28.43ms. Allocated memory is still 557.8MB. Free memory was 507.5MB in the beginning and 504.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 21.95ms. Allocated memory is still 557.8MB. Free memory was 504.9MB in the beginning and 502.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 553.72ms. Allocated memory is still 557.8MB. Free memory was 502.5MB in the beginning and 515.6MB in the end (delta: -13.1MB). Peak memory consumption was 40.0MB. Max. memory is 16.0GB. * TraceAbstraction took 335092.15ms. Allocated memory was 557.8MB in the beginning and 6.4GB in the end (delta: 5.9GB). Free memory was 514.4MB in the beginning and 4.1GB in the end (delta: -3.6GB). Peak memory consumption was 2.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.0s, 230 PlacesBefore, 35 PlacesAfterwards, 242 TransitionsBefore, 33 TransitionsAfterwards, 1962 CoEnabledTransitionPairs, 7 FixpointIterations, 160 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 35 TrivialYvCompositions, 12 ConcurrentYvCompositions, 14 ChoiceCompositions, 252 TotalNumberOfCompositions, 3161 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2304, independent: 2216, independent conditional: 0, independent unconditional: 2216, dependent: 88, dependent conditional: 0, dependent unconditional: 88, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1112, independent: 1085, independent conditional: 0, independent unconditional: 1085, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2304, independent: 1131, independent conditional: 0, independent unconditional: 1131, dependent: 61, dependent conditional: 0, dependent unconditional: 61, unknown: 1112, unknown conditional: 0, unknown unconditional: 1112] , Statistics on independence cache: Total cache size (in pairs): 110, Positive cache size: 101, Positive conditional cache size: 0, Positive unconditional cache size: 101, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...