/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/chl-chromosome-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 20:06:16,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 20:06:16,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 20:06:16,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 20:06:16,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 20:06:16,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 20:06:16,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 20:06:16,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 20:06:16,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 20:06:16,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 20:06:16,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 20:06:16,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 20:06:16,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 20:06:16,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 20:06:16,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 20:06:16,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 20:06:16,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 20:06:16,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 20:06:16,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 20:06:16,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 20:06:16,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 20:06:16,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 20:06:16,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 20:06:16,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 20:06:16,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 20:06:16,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 20:06:16,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 20:06:16,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 20:06:16,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 20:06:16,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 20:06:16,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 20:06:16,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 20:06:16,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 20:06:16,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 20:06:16,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 20:06:16,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 20:06:16,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 20:06:16,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 20:06:16,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 20:06:16,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 20:06:16,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 20:06:16,480 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 20:06:16,500 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 20:06:16,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 20:06:16,501 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 20:06:16,501 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 20:06:16,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 20:06:16,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 20:06:16,502 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 20:06:16,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 20:06:16,503 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 20:06:16,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 20:06:16,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 20:06:16,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 20:06:16,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 20:06:16,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 20:06:16,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 20:06:16,504 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 20:06:16,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 20:06:16,504 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 20:06:16,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 20:06:16,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 20:06:16,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 20:06:16,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 20:06:16,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 20:06:16,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 20:06:16,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 20:06:16,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 20:06:16,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 20:06:16,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 20:06:16,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 20:06:16,505 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 20:06:16,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 20:06:16,505 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 20:06:16,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 20:06:16,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 20:06:16,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 20:06:16,843 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 20:06:16,843 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 20:06:16,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-01-27 20:06:18,392 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 20:06:18,689 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 20:06:18,689 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-01-27 20:06:18,695 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd3f6beeb/3aaf064524954063ada361fecb02e33d/FLAG55b44af0f [2023-01-27 20:06:18,722 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd3f6beeb/3aaf064524954063ada361fecb02e33d [2023-01-27 20:06:18,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 20:06:18,726 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 20:06:18,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 20:06:18,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 20:06:18,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 20:06:18,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 08:06:18" (1/1) ... [2023-01-27 20:06:18,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b15d3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:06:18, skipping insertion in model container [2023-01-27 20:06:18,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 08:06:18" (1/1) ... [2023-01-27 20:06:18,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 20:06:18,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 20:06:18,974 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/chl-chromosome-symm.wvr.c[2695,2708] [2023-01-27 20:06:18,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 20:06:19,018 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 20:06:19,053 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/chl-chromosome-symm.wvr.c[2695,2708] [2023-01-27 20:06:19,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 20:06:19,081 INFO L208 MainTranslator]: Completed translation [2023-01-27 20:06:19,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:06:19 WrapperNode [2023-01-27 20:06:19,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 20:06:19,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 20:06:19,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 20:06:19,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 20:06:19,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:06:19" (1/1) ... [2023-01-27 20:06:19,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:06:19" (1/1) ... [2023-01-27 20:06:19,156 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 198 [2023-01-27 20:06:19,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 20:06:19,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 20:06:19,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 20:06:19,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 20:06:19,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:06:19" (1/1) ... [2023-01-27 20:06:19,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:06:19" (1/1) ... [2023-01-27 20:06:19,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:06:19" (1/1) ... [2023-01-27 20:06:19,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:06:19" (1/1) ... [2023-01-27 20:06:19,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:06:19" (1/1) ... [2023-01-27 20:06:19,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:06:19" (1/1) ... [2023-01-27 20:06:19,220 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:06:19" (1/1) ... [2023-01-27 20:06:19,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:06:19" (1/1) ... [2023-01-27 20:06:19,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 20:06:19,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 20:06:19,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 20:06:19,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 20:06:19,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:06:19" (1/1) ... [2023-01-27 20:06:19,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 20:06:19,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:06:19,310 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 20:06:19,313 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 20:06:19,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 20:06:19,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 20:06:19,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 20:06:19,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 20:06:19,356 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 20:06:19,356 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 20:06:19,356 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 20:06:19,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 20:06:19,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 20:06:19,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 20:06:19,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 20:06:19,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 20:06:19,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 20:06:19,361 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 20:06:19,520 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 20:06:19,521 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 20:06:20,026 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 20:06:20,033 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 20:06:20,033 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-27 20:06:20,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 08:06:20 BoogieIcfgContainer [2023-01-27 20:06:20,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 20:06:20,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 20:06:20,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 20:06:20,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 20:06:20,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 08:06:18" (1/3) ... [2023-01-27 20:06:20,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56233920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 08:06:20, skipping insertion in model container [2023-01-27 20:06:20,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:06:19" (2/3) ... [2023-01-27 20:06:20,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56233920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 08:06:20, skipping insertion in model container [2023-01-27 20:06:20,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 08:06:20" (3/3) ... [2023-01-27 20:06:20,061 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2023-01-27 20:06:20,074 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 20:06:20,074 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 20:06:20,074 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 20:06:20,292 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 20:06:20,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 478 flow [2023-01-27 20:06:20,456 INFO L130 PetriNetUnfolder]: 21/229 cut-off events. [2023-01-27 20:06:20,456 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 20:06:20,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 229 events. 21/229 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2023-01-27 20:06:20,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 231 transitions, 478 flow [2023-01-27 20:06:20,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 221 transitions, 454 flow [2023-01-27 20:06:20,472 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 20:06:20,482 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 221 transitions, 454 flow [2023-01-27 20:06:20,485 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 221 transitions, 454 flow [2023-01-27 20:06:20,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 221 transitions, 454 flow [2023-01-27 20:06:20,534 INFO L130 PetriNetUnfolder]: 21/221 cut-off events. [2023-01-27 20:06:20,534 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 20:06:20,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 221 events. 21/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 269 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2023-01-27 20:06:20,540 INFO L119 LiptonReduction]: Number of co-enabled transitions 5400 [2023-01-27 20:06:26,947 INFO L134 LiptonReduction]: Checked pairs total: 5353 [2023-01-27 20:06:26,947 INFO L136 LiptonReduction]: Total number of compositions: 258 [2023-01-27 20:06:26,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 20:06:26,976 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;@1979107d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 20:06:26,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 20:06:26,991 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2023-01-27 20:06:26,992 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 20:06:26,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:26,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:26,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:26,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:26,997 INFO L85 PathProgramCache]: Analyzing trace with hash 659682560, now seen corresponding path program 1 times [2023-01-27 20:06:27,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:27,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159829611] [2023-01-27 20:06:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:27,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:27,483 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 20:06:27,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:27,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159829611] [2023-01-27 20:06:27,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159829611] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:06:27,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:06:27,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 20:06:27,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682028590] [2023-01-27 20:06:27,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:06:27,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 20:06:27,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:06:27,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 20:06:27,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 20:06:27,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 489 [2023-01-27 20:06:27,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:27,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:06:27,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 489 [2023-01-27 20:06:27,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:06:27,575 INFO L130 PetriNetUnfolder]: 53/98 cut-off events. [2023-01-27 20:06:27,575 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-01-27 20:06:27,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 98 events. 53/98 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 190 event pairs, 33 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 160. Up to 97 conditions per place. [2023-01-27 20:06:27,579 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 18 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2023-01-27 20:06:27,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 100 flow [2023-01-27 20:06:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 20:06:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 20:06:27,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2023-01-27 20:06:27,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3987730061349693 [2023-01-27 20:06:27,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2023-01-27 20:06:27,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2023-01-27 20:06:27,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:06:27,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2023-01-27 20:06:27,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:27,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:27,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:27,619 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 52 flow. Second operand 3 states and 585 transitions. [2023-01-27 20:06:27,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 100 flow [2023-01-27 20:06:27,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 20:06:27,641 INFO L231 Difference]: Finished difference. Result has 22 places, 22 transitions, 66 flow [2023-01-27 20:06:27,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=22} [2023-01-27 20:06:27,647 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-01-27 20:06:27,647 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 22 transitions, 66 flow [2023-01-27 20:06:27,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:27,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:27,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:27,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 20:06:27,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:27,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1043919621, now seen corresponding path program 1 times [2023-01-27 20:06:27,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:27,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120382881] [2023-01-27 20:06:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:27,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:06:27,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:27,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120382881] [2023-01-27 20:06:27,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120382881] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:06:27,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299601881] [2023-01-27 20:06:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:27,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:27,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:06:27,889 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 20:06:27,941 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 20:06:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:28,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-27 20:06:28,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:06:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:06:28,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:06:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:06:28,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299601881] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:06:28,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:06:28,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-01-27 20:06:28,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448754058] [2023-01-27 20:06:28,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:06:28,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 20:06:28,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:06:28,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 20:06:28,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-01-27 20:06:28,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 489 [2023-01-27 20:06:28,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 22 transitions, 66 flow. Second operand has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:28,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:06:28,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 489 [2023-01-27 20:06:28,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:06:28,295 INFO L130 PetriNetUnfolder]: 53/104 cut-off events. [2023-01-27 20:06:28,296 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 20:06:28,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 104 events. 53/104 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 187 event pairs, 33 based on Foata normal form. 3/88 useless extension candidates. Maximal degree in co-relation 202. Up to 97 conditions per place. [2023-01-27 20:06:28,296 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 18 selfloop transitions, 10 changer transitions 0/28 dead transitions. [2023-01-27 20:06:28,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 146 flow [2023-01-27 20:06:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 20:06:28,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 20:06:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1156 transitions. [2023-01-27 20:06:28,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3940013633265167 [2023-01-27 20:06:28,304 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1156 transitions. [2023-01-27 20:06:28,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1156 transitions. [2023-01-27 20:06:28,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:06:28,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1156 transitions. [2023-01-27 20:06:28,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.66666666666666) internal successors, (1156), 6 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:28,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:28,311 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:28,311 INFO L175 Difference]: Start difference. First operand has 22 places, 22 transitions, 66 flow. Second operand 6 states and 1156 transitions. [2023-01-27 20:06:28,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 146 flow [2023-01-27 20:06:28,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 20:06:28,312 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 128 flow [2023-01-27 20:06:28,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-01-27 20:06:28,319 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2023-01-27 20:06:28,319 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 128 flow [2023-01-27 20:06:28,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:28,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:28,320 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:28,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 20:06:28,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:28,525 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:28,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:28,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1002026432, now seen corresponding path program 2 times [2023-01-27 20:06:28,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:28,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20036673] [2023-01-27 20:06:28,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:28,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 20:06:28,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:28,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20036673] [2023-01-27 20:06:28,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20036673] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:06:28,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537585812] [2023-01-27 20:06:28,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:06:28,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:28,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:06:28,785 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 20:06:28,809 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 20:06:28,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 20:06:28,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:06:28,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 20:06:28,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:06:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-01-27 20:06:29,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:06:29,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537585812] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:06:29,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:06:29,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-01-27 20:06:29,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634205544] [2023-01-27 20:06:29,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:06:29,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 20:06:29,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:06:29,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 20:06:29,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:06:29,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 489 [2023-01-27 20:06:29,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:29,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:06:29,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 489 [2023-01-27 20:06:29,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:06:29,118 INFO L130 PetriNetUnfolder]: 88/171 cut-off events. [2023-01-27 20:06:29,118 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 20:06:29,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 171 events. 88/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 478 event pairs, 33 based on Foata normal form. 4/140 useless extension candidates. Maximal degree in co-relation 330. Up to 105 conditions per place. [2023-01-27 20:06:29,119 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 41 selfloop transitions, 3 changer transitions 2/46 dead transitions. [2023-01-27 20:06:29,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 260 flow [2023-01-27 20:06:29,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 20:06:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 20:06:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 823 transitions. [2023-01-27 20:06:29,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4207566462167689 [2023-01-27 20:06:29,121 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 823 transitions. [2023-01-27 20:06:29,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 823 transitions. [2023-01-27 20:06:29,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:06:29,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 823 transitions. [2023-01-27 20:06:29,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:29,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:29,126 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:29,126 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 128 flow. Second operand 4 states and 823 transitions. [2023-01-27 20:06:29,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 260 flow [2023-01-27 20:06:29,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 244 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 20:06:29,129 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 132 flow [2023-01-27 20:06:29,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-01-27 20:06:29,130 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2023-01-27 20:06:29,130 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 132 flow [2023-01-27 20:06:29,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:29,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:29,131 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:29,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 20:06:29,335 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,SelfDestructingSolverStorable2 [2023-01-27 20:06:29,336 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:29,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:29,336 INFO L85 PathProgramCache]: Analyzing trace with hash 637732292, now seen corresponding path program 3 times [2023-01-27 20:06:29,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:29,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934764909] [2023-01-27 20:06:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:29,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 20:06:29,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:29,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934764909] [2023-01-27 20:06:29,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934764909] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:06:29,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158030663] [2023-01-27 20:06:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:06:29,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:29,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:06:29,553 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 20:06:29,578 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 20:06:29,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-27 20:06:29,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:06:29,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 20:06:29,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:06:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-01-27 20:06:29,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:06:29,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158030663] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:06:29,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:06:29,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-01-27 20:06:29,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37768498] [2023-01-27 20:06:29,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:06:29,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 20:06:29,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:06:29,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 20:06:29,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:06:29,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 489 [2023-01-27 20:06:29,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:29,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:06:29,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 489 [2023-01-27 20:06:29,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:06:29,900 INFO L130 PetriNetUnfolder]: 136/259 cut-off events. [2023-01-27 20:06:29,900 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 20:06:29,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 259 events. 136/259 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 831 event pairs, 60 based on Foata normal form. 2/224 useless extension candidates. Maximal degree in co-relation 602. Up to 176 conditions per place. [2023-01-27 20:06:29,902 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 48 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-01-27 20:06:29,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 304 flow [2023-01-27 20:06:29,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 20:06:29,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 20:06:29,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 822 transitions. [2023-01-27 20:06:29,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42024539877300615 [2023-01-27 20:06:29,904 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 822 transitions. [2023-01-27 20:06:29,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 822 transitions. [2023-01-27 20:06:29,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:06:29,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 822 transitions. [2023-01-27 20:06:29,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.5) internal successors, (822), 4 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:29,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:29,910 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:29,910 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 132 flow. Second operand 4 states and 822 transitions. [2023-01-27 20:06:29,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 304 flow [2023-01-27 20:06:29,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 20:06:29,915 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 150 flow [2023-01-27 20:06:29,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-01-27 20:06:29,916 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2023-01-27 20:06:29,917 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 150 flow [2023-01-27 20:06:29,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:29,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:29,917 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:29,965 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 20:06:30,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:30,123 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:30,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:30,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1056425402, now seen corresponding path program 4 times [2023-01-27 20:06:30,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:30,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487347807] [2023-01-27 20:06:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:30,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 20:06:30,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:30,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487347807] [2023-01-27 20:06:30,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487347807] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:06:30,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338074495] [2023-01-27 20:06:30,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:06:30,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:30,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:06:30,323 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 20:06:30,325 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 20:06:30,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:06:30,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:06:30,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 20:06:30,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:06:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 20:06:30,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:06:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 20:06:30,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338074495] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:06:30,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:06:30,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 20:06:30,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948240727] [2023-01-27 20:06:30,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:06:30,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 20:06:30,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:06:30,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 20:06:30,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-01-27 20:06:30,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 489 [2023-01-27 20:06:30,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 189.15384615384616) internal successors, (2459), 13 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:30,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:06:30,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 489 [2023-01-27 20:06:30,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:06:30,597 INFO L130 PetriNetUnfolder]: 136/261 cut-off events. [2023-01-27 20:06:30,598 INFO L131 PetriNetUnfolder]: For 230/230 co-relation queries the response was YES. [2023-01-27 20:06:30,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 261 events. 136/261 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 791 event pairs, 104 based on Foata normal form. 1/243 useless extension candidates. Maximal degree in co-relation 722. Up to 252 conditions per place. [2023-01-27 20:06:30,599 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 22 selfloop transitions, 12 changer transitions 0/34 dead transitions. [2023-01-27 20:06:30,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 230 flow [2023-01-27 20:06:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:06:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:06:30,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1341 transitions. [2023-01-27 20:06:30,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39176161262050835 [2023-01-27 20:06:30,602 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1341 transitions. [2023-01-27 20:06:30,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1341 transitions. [2023-01-27 20:06:30,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:06:30,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1341 transitions. [2023-01-27 20:06:30,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 191.57142857142858) internal successors, (1341), 7 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:30,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 489.0) internal successors, (3912), 8 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:30,608 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 489.0) internal successors, (3912), 8 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:30,608 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 150 flow. Second operand 7 states and 1341 transitions. [2023-01-27 20:06:30,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 230 flow [2023-01-27 20:06:30,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 226 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 20:06:30,611 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 192 flow [2023-01-27 20:06:30,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-01-27 20:06:30,612 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2023-01-27 20:06:30,612 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 192 flow [2023-01-27 20:06:30,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 189.15384615384616) internal successors, (2459), 13 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:30,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:30,613 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:30,620 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 20:06:30,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:30,818 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:30,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:30,819 INFO L85 PathProgramCache]: Analyzing trace with hash -871821335, now seen corresponding path program 5 times [2023-01-27 20:06:30,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:30,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152778056] [2023-01-27 20:06:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:30,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:06:31,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:31,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152778056] [2023-01-27 20:06:31,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152778056] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:06:31,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:06:31,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 20:06:31,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963563923] [2023-01-27 20:06:31,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:06:31,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 20:06:31,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:06:31,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 20:06:31,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 20:06:31,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 489 [2023-01-27 20:06:31,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:31,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:06:31,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 489 [2023-01-27 20:06:31,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:06:31,269 INFO L130 PetriNetUnfolder]: 158/299 cut-off events. [2023-01-27 20:06:31,269 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-01-27 20:06:31,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 856 conditions, 299 events. 158/299 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1083 event pairs, 18 based on Foata normal form. 16/297 useless extension candidates. Maximal degree in co-relation 778. Up to 246 conditions per place. [2023-01-27 20:06:31,271 INFO L137 encePairwiseOnDemand]: 483/489 looper letters, 45 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-01-27 20:06:31,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 352 flow [2023-01-27 20:06:31,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 20:06:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 20:06:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 818 transitions. [2023-01-27 20:06:31,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418200408997955 [2023-01-27 20:06:31,273 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 818 transitions. [2023-01-27 20:06:31,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 818 transitions. [2023-01-27 20:06:31,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:06:31,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 818 transitions. [2023-01-27 20:06:31,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:31,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:31,287 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:31,287 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 192 flow. Second operand 4 states and 818 transitions. [2023-01-27 20:06:31,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 352 flow [2023-01-27 20:06:31,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 328 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-01-27 20:06:31,290 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 199 flow [2023-01-27 20:06:31,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-01-27 20:06:31,291 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 21 predicate places. [2023-01-27 20:06:31,292 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 199 flow [2023-01-27 20:06:31,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:31,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:31,292 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:31,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 20:06:31,293 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:31,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash -29914819, now seen corresponding path program 6 times [2023-01-27 20:06:31,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:31,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460361507] [2023-01-27 20:06:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:31,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:06:31,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:31,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460361507] [2023-01-27 20:06:31,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460361507] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:06:31,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:06:31,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 20:06:31,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630853935] [2023-01-27 20:06:31,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:06:31,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 20:06:31,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:06:31,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 20:06:31,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 20:06:31,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 489 [2023-01-27 20:06:31,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:31,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:06:31,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 489 [2023-01-27 20:06:31,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:06:31,721 INFO L130 PetriNetUnfolder]: 160/299 cut-off events. [2023-01-27 20:06:31,721 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-01-27 20:06:31,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 299 events. 160/299 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 976 event pairs, 34 based on Foata normal form. 8/285 useless extension candidates. Maximal degree in co-relation 872. Up to 206 conditions per place. [2023-01-27 20:06:31,722 INFO L137 encePairwiseOnDemand]: 483/489 looper letters, 45 selfloop transitions, 6 changer transitions 1/52 dead transitions. [2023-01-27 20:06:31,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 367 flow [2023-01-27 20:06:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 20:06:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 20:06:31,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 817 transitions. [2023-01-27 20:06:31,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176891615541922 [2023-01-27 20:06:31,724 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 817 transitions. [2023-01-27 20:06:31,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 817 transitions. [2023-01-27 20:06:31,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:06:31,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 817 transitions. [2023-01-27 20:06:31,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:31,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:31,728 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:31,728 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 199 flow. Second operand 4 states and 817 transitions. [2023-01-27 20:06:31,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 367 flow [2023-01-27 20:06:31,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 20:06:31,730 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 234 flow [2023-01-27 20:06:31,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-01-27 20:06:31,731 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 25 predicate places. [2023-01-27 20:06:31,731 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 234 flow [2023-01-27 20:06:31,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:31,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:31,731 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:31,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 20:06:31,732 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:31,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:31,732 INFO L85 PathProgramCache]: Analyzing trace with hash 537168199, now seen corresponding path program 1 times [2023-01-27 20:06:31,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:31,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249586223] [2023-01-27 20:06:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:31,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-01-27 20:06:31,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:31,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249586223] [2023-01-27 20:06:31,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249586223] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:06:31,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:06:31,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 20:06:31,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916546520] [2023-01-27 20:06:31,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:06:31,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 20:06:31,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:06:31,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 20:06:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 20:06:31,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 489 [2023-01-27 20:06:31,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 234 flow. Second operand has 4 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:31,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:06:31,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 489 [2023-01-27 20:06:31,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:06:32,081 INFO L130 PetriNetUnfolder]: 145/270 cut-off events. [2023-01-27 20:06:32,082 INFO L131 PetriNetUnfolder]: For 591/591 co-relation queries the response was YES. [2023-01-27 20:06:32,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 270 events. 145/270 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 847 event pairs, 54 based on Foata normal form. 6/258 useless extension candidates. Maximal degree in co-relation 847. Up to 182 conditions per place. [2023-01-27 20:06:32,083 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 46 selfloop transitions, 6 changer transitions 3/55 dead transitions. [2023-01-27 20:06:32,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 415 flow [2023-01-27 20:06:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 20:06:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 20:06:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 821 transitions. [2023-01-27 20:06:32,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41973415132924335 [2023-01-27 20:06:32,087 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 821 transitions. [2023-01-27 20:06:32,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 821 transitions. [2023-01-27 20:06:32,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:06:32,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 821 transitions. [2023-01-27 20:06:32,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:32,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:32,091 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:32,091 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 234 flow. Second operand 4 states and 821 transitions. [2023-01-27 20:06:32,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 415 flow [2023-01-27 20:06:32,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 408 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 20:06:32,093 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 257 flow [2023-01-27 20:06:32,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-01-27 20:06:32,094 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2023-01-27 20:06:32,095 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 257 flow [2023-01-27 20:06:32,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:32,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:32,095 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:32,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 20:06:32,095 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:32,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:32,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1727705847, now seen corresponding path program 1 times [2023-01-27 20:06:32,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:32,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243288195] [2023-01-27 20:06:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:32,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-01-27 20:06:32,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:32,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243288195] [2023-01-27 20:06:32,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243288195] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:06:32,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:06:32,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 20:06:32,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365133623] [2023-01-27 20:06:32,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:06:32,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 20:06:32,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:06:32,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 20:06:32,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 20:06:32,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 489 [2023-01-27 20:06:32,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:32,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:06:32,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 489 [2023-01-27 20:06:32,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:06:32,350 INFO L130 PetriNetUnfolder]: 125/230 cut-off events. [2023-01-27 20:06:32,350 INFO L131 PetriNetUnfolder]: For 663/663 co-relation queries the response was YES. [2023-01-27 20:06:32,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 230 events. 125/230 cut-off events. For 663/663 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 639 event pairs, 51 based on Foata normal form. 12/224 useless extension candidates. Maximal degree in co-relation 757. Up to 177 conditions per place. [2023-01-27 20:06:32,351 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 47 selfloop transitions, 7 changer transitions 1/55 dead transitions. [2023-01-27 20:06:32,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 439 flow [2023-01-27 20:06:32,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 20:06:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 20:06:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 821 transitions. [2023-01-27 20:06:32,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41973415132924335 [2023-01-27 20:06:32,354 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 821 transitions. [2023-01-27 20:06:32,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 821 transitions. [2023-01-27 20:06:32,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:06:32,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 821 transitions. [2023-01-27 20:06:32,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:32,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:32,358 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:32,358 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 257 flow. Second operand 4 states and 821 transitions. [2023-01-27 20:06:32,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 439 flow [2023-01-27 20:06:32,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 413 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-01-27 20:06:32,361 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 270 flow [2023-01-27 20:06:32,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-01-27 20:06:32,361 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2023-01-27 20:06:32,361 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 270 flow [2023-01-27 20:06:32,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:32,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:32,362 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:32,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 20:06:32,362 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:32,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:32,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1304321571, now seen corresponding path program 1 times [2023-01-27 20:06:32,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:32,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422650281] [2023-01-27 20:06:32,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:32,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:06:33,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:33,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422650281] [2023-01-27 20:06:33,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422650281] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:06:33,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503609936] [2023-01-27 20:06:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:33,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:33,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:06:33,986 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 20:06:34,025 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 20:06:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:34,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:06:34,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:06:34,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:06:34,468 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 27 treesize of output 19 [2023-01-27 20:06:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:06:34,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:06:35,506 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:06:35,507 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 42 treesize of output 50 [2023-01-27 20:06:35,558 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:06:35,558 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 34 treesize of output 1 [2023-01-27 20:06:35,566 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:06:35,566 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 34 treesize of output 1 [2023-01-27 20:06:35,585 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:06:35,586 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 34 treesize of output 1 [2023-01-27 20:06:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:06:35,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503609936] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:06:35,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:06:35,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-01-27 20:06:35,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785807170] [2023-01-27 20:06:35,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:06:35,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 20:06:35,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:06:35,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 20:06:35,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:06:35,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-27 20:06:35,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 270 flow. Second operand has 24 states, 24 states have (on average 162.04166666666666) internal successors, (3889), 24 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:35,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:06:35,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-27 20:06:35,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:06:36,921 INFO L130 PetriNetUnfolder]: 233/427 cut-off events. [2023-01-27 20:06:36,921 INFO L131 PetriNetUnfolder]: For 1029/1029 co-relation queries the response was YES. [2023-01-27 20:06:36,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 427 events. 233/427 cut-off events. For 1029/1029 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1621 event pairs, 12 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 1404. Up to 150 conditions per place. [2023-01-27 20:06:36,923 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 71 selfloop transitions, 26 changer transitions 14/111 dead transitions. [2023-01-27 20:06:36,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 111 transitions, 796 flow [2023-01-27 20:06:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:06:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:06:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2490 transitions. [2023-01-27 20:06:36,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3394683026584867 [2023-01-27 20:06:36,929 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2490 transitions. [2023-01-27 20:06:36,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2490 transitions. [2023-01-27 20:06:36,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:06:36,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2490 transitions. [2023-01-27 20:06:36,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.0) internal successors, (2490), 15 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:36,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:36,974 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:36,974 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 270 flow. Second operand 15 states and 2490 transitions. [2023-01-27 20:06:36,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 111 transitions, 796 flow [2023-01-27 20:06:36,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 111 transitions, 744 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-01-27 20:06:36,978 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 451 flow [2023-01-27 20:06:36,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=451, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2023-01-27 20:06:36,979 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 48 predicate places. [2023-01-27 20:06:36,979 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 451 flow [2023-01-27 20:06:36,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 162.04166666666666) internal successors, (3889), 24 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:36,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:36,980 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:36,992 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 20:06:37,185 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,SelfDestructingSolverStorable9 [2023-01-27 20:06:37,186 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:37,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:37,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1278507897, now seen corresponding path program 2 times [2023-01-27 20:06:37,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:37,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248972340] [2023-01-27 20:06:37,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:37,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:06:38,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:38,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248972340] [2023-01-27 20:06:38,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248972340] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:06:38,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826790416] [2023-01-27 20:06:38,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:06:38,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:38,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:06:38,497 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 20:06:38,517 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 20:06:38,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:06:38,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:06:38,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:06:38,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:06:38,816 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:06:38,816 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 27 treesize of output 19 [2023-01-27 20:06:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:06:38,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:06:39,457 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-01-27 20:06:39,457 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 185 treesize of output 103 [2023-01-27 20:06:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:06:39,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826790416] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:06:39,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:06:39,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-01-27 20:06:39,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420130364] [2023-01-27 20:06:39,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:06:39,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 20:06:39,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:06:39,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 20:06:39,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:06:39,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-27 20:06:39,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 451 flow. Second operand has 24 states, 24 states have (on average 163.04166666666666) internal successors, (3913), 24 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:39,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:06:39,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-27 20:06:39,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:06:40,645 INFO L130 PetriNetUnfolder]: 268/482 cut-off events. [2023-01-27 20:06:40,646 INFO L131 PetriNetUnfolder]: For 1693/1693 co-relation queries the response was YES. [2023-01-27 20:06:40,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 482 events. 268/482 cut-off events. For 1693/1693 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1861 event pairs, 34 based on Foata normal form. 1/483 useless extension candidates. Maximal degree in co-relation 1958. Up to 327 conditions per place. [2023-01-27 20:06:40,650 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 64 selfloop transitions, 33 changer transitions 4/101 dead transitions. [2023-01-27 20:06:40,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 101 transitions, 891 flow [2023-01-27 20:06:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:06:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:06:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2322 transitions. [2023-01-27 20:06:40,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33917616126205086 [2023-01-27 20:06:40,669 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2322 transitions. [2023-01-27 20:06:40,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2322 transitions. [2023-01-27 20:06:40,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:06:40,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2322 transitions. [2023-01-27 20:06:40,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 165.85714285714286) internal successors, (2322), 14 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:40,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:40,680 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:40,680 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 451 flow. Second operand 14 states and 2322 transitions. [2023-01-27 20:06:40,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 101 transitions, 891 flow [2023-01-27 20:06:40,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 827 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-01-27 20:06:40,698 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 645 flow [2023-01-27 20:06:40,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=645, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-01-27 20:06:40,699 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 59 predicate places. [2023-01-27 20:06:40,699 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 645 flow [2023-01-27 20:06:40,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 163.04166666666666) internal successors, (3913), 24 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:40,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:40,700 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:40,729 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 20:06:40,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:40,906 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:40,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:40,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1488168775, now seen corresponding path program 3 times [2023-01-27 20:06:40,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:40,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661306763] [2023-01-27 20:06:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:40,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 20:06:42,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:42,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661306763] [2023-01-27 20:06:42,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661306763] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:06:42,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109223386] [2023-01-27 20:06:42,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:06:42,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:42,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:06:42,529 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 20:06:42,568 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 20:06:42,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:06:42,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:06:42,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:06:42,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:06:43,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:06:43,060 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 27 treesize of output 19 [2023-01-27 20:06:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:06:43,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:06:44,256 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:06:44,257 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 50 treesize of output 50 [2023-01-27 20:06:44,300 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:06:44,300 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 34 treesize of output 1 [2023-01-27 20:06:44,304 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:06:44,304 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 34 treesize of output 1 [2023-01-27 20:06:44,311 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:06:44,311 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 34 treesize of output 1 [2023-01-27 20:06:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:06:44,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109223386] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:06:44,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:06:44,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 30 [2023-01-27 20:06:44,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358154207] [2023-01-27 20:06:44,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:06:44,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 20:06:44,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:06:44,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 20:06:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2023-01-27 20:06:44,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 489 [2023-01-27 20:06:44,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 645 flow. Second operand has 31 states, 31 states have (on average 136.90322580645162) internal successors, (4244), 31 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:44,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:06:44,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 489 [2023-01-27 20:06:44,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:06:46,612 INFO L130 PetriNetUnfolder]: 597/1061 cut-off events. [2023-01-27 20:06:46,612 INFO L131 PetriNetUnfolder]: For 3820/3820 co-relation queries the response was YES. [2023-01-27 20:06:46,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4645 conditions, 1061 events. 597/1061 cut-off events. For 3820/3820 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5128 event pairs, 76 based on Foata normal form. 2/1063 useless extension candidates. Maximal degree in co-relation 4550. Up to 364 conditions per place. [2023-01-27 20:06:46,627 INFO L137 encePairwiseOnDemand]: 474/489 looper letters, 127 selfloop transitions, 84 changer transitions 4/215 dead transitions. [2023-01-27 20:06:46,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 215 transitions, 2100 flow [2023-01-27 20:06:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 20:06:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 20:06:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3911 transitions. [2023-01-27 20:06:46,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28564125036517674 [2023-01-27 20:06:46,648 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3911 transitions. [2023-01-27 20:06:46,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3911 transitions. [2023-01-27 20:06:46,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:06:46,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3911 transitions. [2023-01-27 20:06:46,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 139.67857142857142) internal successors, (3911), 28 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:46,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:46,690 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:46,691 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 645 flow. Second operand 28 states and 3911 transitions. [2023-01-27 20:06:46,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 215 transitions, 2100 flow [2023-01-27 20:06:46,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 215 transitions, 1914 flow, removed 66 selfloop flow, removed 5 redundant places. [2023-01-27 20:06:46,712 INFO L231 Difference]: Finished difference. Result has 116 places, 127 transitions, 1312 flow [2023-01-27 20:06:46,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1312, PETRI_PLACES=116, PETRI_TRANSITIONS=127} [2023-01-27 20:06:46,716 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 93 predicate places. [2023-01-27 20:06:46,716 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 127 transitions, 1312 flow [2023-01-27 20:06:46,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 136.90322580645162) internal successors, (4244), 31 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:46,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:46,717 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:46,748 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 20:06:46,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:46,927 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:46,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:46,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1380522979, now seen corresponding path program 4 times [2023-01-27 20:06:46,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:46,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073817543] [2023-01-27 20:06:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:46,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:06:47,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:47,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073817543] [2023-01-27 20:06:47,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073817543] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:06:47,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428579396] [2023-01-27 20:06:47,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:06:47,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:47,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:06:47,849 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 20:06:47,924 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 20:06:48,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:06:48,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:06:48,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:06:48,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:06:48,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:06:48,373 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 27 treesize of output 23 [2023-01-27 20:06:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:06:48,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:07:25,127 WARN L222 SmtUtils]: Spent 36.14s on a formula simplification. DAG size of input: 44 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 20:07:25,298 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:07:25,298 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 58 treesize of output 58 [2023-01-27 20:07:25,359 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:07:25,360 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 19 treesize of output 11 [2023-01-27 20:07:25,365 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-27 20:07:25,383 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:07:25,383 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 58 treesize of output 1 [2023-01-27 20:07:25,389 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:07:25,389 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 58 treesize of output 1 [2023-01-27 20:07:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:25,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428579396] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:07:25,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:07:25,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 26 [2023-01-27 20:07:25,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440725751] [2023-01-27 20:07:25,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:07:25,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:07:25,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:07:25,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:07:25,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:07:25,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-27 20:07:25,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 127 transitions, 1312 flow. Second operand has 27 states, 27 states have (on average 163.14814814814815) internal successors, (4405), 27 states have internal predecessors, (4405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:25,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:07:25,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-27 20:07:25,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:07:26,511 INFO L130 PetriNetUnfolder]: 663/1177 cut-off events. [2023-01-27 20:07:26,511 INFO L131 PetriNetUnfolder]: For 4665/4665 co-relation queries the response was YES. [2023-01-27 20:07:26,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5456 conditions, 1177 events. 663/1177 cut-off events. For 4665/4665 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5827 event pairs, 110 based on Foata normal form. 2/1159 useless extension candidates. Maximal degree in co-relation 5335. Up to 822 conditions per place. [2023-01-27 20:07:26,520 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 94 selfloop transitions, 64 changer transitions 3/161 dead transitions. [2023-01-27 20:07:26,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 161 transitions, 1844 flow [2023-01-27 20:07:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 20:07:26,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 20:07:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1997 transitions. [2023-01-27 20:07:26,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3403203817314247 [2023-01-27 20:07:26,525 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1997 transitions. [2023-01-27 20:07:26,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1997 transitions. [2023-01-27 20:07:26,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:07:26,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1997 transitions. [2023-01-27 20:07:26,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 166.41666666666666) internal successors, (1997), 12 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:26,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:26,534 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:26,534 INFO L175 Difference]: Start difference. First operand has 116 places, 127 transitions, 1312 flow. Second operand 12 states and 1997 transitions. [2023-01-27 20:07:26,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 161 transitions, 1844 flow [2023-01-27 20:07:26,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 161 transitions, 1712 flow, removed 13 selfloop flow, removed 12 redundant places. [2023-01-27 20:07:26,553 INFO L231 Difference]: Finished difference. Result has 119 places, 139 transitions, 1486 flow [2023-01-27 20:07:26,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1486, PETRI_PLACES=119, PETRI_TRANSITIONS=139} [2023-01-27 20:07:26,553 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 96 predicate places. [2023-01-27 20:07:26,554 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 139 transitions, 1486 flow [2023-01-27 20:07:26,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 163.14814814814815) internal successors, (4405), 27 states have internal predecessors, (4405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:26,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:07:26,555 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:07:26,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 20:07:26,760 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,SelfDestructingSolverStorable12 [2023-01-27 20:07:26,760 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:07:26,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:07:26,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1922354213, now seen corresponding path program 5 times [2023-01-27 20:07:26,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:07:26,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540711198] [2023-01-27 20:07:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:07:26,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:07:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:07:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 20:07:28,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:07:28,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540711198] [2023-01-27 20:07:28,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540711198] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:07:28,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877381123] [2023-01-27 20:07:28,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:07:28,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:07:28,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:07:28,734 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:07:28,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 20:07:29,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:07:29,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:07:29,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:07:29,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:07:29,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:07:29,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2023-01-27 20:07:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:29,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:07:30,109 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:07:30,109 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 50 treesize of output 50 [2023-01-27 20:07:30,144 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:07:30,144 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 34 treesize of output 1 [2023-01-27 20:07:30,162 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:07:30,162 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 34 treesize of output 1 [2023-01-27 20:07:30,166 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:07:30,166 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 34 treesize of output 1 [2023-01-27 20:07:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:30,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877381123] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:07:30,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:07:30,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 8] total 29 [2023-01-27 20:07:30,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218508237] [2023-01-27 20:07:30,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:07:30,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 20:07:30,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:07:30,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 20:07:30,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2023-01-27 20:07:30,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 489 [2023-01-27 20:07:30,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 139 transitions, 1486 flow. Second operand has 30 states, 30 states have (on average 140.93333333333334) internal successors, (4228), 30 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:30,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:07:30,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 489 [2023-01-27 20:07:30,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:07:31,379 INFO L130 PetriNetUnfolder]: 773/1371 cut-off events. [2023-01-27 20:07:31,379 INFO L131 PetriNetUnfolder]: For 6859/6859 co-relation queries the response was YES. [2023-01-27 20:07:31,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6824 conditions, 1371 events. 773/1371 cut-off events. For 6859/6859 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7182 event pairs, 135 based on Foata normal form. 4/1355 useless extension candidates. Maximal degree in co-relation 6711. Up to 932 conditions per place. [2023-01-27 20:07:31,390 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 103 selfloop transitions, 78 changer transitions 3/184 dead transitions. [2023-01-27 20:07:31,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 184 transitions, 2145 flow [2023-01-27 20:07:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:07:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:07:31,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2154 transitions. [2023-01-27 20:07:31,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2936605316973415 [2023-01-27 20:07:31,392 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2154 transitions. [2023-01-27 20:07:31,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2154 transitions. [2023-01-27 20:07:31,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:07:31,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2154 transitions. [2023-01-27 20:07:31,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 143.6) internal successors, (2154), 15 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:31,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:31,418 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:31,418 INFO L175 Difference]: Start difference. First operand has 119 places, 139 transitions, 1486 flow. Second operand 15 states and 2154 transitions. [2023-01-27 20:07:31,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 184 transitions, 2145 flow [2023-01-27 20:07:31,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 184 transitions, 2011 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-01-27 20:07:31,487 INFO L231 Difference]: Finished difference. Result has 132 places, 155 transitions, 1780 flow [2023-01-27 20:07:31,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1780, PETRI_PLACES=132, PETRI_TRANSITIONS=155} [2023-01-27 20:07:31,488 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 109 predicate places. [2023-01-27 20:07:31,488 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 155 transitions, 1780 flow [2023-01-27 20:07:31,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 140.93333333333334) internal successors, (4228), 30 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:31,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:07:31,489 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:07:31,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 20:07:31,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-27 20:07:31,695 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:07:31,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:07:31,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1976346153, now seen corresponding path program 6 times [2023-01-27 20:07:31,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:07:31,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788372595] [2023-01-27 20:07:31,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:07:31,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:07:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:07:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:32,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:07:32,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788372595] [2023-01-27 20:07:32,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788372595] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:07:32,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534043784] [2023-01-27 20:07:32,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:07:32,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:07:32,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:07:32,749 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:07:32,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 20:07:33,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:07:33,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:07:33,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:07:33,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:07:33,242 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:07:33,243 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 27 treesize of output 19 [2023-01-27 20:07:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:33,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:07:34,071 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:07:34,071 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 50 treesize of output 50 [2023-01-27 20:07:34,200 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:07:34,200 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 34 treesize of output 1 [2023-01-27 20:07:34,210 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:07:34,210 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 34 treesize of output 1 [2023-01-27 20:07:34,213 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:07:34,214 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 34 treesize of output 1 [2023-01-27 20:07:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:34,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534043784] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:07:34,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:07:34,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-27 20:07:34,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42795965] [2023-01-27 20:07:34,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:07:34,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 20:07:34,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:07:34,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 20:07:34,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:07:34,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-27 20:07:34,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 155 transitions, 1780 flow. Second operand has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:34,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:07:34,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-27 20:07:34,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:07:35,700 INFO L130 PetriNetUnfolder]: 785/1401 cut-off events. [2023-01-27 20:07:35,700 INFO L131 PetriNetUnfolder]: For 8388/8388 co-relation queries the response was YES. [2023-01-27 20:07:35,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7573 conditions, 1401 events. 785/1401 cut-off events. For 8388/8388 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7407 event pairs, 138 based on Foata normal form. 2/1383 useless extension candidates. Maximal degree in co-relation 7451. Up to 1016 conditions per place. [2023-01-27 20:07:35,722 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 115 selfloop transitions, 73 changer transitions 4/192 dead transitions. [2023-01-27 20:07:35,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 192 transitions, 2402 flow [2023-01-27 20:07:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:07:35,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:07:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2324 transitions. [2023-01-27 20:07:35,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3394683026584867 [2023-01-27 20:07:35,735 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2324 transitions. [2023-01-27 20:07:35,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2324 transitions. [2023-01-27 20:07:35,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:07:35,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2324 transitions. [2023-01-27 20:07:35,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 166.0) internal successors, (2324), 14 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:35,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:35,756 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:35,756 INFO L175 Difference]: Start difference. First operand has 132 places, 155 transitions, 1780 flow. Second operand 14 states and 2324 transitions. [2023-01-27 20:07:35,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 192 transitions, 2402 flow [2023-01-27 20:07:35,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 192 transitions, 2261 flow, removed 63 selfloop flow, removed 4 redundant places. [2023-01-27 20:07:35,797 INFO L231 Difference]: Finished difference. Result has 144 places, 161 transitions, 1912 flow [2023-01-27 20:07:35,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1912, PETRI_PLACES=144, PETRI_TRANSITIONS=161} [2023-01-27 20:07:35,804 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 121 predicate places. [2023-01-27 20:07:35,805 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 161 transitions, 1912 flow [2023-01-27 20:07:35,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:35,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:07:35,806 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:07:35,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 20:07:36,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 20:07:36,011 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:07:36,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:07:36,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1457835971, now seen corresponding path program 7 times [2023-01-27 20:07:36,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:07:36,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990345438] [2023-01-27 20:07:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:07:36,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:07:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:07:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:37,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:07:37,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990345438] [2023-01-27 20:07:37,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990345438] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:07:37,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125385425] [2023-01-27 20:07:37,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:07:37,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:07:37,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:07:37,101 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:07:37,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 20:07:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:07:37,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:07:37,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:07:37,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:07:37,414 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 27 treesize of output 19 [2023-01-27 20:07:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:37,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:07:38,002 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-01-27 20:07:38,003 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 165 treesize of output 99 [2023-01-27 20:07:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:38,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125385425] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:07:38,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:07:38,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-01-27 20:07:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713097089] [2023-01-27 20:07:38,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:07:38,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 20:07:38,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:07:38,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 20:07:38,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:07:38,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-27 20:07:38,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 161 transitions, 1912 flow. Second operand has 24 states, 24 states have (on average 162.04166666666666) internal successors, (3889), 24 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:38,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:07:38,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-27 20:07:38,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:07:39,384 INFO L130 PetriNetUnfolder]: 775/1409 cut-off events. [2023-01-27 20:07:39,384 INFO L131 PetriNetUnfolder]: For 8753/8753 co-relation queries the response was YES. [2023-01-27 20:07:39,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7611 conditions, 1409 events. 775/1409 cut-off events. For 8753/8753 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7619 event pairs, 152 based on Foata normal form. 14/1403 useless extension candidates. Maximal degree in co-relation 7489. Up to 1060 conditions per place. [2023-01-27 20:07:39,411 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 104 selfloop transitions, 70 changer transitions 6/180 dead transitions. [2023-01-27 20:07:39,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 180 transitions, 2378 flow [2023-01-27 20:07:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:07:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:07:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2144 transitions. [2023-01-27 20:07:39,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33726600597766243 [2023-01-27 20:07:39,414 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2144 transitions. [2023-01-27 20:07:39,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2144 transitions. [2023-01-27 20:07:39,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:07:39,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2144 transitions. [2023-01-27 20:07:39,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 164.92307692307693) internal successors, (2144), 13 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:39,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:39,431 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:39,431 INFO L175 Difference]: Start difference. First operand has 144 places, 161 transitions, 1912 flow. Second operand 13 states and 2144 transitions. [2023-01-27 20:07:39,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 180 transitions, 2378 flow [2023-01-27 20:07:39,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 180 transitions, 2278 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-01-27 20:07:39,488 INFO L231 Difference]: Finished difference. Result has 150 places, 162 transitions, 1985 flow [2023-01-27 20:07:39,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1985, PETRI_PLACES=150, PETRI_TRANSITIONS=162} [2023-01-27 20:07:39,489 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 127 predicate places. [2023-01-27 20:07:39,489 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 162 transitions, 1985 flow [2023-01-27 20:07:39,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 162.04166666666666) internal successors, (3889), 24 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:39,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:07:39,490 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:07:39,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 20:07:39,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-27 20:07:39,690 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:07:39,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:07:39,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2030000009, now seen corresponding path program 8 times [2023-01-27 20:07:39,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:07:39,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156091443] [2023-01-27 20:07:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:07:39,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:07:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:07:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:40,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:07:40,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156091443] [2023-01-27 20:07:40,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156091443] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:07:40,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547328702] [2023-01-27 20:07:40,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:07:40,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:07:40,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:07:40,633 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:07:40,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 20:07:40,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:07:40,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:07:40,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:07:40,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:07:41,019 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:07:41,019 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 27 treesize of output 19 [2023-01-27 20:07:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:41,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:07:41,550 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:07:41,550 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 58 treesize of output 58 [2023-01-27 20:07:41,585 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:07:41,585 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 19 treesize of output 11 [2023-01-27 20:07:41,595 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:07:41,596 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 58 treesize of output 1 [2023-01-27 20:07:41,601 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:07:41,602 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 58 treesize of output 1 [2023-01-27 20:07:41,603 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-27 20:07:41,610 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:07:41,612 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 58 treesize of output 1 [2023-01-27 20:07:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:41,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547328702] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:07:41,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:07:41,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-27 20:07:41,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197384676] [2023-01-27 20:07:41,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:07:41,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 20:07:41,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:07:41,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 20:07:41,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:07:41,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-27 20:07:41,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 162 transitions, 1985 flow. Second operand has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:41,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:07:41,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-27 20:07:41,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:07:42,882 INFO L130 PetriNetUnfolder]: 807/1457 cut-off events. [2023-01-27 20:07:42,883 INFO L131 PetriNetUnfolder]: For 9801/9801 co-relation queries the response was YES. [2023-01-27 20:07:42,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8273 conditions, 1457 events. 807/1457 cut-off events. For 9801/9801 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7893 event pairs, 166 based on Foata normal form. 2/1439 useless extension candidates. Maximal degree in co-relation 8149. Up to 1124 conditions per place. [2023-01-27 20:07:42,918 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 120 selfloop transitions, 65 changer transitions 2/187 dead transitions. [2023-01-27 20:07:42,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 187 transitions, 2556 flow [2023-01-27 20:07:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 20:07:42,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 20:07:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1990 transitions. [2023-01-27 20:07:42,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3391274710293115 [2023-01-27 20:07:42,935 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1990 transitions. [2023-01-27 20:07:42,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1990 transitions. [2023-01-27 20:07:42,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:07:42,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1990 transitions. [2023-01-27 20:07:42,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 165.83333333333334) internal successors, (1990), 12 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:42,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:42,942 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:42,942 INFO L175 Difference]: Start difference. First operand has 150 places, 162 transitions, 1985 flow. Second operand 12 states and 1990 transitions. [2023-01-27 20:07:42,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 187 transitions, 2556 flow [2023-01-27 20:07:42,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 187 transitions, 2405 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-01-27 20:07:42,988 INFO L231 Difference]: Finished difference. Result has 152 places, 169 transitions, 2111 flow [2023-01-27 20:07:42,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2111, PETRI_PLACES=152, PETRI_TRANSITIONS=169} [2023-01-27 20:07:42,988 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 129 predicate places. [2023-01-27 20:07:42,988 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 169 transitions, 2111 flow [2023-01-27 20:07:42,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:42,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:07:42,989 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:07:43,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 20:07:43,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-27 20:07:43,209 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:07:43,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:07:43,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1391226607, now seen corresponding path program 9 times [2023-01-27 20:07:43,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:07:43,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266005233] [2023-01-27 20:07:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:07:43,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:07:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:07:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:44,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:07:44,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266005233] [2023-01-27 20:07:44,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266005233] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:07:44,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459235680] [2023-01-27 20:07:44,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:07:44,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:07:44,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:07:44,121 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:07:44,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 20:07:44,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:07:44,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:07:44,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:07:44,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:07:44,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:07:44,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2023-01-27 20:07:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:44,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:07:45,256 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:07:45,256 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 58 treesize of output 58 [2023-01-27 20:07:45,300 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:07:45,301 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 19 treesize of output 11 [2023-01-27 20:07:45,309 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:07:45,309 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 58 treesize of output 1 [2023-01-27 20:07:45,327 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:07:45,328 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 58 treesize of output 1 [2023-01-27 20:07:45,330 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-27 20:07:45,338 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:07:45,338 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 58 treesize of output 1 [2023-01-27 20:07:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:45,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459235680] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:07:45,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:07:45,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-01-27 20:07:45,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438275381] [2023-01-27 20:07:45,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:07:45,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 20:07:45,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:07:45,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 20:07:45,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:07:45,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-27 20:07:45,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 169 transitions, 2111 flow. Second operand has 22 states, 22 states have (on average 163.13636363636363) internal successors, (3589), 22 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:45,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:07:45,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-27 20:07:45,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:07:46,322 INFO L130 PetriNetUnfolder]: 819/1487 cut-off events. [2023-01-27 20:07:46,322 INFO L131 PetriNetUnfolder]: For 11128/11128 co-relation queries the response was YES. [2023-01-27 20:07:46,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8554 conditions, 1487 events. 819/1487 cut-off events. For 11128/11128 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8161 event pairs, 172 based on Foata normal form. 2/1469 useless extension candidates. Maximal degree in co-relation 8429. Up to 1102 conditions per place. [2023-01-27 20:07:46,341 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 121 selfloop transitions, 68 changer transitions 5/194 dead transitions. [2023-01-27 20:07:46,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 194 transitions, 2650 flow [2023-01-27 20:07:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:07:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:07:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2158 transitions. [2023-01-27 20:07:46,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3394683026584867 [2023-01-27 20:07:46,343 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2158 transitions. [2023-01-27 20:07:46,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2158 transitions. [2023-01-27 20:07:46,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:07:46,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2158 transitions. [2023-01-27 20:07:46,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 166.0) internal successors, (2158), 13 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:46,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:46,409 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:46,409 INFO L175 Difference]: Start difference. First operand has 152 places, 169 transitions, 2111 flow. Second operand 13 states and 2158 transitions. [2023-01-27 20:07:46,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 194 transitions, 2650 flow [2023-01-27 20:07:46,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 194 transitions, 2569 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-01-27 20:07:46,469 INFO L231 Difference]: Finished difference. Result has 160 places, 170 transitions, 2214 flow [2023-01-27 20:07:46,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2214, PETRI_PLACES=160, PETRI_TRANSITIONS=170} [2023-01-27 20:07:46,470 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 137 predicate places. [2023-01-27 20:07:46,470 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 170 transitions, 2214 flow [2023-01-27 20:07:46,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 163.13636363636363) internal successors, (3589), 22 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:46,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:07:46,471 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:07:46,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 20:07:46,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-27 20:07:46,677 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:07:46,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:07:46,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1193323809, now seen corresponding path program 10 times [2023-01-27 20:07:46,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:07:46,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108762310] [2023-01-27 20:07:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:07:46,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:07:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:07:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:47,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:07:47,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108762310] [2023-01-27 20:07:47,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108762310] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:07:47,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542331608] [2023-01-27 20:07:47,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:07:47,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:07:47,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:07:47,619 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:07:47,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 20:07:47,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:07:47,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:07:47,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:07:47,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:07:47,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:07:47,882 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 27 treesize of output 19 [2023-01-27 20:07:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:47,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:07:48,553 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:07:48,553 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 58 treesize of output 58 [2023-01-27 20:07:48,601 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:07:48,601 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 19 treesize of output 11 [2023-01-27 20:07:48,610 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:07:48,610 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 58 treesize of output 1 [2023-01-27 20:07:48,616 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:07:48,616 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 58 treesize of output 1 [2023-01-27 20:07:48,618 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-27 20:07:48,624 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:07:48,624 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 58 treesize of output 1 [2023-01-27 20:07:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:48,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542331608] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:07:48,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:07:48,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-27 20:07:48,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601268368] [2023-01-27 20:07:48,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:07:48,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 20:07:48,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:07:48,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 20:07:48,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:07:48,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-27 20:07:48,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 170 transitions, 2214 flow. Second operand has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:48,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:07:48,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-27 20:07:48,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:07:49,849 INFO L130 PetriNetUnfolder]: 871/1589 cut-off events. [2023-01-27 20:07:49,849 INFO L131 PetriNetUnfolder]: For 14009/14009 co-relation queries the response was YES. [2023-01-27 20:07:49,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9591 conditions, 1589 events. 871/1589 cut-off events. For 14009/14009 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8944 event pairs, 275 based on Foata normal form. 4/1569 useless extension candidates. Maximal degree in co-relation 9463. Up to 1242 conditions per place. [2023-01-27 20:07:49,902 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 159 selfloop transitions, 46 changer transitions 5/210 dead transitions. [2023-01-27 20:07:49,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 210 transitions, 3038 flow [2023-01-27 20:07:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 20:07:49,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 20:07:49,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1994 transitions. [2023-01-27 20:07:49,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3398091342876619 [2023-01-27 20:07:49,904 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1994 transitions. [2023-01-27 20:07:49,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1994 transitions. [2023-01-27 20:07:49,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:07:49,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1994 transitions. [2023-01-27 20:07:49,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 166.16666666666666) internal successors, (1994), 12 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:49,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:49,911 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:49,911 INFO L175 Difference]: Start difference. First operand has 160 places, 170 transitions, 2214 flow. Second operand 12 states and 1994 transitions. [2023-01-27 20:07:49,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 210 transitions, 3038 flow [2023-01-27 20:07:49,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 210 transitions, 2865 flow, removed 17 selfloop flow, removed 12 redundant places. [2023-01-27 20:07:50,002 INFO L231 Difference]: Finished difference. Result has 163 places, 184 transitions, 2406 flow [2023-01-27 20:07:50,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2406, PETRI_PLACES=163, PETRI_TRANSITIONS=184} [2023-01-27 20:07:50,002 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 140 predicate places. [2023-01-27 20:07:50,002 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 184 transitions, 2406 flow [2023-01-27 20:07:50,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:50,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:07:50,007 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:07:50,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 20:07:50,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:07:50,213 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:07:50,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:07:50,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1163402759, now seen corresponding path program 11 times [2023-01-27 20:07:50,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:07:50,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888094443] [2023-01-27 20:07:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:07:50,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:07:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:07:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 20:07:52,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:07:52,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888094443] [2023-01-27 20:07:52,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888094443] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:07:52,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273104822] [2023-01-27 20:07:52,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:07:52,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:07:52,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:07:52,441 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:07:52,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 20:07:52,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:07:52,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:07:52,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 63 conjunts are in the unsatisfiable core [2023-01-27 20:07:52,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:07:52,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:07:52,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:07:52,983 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:07:52,984 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 20 treesize of output 25 [2023-01-27 20:07:53,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:07:53,144 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 27 treesize of output 19 [2023-01-27 20:07:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:53,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:07:53,741 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (< c_~result_5~0 0)) (.cse1 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (= (select (select .cse14 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse14 c_~o_0~0.base) c_~o_0~0.offset))))) (.cse0 (< 0 c_~result_5~0))) (and (or (and (or .cse0 .cse1) (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse2 (select (select .cse4 c_~o_2~0.base) c_~o_2~0.offset)) (.cse3 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse2 .cse3) (= .cse2 .cse3)))))) .cse5) (or (= c_~result_5~0 0) (and (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse7 (select (select .cse8 c_~o_2~0.base) c_~o_2~0.offset)) (.cse6 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse6 .cse7) (< .cse7 .cse6))))) (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse9 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset)))) .cse5) (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse10 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse10 c_~o_2~0.base) c_~o_2~0.offset)))) .cse0))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 5) .cse1) (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse12 (select (select .cse13 c_~o_2~0.base) c_~o_2~0.offset)) (.cse11 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse11 .cse12) (= .cse12 .cse11))))) .cse0))) is different from false [2023-01-27 20:07:53,808 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~o_2~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))) (let ((.cse2 (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse0)) (.cse6 (< .cse0 |c_thread1Thread1of1ForFork1_#t~mem1#1|)) (.cse8 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (= (select (select .cse15 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse15 c_~o_0~0.base) c_~o_0~0.offset)))))) (and (or (= .cse0 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (and (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse1 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)))) .cse2) (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse4 (select (select .cse5 c_~o_2~0.base) c_~o_2~0.offset)) (.cse3 (select (select .cse5 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse3 .cse4) (< .cse4 .cse3))))) (or .cse6 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse7 c_~o_2~0.base) c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) .cse8) (or .cse6 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse10 (select (select .cse11 c_~o_2~0.base) c_~o_2~0.offset)) (.cse9 (select (select .cse11 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse9 .cse10) (= .cse10 .cse9)))))) (or .cse2 (and (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse12 (select (select .cse14 c_~o_2~0.base) c_~o_2~0.offset)) (.cse13 (select (select .cse14 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse12 .cse13) (= .cse12 .cse13))))) (or .cse6 .cse8)))))) is different from false [2023-01-27 20:07:53,877 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-27 20:07:53,878 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 322 treesize of output 263 [2023-01-27 20:07:53,893 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:07:53,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 207 [2023-01-27 20:07:53,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:07:53,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 199 [2023-01-27 20:07:53,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:07:53,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 183 [2023-01-27 20:07:54,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:07:54,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:07:54,903 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 46 [2023-01-27 20:07:54,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:07:54,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2023-01-27 20:07:54,927 INFO L321 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2023-01-27 20:07:54,927 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 237 treesize of output 1 [2023-01-27 20:07:54,962 INFO L321 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2023-01-27 20:07:54,962 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 150 treesize of output 1 [2023-01-27 20:07:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:55,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273104822] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:07:55,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:07:55,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 38 [2023-01-27 20:07:55,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267691804] [2023-01-27 20:07:55,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:07:55,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-27 20:07:55,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:07:55,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-27 20:07:55,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1260, Unknown=2, NotChecked=146, Total=1560 [2023-01-27 20:07:55,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 489 [2023-01-27 20:07:55,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 184 transitions, 2406 flow. Second operand has 40 states, 40 states have (on average 135.6) internal successors, (5424), 40 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:55,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:07:55,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 489 [2023-01-27 20:07:55,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:07:58,234 INFO L130 PetriNetUnfolder]: 1013/1857 cut-off events. [2023-01-27 20:07:58,234 INFO L131 PetriNetUnfolder]: For 18945/18945 co-relation queries the response was YES. [2023-01-27 20:07:58,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11467 conditions, 1857 events. 1013/1857 cut-off events. For 18945/18945 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 10909 event pairs, 116 based on Foata normal form. 12/1869 useless extension candidates. Maximal degree in co-relation 11337. Up to 508 conditions per place. [2023-01-27 20:07:58,251 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 125 selfloop transitions, 115 changer transitions 18/258 dead transitions. [2023-01-27 20:07:58,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 258 transitions, 3628 flow [2023-01-27 20:07:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-27 20:07:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-27 20:07:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3448 transitions. [2023-01-27 20:07:58,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2820449897750511 [2023-01-27 20:07:58,258 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3448 transitions. [2023-01-27 20:07:58,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3448 transitions. [2023-01-27 20:07:58,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:07:58,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3448 transitions. [2023-01-27 20:07:58,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 137.92) internal successors, (3448), 25 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:58,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:58,270 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:58,270 INFO L175 Difference]: Start difference. First operand has 163 places, 184 transitions, 2406 flow. Second operand 25 states and 3448 transitions. [2023-01-27 20:07:58,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 258 transitions, 3628 flow [2023-01-27 20:07:58,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 258 transitions, 3520 flow, removed 46 selfloop flow, removed 4 redundant places. [2023-01-27 20:07:58,320 INFO L231 Difference]: Finished difference. Result has 190 places, 194 transitions, 2849 flow [2023-01-27 20:07:58,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2849, PETRI_PLACES=190, PETRI_TRANSITIONS=194} [2023-01-27 20:07:58,320 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 167 predicate places. [2023-01-27 20:07:58,320 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 194 transitions, 2849 flow [2023-01-27 20:07:58,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 135.6) internal successors, (5424), 40 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:07:58,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:07:58,321 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:07:58,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-27 20:07:58,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:07:58,527 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:07:58,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:07:58,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2033547511, now seen corresponding path program 12 times [2023-01-27 20:07:58,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:07:58,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144839362] [2023-01-27 20:07:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:07:58,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:07:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:07:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:59,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:07:59,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144839362] [2023-01-27 20:07:59,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144839362] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:07:59,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920475084] [2023-01-27 20:07:59,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:07:59,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:07:59,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:07:59,530 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:07:59,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 20:07:59,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:07:59,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:07:59,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:07:59,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:07:59,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:07:59,885 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 27 treesize of output 19 [2023-01-27 20:07:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:07:59,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:00,356 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-01-27 20:08:00,356 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 185 treesize of output 103 [2023-01-27 20:08:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:00,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920475084] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:00,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:00,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-01-27 20:08:00,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253126921] [2023-01-27 20:08:00,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:00,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 20:08:00,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:00,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 20:08:00,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:08:00,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-27 20:08:00,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 194 transitions, 2849 flow. Second operand has 24 states, 24 states have (on average 162.04166666666666) internal successors, (3889), 24 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:00,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:00,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-27 20:08:00,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:01,372 INFO L130 PetriNetUnfolder]: 1051/1915 cut-off events. [2023-01-27 20:08:01,372 INFO L131 PetriNetUnfolder]: For 25632/25632 co-relation queries the response was YES. [2023-01-27 20:08:01,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12966 conditions, 1915 events. 1051/1915 cut-off events. For 25632/25632 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 11235 event pairs, 352 based on Foata normal form. 6/1921 useless extension candidates. Maximal degree in co-relation 12818. Up to 1562 conditions per place. [2023-01-27 20:08:01,418 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 174 selfloop transitions, 53 changer transitions 11/238 dead transitions. [2023-01-27 20:08:01,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 238 transitions, 3893 flow [2023-01-27 20:08:01,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:08:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:08:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2307 transitions. [2023-01-27 20:08:01,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33698510078878174 [2023-01-27 20:08:01,421 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2307 transitions. [2023-01-27 20:08:01,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2307 transitions. [2023-01-27 20:08:01,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:01,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2307 transitions. [2023-01-27 20:08:01,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 164.78571428571428) internal successors, (2307), 14 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:01,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:01,437 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:01,437 INFO L175 Difference]: Start difference. First operand has 190 places, 194 transitions, 2849 flow. Second operand 14 states and 2307 transitions. [2023-01-27 20:08:01,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 238 transitions, 3893 flow [2023-01-27 20:08:01,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 238 transitions, 3693 flow, removed 40 selfloop flow, removed 16 redundant places. [2023-01-27 20:08:01,583 INFO L231 Difference]: Finished difference. Result has 191 places, 207 transitions, 3098 flow [2023-01-27 20:08:01,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3098, PETRI_PLACES=191, PETRI_TRANSITIONS=207} [2023-01-27 20:08:01,583 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 168 predicate places. [2023-01-27 20:08:01,583 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 207 transitions, 3098 flow [2023-01-27 20:08:01,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 162.04166666666666) internal successors, (3889), 24 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:01,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:01,584 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:01,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:01,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:01,784 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:01,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:01,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2027142943, now seen corresponding path program 13 times [2023-01-27 20:08:01,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:01,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423940568] [2023-01-27 20:08:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:01,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:02,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:02,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423940568] [2023-01-27 20:08:02,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423940568] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:02,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815595019] [2023-01-27 20:08:02,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:08:02,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:02,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:02,672 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:02,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 20:08:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:02,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 60 conjunts are in the unsatisfiable core [2023-01-27 20:08:02,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:03,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:08:03,097 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 14 treesize of output 16 [2023-01-27 20:08:03,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:08:03,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-27 20:08:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:03,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:04,077 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (and (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (let ((.cse2 (select .cse0 .cse3))) (or (< (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse2) (= .cse2 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse6 (select .cse7 ~o_2~0.base))) (let ((.cse4 (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset)) (.cse5 (select .cse6 c_~o_2~0.offset))) (or (< .cse4 .cse5) (< (select .cse6 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse4 .cse5)))))) (or (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (= (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse8 ~o_2~0.base) c_~o_2~0.offset)))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse11 (select .cse12 ~o_2~0.base))) (let ((.cse10 (select (select .cse12 c_~o_0~0.base) c_~o_0~0.offset)) (.cse9 (select .cse11 c_~o_2~0.offset))) (or (< .cse9 .cse10) (= .cse10 .cse9) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse11 .cse3))))))) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse14 (select .cse13 ~o_2~0.base))) (let ((.cse15 (select .cse14 .cse3))) (or (< (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset) (select .cse14 c_~o_2~0.offset)) (< .cse15 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse15 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))))) is different from false [2023-01-27 20:08:04,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:08:04,118 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 156 treesize of output 160 [2023-01-27 20:08:04,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:08:04,143 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 76 treesize of output 84 [2023-01-27 20:08:04,693 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:08:04,696 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:08:04,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-01-27 20:08:04,698 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:08:04,700 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:08:04,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-01-27 20:08:04,704 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:08:04,707 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:08:04,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-01-27 20:08:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:04,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815595019] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:04,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:04,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-01-27 20:08:04,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350883578] [2023-01-27 20:08:04,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:04,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:08:04,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:04,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:08:04,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=816, Unknown=1, NotChecked=58, Total=992 [2023-01-27 20:08:04,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 489 [2023-01-27 20:08:04,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 207 transitions, 3098 flow. Second operand has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:04,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:04,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 489 [2023-01-27 20:08:04,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:06,227 INFO L130 PetriNetUnfolder]: 1127/2039 cut-off events. [2023-01-27 20:08:06,227 INFO L131 PetriNetUnfolder]: For 29082/29082 co-relation queries the response was YES. [2023-01-27 20:08:06,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14543 conditions, 2039 events. 1127/2039 cut-off events. For 29082/29082 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 11969 event pairs, 241 based on Foata normal form. 2/2041 useless extension candidates. Maximal degree in co-relation 14410. Up to 1568 conditions per place. [2023-01-27 20:08:06,246 INFO L137 encePairwiseOnDemand]: 475/489 looper letters, 139 selfloop transitions, 121 changer transitions 3/263 dead transitions. [2023-01-27 20:08:06,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 263 transitions, 4420 flow [2023-01-27 20:08:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:08:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:08:06,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2264 transitions. [2023-01-27 20:08:06,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307040607654105 [2023-01-27 20:08:06,250 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2264 transitions. [2023-01-27 20:08:06,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2264 transitions. [2023-01-27 20:08:06,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:06,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2264 transitions. [2023-01-27 20:08:06,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.71428571428572) internal successors, (2264), 14 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:06,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:06,257 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:06,257 INFO L175 Difference]: Start difference. First operand has 191 places, 207 transitions, 3098 flow. Second operand 14 states and 2264 transitions. [2023-01-27 20:08:06,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 263 transitions, 4420 flow [2023-01-27 20:08:06,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 263 transitions, 4197 flow, removed 84 selfloop flow, removed 8 redundant places. [2023-01-27 20:08:06,395 INFO L231 Difference]: Finished difference. Result has 198 places, 241 transitions, 3899 flow [2023-01-27 20:08:06,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2925, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3899, PETRI_PLACES=198, PETRI_TRANSITIONS=241} [2023-01-27 20:08:06,395 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 175 predicate places. [2023-01-27 20:08:06,395 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 241 transitions, 3899 flow [2023-01-27 20:08:06,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:06,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:06,396 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:06,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:06,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:06,609 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:06,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:06,609 INFO L85 PathProgramCache]: Analyzing trace with hash -797449613, now seen corresponding path program 14 times [2023-01-27 20:08:06,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:06,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632430547] [2023-01-27 20:08:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:06,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:07,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:07,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632430547] [2023-01-27 20:08:07,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632430547] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:07,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031352180] [2023-01-27 20:08:07,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:08:07,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:07,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:07,486 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:07,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 20:08:07,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:08:07,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:08:07,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:08:07,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:07,810 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:08:07,810 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 27 treesize of output 19 [2023-01-27 20:08:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:07,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:08,249 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:08:08,249 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 110 treesize of output 71 [2023-01-27 20:08:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:08,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031352180] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:08,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:08,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-01-27 20:08:08,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762639802] [2023-01-27 20:08:08,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:08,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 20:08:08,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:08,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 20:08:08,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2023-01-27 20:08:08,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-27 20:08:08,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 241 transitions, 3899 flow. Second operand has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:08,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:08,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-27 20:08:08,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:09,676 INFO L130 PetriNetUnfolder]: 1313/2381 cut-off events. [2023-01-27 20:08:09,677 INFO L131 PetriNetUnfolder]: For 34957/34957 co-relation queries the response was YES. [2023-01-27 20:08:09,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17828 conditions, 2381 events. 1313/2381 cut-off events. For 34957/34957 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 14652 event pairs, 139 based on Foata normal form. 2/2383 useless extension candidates. Maximal degree in co-relation 17692. Up to 866 conditions per place. [2023-01-27 20:08:09,724 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 202 selfloop transitions, 120 changer transitions 10/332 dead transitions. [2023-01-27 20:08:09,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 332 transitions, 5886 flow [2023-01-27 20:08:09,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:08:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:08:09,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2495 transitions. [2023-01-27 20:08:09,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3401499659168371 [2023-01-27 20:08:09,745 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2495 transitions. [2023-01-27 20:08:09,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2495 transitions. [2023-01-27 20:08:09,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:09,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2495 transitions. [2023-01-27 20:08:09,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.33333333333334) internal successors, (2495), 15 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:09,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:09,756 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:09,756 INFO L175 Difference]: Start difference. First operand has 198 places, 241 transitions, 3899 flow. Second operand 15 states and 2495 transitions. [2023-01-27 20:08:09,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 332 transitions, 5886 flow [2023-01-27 20:08:09,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 332 transitions, 5629 flow, removed 30 selfloop flow, removed 10 redundant places. [2023-01-27 20:08:09,968 INFO L231 Difference]: Finished difference. Result has 205 places, 271 transitions, 4664 flow [2023-01-27 20:08:09,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=3678, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4664, PETRI_PLACES=205, PETRI_TRANSITIONS=271} [2023-01-27 20:08:09,969 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 182 predicate places. [2023-01-27 20:08:09,969 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 271 transitions, 4664 flow [2023-01-27 20:08:09,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:09,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:09,970 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:09,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:10,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:10,175 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:10,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:10,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1548093533, now seen corresponding path program 15 times [2023-01-27 20:08:10,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:10,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466916865] [2023-01-27 20:08:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:10,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:11,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:11,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466916865] [2023-01-27 20:08:11,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466916865] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:11,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716705801] [2023-01-27 20:08:11,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:08:11,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:11,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:11,121 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:11,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 20:08:11,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:08:11,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:08:11,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-27 20:08:11,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:11,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:08:11,496 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 14 treesize of output 16 [2023-01-27 20:08:11,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:08:11,593 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 27 treesize of output 19 [2023-01-27 20:08:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:11,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:12,368 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (and (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse2 (select .cse4 ~o_2~0.base))) (let ((.cse0 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset)) (.cse1 (select .cse2 c_~o_2~0.offset))) (or (< .cse0 .cse1) (< (select .cse2 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse0 .cse1)))))) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse5 (select .cse6 ~o_2~0.base))) (let ((.cse7 (select .cse5 .cse3))) (or (< (select .cse5 c_~o_2~0.offset) (select (select .cse6 c_~o_0~0.base) c_~o_0~0.offset)) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse7) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse7)))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (= (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse8 ~o_2~0.base) c_~o_2~0.offset))))) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse11 (select .cse12 ~o_2~0.base))) (let ((.cse10 (select (select .cse12 c_~o_0~0.base) c_~o_0~0.offset)) (.cse9 (select .cse11 c_~o_2~0.offset))) (or (< .cse9 .cse10) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse11 .cse3)) (= .cse10 .cse9)))))) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse14 (select .cse13 ~o_2~0.base))) (let ((.cse15 (select .cse14 .cse3))) (or (< (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset) (select .cse14 c_~o_2~0.offset)) (< .cse15 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse15)))))))) is different from false [2023-01-27 20:08:12,399 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:08:12,400 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 66 treesize of output 57 [2023-01-27 20:08:12,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:08:12,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-01-27 20:08:12,506 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-27 20:08:12,506 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 176 treesize of output 173 [2023-01-27 20:08:12,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:08:12,528 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 112 treesize of output 118 [2023-01-27 20:08:13,315 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:08:13,318 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:08:13,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-01-27 20:08:13,320 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:08:13,322 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:08:13,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-01-27 20:08:13,325 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:08:13,328 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:08:13,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-01-27 20:08:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:13,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716705801] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:13,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:13,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-01-27 20:08:13,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149105888] [2023-01-27 20:08:13,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:13,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:08:13,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:13,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:08:13,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=816, Unknown=1, NotChecked=58, Total=992 [2023-01-27 20:08:13,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 489 [2023-01-27 20:08:13,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 271 transitions, 4664 flow. Second operand has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:13,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:13,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 489 [2023-01-27 20:08:13,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:14,713 INFO L130 PetriNetUnfolder]: 1313/2379 cut-off events. [2023-01-27 20:08:14,714 INFO L131 PetriNetUnfolder]: For 36460/36460 co-relation queries the response was YES. [2023-01-27 20:08:14,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18690 conditions, 2379 events. 1313/2379 cut-off events. For 36460/36460 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 14455 event pairs, 287 based on Foata normal form. 2/2381 useless extension candidates. Maximal degree in co-relation 18554. Up to 1762 conditions per place. [2023-01-27 20:08:14,738 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 167 selfloop transitions, 129 changer transitions 5/301 dead transitions. [2023-01-27 20:08:14,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 301 transitions, 5521 flow [2023-01-27 20:08:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:08:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:08:14,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2265 transitions. [2023-01-27 20:08:14,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3308501314636284 [2023-01-27 20:08:14,759 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2265 transitions. [2023-01-27 20:08:14,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2265 transitions. [2023-01-27 20:08:14,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:14,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2265 transitions. [2023-01-27 20:08:14,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.78571428571428) internal successors, (2265), 14 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:14,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:14,778 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:14,779 INFO L175 Difference]: Start difference. First operand has 205 places, 271 transitions, 4664 flow. Second operand 14 states and 2265 transitions. [2023-01-27 20:08:14,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 301 transitions, 5521 flow [2023-01-27 20:08:14,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 301 transitions, 4984 flow, removed 183 selfloop flow, removed 13 redundant places. [2023-01-27 20:08:14,963 INFO L231 Difference]: Finished difference. Result has 206 places, 272 transitions, 4454 flow [2023-01-27 20:08:14,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4143, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4454, PETRI_PLACES=206, PETRI_TRANSITIONS=272} [2023-01-27 20:08:14,964 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 183 predicate places. [2023-01-27 20:08:14,964 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 272 transitions, 4454 flow [2023-01-27 20:08:14,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:14,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:14,965 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:14,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:15,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:15,170 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:15,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:15,171 INFO L85 PathProgramCache]: Analyzing trace with hash -308879501, now seen corresponding path program 16 times [2023-01-27 20:08:15,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:15,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751247841] [2023-01-27 20:08:15,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:15,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:15,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:15,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751247841] [2023-01-27 20:08:15,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751247841] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:15,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471573316] [2023-01-27 20:08:15,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:08:15,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:15,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:15,845 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:15,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 20:08:16,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:08:16,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:08:16,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:08:16,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:16,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:08:16,175 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 27 treesize of output 19 [2023-01-27 20:08:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:16,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:16,800 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:08:16,801 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 58 treesize of output 58 [2023-01-27 20:08:16,857 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:08:16,857 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 19 treesize of output 11 [2023-01-27 20:08:16,873 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:08:16,873 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 58 treesize of output 1 [2023-01-27 20:08:16,880 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:08:16,880 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 58 treesize of output 1 [2023-01-27 20:08:16,885 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-27 20:08:16,893 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:08:16,894 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 58 treesize of output 1 [2023-01-27 20:08:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:16,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471573316] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:16,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:16,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-27 20:08:16,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128106870] [2023-01-27 20:08:16,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:16,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 20:08:16,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:16,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 20:08:16,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:08:16,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-27 20:08:16,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 272 transitions, 4454 flow. Second operand has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:16,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:16,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-27 20:08:16,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:17,880 INFO L130 PetriNetUnfolder]: 1329/2421 cut-off events. [2023-01-27 20:08:17,880 INFO L131 PetriNetUnfolder]: For 32125/32125 co-relation queries the response was YES. [2023-01-27 20:08:17,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17786 conditions, 2421 events. 1329/2421 cut-off events. For 32125/32125 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 14889 event pairs, 437 based on Foata normal form. 2/2423 useless extension candidates. Maximal degree in co-relation 17654. Up to 2078 conditions per place. [2023-01-27 20:08:17,903 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 251 selfloop transitions, 55 changer transitions 2/308 dead transitions. [2023-01-27 20:08:17,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 308 transitions, 5480 flow [2023-01-27 20:08:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:08:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:08:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2156 transitions. [2023-01-27 20:08:17,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33915368884694036 [2023-01-27 20:08:17,919 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2156 transitions. [2023-01-27 20:08:17,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2156 transitions. [2023-01-27 20:08:17,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:17,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2156 transitions. [2023-01-27 20:08:17,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 165.84615384615384) internal successors, (2156), 13 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:17,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:17,925 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:17,925 INFO L175 Difference]: Start difference. First operand has 206 places, 272 transitions, 4454 flow. Second operand 13 states and 2156 transitions. [2023-01-27 20:08:17,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 308 transitions, 5480 flow [2023-01-27 20:08:18,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 308 transitions, 5184 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-01-27 20:08:18,085 INFO L231 Difference]: Finished difference. Result has 208 places, 282 transitions, 4533 flow [2023-01-27 20:08:18,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4158, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4533, PETRI_PLACES=208, PETRI_TRANSITIONS=282} [2023-01-27 20:08:18,086 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 185 predicate places. [2023-01-27 20:08:18,086 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 282 transitions, 4533 flow [2023-01-27 20:08:18,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:18,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:18,087 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:18,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:18,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-01-27 20:08:18,294 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:18,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:18,294 INFO L85 PathProgramCache]: Analyzing trace with hash 702796357, now seen corresponding path program 17 times [2023-01-27 20:08:18,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:18,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419268927] [2023-01-27 20:08:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:18,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:19,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:19,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419268927] [2023-01-27 20:08:19,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419268927] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:19,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121839696] [2023-01-27 20:08:19,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:08:19,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:19,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:19,112 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:19,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 20:08:19,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:08:19,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:08:19,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-27 20:08:19,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:19,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:08:19,461 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 27 treesize of output 23 [2023-01-27 20:08:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:19,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:19,942 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-01-27 20:08:19,942 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 165 treesize of output 99 [2023-01-27 20:08:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:20,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121839696] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:20,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:20,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-01-27 20:08:20,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530216050] [2023-01-27 20:08:20,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:20,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 20:08:20,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:20,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 20:08:20,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-01-27 20:08:20,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-27 20:08:20,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 282 transitions, 4533 flow. Second operand has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:20,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:20,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-27 20:08:20,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:21,118 INFO L130 PetriNetUnfolder]: 1327/2429 cut-off events. [2023-01-27 20:08:21,118 INFO L131 PetriNetUnfolder]: For 33077/33077 co-relation queries the response was YES. [2023-01-27 20:08:21,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17867 conditions, 2429 events. 1327/2429 cut-off events. For 33077/33077 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15025 event pairs, 445 based on Foata normal form. 2/2431 useless extension candidates. Maximal degree in co-relation 17734. Up to 2056 conditions per place. [2023-01-27 20:08:21,139 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 238 selfloop transitions, 68 changer transitions 2/308 dead transitions. [2023-01-27 20:08:21,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 308 transitions, 5378 flow [2023-01-27 20:08:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:08:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:08:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2153 transitions. [2023-01-27 20:08:21,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33868176812962086 [2023-01-27 20:08:21,156 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2153 transitions. [2023-01-27 20:08:21,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2153 transitions. [2023-01-27 20:08:21,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:21,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2153 transitions. [2023-01-27 20:08:21,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 165.6153846153846) internal successors, (2153), 13 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:21,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:21,162 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:21,162 INFO L175 Difference]: Start difference. First operand has 208 places, 282 transitions, 4533 flow. Second operand 13 states and 2153 transitions. [2023-01-27 20:08:21,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 308 transitions, 5378 flow [2023-01-27 20:08:21,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 308 transitions, 5203 flow, removed 57 selfloop flow, removed 7 redundant places. [2023-01-27 20:08:21,283 INFO L231 Difference]: Finished difference. Result has 215 places, 286 transitions, 4598 flow [2023-01-27 20:08:21,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4598, PETRI_PLACES=215, PETRI_TRANSITIONS=286} [2023-01-27 20:08:21,285 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 192 predicate places. [2023-01-27 20:08:21,285 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 286 transitions, 4598 flow [2023-01-27 20:08:21,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:21,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:21,286 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:21,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:21,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-27 20:08:21,492 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:21,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:21,492 INFO L85 PathProgramCache]: Analyzing trace with hash -347288759, now seen corresponding path program 18 times [2023-01-27 20:08:21,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:21,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227388885] [2023-01-27 20:08:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:21,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:22,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:22,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227388885] [2023-01-27 20:08:22,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227388885] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:22,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654491126] [2023-01-27 20:08:22,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:08:22,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:22,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:22,549 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:22,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 20:08:22,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 20:08:22,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:08:22,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:08:22,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:23,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:08:23,030 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 27 treesize of output 19 [2023-01-27 20:08:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:23,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:23,818 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:08:23,818 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 58 treesize of output 58 [2023-01-27 20:08:23,865 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:08:23,865 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 19 treesize of output 11 [2023-01-27 20:08:23,873 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:08:23,873 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 58 treesize of output 1 [2023-01-27 20:08:23,880 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:08:23,880 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 58 treesize of output 1 [2023-01-27 20:08:23,883 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-27 20:08:23,892 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-27 20:08:23,892 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 58 treesize of output 1 [2023-01-27 20:08:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:23,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654491126] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:23,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:23,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-27 20:08:23,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839070453] [2023-01-27 20:08:23,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:23,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 20:08:23,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 20:08:23,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:08:23,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-27 20:08:23,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 286 transitions, 4598 flow. Second operand has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:23,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:23,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-27 20:08:23,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:25,146 INFO L130 PetriNetUnfolder]: 1327/2427 cut-off events. [2023-01-27 20:08:25,146 INFO L131 PetriNetUnfolder]: For 32331/32331 co-relation queries the response was YES. [2023-01-27 20:08:25,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17875 conditions, 2427 events. 1327/2427 cut-off events. For 32331/32331 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15041 event pairs, 435 based on Foata normal form. 2/2429 useless extension candidates. Maximal degree in co-relation 17740. Up to 2054 conditions per place. [2023-01-27 20:08:25,168 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 257 selfloop transitions, 56 changer transitions 3/316 dead transitions. [2023-01-27 20:08:25,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 316 transitions, 5472 flow [2023-01-27 20:08:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 20:08:25,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 20:08:25,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1995 transitions. [2023-01-27 20:08:25,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3399795501022495 [2023-01-27 20:08:25,170 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1995 transitions. [2023-01-27 20:08:25,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1995 transitions. [2023-01-27 20:08:25,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:25,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1995 transitions. [2023-01-27 20:08:25,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 166.25) internal successors, (1995), 12 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:25,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:25,191 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:25,191 INFO L175 Difference]: Start difference. First operand has 215 places, 286 transitions, 4598 flow. Second operand 12 states and 1995 transitions. [2023-01-27 20:08:25,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 316 transitions, 5472 flow [2023-01-27 20:08:25,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 316 transitions, 5304 flow, removed 22 selfloop flow, removed 10 redundant places. [2023-01-27 20:08:25,321 INFO L231 Difference]: Finished difference. Result has 217 places, 288 transitions, 4611 flow [2023-01-27 20:08:25,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4430, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4611, PETRI_PLACES=217, PETRI_TRANSITIONS=288} [2023-01-27 20:08:25,321 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 194 predicate places. [2023-01-27 20:08:25,322 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 288 transitions, 4611 flow [2023-01-27 20:08:25,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:25,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:25,322 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:25,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:25,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-27 20:08:25,523 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:25,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:25,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1754254317, now seen corresponding path program 19 times [2023-01-27 20:08:25,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:25,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922805724] [2023-01-27 20:08:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:25,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:26,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:26,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922805724] [2023-01-27 20:08:26,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922805724] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:26,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311020884] [2023-01-27 20:08:26,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:08:26,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:26,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:26,425 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:26,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 20:08:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:26,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:08:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:26,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:08:26,782 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 46 treesize of output 30 [2023-01-27 20:08:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:26,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:27,035 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:08:27,036 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 32 treesize of output 48 [2023-01-27 20:08:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:27,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311020884] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:27,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:27,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:08:27,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249117765] [2023-01-27 20:08:27,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:27,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:08:27,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:08:27,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:08:27,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:08:27,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 288 transitions, 4611 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:27,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:27,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:08:27,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:28,147 INFO L130 PetriNetUnfolder]: 1389/2543 cut-off events. [2023-01-27 20:08:28,147 INFO L131 PetriNetUnfolder]: For 35006/35006 co-relation queries the response was YES. [2023-01-27 20:08:28,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18640 conditions, 2543 events. 1389/2543 cut-off events. For 35006/35006 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 16040 event pairs, 249 based on Foata normal form. 8/2551 useless extension candidates. Maximal degree in co-relation 18504. Up to 781 conditions per place. [2023-01-27 20:08:28,169 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 252 selfloop transitions, 145 changer transitions 3/400 dead transitions. [2023-01-27 20:08:28,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 400 transitions, 6788 flow [2023-01-27 20:08:28,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:08:28,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:08:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2543 transitions. [2023-01-27 20:08:28,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3466939331970007 [2023-01-27 20:08:28,172 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2543 transitions. [2023-01-27 20:08:28,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2543 transitions. [2023-01-27 20:08:28,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:28,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2543 transitions. [2023-01-27 20:08:28,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 169.53333333333333) internal successors, (2543), 15 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:28,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:28,194 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:28,194 INFO L175 Difference]: Start difference. First operand has 217 places, 288 transitions, 4611 flow. Second operand 15 states and 2543 transitions. [2023-01-27 20:08:28,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 400 transitions, 6788 flow [2023-01-27 20:08:28,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 400 transitions, 6623 flow, removed 14 selfloop flow, removed 10 redundant places. [2023-01-27 20:08:28,327 INFO L231 Difference]: Finished difference. Result has 224 places, 301 transitions, 4950 flow [2023-01-27 20:08:28,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4474, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4950, PETRI_PLACES=224, PETRI_TRANSITIONS=301} [2023-01-27 20:08:28,331 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 201 predicate places. [2023-01-27 20:08:28,331 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 301 transitions, 4950 flow [2023-01-27 20:08:28,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:28,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:28,331 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:28,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:28,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:28,537 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:28,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:28,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1070556359, now seen corresponding path program 20 times [2023-01-27 20:08:28,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:28,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665737726] [2023-01-27 20:08:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:28,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:29,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:29,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665737726] [2023-01-27 20:08:29,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665737726] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:29,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024178746] [2023-01-27 20:08:29,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:08:29,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:29,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:29,531 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:29,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 20:08:29,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:08:29,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:08:29,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:08:29,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:29,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:08:29,906 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 65 treesize of output 41 [2023-01-27 20:08:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:29,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:30,152 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:08:30,153 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 32 treesize of output 48 [2023-01-27 20:08:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:30,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024178746] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:30,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:30,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-01-27 20:08:30,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111029173] [2023-01-27 20:08:30,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:30,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 20:08:30,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:30,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 20:08:30,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:08:30,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:08:30,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 301 transitions, 4950 flow. Second operand has 21 states, 21 states have (on average 165.1904761904762) internal successors, (3469), 21 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:30,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:30,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:08:30,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:32,092 INFO L130 PetriNetUnfolder]: 1481/2691 cut-off events. [2023-01-27 20:08:32,093 INFO L131 PetriNetUnfolder]: For 38086/38086 co-relation queries the response was YES. [2023-01-27 20:08:32,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20348 conditions, 2691 events. 1481/2691 cut-off events. For 38086/38086 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 17002 event pairs, 256 based on Foata normal form. 8/2699 useless extension candidates. Maximal degree in co-relation 20210. Up to 931 conditions per place. [2023-01-27 20:08:32,115 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 231 selfloop transitions, 184 changer transitions 8/423 dead transitions. [2023-01-27 20:08:32,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 423 transitions, 7380 flow [2023-01-27 20:08:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 20:08:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 20:08:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3698 transitions. [2023-01-27 20:08:32,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34374419036995724 [2023-01-27 20:08:32,133 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3698 transitions. [2023-01-27 20:08:32,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3698 transitions. [2023-01-27 20:08:32,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:32,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3698 transitions. [2023-01-27 20:08:32,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 168.0909090909091) internal successors, (3698), 22 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:32,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:32,157 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:32,157 INFO L175 Difference]: Start difference. First operand has 224 places, 301 transitions, 4950 flow. Second operand 22 states and 3698 transitions. [2023-01-27 20:08:32,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 423 transitions, 7380 flow [2023-01-27 20:08:32,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 423 transitions, 7157 flow, removed 35 selfloop flow, removed 5 redundant places. [2023-01-27 20:08:32,335 INFO L231 Difference]: Finished difference. Result has 244 places, 338 transitions, 5752 flow [2023-01-27 20:08:32,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5752, PETRI_PLACES=244, PETRI_TRANSITIONS=338} [2023-01-27 20:08:32,337 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 221 predicate places. [2023-01-27 20:08:32,337 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 338 transitions, 5752 flow [2023-01-27 20:08:32,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.1904761904762) internal successors, (3469), 21 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:32,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:32,338 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:32,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:32,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-27 20:08:32,538 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:32,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:32,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1477706161, now seen corresponding path program 21 times [2023-01-27 20:08:32,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:32,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267035147] [2023-01-27 20:08:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:32,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:33,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:33,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267035147] [2023-01-27 20:08:33,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267035147] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:33,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120033896] [2023-01-27 20:08:33,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:08:33,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:33,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:33,350 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:33,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 20:08:33,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:08:33,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:08:33,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-27 20:08:33,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:33,832 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:08:33,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:08:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:33,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:34,180 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 20:08:34,181 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 82 treesize of output 99 [2023-01-27 20:08:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:34,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120033896] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:34,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:34,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2023-01-27 20:08:34,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227447372] [2023-01-27 20:08:34,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:34,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 20:08:34,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:34,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 20:08:34,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:08:34,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-27 20:08:34,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 338 transitions, 5752 flow. Second operand has 24 states, 24 states have (on average 162.0) internal successors, (3888), 24 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:34,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:34,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-27 20:08:34,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:35,881 INFO L130 PetriNetUnfolder]: 1707/3101 cut-off events. [2023-01-27 20:08:35,882 INFO L131 PetriNetUnfolder]: For 47341/47341 co-relation queries the response was YES. [2023-01-27 20:08:35,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24676 conditions, 3101 events. 1707/3101 cut-off events. For 47341/47341 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 20201 event pairs, 238 based on Foata normal form. 12/3113 useless extension candidates. Maximal degree in co-relation 24534. Up to 2104 conditions per place. [2023-01-27 20:08:35,909 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 220 selfloop transitions, 259 changer transitions 1/480 dead transitions. [2023-01-27 20:08:35,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 480 transitions, 8806 flow [2023-01-27 20:08:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 20:08:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 20:08:35,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3790 transitions. [2023-01-27 20:08:35,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33697874988885923 [2023-01-27 20:08:35,914 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3790 transitions. [2023-01-27 20:08:35,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3790 transitions. [2023-01-27 20:08:35,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:35,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3790 transitions. [2023-01-27 20:08:35,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 164.7826086956522) internal successors, (3790), 23 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:35,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 489.0) internal successors, (11736), 24 states have internal predecessors, (11736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:35,959 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 489.0) internal successors, (11736), 24 states have internal predecessors, (11736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:35,959 INFO L175 Difference]: Start difference. First operand has 244 places, 338 transitions, 5752 flow. Second operand 23 states and 3790 transitions. [2023-01-27 20:08:35,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 480 transitions, 8806 flow [2023-01-27 20:08:36,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 480 transitions, 8611 flow, removed 55 selfloop flow, removed 6 redundant places. [2023-01-27 20:08:36,167 INFO L231 Difference]: Finished difference. Result has 265 places, 433 transitions, 8165 flow [2023-01-27 20:08:36,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=5563, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8165, PETRI_PLACES=265, PETRI_TRANSITIONS=433} [2023-01-27 20:08:36,168 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 242 predicate places. [2023-01-27 20:08:36,168 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 433 transitions, 8165 flow [2023-01-27 20:08:36,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 162.0) internal successors, (3888), 24 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:36,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:36,170 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:36,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:36,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:36,376 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:36,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:36,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1048299191, now seen corresponding path program 22 times [2023-01-27 20:08:36,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:36,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077721884] [2023-01-27 20:08:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:36,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:37,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:37,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077721884] [2023-01-27 20:08:37,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077721884] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:37,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554568582] [2023-01-27 20:08:37,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:08:37,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:37,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:37,193 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:37,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-27 20:08:37,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:08:37,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:08:37,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:08:37,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:37,539 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:08:37,540 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 60 treesize of output 32 [2023-01-27 20:08:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:37,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:37,745 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:08:37,746 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 32 treesize of output 48 [2023-01-27 20:08:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:37,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554568582] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:37,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:37,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-27 20:08:37,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039426064] [2023-01-27 20:08:37,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:37,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:08:37,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:37,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:08:37,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:08:37,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:08:37,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 433 transitions, 8165 flow. Second operand has 19 states, 19 states have (on average 165.26315789473685) internal successors, (3140), 19 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:37,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:37,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:08:37,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:38,883 INFO L130 PetriNetUnfolder]: 1711/3113 cut-off events. [2023-01-27 20:08:38,883 INFO L131 PetriNetUnfolder]: For 55419/55419 co-relation queries the response was YES. [2023-01-27 20:08:38,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26893 conditions, 3113 events. 1711/3113 cut-off events. For 55419/55419 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 20397 event pairs, 437 based on Foata normal form. 8/3121 useless extension candidates. Maximal degree in co-relation 26744. Up to 2215 conditions per place. [2023-01-27 20:08:38,919 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 216 selfloop transitions, 241 changer transitions 12/469 dead transitions. [2023-01-27 20:08:38,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 469 transitions, 9516 flow [2023-01-27 20:08:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:08:38,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:08:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1858 transitions. [2023-01-27 20:08:38,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3454173638222718 [2023-01-27 20:08:38,921 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1858 transitions. [2023-01-27 20:08:38,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1858 transitions. [2023-01-27 20:08:38,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:38,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1858 transitions. [2023-01-27 20:08:38,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.9090909090909) internal successors, (1858), 11 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:38,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:38,925 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:38,926 INFO L175 Difference]: Start difference. First operand has 265 places, 433 transitions, 8165 flow. Second operand 11 states and 1858 transitions. [2023-01-27 20:08:38,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 469 transitions, 9516 flow [2023-01-27 20:08:39,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 469 transitions, 9085 flow, removed 118 selfloop flow, removed 9 redundant places. [2023-01-27 20:08:39,227 INFO L231 Difference]: Finished difference. Result has 269 places, 436 transitions, 8440 flow [2023-01-27 20:08:39,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=7774, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8440, PETRI_PLACES=269, PETRI_TRANSITIONS=436} [2023-01-27 20:08:39,228 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 246 predicate places. [2023-01-27 20:08:39,228 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 436 transitions, 8440 flow [2023-01-27 20:08:39,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.26315789473685) internal successors, (3140), 19 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:39,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:39,228 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:39,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:39,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-01-27 20:08:39,434 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:39,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:39,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1007976255, now seen corresponding path program 23 times [2023-01-27 20:08:39,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:39,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062495681] [2023-01-27 20:08:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:39,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:40,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:40,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062495681] [2023-01-27 20:08:40,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062495681] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:40,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171425623] [2023-01-27 20:08:40,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:08:40,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:40,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:40,172 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:40,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-27 20:08:40,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:08:40,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:08:40,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:08:40,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:40,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:08:40,515 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 46 treesize of output 30 [2023-01-27 20:08:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:40,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:40,851 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:08:40,851 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 32 treesize of output 48 [2023-01-27 20:08:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:40,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171425623] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:40,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:40,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-27 20:08:40,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900116712] [2023-01-27 20:08:40,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:40,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:08:40,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:40,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:08:40,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:08:40,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:08:40,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 436 transitions, 8440 flow. Second operand has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:40,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:40,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:08:40,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:42,075 INFO L130 PetriNetUnfolder]: 1745/3165 cut-off events. [2023-01-27 20:08:42,075 INFO L131 PetriNetUnfolder]: For 60343/60343 co-relation queries the response was YES. [2023-01-27 20:08:42,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28475 conditions, 3165 events. 1745/3165 cut-off events. For 60343/60343 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 20697 event pairs, 375 based on Foata normal form. 8/3173 useless extension candidates. Maximal degree in co-relation 28324. Up to 1775 conditions per place. [2023-01-27 20:08:42,110 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 275 selfloop transitions, 222 changer transitions 4/501 dead transitions. [2023-01-27 20:08:42,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 501 transitions, 10350 flow [2023-01-27 20:08:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:08:42,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:08:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2196 transitions. [2023-01-27 20:08:42,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3454459650778669 [2023-01-27 20:08:42,113 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2196 transitions. [2023-01-27 20:08:42,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2196 transitions. [2023-01-27 20:08:42,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:42,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2196 transitions. [2023-01-27 20:08:42,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:42,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:42,132 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:42,145 INFO L175 Difference]: Start difference. First operand has 269 places, 436 transitions, 8440 flow. Second operand 13 states and 2196 transitions. [2023-01-27 20:08:42,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 501 transitions, 10350 flow [2023-01-27 20:08:42,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 501 transitions, 10254 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-01-27 20:08:42,397 INFO L231 Difference]: Finished difference. Result has 274 places, 442 transitions, 8957 flow [2023-01-27 20:08:42,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=8352, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8957, PETRI_PLACES=274, PETRI_TRANSITIONS=442} [2023-01-27 20:08:42,398 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 251 predicate places. [2023-01-27 20:08:42,399 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 442 transitions, 8957 flow [2023-01-27 20:08:42,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:42,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:42,399 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:42,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:42,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:42,606 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:42,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:42,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1185029791, now seen corresponding path program 24 times [2023-01-27 20:08:42,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:42,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926404987] [2023-01-27 20:08:42,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:42,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:43,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:43,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926404987] [2023-01-27 20:08:43,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926404987] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:43,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626778453] [2023-01-27 20:08:43,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:08:43,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:43,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:43,153 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:43,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-27 20:08:43,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 20:08:43,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:08:43,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:08:43,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:43,658 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 39 treesize of output 23 [2023-01-27 20:08:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:43,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:43,905 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:08:43,905 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 32 treesize of output 48 [2023-01-27 20:08:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:43,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626778453] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:43,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:43,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-27 20:08:43,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212611315] [2023-01-27 20:08:43,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:43,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:08:43,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:43,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:08:43,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:08:43,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:08:43,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 442 transitions, 8957 flow. Second operand has 19 states, 19 states have (on average 165.21052631578948) internal successors, (3139), 19 states have internal predecessors, (3139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:43,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:43,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:08:43,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:45,108 INFO L130 PetriNetUnfolder]: 1809/3277 cut-off events. [2023-01-27 20:08:45,108 INFO L131 PetriNetUnfolder]: For 68222/68222 co-relation queries the response was YES. [2023-01-27 20:08:45,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30695 conditions, 3277 events. 1809/3277 cut-off events. For 68222/68222 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 21571 event pairs, 402 based on Foata normal form. 12/3289 useless extension candidates. Maximal degree in co-relation 30544. Up to 1895 conditions per place. [2023-01-27 20:08:45,147 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 279 selfloop transitions, 224 changer transitions 2/505 dead transitions. [2023-01-27 20:08:45,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 505 transitions, 11007 flow [2023-01-27 20:08:45,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:08:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:08:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1856 transitions. [2023-01-27 20:08:45,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34504554749953525 [2023-01-27 20:08:45,149 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1856 transitions. [2023-01-27 20:08:45,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1856 transitions. [2023-01-27 20:08:45,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:45,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1856 transitions. [2023-01-27 20:08:45,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.72727272727272) internal successors, (1856), 11 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:45,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:45,153 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:45,153 INFO L175 Difference]: Start difference. First operand has 274 places, 442 transitions, 8957 flow. Second operand 11 states and 1856 transitions. [2023-01-27 20:08:45,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 505 transitions, 11007 flow [2023-01-27 20:08:45,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 505 transitions, 10789 flow, removed 19 selfloop flow, removed 7 redundant places. [2023-01-27 20:08:45,537 INFO L231 Difference]: Finished difference. Result has 279 places, 453 transitions, 9713 flow [2023-01-27 20:08:45,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=8745, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9713, PETRI_PLACES=279, PETRI_TRANSITIONS=453} [2023-01-27 20:08:45,538 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 256 predicate places. [2023-01-27 20:08:45,538 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 453 transitions, 9713 flow [2023-01-27 20:08:45,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.21052631578948) internal successors, (3139), 19 states have internal predecessors, (3139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:45,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:45,538 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:45,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:45,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:45,749 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:45,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:45,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1140820281, now seen corresponding path program 25 times [2023-01-27 20:08:45,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:45,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187377233] [2023-01-27 20:08:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:45,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:46,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:46,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187377233] [2023-01-27 20:08:46,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187377233] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:46,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707831766] [2023-01-27 20:08:46,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:08:46,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:46,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:46,438 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:46,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-27 20:08:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:46,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:08:46,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:46,837 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:08:46,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-27 20:08:46,845 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:08:46,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:08:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:46,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:47,138 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:08:47,139 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 32 treesize of output 48 [2023-01-27 20:08:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:47,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707831766] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:47,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:47,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-27 20:08:47,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443763966] [2023-01-27 20:08:47,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:47,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:08:47,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:47,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:08:47,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:08:47,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:08:47,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 453 transitions, 9713 flow. Second operand has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:47,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:47,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:08:47,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:49,051 INFO L130 PetriNetUnfolder]: 1881/3409 cut-off events. [2023-01-27 20:08:49,051 INFO L131 PetriNetUnfolder]: For 79366/79366 co-relation queries the response was YES. [2023-01-27 20:08:49,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33448 conditions, 3409 events. 1881/3409 cut-off events. For 79366/79366 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 22656 event pairs, 390 based on Foata normal form. 8/3417 useless extension candidates. Maximal degree in co-relation 33294. Up to 1861 conditions per place. [2023-01-27 20:08:49,093 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 290 selfloop transitions, 242 changer transitions 4/536 dead transitions. [2023-01-27 20:08:49,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 536 transitions, 12059 flow [2023-01-27 20:08:49,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 20:08:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 20:08:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2864 transitions. [2023-01-27 20:08:49,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34452063033802477 [2023-01-27 20:08:49,096 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2864 transitions. [2023-01-27 20:08:49,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2864 transitions. [2023-01-27 20:08:49,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:49,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2864 transitions. [2023-01-27 20:08:49,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 168.47058823529412) internal successors, (2864), 17 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:49,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:49,105 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:49,105 INFO L175 Difference]: Start difference. First operand has 279 places, 453 transitions, 9713 flow. Second operand 17 states and 2864 transitions. [2023-01-27 20:08:49,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 536 transitions, 12059 flow [2023-01-27 20:08:49,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 536 transitions, 11721 flow, removed 30 selfloop flow, removed 6 redundant places. [2023-01-27 20:08:49,428 INFO L231 Difference]: Finished difference. Result has 292 places, 463 transitions, 10236 flow [2023-01-27 20:08:49,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=9401, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10236, PETRI_PLACES=292, PETRI_TRANSITIONS=463} [2023-01-27 20:08:49,428 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 269 predicate places. [2023-01-27 20:08:49,428 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 463 transitions, 10236 flow [2023-01-27 20:08:49,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:49,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:49,429 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:49,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:49,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:49,634 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:49,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:49,635 INFO L85 PathProgramCache]: Analyzing trace with hash 840106411, now seen corresponding path program 26 times [2023-01-27 20:08:49,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:49,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050612712] [2023-01-27 20:08:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:49,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:50,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:50,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050612712] [2023-01-27 20:08:50,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050612712] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:50,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034880749] [2023-01-27 20:08:50,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:08:50,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:50,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:50,513 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:50,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-27 20:08:50,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:08:50,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:08:50,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:08:50,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:50,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:08:50,920 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 46 treesize of output 30 [2023-01-27 20:08:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:50,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:51,205 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:08:51,206 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 32 treesize of output 48 [2023-01-27 20:08:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:51,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034880749] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:51,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:51,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:08:51,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575931772] [2023-01-27 20:08:51,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:51,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:08:51,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:51,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:08:51,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:08:51,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:08:51,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 463 transitions, 10236 flow. Second operand has 20 states, 20 states have (on average 165.3) internal successors, (3306), 20 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:51,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:51,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:08:51,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:52,909 INFO L130 PetriNetUnfolder]: 1897/3429 cut-off events. [2023-01-27 20:08:52,910 INFO L131 PetriNetUnfolder]: For 82240/82240 co-relation queries the response was YES. [2023-01-27 20:08:52,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34570 conditions, 3429 events. 1897/3429 cut-off events. For 82240/82240 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 22764 event pairs, 429 based on Foata normal form. 8/3437 useless extension candidates. Maximal degree in co-relation 34412. Up to 2131 conditions per place. [2023-01-27 20:08:52,949 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 278 selfloop transitions, 233 changer transitions 8/519 dead transitions. [2023-01-27 20:08:52,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 519 transitions, 12036 flow [2023-01-27 20:08:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 20:08:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 20:08:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2688 transitions. [2023-01-27 20:08:52,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34355828220858897 [2023-01-27 20:08:52,952 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2688 transitions. [2023-01-27 20:08:52,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2688 transitions. [2023-01-27 20:08:52,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:52,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2688 transitions. [2023-01-27 20:08:52,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 168.0) internal successors, (2688), 16 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:52,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:52,958 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:52,958 INFO L175 Difference]: Start difference. First operand has 292 places, 463 transitions, 10236 flow. Second operand 16 states and 2688 transitions. [2023-01-27 20:08:52,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 519 transitions, 12036 flow [2023-01-27 20:08:53,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 519 transitions, 11713 flow, removed 71 selfloop flow, removed 8 redundant places. [2023-01-27 20:08:53,298 INFO L231 Difference]: Finished difference. Result has 300 places, 463 transitions, 10487 flow [2023-01-27 20:08:53,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=9881, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10487, PETRI_PLACES=300, PETRI_TRANSITIONS=463} [2023-01-27 20:08:53,298 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 277 predicate places. [2023-01-27 20:08:53,298 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 463 transitions, 10487 flow [2023-01-27 20:08:53,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.3) internal successors, (3306), 20 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:53,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:53,299 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:53,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:53,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-01-27 20:08:53,505 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:53,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:53,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2084366075, now seen corresponding path program 27 times [2023-01-27 20:08:53,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:53,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113776697] [2023-01-27 20:08:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:53,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:54,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:54,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113776697] [2023-01-27 20:08:54,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113776697] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:54,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085733731] [2023-01-27 20:08:54,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:08:54,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:54,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:54,197 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:54,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-27 20:08:54,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:08:54,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:08:54,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:08:54,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:54,702 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:08:54,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-27 20:08:54,710 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:08:54,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:08:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:54,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:54,996 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:08:54,997 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 32 treesize of output 48 [2023-01-27 20:08:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:55,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085733731] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:55,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:55,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:08:55,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340182946] [2023-01-27 20:08:55,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:55,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:08:55,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:55,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:08:55,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:08:55,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:08:55,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 463 transitions, 10487 flow. Second operand has 20 states, 20 states have (on average 165.3) internal successors, (3306), 20 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:55,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:55,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:08:55,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:08:56,347 INFO L130 PetriNetUnfolder]: 1869/3363 cut-off events. [2023-01-27 20:08:56,347 INFO L131 PetriNetUnfolder]: For 82079/82079 co-relation queries the response was YES. [2023-01-27 20:08:56,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34922 conditions, 3363 events. 1869/3363 cut-off events. For 82079/82079 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 22134 event pairs, 405 based on Foata normal form. 8/3371 useless extension candidates. Maximal degree in co-relation 34762. Up to 2021 conditions per place. [2023-01-27 20:08:56,390 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 280 selfloop transitions, 225 changer transitions 9/514 dead transitions. [2023-01-27 20:08:56,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 514 transitions, 12201 flow [2023-01-27 20:08:56,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:08:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:08:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2357 transitions. [2023-01-27 20:08:56,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34428863569967866 [2023-01-27 20:08:56,409 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2357 transitions. [2023-01-27 20:08:56,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2357 transitions. [2023-01-27 20:08:56,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:08:56,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2357 transitions. [2023-01-27 20:08:56,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 168.35714285714286) internal successors, (2357), 14 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:56,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:56,414 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:56,414 INFO L175 Difference]: Start difference. First operand has 300 places, 463 transitions, 10487 flow. Second operand 14 states and 2357 transitions. [2023-01-27 20:08:56,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 514 transitions, 12201 flow [2023-01-27 20:08:56,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 514 transitions, 11670 flow, removed 13 selfloop flow, removed 15 redundant places. [2023-01-27 20:08:56,779 INFO L231 Difference]: Finished difference. Result has 295 places, 459 transitions, 10362 flow [2023-01-27 20:08:56,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=9948, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10362, PETRI_PLACES=295, PETRI_TRANSITIONS=459} [2023-01-27 20:08:56,798 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 272 predicate places. [2023-01-27 20:08:56,799 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 459 transitions, 10362 flow [2023-01-27 20:08:56,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.3) internal successors, (3306), 20 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:56,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:08:56,799 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:08:56,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-27 20:08:57,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-27 20:08:57,010 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:08:57,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:08:57,010 INFO L85 PathProgramCache]: Analyzing trace with hash -691507321, now seen corresponding path program 28 times [2023-01-27 20:08:57,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:08:57,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417189128] [2023-01-27 20:08:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:08:57,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:08:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:08:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:57,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:08:57,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417189128] [2023-01-27 20:08:57,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417189128] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:08:57,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104903760] [2023-01-27 20:08:57,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:08:57,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:08:57,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:08:57,605 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:08:57,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-27 20:08:57,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:08:57,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:08:57,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:08:57,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:08:57,954 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:08:57,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-27 20:08:57,961 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:08:57,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:08:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:58,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:08:58,204 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 20:08:58,204 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 82 treesize of output 99 [2023-01-27 20:08:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:08:58,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104903760] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:08:58,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:08:58,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:08:58,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619899412] [2023-01-27 20:08:58,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:08:58,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:08:58,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:08:58,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:08:58,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:08:58,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:08:58,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 459 transitions, 10362 flow. Second operand has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:08:58,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:08:58,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:08:58,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:09:00,146 INFO L130 PetriNetUnfolder]: 2003/3611 cut-off events. [2023-01-27 20:09:00,146 INFO L131 PetriNetUnfolder]: For 93253/93253 co-relation queries the response was YES. [2023-01-27 20:09:00,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38167 conditions, 3611 events. 2003/3611 cut-off events. For 93253/93253 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 24150 event pairs, 353 based on Foata normal form. 8/3619 useless extension candidates. Maximal degree in co-relation 38008. Up to 1839 conditions per place. [2023-01-27 20:09:00,192 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 289 selfloop transitions, 269 changer transitions 7/565 dead transitions. [2023-01-27 20:09:00,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 565 transitions, 13338 flow [2023-01-27 20:09:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 20:09:00,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 20:09:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3698 transitions. [2023-01-27 20:09:00,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34374419036995724 [2023-01-27 20:09:00,196 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3698 transitions. [2023-01-27 20:09:00,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3698 transitions. [2023-01-27 20:09:00,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:09:00,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3698 transitions. [2023-01-27 20:09:00,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 168.0909090909091) internal successors, (3698), 22 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:00,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:00,207 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:00,207 INFO L175 Difference]: Start difference. First operand has 295 places, 459 transitions, 10362 flow. Second operand 22 states and 3698 transitions. [2023-01-27 20:09:00,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 565 transitions, 13338 flow [2023-01-27 20:09:00,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 565 transitions, 13035 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-01-27 20:09:00,588 INFO L231 Difference]: Finished difference. Result has 308 places, 484 transitions, 11514 flow [2023-01-27 20:09:00,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=10075, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11514, PETRI_PLACES=308, PETRI_TRANSITIONS=484} [2023-01-27 20:09:00,589 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 285 predicate places. [2023-01-27 20:09:00,590 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 484 transitions, 11514 flow [2023-01-27 20:09:00,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:00,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:09:00,590 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:09:00,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-27 20:09:00,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:00,796 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:09:00,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:09:00,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1064638639, now seen corresponding path program 29 times [2023-01-27 20:09:00,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:09:00,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543930528] [2023-01-27 20:09:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:09:00,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:09:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:09:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:01,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:09:01,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543930528] [2023-01-27 20:09:01,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543930528] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:09:01,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461682089] [2023-01-27 20:09:01,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:09:01,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:01,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:09:01,393 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:09:01,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-27 20:09:01,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:09:01,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:09:01,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:09:01,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:09:01,993 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:09:01,993 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 60 treesize of output 32 [2023-01-27 20:09:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:02,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:09:02,166 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:09:02,166 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 40 treesize of output 56 [2023-01-27 20:09:02,184 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:09:02,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:09:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:02,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461682089] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:09:02,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:09:02,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-27 20:09:02,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871221559] [2023-01-27 20:09:02,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:09:02,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:09:02,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:09:02,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:09:02,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:09:02,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:09:02,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 484 transitions, 11514 flow. Second operand has 19 states, 19 states have (on average 165.31578947368422) internal successors, (3141), 19 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:02,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:09:02,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:09:02,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:09:03,545 INFO L130 PetriNetUnfolder]: 1993/3591 cut-off events. [2023-01-27 20:09:03,545 INFO L131 PetriNetUnfolder]: For 101672/101672 co-relation queries the response was YES. [2023-01-27 20:09:03,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39056 conditions, 3591 events. 1993/3591 cut-off events. For 101672/101672 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 24010 event pairs, 512 based on Foata normal form. 8/3599 useless extension candidates. Maximal degree in co-relation 38892. Up to 2519 conditions per place. [2023-01-27 20:09:03,594 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 215 selfloop transitions, 285 changer transitions 11/511 dead transitions. [2023-01-27 20:09:03,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 511 transitions, 12806 flow [2023-01-27 20:09:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:09:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:09:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1857 transitions. [2023-01-27 20:09:03,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3452314556609035 [2023-01-27 20:09:03,596 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1857 transitions. [2023-01-27 20:09:03,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1857 transitions. [2023-01-27 20:09:03,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:09:03,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1857 transitions. [2023-01-27 20:09:03,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.8181818181818) internal successors, (1857), 11 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:03,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:03,600 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:03,600 INFO L175 Difference]: Start difference. First operand has 308 places, 484 transitions, 11514 flow. Second operand 11 states and 1857 transitions. [2023-01-27 20:09:03,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 511 transitions, 12806 flow [2023-01-27 20:09:04,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 511 transitions, 12331 flow, removed 100 selfloop flow, removed 10 redundant places. [2023-01-27 20:09:04,057 INFO L231 Difference]: Finished difference. Result has 310 places, 485 transitions, 11879 flow [2023-01-27 20:09:04,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=11039, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11879, PETRI_PLACES=310, PETRI_TRANSITIONS=485} [2023-01-27 20:09:04,058 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 287 predicate places. [2023-01-27 20:09:04,058 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 485 transitions, 11879 flow [2023-01-27 20:09:04,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.31578947368422) internal successors, (3141), 19 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:04,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:09:04,058 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:09:04,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-27 20:09:04,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-27 20:09:04,264 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:09:04,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:09:04,264 INFO L85 PathProgramCache]: Analyzing trace with hash 844197721, now seen corresponding path program 30 times [2023-01-27 20:09:04,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:09:04,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60336002] [2023-01-27 20:09:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:09:04,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:09:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:09:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:04,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:09:04,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60336002] [2023-01-27 20:09:04,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60336002] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:09:04,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475600332] [2023-01-27 20:09:04,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:09:04,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:04,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:09:04,718 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:09:04,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-27 20:09:04,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 20:09:04,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:09:04,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 63 conjunts are in the unsatisfiable core [2023-01-27 20:09:04,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:09:05,134 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 39 treesize of output 23 [2023-01-27 20:09:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 20:09:05,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:09:05,317 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:09:05,317 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 40 treesize of output 56 [2023-01-27 20:09:05,333 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:09:05,334 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 20 treesize of output 4 [2023-01-27 20:09:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:05,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475600332] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:09:05,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:09:05,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 8] total 24 [2023-01-27 20:09:05,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206481219] [2023-01-27 20:09:05,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:09:05,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 20:09:05,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:09:05,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 20:09:05,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:09:05,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 489 [2023-01-27 20:09:05,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 485 transitions, 11879 flow. Second operand has 24 states, 24 states have (on average 155.0) internal successors, (3720), 24 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:05,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:09:05,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 489 [2023-01-27 20:09:05,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:09:07,084 INFO L130 PetriNetUnfolder]: 2013/3597 cut-off events. [2023-01-27 20:09:07,084 INFO L131 PetriNetUnfolder]: For 106759/106759 co-relation queries the response was YES. [2023-01-27 20:09:07,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39996 conditions, 3597 events. 2013/3597 cut-off events. For 106759/106759 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 23785 event pairs, 394 based on Foata normal form. 12/3609 useless extension candidates. Maximal degree in co-relation 39837. Up to 1982 conditions per place. [2023-01-27 20:09:07,129 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 266 selfloop transitions, 268 changer transitions 2/536 dead transitions. [2023-01-27 20:09:07,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 536 transitions, 13787 flow [2023-01-27 20:09:07,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 20:09:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 20:09:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2674 transitions. [2023-01-27 20:09:07,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.321664862263924 [2023-01-27 20:09:07,146 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2674 transitions. [2023-01-27 20:09:07,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2674 transitions. [2023-01-27 20:09:07,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:09:07,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2674 transitions. [2023-01-27 20:09:07,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 157.2941176470588) internal successors, (2674), 17 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:07,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:07,164 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:07,164 INFO L175 Difference]: Start difference. First operand has 310 places, 485 transitions, 11879 flow. Second operand 17 states and 2674 transitions. [2023-01-27 20:09:07,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 536 transitions, 13787 flow [2023-01-27 20:09:07,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 536 transitions, 13529 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-01-27 20:09:07,598 INFO L231 Difference]: Finished difference. Result has 319 places, 488 transitions, 12524 flow [2023-01-27 20:09:07,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=11627, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=12524, PETRI_PLACES=319, PETRI_TRANSITIONS=488} [2023-01-27 20:09:07,600 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 296 predicate places. [2023-01-27 20:09:07,600 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 488 transitions, 12524 flow [2023-01-27 20:09:07,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 155.0) internal successors, (3720), 24 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:07,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:09:07,601 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:09:07,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-27 20:09:07,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-27 20:09:07,807 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:09:07,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:09:07,807 INFO L85 PathProgramCache]: Analyzing trace with hash 799988211, now seen corresponding path program 31 times [2023-01-27 20:09:07,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:09:07,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471723773] [2023-01-27 20:09:07,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:09:07,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:09:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:09:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:08,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:09:08,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471723773] [2023-01-27 20:09:08,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471723773] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:09:08,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126015937] [2023-01-27 20:09:08,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:09:08,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:08,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:09:08,326 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:09:08,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-27 20:09:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:09:08,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:09:08,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:09:08,645 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:09:08,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-27 20:09:08,658 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:09:08,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:09:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:08,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:09:08,870 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:09:08,871 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 40 treesize of output 56 [2023-01-27 20:09:08,885 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:09:08,885 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 20 treesize of output 4 [2023-01-27 20:09:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:08,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126015937] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:09:08,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:09:08,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-27 20:09:08,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808754036] [2023-01-27 20:09:08,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:09:08,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:09:08,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:09:08,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:09:08,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:09:08,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:09:08,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 488 transitions, 12524 flow. Second operand has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:08,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:09:08,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:09:08,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:09:10,755 INFO L130 PetriNetUnfolder]: 2085/3729 cut-off events. [2023-01-27 20:09:10,755 INFO L131 PetriNetUnfolder]: For 121695/121695 co-relation queries the response was YES. [2023-01-27 20:09:10,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43062 conditions, 3729 events. 2085/3729 cut-off events. For 121695/121695 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 24900 event pairs, 384 based on Foata normal form. 8/3737 useless extension candidates. Maximal degree in co-relation 42883. Up to 1959 conditions per place. [2023-01-27 20:09:10,809 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 290 selfloop transitions, 273 changer transitions 4/567 dead transitions. [2023-01-27 20:09:10,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 567 transitions, 14986 flow [2023-01-27 20:09:10,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 20:09:10,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 20:09:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3027 transitions. [2023-01-27 20:09:10,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34389911383776417 [2023-01-27 20:09:10,812 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3027 transitions. [2023-01-27 20:09:10,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3027 transitions. [2023-01-27 20:09:10,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:09:10,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3027 transitions. [2023-01-27 20:09:10,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 168.16666666666666) internal successors, (3027), 18 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:10,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:10,818 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:10,818 INFO L175 Difference]: Start difference. First operand has 319 places, 488 transitions, 12524 flow. Second operand 18 states and 3027 transitions. [2023-01-27 20:09:10,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 567 transitions, 14986 flow [2023-01-27 20:09:11,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 567 transitions, 14856 flow, removed 24 selfloop flow, removed 10 redundant places. [2023-01-27 20:09:11,506 INFO L231 Difference]: Finished difference. Result has 329 places, 498 transitions, 13384 flow [2023-01-27 20:09:11,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=12410, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13384, PETRI_PLACES=329, PETRI_TRANSITIONS=498} [2023-01-27 20:09:11,507 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 306 predicate places. [2023-01-27 20:09:11,507 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 498 transitions, 13384 flow [2023-01-27 20:09:11,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:11,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:09:11,508 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:09:11,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-27 20:09:11,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-27 20:09:11,726 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:09:11,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:09:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash -570506599, now seen corresponding path program 32 times [2023-01-27 20:09:11,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:09:11,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403476030] [2023-01-27 20:09:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:09:11,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:09:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:09:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:12,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:09:12,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403476030] [2023-01-27 20:09:12,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403476030] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:09:12,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654635500] [2023-01-27 20:09:12,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:09:12,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:12,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:09:12,276 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:09:12,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-27 20:09:12,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:09:12,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:09:12,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:09:12,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:09:12,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:09:12,623 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 46 treesize of output 30 [2023-01-27 20:09:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:12,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:09:12,822 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:09:12,823 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 40 treesize of output 56 [2023-01-27 20:09:12,845 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:09:12,845 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 20 treesize of output 4 [2023-01-27 20:09:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:12,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654635500] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:09:12,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:09:12,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-27 20:09:12,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377132437] [2023-01-27 20:09:12,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:09:12,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:09:12,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:09:12,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:09:12,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:09:12,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:09:12,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 498 transitions, 13384 flow. Second operand has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:12,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:09:12,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:09:12,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:09:14,391 INFO L130 PetriNetUnfolder]: 2133/3821 cut-off events. [2023-01-27 20:09:14,392 INFO L131 PetriNetUnfolder]: For 139890/139890 co-relation queries the response was YES. [2023-01-27 20:09:14,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45639 conditions, 3821 events. 2133/3821 cut-off events. For 139890/139890 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 25704 event pairs, 410 based on Foata normal form. 8/3829 useless extension candidates. Maximal degree in co-relation 45467. Up to 2077 conditions per place. [2023-01-27 20:09:14,437 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 275 selfloop transitions, 276 changer transitions 2/553 dead transitions. [2023-01-27 20:09:14,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 553 transitions, 15379 flow [2023-01-27 20:09:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:09:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:09:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2358 transitions. [2023-01-27 20:09:14,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3444347063978966 [2023-01-27 20:09:14,439 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2358 transitions. [2023-01-27 20:09:14,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2358 transitions. [2023-01-27 20:09:14,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:09:14,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2358 transitions. [2023-01-27 20:09:14,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 168.42857142857142) internal successors, (2358), 14 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:14,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:14,445 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:14,445 INFO L175 Difference]: Start difference. First operand has 329 places, 498 transitions, 13384 flow. Second operand 14 states and 2358 transitions. [2023-01-27 20:09:14,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 553 transitions, 15379 flow [2023-01-27 20:09:15,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 553 transitions, 15071 flow, removed 53 selfloop flow, removed 10 redundant places. [2023-01-27 20:09:15,178 INFO L231 Difference]: Finished difference. Result has 333 places, 504 transitions, 13844 flow [2023-01-27 20:09:15,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=13080, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13844, PETRI_PLACES=333, PETRI_TRANSITIONS=504} [2023-01-27 20:09:15,179 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 310 predicate places. [2023-01-27 20:09:15,179 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 504 transitions, 13844 flow [2023-01-27 20:09:15,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:15,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:09:15,180 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:09:15,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-27 20:09:15,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:15,387 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:09:15,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:09:15,388 INFO L85 PathProgramCache]: Analyzing trace with hash -675003441, now seen corresponding path program 33 times [2023-01-27 20:09:15,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:09:15,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561653189] [2023-01-27 20:09:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:09:15,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:09:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:09:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:15,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:09:15,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561653189] [2023-01-27 20:09:15,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561653189] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:09:15,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822007385] [2023-01-27 20:09:15,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:09:15,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:15,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:09:15,984 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:09:15,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-27 20:09:16,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:09:16,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:09:16,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-27 20:09:16,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:09:16,400 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:09:16,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:09:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:16,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:09:16,805 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 20:09:16,805 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 82 treesize of output 99 [2023-01-27 20:09:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:16,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822007385] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:09:16,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:09:16,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2023-01-27 20:09:16,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117116732] [2023-01-27 20:09:16,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:09:16,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 20:09:16,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:09:16,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 20:09:16,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:09:16,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-27 20:09:16,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 504 transitions, 13844 flow. Second operand has 24 states, 24 states have (on average 162.04166666666666) internal successors, (3889), 24 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:16,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:09:16,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-27 20:09:16,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:09:19,143 INFO L130 PetriNetUnfolder]: 2225/3961 cut-off events. [2023-01-27 20:09:19,143 INFO L131 PetriNetUnfolder]: For 144314/144314 co-relation queries the response was YES. [2023-01-27 20:09:19,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49125 conditions, 3961 events. 2225/3961 cut-off events. For 144314/144314 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 26584 event pairs, 232 based on Foata normal form. 20/3981 useless extension candidates. Maximal degree in co-relation 48951. Up to 2602 conditions per place. [2023-01-27 20:09:19,204 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 252 selfloop transitions, 321 changer transitions 1/574 dead transitions. [2023-01-27 20:09:19,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 574 transitions, 16307 flow [2023-01-27 20:09:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 20:09:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 20:09:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3468 transitions. [2023-01-27 20:09:19,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3377154542798715 [2023-01-27 20:09:19,208 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3468 transitions. [2023-01-27 20:09:19,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3468 transitions. [2023-01-27 20:09:19,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:09:19,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3468 transitions. [2023-01-27 20:09:19,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 165.14285714285714) internal successors, (3468), 21 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:19,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:19,224 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:19,224 INFO L175 Difference]: Start difference. First operand has 333 places, 504 transitions, 13844 flow. Second operand 21 states and 3468 transitions. [2023-01-27 20:09:19,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 574 transitions, 16307 flow [2023-01-27 20:09:19,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 574 transitions, 15689 flow, removed 22 selfloop flow, removed 10 redundant places. [2023-01-27 20:09:19,848 INFO L231 Difference]: Finished difference. Result has 346 places, 525 transitions, 15091 flow [2023-01-27 20:09:19,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=13182, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15091, PETRI_PLACES=346, PETRI_TRANSITIONS=525} [2023-01-27 20:09:19,849 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 323 predicate places. [2023-01-27 20:09:19,849 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 525 transitions, 15091 flow [2023-01-27 20:09:19,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 162.04166666666666) internal successors, (3889), 24 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:19,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:09:19,850 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:09:19,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-01-27 20:09:20,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:20,059 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:09:20,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:09:20,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1970984051, now seen corresponding path program 34 times [2023-01-27 20:09:20,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:09:20,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211277065] [2023-01-27 20:09:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:09:20,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:09:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:09:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:20,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:09:20,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211277065] [2023-01-27 20:09:20,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211277065] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:09:20,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308700012] [2023-01-27 20:09:20,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:09:20,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:20,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:09:20,497 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:09:20,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-27 20:09:20,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:09:20,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:09:20,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:09:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:09:20,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:09:20,845 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 58 treesize of output 51 [2023-01-27 20:09:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:20,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:09:21,059 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:09:21,059 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 40 treesize of output 56 [2023-01-27 20:09:21,073 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:09:21,074 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 20 treesize of output 4 [2023-01-27 20:09:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:21,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308700012] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:09:21,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:09:21,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:09:21,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000769846] [2023-01-27 20:09:21,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:09:21,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:09:21,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:09:21,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:09:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:09:21,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:09:21,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 525 transitions, 15091 flow. Second operand has 20 states, 20 states have (on average 165.25) internal successors, (3305), 20 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:21,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:09:21,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:09:21,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:09:22,628 INFO L130 PetriNetUnfolder]: 2205/3921 cut-off events. [2023-01-27 20:09:22,628 INFO L131 PetriNetUnfolder]: For 156501/156501 co-relation queries the response was YES. [2023-01-27 20:09:22,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50291 conditions, 3921 events. 2205/3921 cut-off events. For 156501/156501 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 26305 event pairs, 441 based on Foata normal form. 8/3929 useless extension candidates. Maximal degree in co-relation 50113. Up to 2251 conditions per place. [2023-01-27 20:09:22,688 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 295 selfloop transitions, 270 changer transitions 8/573 dead transitions. [2023-01-27 20:09:22,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 573 transitions, 16934 flow [2023-01-27 20:09:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:09:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:09:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2193 transitions. [2023-01-27 20:09:22,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3449740443605474 [2023-01-27 20:09:22,690 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2193 transitions. [2023-01-27 20:09:22,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2193 transitions. [2023-01-27 20:09:22,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:09:22,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2193 transitions. [2023-01-27 20:09:22,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.69230769230768) internal successors, (2193), 13 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:22,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:22,695 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:22,695 INFO L175 Difference]: Start difference. First operand has 346 places, 525 transitions, 15091 flow. Second operand 13 states and 2193 transitions. [2023-01-27 20:09:22,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 573 transitions, 16934 flow [2023-01-27 20:09:23,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 573 transitions, 16633 flow, removed 53 selfloop flow, removed 11 redundant places. [2023-01-27 20:09:23,389 INFO L231 Difference]: Finished difference. Result has 346 places, 522 transitions, 15300 flow [2023-01-27 20:09:23,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=14778, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15300, PETRI_PLACES=346, PETRI_TRANSITIONS=522} [2023-01-27 20:09:23,404 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 323 predicate places. [2023-01-27 20:09:23,404 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 522 transitions, 15300 flow [2023-01-27 20:09:23,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.25) internal successors, (3305), 20 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:23,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:09:23,404 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:09:23,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-01-27 20:09:23,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-01-27 20:09:23,610 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:09:23,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:09:23,610 INFO L85 PathProgramCache]: Analyzing trace with hash 499274341, now seen corresponding path program 35 times [2023-01-27 20:09:23,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:09:23,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437454843] [2023-01-27 20:09:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:09:23,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:09:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:09:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:24,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:09:24,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437454843] [2023-01-27 20:09:24,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437454843] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:09:24,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455057352] [2023-01-27 20:09:24,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:09:24,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:24,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:09:24,214 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:09:24,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-27 20:09:24,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:09:24,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:09:24,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-27 20:09:24,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:09:24,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:09:24,578 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 46 treesize of output 34 [2023-01-27 20:09:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:24,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:09:24,779 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:09:24,779 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 20 treesize of output 4 [2023-01-27 20:09:24,812 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:09:24,813 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 40 treesize of output 56 [2023-01-27 20:09:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:24,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455057352] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:09:24,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:09:24,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-01-27 20:09:24,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578564343] [2023-01-27 20:09:24,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:09:24,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 20:09:24,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:09:24,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 20:09:24,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:09:24,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:09:24,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 522 transitions, 15300 flow. Second operand has 24 states, 24 states have (on average 165.29166666666666) internal successors, (3967), 24 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:24,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:09:24,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:09:24,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:09:26,574 INFO L130 PetriNetUnfolder]: 2173/3851 cut-off events. [2023-01-27 20:09:26,575 INFO L131 PetriNetUnfolder]: For 164863/164863 co-relation queries the response was YES. [2023-01-27 20:09:26,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50681 conditions, 3851 events. 2173/3851 cut-off events. For 164863/164863 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 25621 event pairs, 417 based on Foata normal form. 8/3859 useless extension candidates. Maximal degree in co-relation 50503. Up to 2239 conditions per place. [2023-01-27 20:09:26,634 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 278 selfloop transitions, 281 changer transitions 6/565 dead transitions. [2023-01-27 20:09:26,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 565 transitions, 17051 flow [2023-01-27 20:09:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 20:09:26,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 20:09:26,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2685 transitions. [2023-01-27 20:09:26,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34317484662576686 [2023-01-27 20:09:26,636 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2685 transitions. [2023-01-27 20:09:26,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2685 transitions. [2023-01-27 20:09:26,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:09:26,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2685 transitions. [2023-01-27 20:09:26,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 167.8125) internal successors, (2685), 16 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:26,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:26,642 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:26,642 INFO L175 Difference]: Start difference. First operand has 346 places, 522 transitions, 15300 flow. Second operand 16 states and 2685 transitions. [2023-01-27 20:09:26,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 565 transitions, 17051 flow [2023-01-27 20:09:27,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 565 transitions, 16637 flow, removed 5 selfloop flow, removed 11 redundant places. [2023-01-27 20:09:27,368 INFO L231 Difference]: Finished difference. Result has 348 places, 519 transitions, 15415 flow [2023-01-27 20:09:27,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=14865, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=15415, PETRI_PLACES=348, PETRI_TRANSITIONS=519} [2023-01-27 20:09:27,369 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 325 predicate places. [2023-01-27 20:09:27,369 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 519 transitions, 15415 flow [2023-01-27 20:09:27,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 165.29166666666666) internal successors, (3967), 24 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:27,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:09:27,370 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:09:27,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-27 20:09:27,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-01-27 20:09:27,576 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:09:27,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:09:27,577 INFO L85 PathProgramCache]: Analyzing trace with hash 877654903, now seen corresponding path program 36 times [2023-01-27 20:09:27,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:09:27,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634652179] [2023-01-27 20:09:27,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:09:27,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:09:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:09:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:28,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:09:28,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634652179] [2023-01-27 20:09:28,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634652179] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:09:28,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759740313] [2023-01-27 20:09:28,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:09:28,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:28,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:09:28,209 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:09:28,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-27 20:09:28,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 20:09:28,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:09:28,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-27 20:09:28,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:09:28,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:09:28,572 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 14 treesize of output 16 [2023-01-27 20:09:28,690 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:09:28,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-27 20:09:28,697 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:09:28,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:09:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:28,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:09:29,130 WARN L839 $PredicateComparison]: unable to prove that (and (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_2903 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2903))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset)))))) (forall ((v_ArrVal_2903 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2903))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset)))))))) is different from false [2023-01-27 20:09:29,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:09:29,141 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 70 treesize of output 66 [2023-01-27 20:09:29,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:09:29,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-27 20:09:29,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:09:29,214 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 116 treesize of output 144 [2023-01-27 20:09:29,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:09:29,231 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 68 treesize of output 82 [2023-01-27 20:09:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:29,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759740313] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:09:29,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:09:29,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-01-27 20:09:29,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605258975] [2023-01-27 20:09:29,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:09:29,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 20:09:29,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:09:29,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 20:09:29,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=712, Unknown=1, NotChecked=54, Total=870 [2023-01-27 20:09:29,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-01-27 20:09:29,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 519 transitions, 15415 flow. Second operand has 30 states, 30 states have (on average 160.73333333333332) internal successors, (4822), 30 states have internal predecessors, (4822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:29,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:09:29,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-01-27 20:09:29,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:09:31,959 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 20:09:34,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 20:09:37,184 WARN L539 Checker$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 20:09:39,192 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 20:09:41,486 INFO L130 PetriNetUnfolder]: 2383/4269 cut-off events. [2023-01-27 20:09:41,486 INFO L131 PetriNetUnfolder]: For 183749/183749 co-relation queries the response was YES. [2023-01-27 20:09:41,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56598 conditions, 4269 events. 2383/4269 cut-off events. For 183749/183749 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 29200 event pairs, 359 based on Foata normal form. 40/4309 useless extension candidates. Maximal degree in co-relation 56421. Up to 1945 conditions per place. [2023-01-27 20:09:41,549 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 299 selfloop transitions, 349 changer transitions 5/653 dead transitions. [2023-01-27 20:09:41,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 653 transitions, 19434 flow [2023-01-27 20:09:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-27 20:09:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-27 20:09:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4115 transitions. [2023-01-27 20:09:41,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3366053169734151 [2023-01-27 20:09:41,559 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4115 transitions. [2023-01-27 20:09:41,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4115 transitions. [2023-01-27 20:09:41,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:09:41,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4115 transitions. [2023-01-27 20:09:41,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 164.6) internal successors, (4115), 25 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:41,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:41,568 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:41,568 INFO L175 Difference]: Start difference. First operand has 348 places, 519 transitions, 15415 flow. Second operand 25 states and 4115 transitions. [2023-01-27 20:09:41,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 653 transitions, 19434 flow [2023-01-27 20:09:42,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 653 transitions, 18849 flow, removed 48 selfloop flow, removed 12 redundant places. [2023-01-27 20:09:42,641 INFO L231 Difference]: Finished difference. Result has 370 places, 561 transitions, 17310 flow [2023-01-27 20:09:42,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=14880, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=17310, PETRI_PLACES=370, PETRI_TRANSITIONS=561} [2023-01-27 20:09:42,642 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 347 predicate places. [2023-01-27 20:09:42,642 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 561 transitions, 17310 flow [2023-01-27 20:09:42,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 160.73333333333332) internal successors, (4822), 30 states have internal predecessors, (4822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:42,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:09:42,643 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:09:42,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-27 20:09:42,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-01-27 20:09:42,848 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:09:42,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:09:42,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1282584341, now seen corresponding path program 37 times [2023-01-27 20:09:42,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:09:42,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102475055] [2023-01-27 20:09:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:09:42,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:09:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:09:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:43,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:09:43,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102475055] [2023-01-27 20:09:43,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102475055] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:09:43,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898617625] [2023-01-27 20:09:43,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:09:43,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:43,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:09:43,781 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:09:43,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-27 20:09:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:09:43,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 64 conjunts are in the unsatisfiable core [2023-01-27 20:09:43,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:09:44,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:09:44,155 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 14 treesize of output 16 [2023-01-27 20:09:44,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:09:44,402 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 46 treesize of output 30 [2023-01-27 20:09:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:44,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:09:44,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:09:44,798 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 116 treesize of output 144 [2023-01-27 20:09:44,816 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:09:44,816 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 68 treesize of output 82 [2023-01-27 20:09:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:45,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898617625] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:09:45,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:09:45,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-01-27 20:09:45,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721108422] [2023-01-27 20:09:45,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:09:45,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 20:09:45,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:09:45,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 20:09:45,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=812, Unknown=3, NotChecked=0, Total=930 [2023-01-27 20:09:45,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 489 [2023-01-27 20:09:45,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 561 transitions, 17310 flow. Second operand has 31 states, 31 states have (on average 154.74193548387098) internal successors, (4797), 31 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:45,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:09:45,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 489 [2023-01-27 20:09:45,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:09:49,551 INFO L130 PetriNetUnfolder]: 2601/4679 cut-off events. [2023-01-27 20:09:49,551 INFO L131 PetriNetUnfolder]: For 218619/218619 co-relation queries the response was YES. [2023-01-27 20:09:49,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64704 conditions, 4679 events. 2601/4679 cut-off events. For 218619/218619 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 32771 event pairs, 208 based on Foata normal form. 52/4731 useless extension candidates. Maximal degree in co-relation 64515. Up to 1566 conditions per place. [2023-01-27 20:09:49,620 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 303 selfloop transitions, 405 changer transitions 12/720 dead transitions. [2023-01-27 20:09:49,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 720 transitions, 22122 flow [2023-01-27 20:09:49,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 20:09:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 20:09:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4111 transitions. [2023-01-27 20:09:49,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32334434481673746 [2023-01-27 20:09:49,635 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4111 transitions. [2023-01-27 20:09:49,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4111 transitions. [2023-01-27 20:09:49,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:09:49,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4111 transitions. [2023-01-27 20:09:49,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 158.1153846153846) internal successors, (4111), 26 states have internal predecessors, (4111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:49,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:49,650 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:49,650 INFO L175 Difference]: Start difference. First operand has 370 places, 561 transitions, 17310 flow. Second operand 26 states and 4111 transitions. [2023-01-27 20:09:49,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 720 transitions, 22122 flow [2023-01-27 20:09:50,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 720 transitions, 20892 flow, removed 245 selfloop flow, removed 12 redundant places. [2023-01-27 20:09:50,700 INFO L231 Difference]: Finished difference. Result has 395 places, 614 transitions, 19234 flow [2023-01-27 20:09:50,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=16218, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=19234, PETRI_PLACES=395, PETRI_TRANSITIONS=614} [2023-01-27 20:09:50,701 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 372 predicate places. [2023-01-27 20:09:50,701 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 614 transitions, 19234 flow [2023-01-27 20:09:50,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 154.74193548387098) internal successors, (4797), 31 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:50,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:09:50,702 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:09:50,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-01-27 20:09:50,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-01-27 20:09:50,909 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:09:50,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:09:50,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1840882363, now seen corresponding path program 38 times [2023-01-27 20:09:50,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:09:50,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346638240] [2023-01-27 20:09:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:09:50,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:09:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:09:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:51,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:09:51,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346638240] [2023-01-27 20:09:51,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346638240] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:09:51,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933062557] [2023-01-27 20:09:51,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:09:51,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:51,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:09:51,617 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:09:51,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-27 20:09:51,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:09:51,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:09:51,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-27 20:09:51,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:09:52,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:09:52,063 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 14 treesize of output 16 [2023-01-27 20:09:52,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:09:52,162 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 46 treesize of output 30 [2023-01-27 20:09:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:52,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:09:52,432 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3045 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3045))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (not (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset))) (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|))))) (or (forall ((v_ArrVal_3045 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3045))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4))) is different from false [2023-01-27 20:09:52,462 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:09:52,462 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 116 treesize of output 144 [2023-01-27 20:09:52,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:09:52,479 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 68 treesize of output 82 [2023-01-27 20:09:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:09:52,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933062557] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:09:52,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:09:52,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-01-27 20:09:52,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613914653] [2023-01-27 20:09:52,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:09:52,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 20:09:52,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:09:52,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 20:09:52,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=605, Unknown=1, NotChecked=50, Total=756 [2023-01-27 20:09:52,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-01-27 20:09:52,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 614 transitions, 19234 flow. Second operand has 28 states, 28 states have (on average 160.78571428571428) internal successors, (4502), 28 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:52,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:09:52,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-01-27 20:09:52,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:09:57,258 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 20:09:59,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 20:10:00,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 20:10:02,594 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 20:10:06,749 INFO L130 PetriNetUnfolder]: 2605/4691 cut-off events. [2023-01-27 20:10:06,750 INFO L131 PetriNetUnfolder]: For 240170/240170 co-relation queries the response was YES. [2023-01-27 20:10:06,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66179 conditions, 4691 events. 2605/4691 cut-off events. For 240170/240170 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 32995 event pairs, 456 based on Foata normal form. 8/4699 useless extension candidates. Maximal degree in co-relation 65977. Up to 2441 conditions per place. [2023-01-27 20:10:06,831 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 309 selfloop transitions, 359 changer transitions 5/673 dead transitions. [2023-01-27 20:10:06,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 673 transitions, 21597 flow [2023-01-27 20:10:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:10:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:10:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2306 transitions. [2023-01-27 20:10:06,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3368390300905638 [2023-01-27 20:10:06,840 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2306 transitions. [2023-01-27 20:10:06,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2306 transitions. [2023-01-27 20:10:06,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:10:06,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2306 transitions. [2023-01-27 20:10:06,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 164.71428571428572) internal successors, (2306), 14 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:06,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:06,845 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:06,845 INFO L175 Difference]: Start difference. First operand has 395 places, 614 transitions, 19234 flow. Second operand 14 states and 2306 transitions. [2023-01-27 20:10:06,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 673 transitions, 21597 flow [2023-01-27 20:10:08,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 673 transitions, 20951 flow, removed 152 selfloop flow, removed 8 redundant places. [2023-01-27 20:10:08,182 INFO L231 Difference]: Finished difference. Result has 401 places, 621 transitions, 19571 flow [2023-01-27 20:10:08,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=18597, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=19571, PETRI_PLACES=401, PETRI_TRANSITIONS=621} [2023-01-27 20:10:08,183 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 378 predicate places. [2023-01-27 20:10:08,183 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 621 transitions, 19571 flow [2023-01-27 20:10:08,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.78571428571428) internal successors, (4502), 28 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:08,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:10:08,184 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:10:08,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-01-27 20:10:08,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:10:08,384 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:10:08,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:10:08,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1947435843, now seen corresponding path program 39 times [2023-01-27 20:10:08,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:10:08,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313371570] [2023-01-27 20:10:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:10:08,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:10:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:10:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:08,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:10:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313371570] [2023-01-27 20:10:08,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313371570] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:10:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741483281] [2023-01-27 20:10:08,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:10:08,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:10:08,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:10:08,971 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:10:08,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-27 20:10:09,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:10:09,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:10:09,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 65 conjunts are in the unsatisfiable core [2023-01-27 20:10:09,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:10:09,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:10:09,326 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 14 treesize of output 16 [2023-01-27 20:10:09,418 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:10:09,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-27 20:10:09,426 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:10:09,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:10:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:09,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:10:09,858 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_3116 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3116))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_3116 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3116))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset)))))))) is different from false [2023-01-27 20:10:09,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:09,887 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 116 treesize of output 144 [2023-01-27 20:10:09,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:09,904 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 68 treesize of output 82 [2023-01-27 20:10:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:10,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741483281] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:10:10,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:10:10,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-01-27 20:10:10,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647560562] [2023-01-27 20:10:10,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:10:10,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 20:10:10,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:10:10,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 20:10:10,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=765, Unknown=1, NotChecked=56, Total=930 [2023-01-27 20:10:10,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-01-27 20:10:10,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 621 transitions, 19571 flow. Second operand has 31 states, 31 states have (on average 157.8709677419355) internal successors, (4894), 31 states have internal predecessors, (4894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:10,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:10:10,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-01-27 20:10:10,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:10:12,936 INFO L130 PetriNetUnfolder]: 2561/4595 cut-off events. [2023-01-27 20:10:12,936 INFO L131 PetriNetUnfolder]: For 228979/228979 co-relation queries the response was YES. [2023-01-27 20:10:12,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65245 conditions, 4595 events. 2561/4595 cut-off events. For 228979/228979 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 31969 event pairs, 265 based on Foata normal form. 32/4627 useless extension candidates. Maximal degree in co-relation 65041. Up to 2496 conditions per place. [2023-01-27 20:10:13,015 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 347 selfloop transitions, 319 changer transitions 16/682 dead transitions. [2023-01-27 20:10:13,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 682 transitions, 21699 flow [2023-01-27 20:10:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 20:10:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 20:10:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3220 transitions. [2023-01-27 20:10:13,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3292433537832311 [2023-01-27 20:10:13,034 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3220 transitions. [2023-01-27 20:10:13,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3220 transitions. [2023-01-27 20:10:13,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:10:13,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3220 transitions. [2023-01-27 20:10:13,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 161.0) internal successors, (3220), 20 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:13,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:13,041 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:13,041 INFO L175 Difference]: Start difference. First operand has 401 places, 621 transitions, 19571 flow. Second operand 20 states and 3220 transitions. [2023-01-27 20:10:13,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 682 transitions, 21699 flow [2023-01-27 20:10:14,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 682 transitions, 20816 flow, removed 36 selfloop flow, removed 10 redundant places. [2023-01-27 20:10:14,291 INFO L231 Difference]: Finished difference. Result has 412 places, 613 transitions, 19115 flow [2023-01-27 20:10:14,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=18475, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=19115, PETRI_PLACES=412, PETRI_TRANSITIONS=613} [2023-01-27 20:10:14,293 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 389 predicate places. [2023-01-27 20:10:14,293 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 613 transitions, 19115 flow [2023-01-27 20:10:14,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 157.8709677419355) internal successors, (4894), 31 states have internal predecessors, (4894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:14,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:10:14,294 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:10:14,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-01-27 20:10:14,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-01-27 20:10:14,506 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:10:14,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:10:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1942602015, now seen corresponding path program 40 times [2023-01-27 20:10:14,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:10:14,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763247608] [2023-01-27 20:10:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:10:14,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:10:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:10:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:15,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:10:15,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763247608] [2023-01-27 20:10:15,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763247608] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:10:15,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946774636] [2023-01-27 20:10:15,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:10:15,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:10:15,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:10:15,254 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:10:15,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-27 20:10:15,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:10:15,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:10:15,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-27 20:10:15,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:10:15,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:10:15,619 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 14 treesize of output 16 [2023-01-27 20:10:15,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:15,744 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 65 treesize of output 41 [2023-01-27 20:10:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:15,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:10:15,990 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3187 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3187))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))))))) (or (forall ((v_ArrVal_3187 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3187))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4))) is different from false [2023-01-27 20:10:16,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:16,000 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 70 treesize of output 66 [2023-01-27 20:10:16,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:16,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-27 20:10:16,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:16,049 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 116 treesize of output 144 [2023-01-27 20:10:16,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:16,067 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 68 treesize of output 82 [2023-01-27 20:10:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:16,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946774636] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:10:16,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:10:16,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-01-27 20:10:16,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608476143] [2023-01-27 20:10:16,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:10:16,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 20:10:16,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:10:16,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 20:10:16,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=709, Unknown=1, NotChecked=54, Total=870 [2023-01-27 20:10:16,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-01-27 20:10:16,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 613 transitions, 19115 flow. Second operand has 30 states, 30 states have (on average 160.9) internal successors, (4827), 30 states have internal predecessors, (4827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:16,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:10:16,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-01-27 20:10:16,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:10:19,551 INFO L130 PetriNetUnfolder]: 2517/4489 cut-off events. [2023-01-27 20:10:19,551 INFO L131 PetriNetUnfolder]: For 235655/235655 co-relation queries the response was YES. [2023-01-27 20:10:19,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63643 conditions, 4489 events. 2517/4489 cut-off events. For 235655/235655 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 30991 event pairs, 246 based on Foata normal form. 8/4497 useless extension candidates. Maximal degree in co-relation 63435. Up to 1342 conditions per place. [2023-01-27 20:10:19,625 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 309 selfloop transitions, 361 changer transitions 9/679 dead transitions. [2023-01-27 20:10:19,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 679 transitions, 21448 flow [2023-01-27 20:10:19,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 20:10:19,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 20:10:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3930 transitions. [2023-01-27 20:10:19,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33486707566462165 [2023-01-27 20:10:19,627 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3930 transitions. [2023-01-27 20:10:19,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3930 transitions. [2023-01-27 20:10:19,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:10:19,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3930 transitions. [2023-01-27 20:10:19,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 163.75) internal successors, (3930), 24 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:19,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 489.0) internal successors, (12225), 25 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:19,636 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 489.0) internal successors, (12225), 25 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:19,636 INFO L175 Difference]: Start difference. First operand has 412 places, 613 transitions, 19115 flow. Second operand 24 states and 3930 transitions. [2023-01-27 20:10:19,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 679 transitions, 21448 flow [2023-01-27 20:10:20,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 679 transitions, 21133 flow, removed 4 selfloop flow, removed 14 redundant places. [2023-01-27 20:10:20,777 INFO L231 Difference]: Finished difference. Result has 416 places, 610 transitions, 19503 flow [2023-01-27 20:10:20,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=18755, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=19503, PETRI_PLACES=416, PETRI_TRANSITIONS=610} [2023-01-27 20:10:20,777 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 393 predicate places. [2023-01-27 20:10:20,777 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 610 transitions, 19503 flow [2023-01-27 20:10:20,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 160.9) internal successors, (4827), 30 states have internal predecessors, (4827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:20,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:10:20,778 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:10:20,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-01-27 20:10:20,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-01-27 20:10:20,988 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:10:20,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:10:20,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1643894647, now seen corresponding path program 41 times [2023-01-27 20:10:20,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:10:20,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556767059] [2023-01-27 20:10:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:10:20,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:10:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:10:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:21,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:10:21,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556767059] [2023-01-27 20:10:21,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556767059] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:10:21,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417925517] [2023-01-27 20:10:21,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:10:21,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:10:21,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:10:21,663 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:10:21,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-27 20:10:21,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:10:21,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:10:21,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-27 20:10:21,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:10:22,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:10:22,046 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 14 treesize of output 16 [2023-01-27 20:10:22,176 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:10:22,176 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 60 treesize of output 32 [2023-01-27 20:10:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:22,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:10:22,384 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3258 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3258))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (not (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset))) (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_3258 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3258))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))))) is different from false [2023-01-27 20:10:22,394 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:22,394 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 70 treesize of output 66 [2023-01-27 20:10:22,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:22,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-27 20:10:22,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:22,437 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 116 treesize of output 144 [2023-01-27 20:10:22,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:22,455 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 68 treesize of output 82 [2023-01-27 20:10:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:22,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417925517] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:10:22,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:10:22,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-01-27 20:10:22,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737233989] [2023-01-27 20:10:22,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:10:22,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 20:10:22,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:10:22,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 20:10:22,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=607, Unknown=1, NotChecked=50, Total=756 [2023-01-27 20:10:22,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-01-27 20:10:22,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 610 transitions, 19503 flow. Second operand has 28 states, 28 states have (on average 160.85714285714286) internal successors, (4504), 28 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:22,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:10:22,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-01-27 20:10:22,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:10:25,797 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 20:10:27,385 INFO L130 PetriNetUnfolder]: 2497/4451 cut-off events. [2023-01-27 20:10:27,385 INFO L131 PetriNetUnfolder]: For 234387/234387 co-relation queries the response was YES. [2023-01-27 20:10:27,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64766 conditions, 4451 events. 2497/4451 cut-off events. For 234387/234387 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 30663 event pairs, 550 based on Foata normal form. 8/4459 useless extension candidates. Maximal degree in co-relation 64559. Up to 3107 conditions per place. [2023-01-27 20:10:27,461 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 261 selfloop transitions, 371 changer transitions 13/645 dead transitions. [2023-01-27 20:10:27,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 645 transitions, 21106 flow [2023-01-27 20:10:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:10:27,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:10:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2137 transitions. [2023-01-27 20:10:27,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3361648576372503 [2023-01-27 20:10:27,606 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2137 transitions. [2023-01-27 20:10:27,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2137 transitions. [2023-01-27 20:10:27,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:10:27,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2137 transitions. [2023-01-27 20:10:27,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 164.3846153846154) internal successors, (2137), 13 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:27,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:27,611 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:27,611 INFO L175 Difference]: Start difference. First operand has 416 places, 610 transitions, 19503 flow. Second operand 13 states and 2137 transitions. [2023-01-27 20:10:27,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 645 transitions, 21106 flow [2023-01-27 20:10:28,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 645 transitions, 20899 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-01-27 20:10:28,584 INFO L231 Difference]: Finished difference. Result has 417 places, 609 transitions, 20015 flow [2023-01-27 20:10:28,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=19296, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=20015, PETRI_PLACES=417, PETRI_TRANSITIONS=609} [2023-01-27 20:10:28,588 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 394 predicate places. [2023-01-27 20:10:28,588 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 609 transitions, 20015 flow [2023-01-27 20:10:28,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.85714285714286) internal successors, (4504), 28 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:28,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:10:28,588 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:10:28,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-27 20:10:28,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-27 20:10:28,794 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:10:28,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:10:28,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1816861323, now seen corresponding path program 42 times [2023-01-27 20:10:28,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:10:28,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830999207] [2023-01-27 20:10:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:10:28,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:10:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:10:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:29,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:10:29,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830999207] [2023-01-27 20:10:29,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830999207] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:10:29,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010850105] [2023-01-27 20:10:29,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:10:29,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:10:29,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:10:29,651 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:10:29,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-27 20:10:29,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 20:10:29,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:10:29,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 60 conjunts are in the unsatisfiable core [2023-01-27 20:10:29,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:10:30,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:10:30,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:10:30,208 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:10:30,208 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 39 treesize of output 40 [2023-01-27 20:10:30,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:30,336 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 65 treesize of output 41 [2023-01-27 20:10:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:30,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:10:30,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:30,783 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 94 treesize of output 130 [2023-01-27 20:10:30,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:30,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-27 20:10:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:31,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010850105] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:10:31,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:10:31,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 32 [2023-01-27 20:10:31,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209236131] [2023-01-27 20:10:31,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:10:31,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 20:10:31,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:10:31,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 20:10:31,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=926, Unknown=3, NotChecked=0, Total=1056 [2023-01-27 20:10:31,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 489 [2023-01-27 20:10:31,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 609 transitions, 20015 flow. Second operand has 33 states, 33 states have (on average 156.63636363636363) internal successors, (5169), 33 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:31,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:10:31,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 489 [2023-01-27 20:10:31,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:10:34,341 INFO L130 PetriNetUnfolder]: 2645/4711 cut-off events. [2023-01-27 20:10:34,342 INFO L131 PetriNetUnfolder]: For 248647/248647 co-relation queries the response was YES. [2023-01-27 20:10:34,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70640 conditions, 4711 events. 2645/4711 cut-off events. For 248647/248647 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 32593 event pairs, 174 based on Foata normal form. 48/4759 useless extension candidates. Maximal degree in co-relation 70431. Up to 1478 conditions per place. [2023-01-27 20:10:34,423 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 331 selfloop transitions, 392 changer transitions 12/735 dead transitions. [2023-01-27 20:10:34,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 735 transitions, 24251 flow [2023-01-27 20:10:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 20:10:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 20:10:34,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3066 transitions. [2023-01-27 20:10:34,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32999677106877623 [2023-01-27 20:10:34,425 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3066 transitions. [2023-01-27 20:10:34,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3066 transitions. [2023-01-27 20:10:34,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:10:34,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3066 transitions. [2023-01-27 20:10:34,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 161.3684210526316) internal successors, (3066), 19 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:34,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:34,446 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:34,446 INFO L175 Difference]: Start difference. First operand has 417 places, 609 transitions, 20015 flow. Second operand 19 states and 3066 transitions. [2023-01-27 20:10:34,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 735 transitions, 24251 flow [2023-01-27 20:10:35,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 735 transitions, 23673 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-01-27 20:10:35,768 INFO L231 Difference]: Finished difference. Result has 429 places, 637 transitions, 21604 flow [2023-01-27 20:10:35,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=19465, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=21604, PETRI_PLACES=429, PETRI_TRANSITIONS=637} [2023-01-27 20:10:35,783 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 406 predicate places. [2023-01-27 20:10:35,783 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 637 transitions, 21604 flow [2023-01-27 20:10:35,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 156.63636363636363) internal successors, (5169), 33 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:35,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:10:35,783 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:10:35,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-01-27 20:10:35,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:10:35,993 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:10:35,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:10:35,993 INFO L85 PathProgramCache]: Analyzing trace with hash -747080383, now seen corresponding path program 43 times [2023-01-27 20:10:35,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:10:35,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302879366] [2023-01-27 20:10:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:10:35,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:10:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:10:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:36,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:10:36,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302879366] [2023-01-27 20:10:36,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302879366] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:10:36,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342307714] [2023-01-27 20:10:36,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:10:36,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:10:36,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:10:36,837 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:10:36,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-27 20:10:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:10:37,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-27 20:10:37,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:10:37,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:10:37,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:10:37,390 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:10:37,391 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 20 treesize of output 25 [2023-01-27 20:10:37,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:37,522 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 46 treesize of output 30 [2023-01-27 20:10:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:37,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:10:37,852 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:37,853 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 94 treesize of output 130 [2023-01-27 20:10:37,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:37,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-27 20:10:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:38,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342307714] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:10:38,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:10:38,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-27 20:10:38,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698849249] [2023-01-27 20:10:38,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:10:38,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:10:38,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:10:38,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:10:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=870, Unknown=2, NotChecked=0, Total=992 [2023-01-27 20:10:38,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 489 [2023-01-27 20:10:38,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 637 transitions, 21604 flow. Second operand has 32 states, 32 states have (on average 156.78125) internal successors, (5017), 32 states have internal predecessors, (5017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:38,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:10:38,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 489 [2023-01-27 20:10:38,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:10:41,273 INFO L130 PetriNetUnfolder]: 2605/4621 cut-off events. [2023-01-27 20:10:41,274 INFO L131 PetriNetUnfolder]: For 282235/282235 co-relation queries the response was YES. [2023-01-27 20:10:41,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71577 conditions, 4621 events. 2605/4621 cut-off events. For 282235/282235 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 31918 event pairs, 160 based on Foata normal form. 8/4629 useless extension candidates. Maximal degree in co-relation 71365. Up to 1434 conditions per place. [2023-01-27 20:10:41,347 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 296 selfloop transitions, 405 changer transitions 13/714 dead transitions. [2023-01-27 20:10:41,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 714 transitions, 24336 flow [2023-01-27 20:10:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 20:10:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 20:10:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3206 transitions. [2023-01-27 20:10:41,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3278118609406953 [2023-01-27 20:10:41,351 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3206 transitions. [2023-01-27 20:10:41,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3206 transitions. [2023-01-27 20:10:41,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:10:41,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3206 transitions. [2023-01-27 20:10:41,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 160.3) internal successors, (3206), 20 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:41,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:41,358 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:41,358 INFO L175 Difference]: Start difference. First operand has 429 places, 637 transitions, 21604 flow. Second operand 20 states and 3206 transitions. [2023-01-27 20:10:41,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 714 transitions, 24336 flow [2023-01-27 20:10:42,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 714 transitions, 23265 flow, removed 151 selfloop flow, removed 13 redundant places. [2023-01-27 20:10:42,570 INFO L231 Difference]: Finished difference. Result has 435 places, 638 transitions, 21428 flow [2023-01-27 20:10:42,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=20439, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=21428, PETRI_PLACES=435, PETRI_TRANSITIONS=638} [2023-01-27 20:10:42,579 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 412 predicate places. [2023-01-27 20:10:42,579 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 638 transitions, 21428 flow [2023-01-27 20:10:42,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.78125) internal successors, (5017), 32 states have internal predecessors, (5017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:42,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:10:42,580 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:10:42,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-01-27 20:10:42,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:10:42,785 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:10:42,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:10:42,786 INFO L85 PathProgramCache]: Analyzing trace with hash -743395793, now seen corresponding path program 44 times [2023-01-27 20:10:42,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:10:42,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808446830] [2023-01-27 20:10:42,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:10:42,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:10:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:10:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:43,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:10:43,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808446830] [2023-01-27 20:10:43,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808446830] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:10:43,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950706375] [2023-01-27 20:10:43,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:10:43,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:10:43,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:10:43,421 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:10:43,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-27 20:10:43,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:10:43,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:10:43,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 53 conjunts are in the unsatisfiable core [2023-01-27 20:10:43,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:10:43,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:10:43,810 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 14 treesize of output 16 [2023-01-27 20:10:43,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:43,905 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 46 treesize of output 30 [2023-01-27 20:10:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:43,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:10:44,163 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_3471 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3471))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_3471 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3471))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))) (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) is different from false [2023-01-27 20:10:44,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:44,179 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 70 treesize of output 66 [2023-01-27 20:10:44,185 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:44,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-27 20:10:44,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:44,223 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 116 treesize of output 144 [2023-01-27 20:10:44,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:44,241 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 68 treesize of output 82 [2023-01-27 20:10:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:44,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950706375] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:10:44,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:10:44,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-01-27 20:10:44,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765766770] [2023-01-27 20:10:44,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:10:44,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 20:10:44,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:10:44,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 20:10:44,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=657, Unknown=1, NotChecked=52, Total=812 [2023-01-27 20:10:44,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-01-27 20:10:44,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 638 transitions, 21428 flow. Second operand has 29 states, 29 states have (on average 160.86206896551724) internal successors, (4665), 29 states have internal predecessors, (4665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:44,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:10:44,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-01-27 20:10:44,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:10:47,608 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 20:10:50,267 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 20:10:51,929 INFO L130 PetriNetUnfolder]: 2613/4619 cut-off events. [2023-01-27 20:10:51,929 INFO L131 PetriNetUnfolder]: For 262010/262010 co-relation queries the response was YES. [2023-01-27 20:10:51,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71166 conditions, 4619 events. 2613/4619 cut-off events. For 262010/262010 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 31714 event pairs, 438 based on Foata normal form. 8/4627 useless extension candidates. Maximal degree in co-relation 70959. Up to 2579 conditions per place. [2023-01-27 20:10:52,008 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 327 selfloop transitions, 379 changer transitions 8/714 dead transitions. [2023-01-27 20:10:52,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 714 transitions, 24479 flow [2023-01-27 20:10:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 20:10:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 20:10:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2949 transitions. [2023-01-27 20:10:52,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33503749147920925 [2023-01-27 20:10:52,010 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2949 transitions. [2023-01-27 20:10:52,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2949 transitions. [2023-01-27 20:10:52,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:10:52,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2949 transitions. [2023-01-27 20:10:52,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 163.83333333333334) internal successors, (2949), 18 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:52,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:52,016 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:52,016 INFO L175 Difference]: Start difference. First operand has 435 places, 638 transitions, 21428 flow. Second operand 18 states and 2949 transitions. [2023-01-27 20:10:52,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 714 transitions, 24479 flow [2023-01-27 20:10:53,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 714 transitions, 23983 flow, removed 63 selfloop flow, removed 9 redundant places. [2023-01-27 20:10:53,129 INFO L231 Difference]: Finished difference. Result has 442 places, 656 transitions, 22503 flow [2023-01-27 20:10:53,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=20940, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=22503, PETRI_PLACES=442, PETRI_TRANSITIONS=656} [2023-01-27 20:10:53,137 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 419 predicate places. [2023-01-27 20:10:53,138 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 656 transitions, 22503 flow [2023-01-27 20:10:53,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 160.86206896551724) internal successors, (4665), 29 states have internal predecessors, (4665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:53,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:10:53,138 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:10:53,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-01-27 20:10:53,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:10:53,343 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:10:53,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:10:53,344 INFO L85 PathProgramCache]: Analyzing trace with hash 894158783, now seen corresponding path program 45 times [2023-01-27 20:10:53,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:10:53,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248135190] [2023-01-27 20:10:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:10:53,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:10:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:10:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:53,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:10:53,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248135190] [2023-01-27 20:10:53,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248135190] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:10:53,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576238547] [2023-01-27 20:10:53,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:10:53,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:10:53,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:10:53,820 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:10:53,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-27 20:10:54,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 20:10:54,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:10:54,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 66 conjunts are in the unsatisfiable core [2023-01-27 20:10:54,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:10:54,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:10:54,227 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 14 treesize of output 16 [2023-01-27 20:10:54,395 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:10:54,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:10:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:54,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:10:54,888 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3542 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3542))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (not (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse0 c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_3542 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3542))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))))) is different from false [2023-01-27 20:10:54,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:54,917 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 116 treesize of output 144 [2023-01-27 20:10:54,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:10:54,933 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 68 treesize of output 82 [2023-01-27 20:10:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:55,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576238547] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:10:55,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:10:55,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 31 [2023-01-27 20:10:55,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365219456] [2023-01-27 20:10:55,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:10:55,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:10:55,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:10:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:10:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=817, Unknown=1, NotChecked=58, Total=992 [2023-01-27 20:10:55,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-01-27 20:10:55,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 656 transitions, 22503 flow. Second operand has 32 states, 32 states have (on average 157.78125) internal successors, (5049), 32 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:55,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:10:55,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-01-27 20:10:55,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:10:57,872 INFO L130 PetriNetUnfolder]: 2679/4707 cut-off events. [2023-01-27 20:10:57,872 INFO L131 PetriNetUnfolder]: For 263801/263801 co-relation queries the response was YES. [2023-01-27 20:10:57,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73490 conditions, 4707 events. 2679/4707 cut-off events. For 263801/263801 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 32113 event pairs, 232 based on Foata normal form. 20/4727 useless extension candidates. Maximal degree in co-relation 73283. Up to 3044 conditions per place. [2023-01-27 20:10:57,953 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 304 selfloop transitions, 417 changer transitions 2/723 dead transitions. [2023-01-27 20:10:57,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 723 transitions, 25406 flow [2023-01-27 20:10:57,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 20:10:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 20:10:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2739 transitions. [2023-01-27 20:10:57,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32948394081559 [2023-01-27 20:10:57,955 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2739 transitions. [2023-01-27 20:10:57,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2739 transitions. [2023-01-27 20:10:57,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:10:57,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2739 transitions. [2023-01-27 20:10:57,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 161.11764705882354) internal successors, (2739), 17 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:57,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:57,961 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:57,961 INFO L175 Difference]: Start difference. First operand has 442 places, 656 transitions, 22503 flow. Second operand 17 states and 2739 transitions. [2023-01-27 20:10:57,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 723 transitions, 25406 flow [2023-01-27 20:10:59,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 723 transitions, 24665 flow, removed 13 selfloop flow, removed 17 redundant places. [2023-01-27 20:10:59,074 INFO L231 Difference]: Finished difference. Result has 442 places, 675 transitions, 24019 flow [2023-01-27 20:10:59,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=21761, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=24019, PETRI_PLACES=442, PETRI_TRANSITIONS=675} [2023-01-27 20:10:59,076 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 419 predicate places. [2023-01-27 20:10:59,076 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 675 transitions, 24019 flow [2023-01-27 20:10:59,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 157.78125) internal successors, (5049), 32 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:59,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:10:59,076 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:10:59,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-27 20:10:59,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-01-27 20:10:59,283 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:10:59,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:10:59,283 INFO L85 PathProgramCache]: Analyzing trace with hash 269100067, now seen corresponding path program 46 times [2023-01-27 20:10:59,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:10:59,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246533317] [2023-01-27 20:10:59,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:10:59,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:10:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:10:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:10:59,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:10:59,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246533317] [2023-01-27 20:10:59,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246533317] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:10:59,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653383543] [2023-01-27 20:10:59,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:10:59,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:10:59,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:10:59,725 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:10:59,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-27 20:10:59,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:10:59,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:10:59,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:10:59,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:11:00,089 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 39 treesize of output 23 [2023-01-27 20:11:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:00,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:11:00,230 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 20:11:00,230 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 82 treesize of output 99 [2023-01-27 20:11:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:00,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653383543] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:11:00,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:11:00,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-27 20:11:00,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956649726] [2023-01-27 20:11:00,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:11:00,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:11:00,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:11:00,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:11:00,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:11:00,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:11:00,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 675 transitions, 24019 flow. Second operand has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:00,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:11:00,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:11:00,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:11:02,591 INFO L130 PetriNetUnfolder]: 2793/4899 cut-off events. [2023-01-27 20:11:02,591 INFO L131 PetriNetUnfolder]: For 293899/293899 co-relation queries the response was YES. [2023-01-27 20:11:02,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78253 conditions, 4899 events. 2793/4899 cut-off events. For 293899/293899 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 33659 event pairs, 394 based on Foata normal form. 8/4907 useless extension candidates. Maximal degree in co-relation 78045. Up to 2393 conditions per place. [2023-01-27 20:11:02,673 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 326 selfloop transitions, 428 changer transitions 2/756 dead transitions. [2023-01-27 20:11:02,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 756 transitions, 27512 flow [2023-01-27 20:11:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:11:02,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:11:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2350 transitions. [2023-01-27 20:11:02,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34326614081215306 [2023-01-27 20:11:02,675 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2350 transitions. [2023-01-27 20:11:02,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2350 transitions. [2023-01-27 20:11:02,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:11:02,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2350 transitions. [2023-01-27 20:11:02,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 167.85714285714286) internal successors, (2350), 14 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:02,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:02,680 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:02,680 INFO L175 Difference]: Start difference. First operand has 442 places, 675 transitions, 24019 flow. Second operand 14 states and 2350 transitions. [2023-01-27 20:11:02,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 756 transitions, 27512 flow [2023-01-27 20:11:04,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 756 transitions, 26932 flow, removed 89 selfloop flow, removed 10 redundant places. [2023-01-27 20:11:04,203 INFO L231 Difference]: Finished difference. Result has 446 places, 695 transitions, 25358 flow [2023-01-27 20:11:04,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=23495, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=25358, PETRI_PLACES=446, PETRI_TRANSITIONS=695} [2023-01-27 20:11:04,204 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 423 predicate places. [2023-01-27 20:11:04,204 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 695 transitions, 25358 flow [2023-01-27 20:11:04,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:04,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:11:04,205 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:11:04,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-27 20:11:04,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-01-27 20:11:04,412 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:11:04,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:11:04,412 INFO L85 PathProgramCache]: Analyzing trace with hash 361744833, now seen corresponding path program 47 times [2023-01-27 20:11:04,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:11:04,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596486656] [2023-01-27 20:11:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:11:04,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:11:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:11:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:04,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:11:04,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596486656] [2023-01-27 20:11:04,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596486656] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:11:04,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542304569] [2023-01-27 20:11:04,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:11:04,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:11:04,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:11:04,885 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:11:04,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-27 20:11:05,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:11:05,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:11:05,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:11:05,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:11:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:05,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:11:05,493 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:11:05,493 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 70 treesize of output 70 [2023-01-27 20:11:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:05,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542304569] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:11:05,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:11:05,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-27 20:11:05,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973132344] [2023-01-27 20:11:05,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:11:05,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:11:05,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:11:05,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:11:05,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:11:05,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:11:05,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 695 transitions, 25358 flow. Second operand has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:05,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:11:05,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:11:05,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:11:07,886 INFO L130 PetriNetUnfolder]: 2883/5051 cut-off events. [2023-01-27 20:11:07,886 INFO L131 PetriNetUnfolder]: For 308343/308343 co-relation queries the response was YES. [2023-01-27 20:11:07,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82454 conditions, 5051 events. 2883/5051 cut-off events. For 308343/308343 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 34818 event pairs, 42 based on Foata normal form. 8/5059 useless extension candidates. Maximal degree in co-relation 82247. Up to 1558 conditions per place. [2023-01-27 20:11:07,981 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 225 selfloop transitions, 575 changer transitions 3/803 dead transitions. [2023-01-27 20:11:07,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 803 transitions, 29414 flow [2023-01-27 20:11:07,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 20:11:07,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 20:11:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3027 transitions. [2023-01-27 20:11:07,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34389911383776417 [2023-01-27 20:11:07,984 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3027 transitions. [2023-01-27 20:11:07,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3027 transitions. [2023-01-27 20:11:07,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:11:07,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3027 transitions. [2023-01-27 20:11:07,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 168.16666666666666) internal successors, (3027), 18 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:07,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:07,990 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:07,991 INFO L175 Difference]: Start difference. First operand has 446 places, 695 transitions, 25358 flow. Second operand 18 states and 3027 transitions. [2023-01-27 20:11:07,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 803 transitions, 29414 flow [2023-01-27 20:11:09,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 803 transitions, 29337 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-01-27 20:11:09,561 INFO L231 Difference]: Finished difference. Result has 460 places, 726 transitions, 27828 flow [2023-01-27 20:11:09,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=25281, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=545, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=27828, PETRI_PLACES=460, PETRI_TRANSITIONS=726} [2023-01-27 20:11:09,562 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 437 predicate places. [2023-01-27 20:11:09,563 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 726 transitions, 27828 flow [2023-01-27 20:11:09,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:09,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:11:09,563 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:11:09,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-01-27 20:11:09,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-01-27 20:11:09,769 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:11:09,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:11:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash -682645809, now seen corresponding path program 48 times [2023-01-27 20:11:09,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:11:09,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055836026] [2023-01-27 20:11:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:11:09,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:11:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:11:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:10,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:11:10,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055836026] [2023-01-27 20:11:10,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055836026] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:11:10,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71762603] [2023-01-27 20:11:10,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:11:10,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:11:10,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:11:10,361 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:11:10,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-27 20:11:10,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 20:11:10,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:11:10,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:11:10,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:11:10,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:11:10,878 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 58 treesize of output 51 [2023-01-27 20:11:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:10,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:11:11,121 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:11:11,121 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 70 treesize of output 70 [2023-01-27 20:11:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:11,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71762603] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:11:11,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:11:11,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-27 20:11:11,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852777464] [2023-01-27 20:11:11,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:11:11,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 20:11:11,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:11:11,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 20:11:11,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:11:11,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:11:11,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 726 transitions, 27828 flow. Second operand has 22 states, 22 states have (on average 165.13636363636363) internal successors, (3633), 22 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:11,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:11:11,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:11:11,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:11:13,808 INFO L130 PetriNetUnfolder]: 2923/5135 cut-off events. [2023-01-27 20:11:13,808 INFO L131 PetriNetUnfolder]: For 330714/330714 co-relation queries the response was YES. [2023-01-27 20:11:13,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86451 conditions, 5135 events. 2923/5135 cut-off events. For 330714/330714 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 35604 event pairs, 44 based on Foata normal form. 16/5151 useless extension candidates. Maximal degree in co-relation 86241. Up to 1689 conditions per place. [2023-01-27 20:11:13,901 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 270 selfloop transitions, 531 changer transitions 9/810 dead transitions. [2023-01-27 20:11:13,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 810 transitions, 30882 flow [2023-01-27 20:11:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 20:11:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 20:11:13,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3038 transitions. [2023-01-27 20:11:13,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3451488298114065 [2023-01-27 20:11:13,903 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3038 transitions. [2023-01-27 20:11:13,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3038 transitions. [2023-01-27 20:11:13,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:11:13,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3038 transitions. [2023-01-27 20:11:13,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 168.77777777777777) internal successors, (3038), 18 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:13,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:13,909 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:13,909 INFO L175 Difference]: Start difference. First operand has 460 places, 726 transitions, 27828 flow. Second operand 18 states and 3038 transitions. [2023-01-27 20:11:13,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 810 transitions, 30882 flow [2023-01-27 20:11:15,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 810 transitions, 30247 flow, removed 68 selfloop flow, removed 10 redundant places. [2023-01-27 20:11:15,594 INFO L231 Difference]: Finished difference. Result has 472 places, 731 transitions, 29027 flow [2023-01-27 20:11:15,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=27206, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=526, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=29027, PETRI_PLACES=472, PETRI_TRANSITIONS=731} [2023-01-27 20:11:15,595 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 449 predicate places. [2023-01-27 20:11:15,595 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 731 transitions, 29027 flow [2023-01-27 20:11:15,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 165.13636363636363) internal successors, (3633), 22 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:15,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:11:15,595 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:11:15,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-01-27 20:11:15,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-01-27 20:11:15,802 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:11:15,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:11:15,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2064674063, now seen corresponding path program 49 times [2023-01-27 20:11:15,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:11:15,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291794764] [2023-01-27 20:11:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:11:15,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:11:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:11:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:16,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:11:16,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291794764] [2023-01-27 20:11:16,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291794764] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:11:16,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202076077] [2023-01-27 20:11:16,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:11:16,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:11:16,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:11:16,285 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:11:16,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-01-27 20:11:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:11:16,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:11:16,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:11:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:16,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:11:16,816 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:11:16,816 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 70 treesize of output 70 [2023-01-27 20:11:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:16,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202076077] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:11:16,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:11:16,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-01-27 20:11:16,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321152854] [2023-01-27 20:11:16,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:11:16,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 20:11:16,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:11:16,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 20:11:16,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-01-27 20:11:16,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:11:16,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 731 transitions, 29027 flow. Second operand has 18 states, 18 states have (on average 165.22222222222223) internal successors, (2974), 18 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:16,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:11:16,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:11:16,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:11:19,556 INFO L130 PetriNetUnfolder]: 3061/5357 cut-off events. [2023-01-27 20:11:19,556 INFO L131 PetriNetUnfolder]: For 367872/367872 co-relation queries the response was YES. [2023-01-27 20:11:19,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93137 conditions, 5357 events. 3061/5357 cut-off events. For 367872/367872 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 37283 event pairs, 54 based on Foata normal form. 8/5365 useless extension candidates. Maximal degree in co-relation 92921. Up to 1732 conditions per place. [2023-01-27 20:11:19,661 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 221 selfloop transitions, 591 changer transitions 3/815 dead transitions. [2023-01-27 20:11:19,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 815 transitions, 32722 flow [2023-01-27 20:11:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:11:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:11:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2192 transitions. [2023-01-27 20:11:19,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34481673745477426 [2023-01-27 20:11:19,663 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2192 transitions. [2023-01-27 20:11:19,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2192 transitions. [2023-01-27 20:11:19,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:11:19,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2192 transitions. [2023-01-27 20:11:19,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:19,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:19,668 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:19,668 INFO L175 Difference]: Start difference. First operand has 472 places, 731 transitions, 29027 flow. Second operand 13 states and 2192 transitions. [2023-01-27 20:11:19,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 815 transitions, 32722 flow [2023-01-27 20:11:21,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 815 transitions, 32464 flow, removed 43 selfloop flow, removed 9 redundant places. [2023-01-27 20:11:21,621 INFO L231 Difference]: Finished difference. Result has 476 places, 751 transitions, 31322 flow [2023-01-27 20:11:21,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=28796, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=31322, PETRI_PLACES=476, PETRI_TRANSITIONS=751} [2023-01-27 20:11:21,622 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 453 predicate places. [2023-01-27 20:11:21,622 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 751 transitions, 31322 flow [2023-01-27 20:11:21,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 165.22222222222223) internal successors, (2974), 18 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:21,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:11:21,622 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:11:21,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-01-27 20:11:21,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-01-27 20:11:21,829 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:11:21,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:11:21,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1641094237, now seen corresponding path program 50 times [2023-01-27 20:11:21,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:11:21,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296872699] [2023-01-27 20:11:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:11:21,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:11:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:11:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:22,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:11:22,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296872699] [2023-01-27 20:11:22,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296872699] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:11:22,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169901141] [2023-01-27 20:11:22,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:11:22,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:11:22,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:11:22,433 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:11:22,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-01-27 20:11:22,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:11:22,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:11:22,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:11:22,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:11:22,942 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 39 treesize of output 23 [2023-01-27 20:11:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:22,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:11:23,116 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:11:23,116 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 70 treesize of output 70 [2023-01-27 20:11:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:23,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169901141] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:11:23,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:11:23,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-01-27 20:11:23,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16326103] [2023-01-27 20:11:23,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:11:23,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 20:11:23,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:11:23,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 20:11:23,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:11:23,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:11:23,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 751 transitions, 31322 flow. Second operand has 21 states, 21 states have (on average 165.14285714285714) internal successors, (3468), 21 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:23,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:11:23,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:11:23,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:11:26,049 INFO L130 PetriNetUnfolder]: 3205/5597 cut-off events. [2023-01-27 20:11:26,049 INFO L131 PetriNetUnfolder]: For 413049/413049 co-relation queries the response was YES. [2023-01-27 20:11:26,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100644 conditions, 5597 events. 3205/5597 cut-off events. For 413049/413049 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 39133 event pairs, 54 based on Foata normal form. 8/5605 useless extension candidates. Maximal degree in co-relation 100425. Up to 1892 conditions per place. [2023-01-27 20:11:26,160 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 220 selfloop transitions, 609 changer transitions 3/832 dead transitions. [2023-01-27 20:11:26,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 832 transitions, 34791 flow [2023-01-27 20:11:26,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 20:11:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 20:11:26,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2693 transitions. [2023-01-27 20:11:26,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34419734151329245 [2023-01-27 20:11:26,162 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2693 transitions. [2023-01-27 20:11:26,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2693 transitions. [2023-01-27 20:11:26,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:11:26,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2693 transitions. [2023-01-27 20:11:26,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 168.3125) internal successors, (2693), 16 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:26,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:26,167 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:26,167 INFO L175 Difference]: Start difference. First operand has 476 places, 751 transitions, 31322 flow. Second operand 16 states and 2693 transitions. [2023-01-27 20:11:26,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 832 transitions, 34791 flow [2023-01-27 20:11:28,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 832 transitions, 34181 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-01-27 20:11:28,629 INFO L231 Difference]: Finished difference. Result has 487 places, 765 transitions, 33089 flow [2023-01-27 20:11:28,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=30712, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=595, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=33089, PETRI_PLACES=487, PETRI_TRANSITIONS=765} [2023-01-27 20:11:28,630 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 464 predicate places. [2023-01-27 20:11:28,630 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 765 transitions, 33089 flow [2023-01-27 20:11:28,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.14285714285714) internal successors, (3468), 21 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:28,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:11:28,631 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:11:28,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-01-27 20:11:28,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-01-27 20:11:28,838 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:11:28,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:11:28,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1780132379, now seen corresponding path program 51 times [2023-01-27 20:11:28,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:11:28,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989699657] [2023-01-27 20:11:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:11:28,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:11:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:11:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:29,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:11:29,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989699657] [2023-01-27 20:11:29,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989699657] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:11:29,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615326555] [2023-01-27 20:11:29,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:11:29,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:11:29,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:11:29,597 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:11:29,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-01-27 20:11:30,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:11:30,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:11:30,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:11:30,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:11:30,203 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:11:30,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-27 20:11:30,212 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:11:30,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:11:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:30,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:11:30,431 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:11:30,432 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 70 treesize of output 70 [2023-01-27 20:11:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:30,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615326555] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:11:30,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:11:30,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-01-27 20:11:30,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131226855] [2023-01-27 20:11:30,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:11:30,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 20:11:30,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:11:30,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 20:11:30,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:11:30,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:11:30,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 765 transitions, 33089 flow. Second operand has 21 states, 21 states have (on average 165.04761904761904) internal successors, (3466), 21 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:30,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:11:30,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:11:30,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:11:33,356 INFO L130 PetriNetUnfolder]: 3361/5845 cut-off events. [2023-01-27 20:11:33,356 INFO L131 PetriNetUnfolder]: For 467669/467669 co-relation queries the response was YES. [2023-01-27 20:11:33,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109029 conditions, 5845 events. 3361/5845 cut-off events. For 467669/467669 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 40936 event pairs, 74 based on Foata normal form. 8/5853 useless extension candidates. Maximal degree in co-relation 108805. Up to 2052 conditions per place. [2023-01-27 20:11:33,476 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 231 selfloop transitions, 619 changer transitions 3/853 dead transitions. [2023-01-27 20:11:33,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 853 transitions, 36976 flow [2023-01-27 20:11:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 20:11:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 20:11:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3194 transitions. [2023-01-27 20:11:33,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34377354429017326 [2023-01-27 20:11:33,478 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3194 transitions. [2023-01-27 20:11:33,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3194 transitions. [2023-01-27 20:11:33,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:11:33,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3194 transitions. [2023-01-27 20:11:33,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 168.10526315789474) internal successors, (3194), 19 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:33,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:33,485 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:33,485 INFO L175 Difference]: Start difference. First operand has 487 places, 765 transitions, 33089 flow. Second operand 19 states and 3194 transitions. [2023-01-27 20:11:33,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 853 transitions, 36976 flow [2023-01-27 20:11:37,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 853 transitions, 36417 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-01-27 20:11:37,159 INFO L231 Difference]: Finished difference. Result has 493 places, 782 transitions, 35027 flow [2023-01-27 20:11:37,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=32523, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=35027, PETRI_PLACES=493, PETRI_TRANSITIONS=782} [2023-01-27 20:11:37,161 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 470 predicate places. [2023-01-27 20:11:37,161 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 782 transitions, 35027 flow [2023-01-27 20:11:37,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.04761904761904) internal successors, (3466), 21 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:37,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:11:37,162 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:11:37,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-01-27 20:11:37,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:11:37,368 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:11:37,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:11:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash 167248611, now seen corresponding path program 52 times [2023-01-27 20:11:37,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:11:37,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92487717] [2023-01-27 20:11:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:11:37,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:11:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:11:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:37,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:11:37,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92487717] [2023-01-27 20:11:37,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92487717] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:11:37,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147247227] [2023-01-27 20:11:37,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:11:37,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:11:37,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:11:37,909 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:11:37,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-01-27 20:11:38,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:11:38,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:11:38,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:11:38,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:11:38,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:11:38,330 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 58 treesize of output 51 [2023-01-27 20:11:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:38,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:11:38,571 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 20:11:38,571 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 82 treesize of output 99 [2023-01-27 20:11:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:38,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147247227] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:11:38,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:11:38,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-01-27 20:11:38,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590161975] [2023-01-27 20:11:38,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:11:38,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 20:11:38,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:11:38,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 20:11:38,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:11:38,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:11:38,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 782 transitions, 35027 flow. Second operand has 21 states, 21 states have (on average 165.1904761904762) internal successors, (3469), 21 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:38,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:11:38,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:11:38,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:11:42,364 INFO L130 PetriNetUnfolder]: 3413/5949 cut-off events. [2023-01-27 20:11:42,365 INFO L131 PetriNetUnfolder]: For 509093/509093 co-relation queries the response was YES. [2023-01-27 20:11:42,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113180 conditions, 5949 events. 3413/5949 cut-off events. For 509093/509093 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 41899 event pairs, 512 based on Foata normal form. 16/5965 useless extension candidates. Maximal degree in co-relation 112957. Up to 3063 conditions per place. [2023-01-27 20:11:42,470 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 377 selfloop transitions, 467 changer transitions 8/852 dead transitions. [2023-01-27 20:11:42,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 852 transitions, 37997 flow [2023-01-27 20:11:42,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 20:11:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 20:11:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3026 transitions. [2023-01-27 20:11:42,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34378550329470575 [2023-01-27 20:11:42,472 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3026 transitions. [2023-01-27 20:11:42,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3026 transitions. [2023-01-27 20:11:42,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:11:42,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3026 transitions. [2023-01-27 20:11:42,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 168.11111111111111) internal successors, (3026), 18 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:42,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:42,480 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:42,480 INFO L175 Difference]: Start difference. First operand has 493 places, 782 transitions, 35027 flow. Second operand 18 states and 3026 transitions. [2023-01-27 20:11:42,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 852 transitions, 37997 flow [2023-01-27 20:11:45,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 852 transitions, 36233 flow, removed 32 selfloop flow, removed 19 redundant places. [2023-01-27 20:11:45,666 INFO L231 Difference]: Finished difference. Result has 494 places, 786 transitions, 35010 flow [2023-01-27 20:11:45,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=33222, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=35010, PETRI_PLACES=494, PETRI_TRANSITIONS=786} [2023-01-27 20:11:45,667 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 471 predicate places. [2023-01-27 20:11:45,668 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 786 transitions, 35010 flow [2023-01-27 20:11:45,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.1904761904762) internal successors, (3469), 21 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:45,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:11:45,668 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:11:45,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-01-27 20:11:45,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:11:45,891 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:11:45,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:11:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1431569059, now seen corresponding path program 53 times [2023-01-27 20:11:45,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:11:45,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430806434] [2023-01-27 20:11:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:11:45,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:11:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:11:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:46,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:11:46,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430806434] [2023-01-27 20:11:46,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430806434] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:11:46,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185368608] [2023-01-27 20:11:46,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:11:46,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:11:46,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:11:46,516 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:11:46,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-01-27 20:11:46,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:11:46,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:11:46,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:11:46,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:11:46,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:11:46,937 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 65 treesize of output 41 [2023-01-27 20:11:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:46,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:11:47,147 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:11:47,148 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 40 treesize of output 56 [2023-01-27 20:11:47,164 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:11:47,165 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 20 treesize of output 4 [2023-01-27 20:11:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:47,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185368608] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:11:47,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:11:47,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:11:47,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512064197] [2023-01-27 20:11:47,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:11:47,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:11:47,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:11:47,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:11:47,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:11:47,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:11:47,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 786 transitions, 35010 flow. Second operand has 20 states, 20 states have (on average 165.05) internal successors, (3301), 20 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:47,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:11:47,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:11:47,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:11:50,514 INFO L130 PetriNetUnfolder]: 3449/6011 cut-off events. [2023-01-27 20:11:50,515 INFO L131 PetriNetUnfolder]: For 555160/555160 co-relation queries the response was YES. [2023-01-27 20:11:50,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114143 conditions, 6011 events. 3449/6011 cut-off events. For 555160/555160 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 42492 event pairs, 466 based on Foata normal form. 8/6019 useless extension candidates. Maximal degree in co-relation 113919. Up to 2843 conditions per place. [2023-01-27 20:11:50,628 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 324 selfloop transitions, 517 changer transitions 3/844 dead transitions. [2023-01-27 20:11:50,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 844 transitions, 37717 flow [2023-01-27 20:11:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:11:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:11:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2192 transitions. [2023-01-27 20:11:50,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34481673745477426 [2023-01-27 20:11:50,629 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2192 transitions. [2023-01-27 20:11:50,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2192 transitions. [2023-01-27 20:11:50,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:11:50,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2192 transitions. [2023-01-27 20:11:50,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:50,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:50,634 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:50,634 INFO L175 Difference]: Start difference. First operand has 494 places, 786 transitions, 35010 flow. Second operand 13 states and 2192 transitions. [2023-01-27 20:11:50,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 844 transitions, 37717 flow [2023-01-27 20:11:53,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 844 transitions, 37407 flow, removed 38 selfloop flow, removed 12 redundant places. [2023-01-27 20:11:53,937 INFO L231 Difference]: Finished difference. Result has 494 places, 790 transitions, 36464 flow [2023-01-27 20:11:53,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=34706, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=513, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=36464, PETRI_PLACES=494, PETRI_TRANSITIONS=790} [2023-01-27 20:11:53,938 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 471 predicate places. [2023-01-27 20:11:53,938 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 790 transitions, 36464 flow [2023-01-27 20:11:53,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.05) internal successors, (3301), 20 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:53,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:11:53,939 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:11:53,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-01-27 20:11:54,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:11:54,145 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:11:54,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:11:54,145 INFO L85 PathProgramCache]: Analyzing trace with hash 432268597, now seen corresponding path program 54 times [2023-01-27 20:11:54,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:11:54,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354071014] [2023-01-27 20:11:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:11:54,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:11:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:11:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:54,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:11:54,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354071014] [2023-01-27 20:11:54,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354071014] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:11:54,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885067435] [2023-01-27 20:11:54,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:11:54,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:11:54,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:11:54,684 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:11:54,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-01-27 20:11:55,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 20:11:55,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:11:55,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:11:55,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:11:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:55,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:11:55,344 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:11:55,344 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 40 treesize of output 56 [2023-01-27 20:11:55,359 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:11:55,360 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 20 treesize of output 4 [2023-01-27 20:11:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:11:55,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885067435] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:11:55,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:11:55,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-01-27 20:11:55,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364334186] [2023-01-27 20:11:55,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:11:55,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 20:11:55,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:11:55,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 20:11:55,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-01-27 20:11:55,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:11:55,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 790 transitions, 36464 flow. Second operand has 18 states, 18 states have (on average 165.16666666666666) internal successors, (2973), 18 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:55,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:11:55,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:11:55,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:11:58,600 INFO L130 PetriNetUnfolder]: 3485/6071 cut-off events. [2023-01-27 20:11:58,601 INFO L131 PetriNetUnfolder]: For 605925/605925 co-relation queries the response was YES. [2023-01-27 20:11:58,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118171 conditions, 6071 events. 3485/6071 cut-off events. For 605925/605925 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 42927 event pairs, 502 based on Foata normal form. 8/6079 useless extension candidates. Maximal degree in co-relation 117945. Up to 2987 conditions per place. [2023-01-27 20:11:58,715 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 322 selfloop transitions, 512 changer transitions 2/836 dead transitions. [2023-01-27 20:11:58,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 836 transitions, 39025 flow [2023-01-27 20:11:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:11:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:11:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1849 transitions. [2023-01-27 20:11:58,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34374419036995724 [2023-01-27 20:11:58,716 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1849 transitions. [2023-01-27 20:11:58,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1849 transitions. [2023-01-27 20:11:58,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:11:58,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1849 transitions. [2023-01-27 20:11:58,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.0909090909091) internal successors, (1849), 11 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:58,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:58,720 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:58,720 INFO L175 Difference]: Start difference. First operand has 494 places, 790 transitions, 36464 flow. Second operand 11 states and 1849 transitions. [2023-01-27 20:11:58,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 836 transitions, 39025 flow [2023-01-27 20:12:01,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 836 transitions, 38898 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-01-27 20:12:01,758 INFO L231 Difference]: Finished difference. Result has 501 places, 793 transitions, 38026 flow [2023-01-27 20:12:01,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=36337, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=509, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=38026, PETRI_PLACES=501, PETRI_TRANSITIONS=793} [2023-01-27 20:12:01,759 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 478 predicate places. [2023-01-27 20:12:01,759 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 793 transitions, 38026 flow [2023-01-27 20:12:01,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 165.16666666666666) internal successors, (2973), 18 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:01,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:12:01,760 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:12:01,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-01-27 20:12:01,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-01-27 20:12:01,967 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:12:01,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:12:01,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1691391857, now seen corresponding path program 55 times [2023-01-27 20:12:01,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:12:01,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004631140] [2023-01-27 20:12:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:12:01,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:12:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:12:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:02,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:12:02,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004631140] [2023-01-27 20:12:02,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004631140] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:12:02,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463443594] [2023-01-27 20:12:02,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:12:02,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:12:02,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:12:02,581 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:12:02,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-01-27 20:12:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:12:03,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:12:03,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:12:03,136 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:12:03,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-27 20:12:03,143 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:12:03,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:12:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:03,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:12:03,376 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:12:03,376 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 40 treesize of output 56 [2023-01-27 20:12:03,393 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:12:03,393 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 20 treesize of output 4 [2023-01-27 20:12:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:03,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463443594] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:12:03,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:12:03,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:12:03,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270432983] [2023-01-27 20:12:03,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:12:03,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:12:03,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:12:03,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:12:03,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:12:03,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:12:03,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 793 transitions, 38026 flow. Second operand has 20 states, 20 states have (on average 165.2) internal successors, (3304), 20 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:03,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:12:03,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:12:03,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:12:06,926 INFO L130 PetriNetUnfolder]: 3481/6075 cut-off events. [2023-01-27 20:12:06,927 INFO L131 PetriNetUnfolder]: For 650897/650897 co-relation queries the response was YES. [2023-01-27 20:12:06,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121334 conditions, 6075 events. 3481/6075 cut-off events. For 650897/650897 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 43059 event pairs, 526 based on Foata normal form. 16/6091 useless extension candidates. Maximal degree in co-relation 121105. Up to 3159 conditions per place. [2023-01-27 20:12:07,039 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 369 selfloop transitions, 472 changer transitions 9/850 dead transitions. [2023-01-27 20:12:07,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 850 transitions, 40663 flow [2023-01-27 20:12:07,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:12:07,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:12:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2359 transitions. [2023-01-27 20:12:07,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445807770961145 [2023-01-27 20:12:07,041 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2359 transitions. [2023-01-27 20:12:07,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2359 transitions. [2023-01-27 20:12:07,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:12:07,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2359 transitions. [2023-01-27 20:12:07,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 168.5) internal successors, (2359), 14 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:07,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:07,046 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:07,047 INFO L175 Difference]: Start difference. First operand has 501 places, 793 transitions, 38026 flow. Second operand 14 states and 2359 transitions. [2023-01-27 20:12:07,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 850 transitions, 40663 flow [2023-01-27 20:12:10,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 850 transitions, 40527 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-01-27 20:12:10,339 INFO L231 Difference]: Finished difference. Result has 510 places, 794 transitions, 38909 flow [2023-01-27 20:12:10,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=37890, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=38909, PETRI_PLACES=510, PETRI_TRANSITIONS=794} [2023-01-27 20:12:10,341 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 487 predicate places. [2023-01-27 20:12:10,342 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 794 transitions, 38909 flow [2023-01-27 20:12:10,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.2) internal successors, (3304), 20 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:10,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:12:10,342 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:12:10,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-01-27 20:12:10,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-01-27 20:12:10,568 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:12:10,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:12:10,568 INFO L85 PathProgramCache]: Analyzing trace with hash 87706125, now seen corresponding path program 56 times [2023-01-27 20:12:10,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:12:10,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311953360] [2023-01-27 20:12:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:12:10,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:12:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:12:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:11,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:12:11,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311953360] [2023-01-27 20:12:11,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311953360] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:12:11,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494276877] [2023-01-27 20:12:11,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:12:11,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:12:11,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:12:11,021 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:12:11,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-01-27 20:12:11,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:12:11,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:12:11,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:12:11,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:12:11,470 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:12:11,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-27 20:12:11,492 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:12:11,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:12:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:11,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:12:11,934 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:12:11,935 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 40 treesize of output 56 [2023-01-27 20:12:11,966 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:12:11,966 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 20 treesize of output 4 [2023-01-27 20:12:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:11,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494276877] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:12:11,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:12:11,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-27 20:12:11,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258325475] [2023-01-27 20:12:11,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:12:11,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:12:11,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:12:11,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:12:11,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:12:11,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:12:11,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 794 transitions, 38909 flow. Second operand has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:11,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:12:11,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:12:11,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:12:15,238 INFO L130 PetriNetUnfolder]: 3475/6025 cut-off events. [2023-01-27 20:12:15,239 INFO L131 PetriNetUnfolder]: For 690631/690631 co-relation queries the response was YES. [2023-01-27 20:12:15,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123340 conditions, 6025 events. 3475/6025 cut-off events. For 690631/690631 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 42373 event pairs, 444 based on Foata normal form. 8/6033 useless extension candidates. Maximal degree in co-relation 123109. Up to 2859 conditions per place. [2023-01-27 20:12:15,610 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 324 selfloop transitions, 522 changer transitions 2/848 dead transitions. [2023-01-27 20:12:15,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 848 transitions, 41621 flow [2023-01-27 20:12:15,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:12:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:12:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2517 transitions. [2023-01-27 20:12:15,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3431492842535787 [2023-01-27 20:12:15,612 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2517 transitions. [2023-01-27 20:12:15,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2517 transitions. [2023-01-27 20:12:15,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:12:15,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2517 transitions. [2023-01-27 20:12:15,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 167.8) internal successors, (2517), 15 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:15,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:15,617 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:15,617 INFO L175 Difference]: Start difference. First operand has 510 places, 794 transitions, 38909 flow. Second operand 15 states and 2517 transitions. [2023-01-27 20:12:15,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 848 transitions, 41621 flow [2023-01-27 20:12:18,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 848 transitions, 41099 flow, removed 24 selfloop flow, removed 37 redundant places. [2023-01-27 20:12:18,826 INFO L231 Difference]: Finished difference. Result has 487 places, 799 transitions, 39753 flow [2023-01-27 20:12:18,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=38332, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=39753, PETRI_PLACES=487, PETRI_TRANSITIONS=799} [2023-01-27 20:12:18,827 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 464 predicate places. [2023-01-27 20:12:18,827 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 799 transitions, 39753 flow [2023-01-27 20:12:18,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:18,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:12:18,828 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:12:18,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-01-27 20:12:19,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:12:19,034 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:12:19,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:12:19,034 INFO L85 PathProgramCache]: Analyzing trace with hash -930237959, now seen corresponding path program 57 times [2023-01-27 20:12:19,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:12:19,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429482266] [2023-01-27 20:12:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:12:19,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:12:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:12:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:19,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:12:19,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429482266] [2023-01-27 20:12:19,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429482266] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:12:19,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740209951] [2023-01-27 20:12:19,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:12:19,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:12:19,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:12:19,611 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:12:19,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-01-27 20:12:19,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:12:19,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:12:19,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:12:19,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:12:20,039 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:12:20,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-27 20:12:20,046 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:12:20,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:12:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:20,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:12:20,286 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 20:12:20,287 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 82 treesize of output 99 [2023-01-27 20:12:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:20,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740209951] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:12:20,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:12:20,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:12:20,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250558973] [2023-01-27 20:12:20,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:12:20,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:12:20,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:12:20,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:12:20,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:12:20,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:12:20,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 799 transitions, 39753 flow. Second operand has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:20,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:12:20,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:12:20,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:12:23,910 INFO L130 PetriNetUnfolder]: 3499/6065 cut-off events. [2023-01-27 20:12:23,910 INFO L131 PetriNetUnfolder]: For 724235/724235 co-relation queries the response was YES. [2023-01-27 20:12:23,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125962 conditions, 6065 events. 3499/6065 cut-off events. For 724235/724235 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 42699 event pairs, 422 based on Foata normal form. 8/6073 useless extension candidates. Maximal degree in co-relation 125757. Up to 2781 conditions per place. [2023-01-27 20:12:24,023 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 339 selfloop transitions, 526 changer transitions 2/867 dead transitions. [2023-01-27 20:12:24,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 867 transitions, 42610 flow [2023-01-27 20:12:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 20:12:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 20:12:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3187 transitions. [2023-01-27 20:12:24,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34302012700462814 [2023-01-27 20:12:24,025 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3187 transitions. [2023-01-27 20:12:24,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3187 transitions. [2023-01-27 20:12:24,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:12:24,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3187 transitions. [2023-01-27 20:12:24,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 167.73684210526315) internal successors, (3187), 19 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:24,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:24,032 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:24,032 INFO L175 Difference]: Start difference. First operand has 487 places, 799 transitions, 39753 flow. Second operand 19 states and 3187 transitions. [2023-01-27 20:12:24,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 867 transitions, 42610 flow [2023-01-27 20:12:27,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 867 transitions, 41962 flow, removed 37 selfloop flow, removed 9 redundant places. [2023-01-27 20:12:27,415 INFO L231 Difference]: Finished difference. Result has 497 places, 803 transitions, 40438 flow [2023-01-27 20:12:27,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=39107, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=40438, PETRI_PLACES=497, PETRI_TRANSITIONS=803} [2023-01-27 20:12:27,416 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 474 predicate places. [2023-01-27 20:12:27,416 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 803 transitions, 40438 flow [2023-01-27 20:12:27,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:27,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:12:27,417 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:12:27,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-01-27 20:12:27,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:12:27,623 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:12:27,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:12:27,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1750033821, now seen corresponding path program 58 times [2023-01-27 20:12:27,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:12:27,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495453097] [2023-01-27 20:12:27,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:12:27,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:12:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:12:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:28,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:12:28,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495453097] [2023-01-27 20:12:28,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495453097] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:12:28,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929389182] [2023-01-27 20:12:28,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:12:28,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:12:28,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:12:28,132 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:12:28,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-01-27 20:12:28,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:12:28,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:12:28,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:12:28,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:12:28,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:12:28,598 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 46 treesize of output 30 [2023-01-27 20:12:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:28,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:12:28,853 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:12:28,853 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 40 treesize of output 56 [2023-01-27 20:12:28,868 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:12:28,868 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 20 treesize of output 4 [2023-01-27 20:12:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:28,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929389182] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:12:28,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:12:28,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:12:28,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372337254] [2023-01-27 20:12:28,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:12:28,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:12:28,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:12:28,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:12:28,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:12:28,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:12:28,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 803 transitions, 40438 flow. Second operand has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:28,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:12:28,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:12:28,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:12:32,234 INFO L130 PetriNetUnfolder]: 3491/6057 cut-off events. [2023-01-27 20:12:32,234 INFO L131 PetriNetUnfolder]: For 747288/747288 co-relation queries the response was YES. [2023-01-27 20:12:32,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127035 conditions, 6057 events. 3491/6057 cut-off events. For 747288/747288 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 42651 event pairs, 506 based on Foata normal form. 8/6065 useless extension candidates. Maximal degree in co-relation 126829. Up to 3109 conditions per place. [2023-01-27 20:12:32,346 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 368 selfloop transitions, 483 changer transitions 9/860 dead transitions. [2023-01-27 20:12:32,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 860 transitions, 42888 flow [2023-01-27 20:12:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:12:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:12:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2527 transitions. [2023-01-27 20:12:32,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445126107702795 [2023-01-27 20:12:32,348 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2527 transitions. [2023-01-27 20:12:32,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2527 transitions. [2023-01-27 20:12:32,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:12:32,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2527 transitions. [2023-01-27 20:12:32,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 168.46666666666667) internal successors, (2527), 15 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:32,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:32,353 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:32,353 INFO L175 Difference]: Start difference. First operand has 497 places, 803 transitions, 40438 flow. Second operand 15 states and 2527 transitions. [2023-01-27 20:12:32,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 860 transitions, 42888 flow [2023-01-27 20:12:35,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 860 transitions, 42225 flow, removed 29 selfloop flow, removed 13 redundant places. [2023-01-27 20:12:35,833 INFO L231 Difference]: Finished difference. Result has 498 places, 800 transitions, 40667 flow [2023-01-27 20:12:35,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=39723, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=40667, PETRI_PLACES=498, PETRI_TRANSITIONS=800} [2023-01-27 20:12:35,834 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 475 predicate places. [2023-01-27 20:12:35,834 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 800 transitions, 40667 flow [2023-01-27 20:12:35,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:35,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:12:35,835 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:12:35,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-01-27 20:12:36,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-01-27 20:12:36,042 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:12:36,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:12:36,042 INFO L85 PathProgramCache]: Analyzing trace with hash -908165391, now seen corresponding path program 59 times [2023-01-27 20:12:36,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:12:36,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545617088] [2023-01-27 20:12:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:12:36,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:12:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:12:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:36,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:12:36,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545617088] [2023-01-27 20:12:36,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545617088] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:12:36,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582405207] [2023-01-27 20:12:36,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:12:36,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:12:36,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:12:36,725 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:12:36,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-01-27 20:12:37,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:12:37,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:12:37,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:12:37,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:12:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:37,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:12:37,512 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 20:12:37,513 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 82 treesize of output 99 [2023-01-27 20:12:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:37,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582405207] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:12:37,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:12:37,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-27 20:12:37,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543245300] [2023-01-27 20:12:37,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:12:37,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:12:37,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:12:37,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:12:37,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:12:37,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:12:37,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 800 transitions, 40667 flow. Second operand has 19 states, 19 states have (on average 165.21052631578948) internal successors, (3139), 19 states have internal predecessors, (3139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:37,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:12:37,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:12:37,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:12:41,091 INFO L130 PetriNetUnfolder]: 3551/6135 cut-off events. [2023-01-27 20:12:41,091 INFO L131 PetriNetUnfolder]: For 789001/789001 co-relation queries the response was YES. [2023-01-27 20:12:41,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130539 conditions, 6135 events. 3551/6135 cut-off events. For 789001/789001 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 43124 event pairs, 418 based on Foata normal form. 8/6143 useless extension candidates. Maximal degree in co-relation 130333. Up to 2843 conditions per place. [2023-01-27 20:12:41,206 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 336 selfloop transitions, 526 changer transitions 2/864 dead transitions. [2023-01-27 20:12:41,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 864 transitions, 43828 flow [2023-01-27 20:12:41,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 20:12:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 20:12:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2683 transitions. [2023-01-27 20:12:41,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3429192229038855 [2023-01-27 20:12:41,208 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2683 transitions. [2023-01-27 20:12:41,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2683 transitions. [2023-01-27 20:12:41,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:12:41,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2683 transitions. [2023-01-27 20:12:41,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 167.6875) internal successors, (2683), 16 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:41,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:41,213 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:41,213 INFO L175 Difference]: Start difference. First operand has 498 places, 800 transitions, 40667 flow. Second operand 16 states and 2683 transitions. [2023-01-27 20:12:41,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 864 transitions, 43828 flow [2023-01-27 20:12:45,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 864 transitions, 43023 flow, removed 72 selfloop flow, removed 16 redundant places. [2023-01-27 20:12:45,163 INFO L231 Difference]: Finished difference. Result has 494 places, 806 transitions, 41945 flow [2023-01-27 20:12:45,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=39878, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=519, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=41945, PETRI_PLACES=494, PETRI_TRANSITIONS=806} [2023-01-27 20:12:45,164 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 471 predicate places. [2023-01-27 20:12:45,164 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 806 transitions, 41945 flow [2023-01-27 20:12:45,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.21052631578948) internal successors, (3139), 19 states have internal predecessors, (3139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:45,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:12:45,165 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:12:45,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-01-27 20:12:45,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-01-27 20:12:45,371 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:12:45,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:12:45,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1784159135, now seen corresponding path program 60 times [2023-01-27 20:12:45,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:12:45,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557885084] [2023-01-27 20:12:45,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:12:45,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:12:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:12:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:45,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:12:45,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557885084] [2023-01-27 20:12:45,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557885084] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:12:45,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828327179] [2023-01-27 20:12:45,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:12:45,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:12:45,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:12:45,981 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:12:45,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-01-27 20:12:46,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:12:46,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:12:46,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-27 20:12:46,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:12:46,491 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:12:46,491 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 46 treesize of output 26 [2023-01-27 20:12:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:46,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:12:46,741 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:12:46,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 20:12:46,757 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:12:46,758 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 20 treesize of output 4 [2023-01-27 20:12:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:46,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828327179] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:12:46,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:12:46,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2023-01-27 20:12:46,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124237749] [2023-01-27 20:12:46,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:12:46,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 20:12:46,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:12:46,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 20:12:46,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:12:46,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-27 20:12:46,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 806 transitions, 41945 flow. Second operand has 22 states, 22 states have (on average 162.1818181818182) internal successors, (3568), 22 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:46,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:12:46,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-27 20:12:46,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:12:50,194 INFO L130 PetriNetUnfolder]: 3531/6095 cut-off events. [2023-01-27 20:12:50,195 INFO L131 PetriNetUnfolder]: For 815852/815852 co-relation queries the response was YES. [2023-01-27 20:12:50,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130107 conditions, 6095 events. 3531/6095 cut-off events. For 815852/815852 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 42739 event pairs, 483 based on Foata normal form. 8/6103 useless extension candidates. Maximal degree in co-relation 129903. Up to 4332 conditions per place. [2023-01-27 20:12:50,321 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 369 selfloop transitions, 456 changer transitions 11/836 dead transitions. [2023-01-27 20:12:50,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 836 transitions, 43801 flow [2023-01-27 20:12:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 20:12:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 20:12:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1984 transitions. [2023-01-27 20:12:50,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.338104976141786 [2023-01-27 20:12:50,323 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1984 transitions. [2023-01-27 20:12:50,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1984 transitions. [2023-01-27 20:12:50,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:12:50,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1984 transitions. [2023-01-27 20:12:50,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 165.33333333333334) internal successors, (1984), 12 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:50,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:50,327 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:50,327 INFO L175 Difference]: Start difference. First operand has 494 places, 806 transitions, 41945 flow. Second operand 12 states and 1984 transitions. [2023-01-27 20:12:50,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 836 transitions, 43801 flow [2023-01-27 20:12:54,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 836 transitions, 43423 flow, removed 4 selfloop flow, removed 14 redundant places. [2023-01-27 20:12:54,202 INFO L231 Difference]: Finished difference. Result has 491 places, 802 transitions, 42391 flow [2023-01-27 20:12:54,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=41513, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=456, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=42391, PETRI_PLACES=491, PETRI_TRANSITIONS=802} [2023-01-27 20:12:54,203 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 468 predicate places. [2023-01-27 20:12:54,203 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 802 transitions, 42391 flow [2023-01-27 20:12:54,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 162.1818181818182) internal successors, (3568), 22 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:54,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:12:54,204 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:12:54,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-01-27 20:12:54,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:12:54,410 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:12:54,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:12:54,411 INFO L85 PathProgramCache]: Analyzing trace with hash -800640279, now seen corresponding path program 61 times [2023-01-27 20:12:54,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:12:54,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349325265] [2023-01-27 20:12:54,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:12:54,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:12:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:12:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 20:12:55,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:12:55,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349325265] [2023-01-27 20:12:55,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349325265] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:12:55,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622220879] [2023-01-27 20:12:55,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:12:55,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:12:55,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:12:55,733 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:12:55,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-01-27 20:12:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:12:56,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:12:56,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:12:56,254 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:12:56,255 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 36 treesize of output 12 [2023-01-27 20:12:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:56,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:12:56,427 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:12:56,428 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 32 treesize of output 48 [2023-01-27 20:12:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:12:56,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622220879] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:12:56,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:12:56,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 26 [2023-01-27 20:12:56,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240455377] [2023-01-27 20:12:56,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:12:56,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 20:12:56,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:12:56,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 20:12:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2023-01-27 20:12:56,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 489 [2023-01-27 20:12:56,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 802 transitions, 42391 flow. Second operand has 26 states, 26 states have (on average 139.07692307692307) internal successors, (3616), 26 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:56,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:12:56,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 489 [2023-01-27 20:12:56,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:13:00,840 INFO L130 PetriNetUnfolder]: 3887/6747 cut-off events. [2023-01-27 20:13:00,840 INFO L131 PetriNetUnfolder]: For 849915/849915 co-relation queries the response was YES. [2023-01-27 20:13:00,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142975 conditions, 6747 events. 3887/6747 cut-off events. For 849915/849915 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 48084 event pairs, 446 based on Foata normal form. 24/6771 useless extension candidates. Maximal degree in co-relation 142801. Up to 2388 conditions per place. [2023-01-27 20:13:00,964 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 863 selfloop transitions, 598 changer transitions 4/1465 dead transitions. [2023-01-27 20:13:00,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1465 transitions, 78922 flow [2023-01-27 20:13:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 20:13:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 20:13:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4148 transitions. [2023-01-27 20:13:00,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2925040547211057 [2023-01-27 20:13:00,988 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4148 transitions. [2023-01-27 20:13:00,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4148 transitions. [2023-01-27 20:13:00,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:13:00,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4148 transitions. [2023-01-27 20:13:00,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 143.0344827586207) internal successors, (4148), 29 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:00,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 489.0) internal successors, (14670), 30 states have internal predecessors, (14670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:00,999 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 489.0) internal successors, (14670), 30 states have internal predecessors, (14670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:00,999 INFO L175 Difference]: Start difference. First operand has 491 places, 802 transitions, 42391 flow. Second operand 29 states and 4148 transitions. [2023-01-27 20:13:00,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1465 transitions, 78922 flow [2023-01-27 20:13:05,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 1465 transitions, 78198 flow, removed 10 selfloop flow, removed 11 redundant places. [2023-01-27 20:13:05,781 INFO L231 Difference]: Finished difference. Result has 505 places, 1009 transitions, 59098 flow [2023-01-27 20:13:05,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=41947, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=59098, PETRI_PLACES=505, PETRI_TRANSITIONS=1009} [2023-01-27 20:13:05,783 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 482 predicate places. [2023-01-27 20:13:05,783 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 1009 transitions, 59098 flow [2023-01-27 20:13:05,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 139.07692307692307) internal successors, (3616), 26 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:05,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:13:05,783 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:13:05,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-01-27 20:13:05,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-01-27 20:13:05,990 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:13:05,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:13:05,990 INFO L85 PathProgramCache]: Analyzing trace with hash 332522005, now seen corresponding path program 62 times [2023-01-27 20:13:05,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:13:05,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517384882] [2023-01-27 20:13:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:13:05,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:13:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:13:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:06,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:13:06,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517384882] [2023-01-27 20:13:06,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517384882] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:13:06,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139777662] [2023-01-27 20:13:06,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:13:06,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:13:06,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:13:06,651 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:13:06,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-01-27 20:13:06,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:13:06,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:13:06,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-27 20:13:06,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:13:07,292 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:13:07,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:13:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:07,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:13:07,611 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:13:07,611 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 32 treesize of output 48 [2023-01-27 20:13:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:07,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139777662] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:13:07,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:13:07,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 26 [2023-01-27 20:13:07,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363525475] [2023-01-27 20:13:07,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:13:07,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 20:13:07,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:13:07,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 20:13:07,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-01-27 20:13:07,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-27 20:13:07,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 1009 transitions, 59098 flow. Second operand has 26 states, 26 states have (on average 162.0) internal successors, (4212), 26 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:07,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:13:07,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-27 20:13:07,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:13:12,714 INFO L130 PetriNetUnfolder]: 4043/7023 cut-off events. [2023-01-27 20:13:12,714 INFO L131 PetriNetUnfolder]: For 885687/885687 co-relation queries the response was YES. [2023-01-27 20:13:12,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149175 conditions, 7023 events. 4043/7023 cut-off events. For 885687/885687 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 49937 event pairs, 148 based on Foata normal form. 44/7067 useless extension candidates. Maximal degree in co-relation 148954. Up to 2858 conditions per place. [2023-01-27 20:13:12,865 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 339 selfloop transitions, 796 changer transitions 2/1137 dead transitions. [2023-01-27 20:13:12,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 1137 transitions, 64520 flow [2023-01-27 20:13:12,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 20:13:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 20:13:12,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3976 transitions. [2023-01-27 20:13:12,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387866394001363 [2023-01-27 20:13:12,869 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3976 transitions. [2023-01-27 20:13:12,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3976 transitions. [2023-01-27 20:13:12,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:13:12,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3976 transitions. [2023-01-27 20:13:12,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 165.66666666666666) internal successors, (3976), 24 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:12,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 489.0) internal successors, (12225), 25 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:12,880 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 489.0) internal successors, (12225), 25 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:12,880 INFO L175 Difference]: Start difference. First operand has 505 places, 1009 transitions, 59098 flow. Second operand 24 states and 3976 transitions. [2023-01-27 20:13:12,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 1137 transitions, 64520 flow [2023-01-27 20:13:17,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 1137 transitions, 64030 flow, removed 92 selfloop flow, removed 16 redundant places. [2023-01-27 20:13:18,050 INFO L231 Difference]: Finished difference. Result has 520 places, 1056 transitions, 62939 flow [2023-01-27 20:13:18,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=58608, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=753, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=62939, PETRI_PLACES=520, PETRI_TRANSITIONS=1056} [2023-01-27 20:13:18,053 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 497 predicate places. [2023-01-27 20:13:18,053 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 1056 transitions, 62939 flow [2023-01-27 20:13:18,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 162.0) internal successors, (4212), 26 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:18,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:13:18,053 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:13:18,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-01-27 20:13:18,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:13:18,260 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:13:18,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:13:18,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1958546207, now seen corresponding path program 63 times [2023-01-27 20:13:18,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:13:18,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063541691] [2023-01-27 20:13:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:13:18,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:13:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:13:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:18,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:13:18,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063541691] [2023-01-27 20:13:18,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063541691] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:13:18,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136508047] [2023-01-27 20:13:18,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:13:18,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:13:18,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:13:18,785 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:13:18,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-01-27 20:13:19,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 20:13:19,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:13:19,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-27 20:13:19,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:13:19,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:13:19,306 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 65 treesize of output 41 [2023-01-27 20:13:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:19,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:13:19,535 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:13:19,536 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 32 treesize of output 48 [2023-01-27 20:13:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:19,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136508047] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:13:19,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:13:19,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 21 [2023-01-27 20:13:19,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321452915] [2023-01-27 20:13:19,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:13:19,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 20:13:19,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:13:19,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 20:13:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:13:19,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:13:19,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 1056 transitions, 62939 flow. Second operand has 21 states, 21 states have (on average 165.0952380952381) internal successors, (3467), 21 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:19,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:13:19,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:13:19,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:13:24,468 INFO L130 PetriNetUnfolder]: 4073/7109 cut-off events. [2023-01-27 20:13:24,468 INFO L131 PetriNetUnfolder]: For 1022253/1022253 co-relation queries the response was YES. [2023-01-27 20:13:24,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154130 conditions, 7109 events. 4073/7109 cut-off events. For 1022253/1022253 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 51072 event pairs, 1425 based on Foata normal form. 20/7129 useless extension candidates. Maximal degree in co-relation 153911. Up to 6207 conditions per place. [2023-01-27 20:13:24,785 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 866 selfloop transitions, 229 changer transitions 1/1096 dead transitions. [2023-01-27 20:13:24,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 1096 transitions, 65990 flow [2023-01-27 20:13:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:13:24,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:13:24,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2193 transitions. [2023-01-27 20:13:24,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3449740443605474 [2023-01-27 20:13:24,787 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2193 transitions. [2023-01-27 20:13:24,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2193 transitions. [2023-01-27 20:13:24,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:13:24,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2193 transitions. [2023-01-27 20:13:24,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.69230769230768) internal successors, (2193), 13 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:24,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:24,791 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:24,791 INFO L175 Difference]: Start difference. First operand has 520 places, 1056 transitions, 62939 flow. Second operand 13 states and 2193 transitions. [2023-01-27 20:13:24,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 1096 transitions, 65990 flow [2023-01-27 20:13:30,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 1096 transitions, 64748 flow, removed 210 selfloop flow, removed 12 redundant places. [2023-01-27 20:13:30,507 INFO L231 Difference]: Finished difference. Result has 524 places, 1064 transitions, 62645 flow [2023-01-27 20:13:30,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=61709, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1056, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=62645, PETRI_PLACES=524, PETRI_TRANSITIONS=1064} [2023-01-27 20:13:30,508 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 501 predicate places. [2023-01-27 20:13:30,508 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 1064 transitions, 62645 flow [2023-01-27 20:13:30,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.0952380952381) internal successors, (3467), 21 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:30,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:13:30,509 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:13:30,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-01-27 20:13:30,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:13:30,732 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:13:30,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:13:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1513938723, now seen corresponding path program 64 times [2023-01-27 20:13:30,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:13:30,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950357335] [2023-01-27 20:13:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:13:30,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:13:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:13:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:31,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:13:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950357335] [2023-01-27 20:13:31,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950357335] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:13:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96862900] [2023-01-27 20:13:31,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:13:31,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:13:31,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:13:31,205 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:13:31,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-01-27 20:13:31,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:13:31,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:13:31,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:13:31,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:13:31,683 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:13:31,689 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 55 treesize of output 23 [2023-01-27 20:13:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:31,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:13:31,868 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:13:31,869 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 32 treesize of output 48 [2023-01-27 20:13:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:31,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96862900] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:13:31,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:13:31,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-27 20:13:31,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551553198] [2023-01-27 20:13:31,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:13:31,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:13:31,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:13:31,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:13:31,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:13:31,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:13:31,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 1064 transitions, 62645 flow. Second operand has 19 states, 19 states have (on average 165.31578947368422) internal successors, (3141), 19 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:31,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:13:31,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:13:31,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:13:36,352 INFO L130 PetriNetUnfolder]: 4117/7185 cut-off events. [2023-01-27 20:13:36,352 INFO L131 PetriNetUnfolder]: For 1017127/1017127 co-relation queries the response was YES. [2023-01-27 20:13:36,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154430 conditions, 7185 events. 4117/7185 cut-off events. For 1017127/1017127 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 51740 event pairs, 1430 based on Foata normal form. 24/7209 useless extension candidates. Maximal degree in co-relation 154211. Up to 6321 conditions per place. [2023-01-27 20:13:36,670 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 879 selfloop transitions, 217 changer transitions 1/1097 dead transitions. [2023-01-27 20:13:36,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 1097 transitions, 65531 flow [2023-01-27 20:13:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:13:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:13:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1689 transitions. [2023-01-27 20:13:36,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345398773006135 [2023-01-27 20:13:36,672 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1689 transitions. [2023-01-27 20:13:36,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1689 transitions. [2023-01-27 20:13:36,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:13:36,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1689 transitions. [2023-01-27 20:13:36,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.9) internal successors, (1689), 10 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:36,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:36,675 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:36,675 INFO L175 Difference]: Start difference. First operand has 524 places, 1064 transitions, 62645 flow. Second operand 10 states and 1689 transitions. [2023-01-27 20:13:36,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 1097 transitions, 65531 flow [2023-01-27 20:13:41,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 1097 transitions, 65000 flow, removed 48 selfloop flow, removed 7 redundant places. [2023-01-27 20:13:42,010 INFO L231 Difference]: Finished difference. Result has 528 places, 1070 transitions, 62785 flow [2023-01-27 20:13:42,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=61972, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1062, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=845, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=62785, PETRI_PLACES=528, PETRI_TRANSITIONS=1070} [2023-01-27 20:13:42,018 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 505 predicate places. [2023-01-27 20:13:42,018 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 1070 transitions, 62785 flow [2023-01-27 20:13:42,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.31578947368422) internal successors, (3141), 19 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:42,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:13:42,019 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:13:42,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-01-27 20:13:42,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-01-27 20:13:42,226 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:13:42,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:13:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash -499439099, now seen corresponding path program 65 times [2023-01-27 20:13:42,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:13:42,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395325193] [2023-01-27 20:13:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:13:42,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:13:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:13:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:42,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:13:42,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395325193] [2023-01-27 20:13:42,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395325193] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:13:42,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454853480] [2023-01-27 20:13:42,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:13:42,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:13:42,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:13:42,766 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:13:42,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-01-27 20:13:43,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:13:43,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:13:43,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-27 20:13:43,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:13:43,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:13:43,225 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 46 treesize of output 34 [2023-01-27 20:13:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:43,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:13:43,480 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:13:43,480 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 32 treesize of output 48 [2023-01-27 20:13:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:43,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454853480] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:13:43,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:13:43,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-01-27 20:13:43,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570256941] [2023-01-27 20:13:43,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:13:43,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 20:13:43,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:13:43,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 20:13:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:13:43,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:13:43,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 1070 transitions, 62785 flow. Second operand has 24 states, 24 states have (on average 165.16666666666666) internal successors, (3964), 24 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:43,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:13:43,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:13:43,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:13:48,340 INFO L130 PetriNetUnfolder]: 4099/7123 cut-off events. [2023-01-27 20:13:48,340 INFO L131 PetriNetUnfolder]: For 1019555/1019555 co-relation queries the response was YES. [2023-01-27 20:13:48,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153314 conditions, 7123 events. 4099/7123 cut-off events. For 1019555/1019555 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 51104 event pairs, 1438 based on Foata normal form. 4/7127 useless extension candidates. Maximal degree in co-relation 153093. Up to 6315 conditions per place. [2023-01-27 20:13:48,484 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 862 selfloop transitions, 215 changer transitions 3/1080 dead transitions. [2023-01-27 20:13:48,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 1080 transitions, 64635 flow [2023-01-27 20:13:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:13:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:13:48,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1516 transitions. [2023-01-27 20:13:48,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34446716655305615 [2023-01-27 20:13:48,486 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1516 transitions. [2023-01-27 20:13:48,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1516 transitions. [2023-01-27 20:13:48,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:13:48,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1516 transitions. [2023-01-27 20:13:48,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.44444444444446) internal successors, (1516), 9 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:48,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:48,489 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:48,489 INFO L175 Difference]: Start difference. First operand has 528 places, 1070 transitions, 62785 flow. Second operand 9 states and 1516 transitions. [2023-01-27 20:13:48,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 1080 transitions, 64635 flow [2023-01-27 20:13:54,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 1080 transitions, 64064 flow, removed 76 selfloop flow, removed 8 redundant places. [2023-01-27 20:13:54,130 INFO L231 Difference]: Finished difference. Result has 526 places, 1064 transitions, 62204 flow [2023-01-27 20:13:54,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=61786, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1065, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=850, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=62204, PETRI_PLACES=526, PETRI_TRANSITIONS=1064} [2023-01-27 20:13:54,132 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 503 predicate places. [2023-01-27 20:13:54,132 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 1064 transitions, 62204 flow [2023-01-27 20:13:54,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 165.16666666666666) internal successors, (3964), 24 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:54,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:13:54,132 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:13:54,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-01-27 20:13:54,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:13:54,339 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:13:54,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:13:54,340 INFO L85 PathProgramCache]: Analyzing trace with hash -715912885, now seen corresponding path program 66 times [2023-01-27 20:13:54,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:13:54,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697679295] [2023-01-27 20:13:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:13:54,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:13:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:13:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:54,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:13:54,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697679295] [2023-01-27 20:13:54,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697679295] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:13:54,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664964766] [2023-01-27 20:13:54,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:13:54,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:13:54,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:13:54,989 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:13:54,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-01-27 20:13:55,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 20:13:55,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:13:55,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-27 20:13:55,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:13:55,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:13:55,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 35 [2023-01-27 20:13:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:55,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:13:56,254 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 20:13:56,254 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 71 treesize of output 88 [2023-01-27 20:13:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:13:56,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664964766] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:13:56,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:13:56,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2023-01-27 20:13:56,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969496774] [2023-01-27 20:13:56,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:13:56,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 20:13:56,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:13:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 20:13:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:13:56,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:13:56,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 1064 transitions, 62204 flow. Second operand has 24 states, 24 states have (on average 164.91666666666666) internal successors, (3958), 24 states have internal predecessors, (3958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:56,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:13:56,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:13:56,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:01,461 INFO L130 PetriNetUnfolder]: 4147/7235 cut-off events. [2023-01-27 20:14:01,461 INFO L131 PetriNetUnfolder]: For 1000935/1000935 co-relation queries the response was YES. [2023-01-27 20:14:01,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155069 conditions, 7235 events. 4147/7235 cut-off events. For 1000935/1000935 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 52141 event pairs, 568 based on Foata normal form. 36/7271 useless extension candidates. Maximal degree in co-relation 154849. Up to 3605 conditions per place. [2023-01-27 20:14:01,603 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 433 selfloop transitions, 689 changer transitions 2/1124 dead transitions. [2023-01-27 20:14:01,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1124 transitions, 65471 flow [2023-01-27 20:14:01,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 20:14:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 20:14:01,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2864 transitions. [2023-01-27 20:14:01,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34452063033802477 [2023-01-27 20:14:01,605 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2864 transitions. [2023-01-27 20:14:01,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2864 transitions. [2023-01-27 20:14:01,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:01,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2864 transitions. [2023-01-27 20:14:01,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 168.47058823529412) internal successors, (2864), 17 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:01,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:01,611 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:01,611 INFO L175 Difference]: Start difference. First operand has 526 places, 1064 transitions, 62204 flow. Second operand 17 states and 2864 transitions. [2023-01-27 20:14:01,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1124 transitions, 65471 flow [2023-01-27 20:14:07,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 1124 transitions, 65041 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-01-27 20:14:07,598 INFO L231 Difference]: Finished difference. Result has 537 places, 1073 transitions, 63718 flow [2023-01-27 20:14:07,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=61600, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1062, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=681, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=63718, PETRI_PLACES=537, PETRI_TRANSITIONS=1073} [2023-01-27 20:14:07,599 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 514 predicate places. [2023-01-27 20:14:07,599 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 1073 transitions, 63718 flow [2023-01-27 20:14:07,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 164.91666666666666) internal successors, (3958), 24 states have internal predecessors, (3958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:07,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:07,600 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:07,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-01-27 20:14:07,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:07,807 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:07,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:07,808 INFO L85 PathProgramCache]: Analyzing trace with hash -287115501, now seen corresponding path program 67 times [2023-01-27 20:14:07,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:07,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531380297] [2023-01-27 20:14:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:07,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:14:08,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:08,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531380297] [2023-01-27 20:14:08,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531380297] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:08,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837697924] [2023-01-27 20:14:08,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:14:08,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:08,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:08,512 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:14:08,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-01-27 20:14:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:08,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:14:08,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:08,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:14:08,948 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 46 treesize of output 30 [2023-01-27 20:14:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:14:09,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:09,151 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:14:09,151 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 20 treesize of output 4 [2023-01-27 20:14:09,219 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:14:09,220 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 40 treesize of output 56 [2023-01-27 20:14:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:14:09,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837697924] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:09,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:09,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:14:09,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773360103] [2023-01-27 20:14:09,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:09,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:14:09,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:09,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:14:09,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:14:09,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:14:09,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 1073 transitions, 63718 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:09,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:09,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:14:09,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:14,621 INFO L130 PetriNetUnfolder]: 4191/7355 cut-off events. [2023-01-27 20:14:14,621 INFO L131 PetriNetUnfolder]: For 1074949/1074949 co-relation queries the response was YES. [2023-01-27 20:14:14,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159725 conditions, 7355 events. 4191/7355 cut-off events. For 1074949/1074949 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 53536 event pairs, 1476 based on Foata normal form. 12/7367 useless extension candidates. Maximal degree in co-relation 159501. Up to 6429 conditions per place. [2023-01-27 20:14:14,761 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 915 selfloop transitions, 199 changer transitions 1/1115 dead transitions. [2023-01-27 20:14:14,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1115 transitions, 66943 flow [2023-01-27 20:14:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:14:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:14:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2523 transitions. [2023-01-27 20:14:14,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439672801635992 [2023-01-27 20:14:14,763 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2523 transitions. [2023-01-27 20:14:14,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2523 transitions. [2023-01-27 20:14:14,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:14,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2523 transitions. [2023-01-27 20:14:14,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 168.2) internal successors, (2523), 15 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:14,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:14,768 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:14,769 INFO L175 Difference]: Start difference. First operand has 537 places, 1073 transitions, 63718 flow. Second operand 15 states and 2523 transitions. [2023-01-27 20:14:14,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 1115 transitions, 66943 flow [2023-01-27 20:14:20,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 1115 transitions, 66457 flow, removed 110 selfloop flow, removed 9 redundant places. [2023-01-27 20:14:20,468 INFO L231 Difference]: Finished difference. Result has 545 places, 1085 transitions, 64464 flow [2023-01-27 20:14:20,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=63232, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=64464, PETRI_PLACES=545, PETRI_TRANSITIONS=1085} [2023-01-27 20:14:20,470 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 522 predicate places. [2023-01-27 20:14:20,470 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 1085 transitions, 64464 flow [2023-01-27 20:14:20,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:20,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:20,470 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:20,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-01-27 20:14:20,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:20,678 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:20,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:20,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1259857799, now seen corresponding path program 68 times [2023-01-27 20:14:20,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:20,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053272904] [2023-01-27 20:14:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:20,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:14:21,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:21,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053272904] [2023-01-27 20:14:21,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053272904] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:21,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439991721] [2023-01-27 20:14:21,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:14:21,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:21,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:21,173 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:14:21,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-01-27 20:14:21,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:14:21,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:14:21,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-27 20:14:21,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:21,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:14:21,644 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 46 treesize of output 30 [2023-01-27 20:14:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:14:21,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:22,201 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:14:22,201 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 20 treesize of output 4 [2023-01-27 20:14:22,263 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:14:22,263 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 40 treesize of output 56 [2023-01-27 20:14:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:14:22,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439991721] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:22,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:22,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2023-01-27 20:14:22,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174757435] [2023-01-27 20:14:22,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:22,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 20:14:22,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:22,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 20:14:22,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-01-27 20:14:22,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-27 20:14:22,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 1085 transitions, 64464 flow. Second operand has 25 states, 25 states have (on average 162.0) internal successors, (4050), 25 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:22,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:22,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-27 20:14:22,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:28,109 INFO L130 PetriNetUnfolder]: 4295/7591 cut-off events. [2023-01-27 20:14:28,109 INFO L131 PetriNetUnfolder]: For 1071109/1071109 co-relation queries the response was YES. [2023-01-27 20:14:28,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164321 conditions, 7591 events. 4295/7591 cut-off events. For 1071109/1071109 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 55757 event pairs, 305 based on Foata normal form. 36/7627 useless extension candidates. Maximal degree in co-relation 164093. Up to 5050 conditions per place. [2023-01-27 20:14:28,252 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 408 selfloop transitions, 762 changer transitions 0/1170 dead transitions. [2023-01-27 20:14:28,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 1170 transitions, 69128 flow [2023-01-27 20:14:28,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-27 20:14:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-27 20:14:28,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4127 transitions. [2023-01-27 20:14:28,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33758691206543967 [2023-01-27 20:14:28,254 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4127 transitions. [2023-01-27 20:14:28,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4127 transitions. [2023-01-27 20:14:28,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:28,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4127 transitions. [2023-01-27 20:14:28,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 165.08) internal successors, (4127), 25 states have internal predecessors, (4127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:28,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:28,263 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:28,263 INFO L175 Difference]: Start difference. First operand has 545 places, 1085 transitions, 64464 flow. Second operand 25 states and 4127 transitions. [2023-01-27 20:14:28,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 1170 transitions, 69128 flow [2023-01-27 20:14:34,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 1170 transitions, 68617 flow, removed 153 selfloop flow, removed 6 redundant places. [2023-01-27 20:14:34,266 INFO L231 Difference]: Finished difference. Result has 571 places, 1116 transitions, 68696 flow [2023-01-27 20:14:34,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=63953, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1085, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=735, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=68696, PETRI_PLACES=571, PETRI_TRANSITIONS=1116} [2023-01-27 20:14:34,267 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 548 predicate places. [2023-01-27 20:14:34,267 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 1116 transitions, 68696 flow [2023-01-27 20:14:34,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 162.0) internal successors, (4050), 25 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:34,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:34,268 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:34,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-01-27 20:14:34,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-01-27 20:14:34,475 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:34,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:34,475 INFO L85 PathProgramCache]: Analyzing trace with hash 484490999, now seen corresponding path program 69 times [2023-01-27 20:14:34,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:34,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019892578] [2023-01-27 20:14:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:34,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:14:34,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:34,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019892578] [2023-01-27 20:14:34,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019892578] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:34,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494215461] [2023-01-27 20:14:34,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:14:34,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:34,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:34,962 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:14:34,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-01-27 20:14:35,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 20:14:35,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:14:35,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:14:35,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:35,502 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:14:35,502 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 55 treesize of output 23 [2023-01-27 20:14:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:14:35,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:35,628 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:14:35,628 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 20 treesize of output 4 [2023-01-27 20:14:35,664 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:14:35,664 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 40 treesize of output 56 [2023-01-27 20:14:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:14:35,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494215461] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:35,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:35,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-27 20:14:35,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056629826] [2023-01-27 20:14:35,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:35,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:14:35,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:35,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:14:35,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:14:35,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:14:35,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 1116 transitions, 68696 flow. Second operand has 19 states, 19 states have (on average 165.31578947368422) internal successors, (3141), 19 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:35,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:35,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:14:35,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:40,562 INFO L130 PetriNetUnfolder]: 4317/7629 cut-off events. [2023-01-27 20:14:40,562 INFO L131 PetriNetUnfolder]: For 1176719/1176719 co-relation queries the response was YES. [2023-01-27 20:14:40,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170978 conditions, 7629 events. 4317/7629 cut-off events. For 1176719/1176719 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 56112 event pairs, 1560 based on Foata normal form. 24/7653 useless extension candidates. Maximal degree in co-relation 170741. Up to 6763 conditions per place. [2023-01-27 20:14:40,717 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 948 selfloop transitions, 193 changer transitions 0/1141 dead transitions. [2023-01-27 20:14:40,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1141 transitions, 71673 flow [2023-01-27 20:14:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:14:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:14:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1686 transitions. [2023-01-27 20:14:40,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34478527607361964 [2023-01-27 20:14:40,718 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1686 transitions. [2023-01-27 20:14:40,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1686 transitions. [2023-01-27 20:14:40,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:40,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1686 transitions. [2023-01-27 20:14:40,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.6) internal successors, (1686), 10 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:40,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:40,721 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:40,722 INFO L175 Difference]: Start difference. First operand has 571 places, 1116 transitions, 68696 flow. Second operand 10 states and 1686 transitions. [2023-01-27 20:14:40,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1141 transitions, 71673 flow [2023-01-27 20:14:47,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1141 transitions, 70855 flow, removed 249 selfloop flow, removed 10 redundant places. [2023-01-27 20:14:48,032 INFO L231 Difference]: Finished difference. Result has 572 places, 1122 transitions, 68547 flow [2023-01-27 20:14:48,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=67734, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=921, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=68547, PETRI_PLACES=572, PETRI_TRANSITIONS=1122} [2023-01-27 20:14:48,033 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 549 predicate places. [2023-01-27 20:14:48,033 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 1122 transitions, 68547 flow [2023-01-27 20:14:48,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.31578947368422) internal successors, (3141), 19 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:48,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:48,034 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:48,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-01-27 20:14:48,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:48,240 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:48,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:48,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1468189613, now seen corresponding path program 70 times [2023-01-27 20:14:48,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:48,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192330777] [2023-01-27 20:14:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:48,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:14:48,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:48,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192330777] [2023-01-27 20:14:48,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192330777] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:48,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023475956] [2023-01-27 20:14:48,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:14:48,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:48,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:48,753 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:14:48,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-01-27 20:14:49,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:14:49,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:14:49,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:14:49,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:14:49,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:49,407 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:14:49,408 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 20 treesize of output 4 [2023-01-27 20:14:49,441 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:14:49,441 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 40 treesize of output 56 [2023-01-27 20:14:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:14:49,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023475956] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:49,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:49,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:14:49,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054994726] [2023-01-27 20:14:49,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:49,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:14:49,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:49,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:14:49,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:14:49,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:14:49,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 1122 transitions, 68547 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:49,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:49,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:14:49,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:54,317 INFO L130 PetriNetUnfolder]: 4305/7593 cut-off events. [2023-01-27 20:14:54,317 INFO L131 PetriNetUnfolder]: For 1159910/1159910 co-relation queries the response was YES. [2023-01-27 20:14:54,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169668 conditions, 7593 events. 4305/7593 cut-off events. For 1159910/1159910 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 55694 event pairs, 1572 based on Foata normal form. 4/7597 useless extension candidates. Maximal degree in co-relation 169429. Up to 6813 conditions per place. [2023-01-27 20:14:54,473 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 948 selfloop transitions, 175 changer transitions 7/1130 dead transitions. [2023-01-27 20:14:54,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1130 transitions, 70854 flow [2023-01-27 20:14:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:14:54,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:14:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1510 transitions. [2023-01-27 20:14:54,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310384003635536 [2023-01-27 20:14:54,474 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1510 transitions. [2023-01-27 20:14:54,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1510 transitions. [2023-01-27 20:14:54,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:54,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1510 transitions. [2023-01-27 20:14:54,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.77777777777777) internal successors, (1510), 9 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:54,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:54,477 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:54,477 INFO L175 Difference]: Start difference. First operand has 572 places, 1122 transitions, 68547 flow. Second operand 9 states and 1510 transitions. [2023-01-27 20:14:54,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1130 transitions, 70854 flow [2023-01-27 20:15:01,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 1130 transitions, 70330 flow, removed 79 selfloop flow, removed 6 redundant places. [2023-01-27 20:15:01,334 INFO L231 Difference]: Finished difference. Result has 576 places, 1118 transitions, 68121 flow [2023-01-27 20:15:01,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=68023, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=947, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=68121, PETRI_PLACES=576, PETRI_TRANSITIONS=1118} [2023-01-27 20:15:01,335 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 553 predicate places. [2023-01-27 20:15:01,335 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1118 transitions, 68121 flow [2023-01-27 20:15:01,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:01,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:01,335 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:01,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:01,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:01,542 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:01,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash 863135569, now seen corresponding path program 71 times [2023-01-27 20:15:01,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:01,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364025169] [2023-01-27 20:15:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:01,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:02,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:02,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364025169] [2023-01-27 20:15:02,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364025169] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:02,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922496467] [2023-01-27 20:15:02,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:15:02,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:02,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:02,219 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:02,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-01-27 20:15:02,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:15:02,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:02,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:15:02,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:02,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:02,730 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 46 treesize of output 30 [2023-01-27 20:15:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:02,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:02,947 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:15:02,948 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 20 treesize of output 4 [2023-01-27 20:15:02,982 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:15:02,982 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 40 treesize of output 56 [2023-01-27 20:15:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:03,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922496467] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:03,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:03,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:15:03,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042013921] [2023-01-27 20:15:03,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:03,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:15:03,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:03,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:15:03,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:15:03,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:15:03,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1118 transitions, 68121 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:03,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:03,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:15:03,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:08,074 INFO L130 PetriNetUnfolder]: 4275/7513 cut-off events. [2023-01-27 20:15:08,075 INFO L131 PetriNetUnfolder]: For 1144591/1144591 co-relation queries the response was YES. [2023-01-27 20:15:08,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168494 conditions, 7513 events. 4275/7513 cut-off events. For 1144591/1144591 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 54704 event pairs, 1532 based on Foata normal form. 20/7533 useless extension candidates. Maximal degree in co-relation 168253. Up to 6709 conditions per place. [2023-01-27 20:15:08,402 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 936 selfloop transitions, 187 changer transitions 0/1123 dead transitions. [2023-01-27 20:15:08,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1123 transitions, 70131 flow [2023-01-27 20:15:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:15:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:15:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1683 transitions. [2023-01-27 20:15:08,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3441717791411043 [2023-01-27 20:15:08,403 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1683 transitions. [2023-01-27 20:15:08,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1683 transitions. [2023-01-27 20:15:08,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:08,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1683 transitions. [2023-01-27 20:15:08,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.3) internal successors, (1683), 10 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:08,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:08,406 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:08,406 INFO L175 Difference]: Start difference. First operand has 576 places, 1118 transitions, 68121 flow. Second operand 10 states and 1683 transitions. [2023-01-27 20:15:08,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1123 transitions, 70131 flow [2023-01-27 20:15:14,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1123 transitions, 69773 flow, removed 4 selfloop flow, removed 9 redundant places. [2023-01-27 20:15:14,751 INFO L231 Difference]: Finished difference. Result has 570 places, 1112 transitions, 67839 flow [2023-01-27 20:15:14,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=67465, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=67839, PETRI_PLACES=570, PETRI_TRANSITIONS=1112} [2023-01-27 20:15:14,752 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 547 predicate places. [2023-01-27 20:15:14,752 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 1112 transitions, 67839 flow [2023-01-27 20:15:14,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:14,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:14,753 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:14,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:14,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-01-27 20:15:14,960 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:14,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:14,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1818498919, now seen corresponding path program 72 times [2023-01-27 20:15:14,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:14,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328738135] [2023-01-27 20:15:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:14,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:15,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:15,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328738135] [2023-01-27 20:15:15,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328738135] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:15,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439598167] [2023-01-27 20:15:15,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:15:15,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:15,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:15,513 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:15,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-01-27 20:15:16,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:15:16,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:16,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:15:16,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:16,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:16,496 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 20:15:16,496 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 71 treesize of output 88 [2023-01-27 20:15:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:16,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439598167] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:16,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:16,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-01-27 20:15:16,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308759564] [2023-01-27 20:15:16,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:16,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 20:15:16,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 20:15:16,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:15:16,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:15:16,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 1112 transitions, 67839 flow. Second operand has 21 states, 21 states have (on average 165.0952380952381) internal successors, (3467), 21 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:16,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:16,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:15:16,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:21,562 INFO L130 PetriNetUnfolder]: 4273/7517 cut-off events. [2023-01-27 20:15:21,563 INFO L131 PetriNetUnfolder]: For 1149482/1149482 co-relation queries the response was YES. [2023-01-27 20:15:21,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168545 conditions, 7517 events. 4273/7517 cut-off events. For 1149482/1149482 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 54912 event pairs, 1556 based on Foata normal form. 4/7521 useless extension candidates. Maximal degree in co-relation 168307. Up to 6747 conditions per place. [2023-01-27 20:15:21,722 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 933 selfloop transitions, 183 changer transitions 6/1122 dead transitions. [2023-01-27 20:15:21,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 1122 transitions, 70271 flow [2023-01-27 20:15:21,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:15:21,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:15:21,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1512 transitions. [2023-01-27 20:15:21,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34355828220858897 [2023-01-27 20:15:21,723 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1512 transitions. [2023-01-27 20:15:21,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1512 transitions. [2023-01-27 20:15:21,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:21,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1512 transitions. [2023-01-27 20:15:21,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.0) internal successors, (1512), 9 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:21,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:21,728 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:21,728 INFO L175 Difference]: Start difference. First operand has 570 places, 1112 transitions, 67839 flow. Second operand 9 states and 1512 transitions. [2023-01-27 20:15:21,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 1122 transitions, 70271 flow [2023-01-27 20:15:28,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 1122 transitions, 69893 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-01-27 20:15:28,771 INFO L231 Difference]: Finished difference. Result has 570 places, 1110 transitions, 67816 flow [2023-01-27 20:15:28,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=67465, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=67816, PETRI_PLACES=570, PETRI_TRANSITIONS=1110} [2023-01-27 20:15:28,773 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 547 predicate places. [2023-01-27 20:15:28,773 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 1110 transitions, 67816 flow [2023-01-27 20:15:28,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.0952380952381) internal successors, (3467), 21 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:28,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:28,773 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:28,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:28,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:28,980 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:28,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:28,981 INFO L85 PathProgramCache]: Analyzing trace with hash 595929495, now seen corresponding path program 73 times [2023-01-27 20:15:28,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:28,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139969224] [2023-01-27 20:15:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:28,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:29,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:29,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139969224] [2023-01-27 20:15:29,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139969224] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:29,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168813673] [2023-01-27 20:15:29,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:15:29,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:29,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:29,554 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:29,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-01-27 20:15:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:29,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:15:29,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:30,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:30,107 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 68 treesize of output 60 [2023-01-27 20:15:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:30,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:30,274 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 20:15:30,274 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 71 treesize of output 88 [2023-01-27 20:15:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:30,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168813673] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:30,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:30,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:15:30,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330159038] [2023-01-27 20:15:30,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:30,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:15:30,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:30,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:15:30,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:15:30,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:15:30,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 1110 transitions, 67816 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:30,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:30,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:15:30,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:35,366 INFO L130 PetriNetUnfolder]: 4249/7441 cut-off events. [2023-01-27 20:15:35,366 INFO L131 PetriNetUnfolder]: For 1151500/1151500 co-relation queries the response was YES. [2023-01-27 20:15:35,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167112 conditions, 7441 events. 4249/7441 cut-off events. For 1151500/1151500 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 53995 event pairs, 1544 based on Foata normal form. 4/7445 useless extension candidates. Maximal degree in co-relation 166873. Up to 6677 conditions per place. [2023-01-27 20:15:35,513 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 932 selfloop transitions, 175 changer transitions 10/1117 dead transitions. [2023-01-27 20:15:35,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 1117 transitions, 69917 flow [2023-01-27 20:15:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:15:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:15:35,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1510 transitions. [2023-01-27 20:15:35,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310384003635536 [2023-01-27 20:15:35,514 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1510 transitions. [2023-01-27 20:15:35,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1510 transitions. [2023-01-27 20:15:35,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:35,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1510 transitions. [2023-01-27 20:15:35,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.77777777777777) internal successors, (1510), 9 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:35,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:35,517 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:35,517 INFO L175 Difference]: Start difference. First operand has 570 places, 1110 transitions, 67816 flow. Second operand 9 states and 1510 transitions. [2023-01-27 20:15:35,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 1117 transitions, 69917 flow [2023-01-27 20:15:41,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 1117 transitions, 69547 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-01-27 20:15:42,008 INFO L231 Difference]: Finished difference. Result has 570 places, 1101 transitions, 67252 flow [2023-01-27 20:15:42,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=67260, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=67252, PETRI_PLACES=570, PETRI_TRANSITIONS=1101} [2023-01-27 20:15:42,009 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 547 predicate places. [2023-01-27 20:15:42,010 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 1101 transitions, 67252 flow [2023-01-27 20:15:42,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:42,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:42,010 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:42,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:42,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:42,217 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:42,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:42,218 INFO L85 PathProgramCache]: Analyzing trace with hash 177218349, now seen corresponding path program 74 times [2023-01-27 20:15:42,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:42,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025589824] [2023-01-27 20:15:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:42,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:42,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:42,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025589824] [2023-01-27 20:15:42,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025589824] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:42,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382796142] [2023-01-27 20:15:42,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:15:42,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:42,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:42,706 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:42,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-01-27 20:15:43,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:15:43,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:43,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:15:43,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:43,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:43,224 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 65 treesize of output 41 [2023-01-27 20:15:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:43,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:43,410 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:15:43,410 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 20 treesize of output 4 [2023-01-27 20:15:43,443 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:15:43,443 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 40 treesize of output 56 [2023-01-27 20:15:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:43,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382796142] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:43,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:43,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:15:43,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597725833] [2023-01-27 20:15:43,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:43,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:15:43,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:43,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:15:43,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:15:43,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:15:43,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 1101 transitions, 67252 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:43,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:43,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:15:43,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:48,039 INFO L130 PetriNetUnfolder]: 4219/7333 cut-off events. [2023-01-27 20:15:48,039 INFO L131 PetriNetUnfolder]: For 1147947/1147947 co-relation queries the response was YES. [2023-01-27 20:15:48,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165138 conditions, 7333 events. 4219/7333 cut-off events. For 1147947/1147947 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 52787 event pairs, 1511 based on Foata normal form. 4/7337 useless extension candidates. Maximal degree in co-relation 164899. Up to 6551 conditions per place. [2023-01-27 20:15:48,418 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 915 selfloop transitions, 183 changer transitions 2/1100 dead transitions. [2023-01-27 20:15:48,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 1100 transitions, 68811 flow [2023-01-27 20:15:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:15:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:15:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1513 transitions. [2023-01-27 20:15:48,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34378550329470575 [2023-01-27 20:15:48,419 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1513 transitions. [2023-01-27 20:15:48,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1513 transitions. [2023-01-27 20:15:48,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:48,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1513 transitions. [2023-01-27 20:15:48,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.11111111111111) internal successors, (1513), 9 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:48,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:48,422 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:48,422 INFO L175 Difference]: Start difference. First operand has 570 places, 1101 transitions, 67252 flow. Second operand 9 states and 1513 transitions. [2023-01-27 20:15:48,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 1100 transitions, 68811 flow [2023-01-27 20:15:54,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 1100 transitions, 68405 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-01-27 20:15:54,642 INFO L231 Difference]: Finished difference. Result has 558 places, 1092 transitions, 66523 flow [2023-01-27 20:15:54,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=66166, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1093, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=910, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=66523, PETRI_PLACES=558, PETRI_TRANSITIONS=1092} [2023-01-27 20:15:54,644 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 535 predicate places. [2023-01-27 20:15:54,644 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 1092 transitions, 66523 flow [2023-01-27 20:15:54,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:54,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:54,644 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:54,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:54,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:54,852 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:54,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:54,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1482367385, now seen corresponding path program 75 times [2023-01-27 20:15:54,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:54,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343402343] [2023-01-27 20:15:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:54,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:55,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:55,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343402343] [2023-01-27 20:15:55,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343402343] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:55,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138312104] [2023-01-27 20:15:55,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:15:55,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:55,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:55,668 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:55,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-01-27 20:15:56,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 20:15:56,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:56,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:15:56,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:56,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:56,187 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 58 treesize of output 51 [2023-01-27 20:15:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:56,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:56,418 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 20:15:56,419 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 71 treesize of output 88 [2023-01-27 20:15:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:15:56,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138312104] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:56,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:56,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 22 [2023-01-27 20:15:56,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938024847] [2023-01-27 20:15:56,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:56,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 20:15:56,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:56,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 20:15:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:15:56,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:15:56,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 1092 transitions, 66523 flow. Second operand has 22 states, 22 states have (on average 165.04545454545453) internal successors, (3631), 22 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:56,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:56,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:15:56,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:01,218 INFO L130 PetriNetUnfolder]: 4241/7387 cut-off events. [2023-01-27 20:16:01,218 INFO L131 PetriNetUnfolder]: For 1123826/1123826 co-relation queries the response was YES. [2023-01-27 20:16:01,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166325 conditions, 7387 events. 4241/7387 cut-off events. For 1123826/1123826 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 53341 event pairs, 1500 based on Foata normal form. 20/7407 useless extension candidates. Maximal degree in co-relation 166089. Up to 6839 conditions per place. [2023-01-27 20:16:01,371 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 993 selfloop transitions, 122 changer transitions 0/1115 dead transitions. [2023-01-27 20:16:01,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 1115 transitions, 69249 flow [2023-01-27 20:16:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:16:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:16:01,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1688 transitions. [2023-01-27 20:16:01,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34519427402862984 [2023-01-27 20:16:01,373 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1688 transitions. [2023-01-27 20:16:01,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1688 transitions. [2023-01-27 20:16:01,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:01,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1688 transitions. [2023-01-27 20:16:01,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.8) internal successors, (1688), 10 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:01,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:01,376 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:01,376 INFO L175 Difference]: Start difference. First operand has 558 places, 1092 transitions, 66523 flow. Second operand 10 states and 1688 transitions. [2023-01-27 20:16:01,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 1115 transitions, 69249 flow [2023-01-27 20:16:08,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 1115 transitions, 68883 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-01-27 20:16:08,741 INFO L231 Difference]: Finished difference. Result has 560 places, 1096 transitions, 66665 flow [2023-01-27 20:16:08,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=66157, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1092, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=970, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=66665, PETRI_PLACES=560, PETRI_TRANSITIONS=1096} [2023-01-27 20:16:08,742 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 537 predicate places. [2023-01-27 20:16:08,742 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 1096 transitions, 66665 flow [2023-01-27 20:16:08,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 165.04545454545453) internal successors, (3631), 22 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:08,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:08,743 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:08,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:08,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2023-01-27 20:16:08,950 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:08,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:08,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1525644689, now seen corresponding path program 76 times [2023-01-27 20:16:08,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:08,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089901179] [2023-01-27 20:16:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:08,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:16:09,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:09,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089901179] [2023-01-27 20:16:09,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089901179] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:09,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117046554] [2023-01-27 20:16:09,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:16:09,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:09,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:09,786 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:09,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-01-27 20:16:10,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:16:10,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:10,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:16:10,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:10,320 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:10,320 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 58 treesize of output 51 [2023-01-27 20:16:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:16:10,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:10,546 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 20:16:10,546 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 71 treesize of output 88 [2023-01-27 20:16:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:16:10,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117046554] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:10,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:10,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-01-27 20:16:10,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006575310] [2023-01-27 20:16:10,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:10,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 20:16:10,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:10,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 20:16:10,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:16:10,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:16:10,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 1096 transitions, 66665 flow. Second operand has 21 states, 21 states have (on average 165.04761904761904) internal successors, (3466), 21 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:10,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:10,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:16:10,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:15,902 INFO L130 PetriNetUnfolder]: 4251/7389 cut-off events. [2023-01-27 20:16:15,902 INFO L131 PetriNetUnfolder]: For 1111761/1111761 co-relation queries the response was YES. [2023-01-27 20:16:16,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166519 conditions, 7389 events. 4251/7389 cut-off events. For 1111761/1111761 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 53140 event pairs, 1511 based on Foata normal form. 4/7393 useless extension candidates. Maximal degree in co-relation 166281. Up to 6855 conditions per place. [2023-01-27 20:16:16,247 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 994 selfloop transitions, 128 changer transitions 2/1124 dead transitions. [2023-01-27 20:16:16,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 1124 transitions, 69431 flow [2023-01-27 20:16:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:16:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:16:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2349 transitions. [2023-01-27 20:16:16,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34312007011393514 [2023-01-27 20:16:16,262 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2349 transitions. [2023-01-27 20:16:16,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2349 transitions. [2023-01-27 20:16:16,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:16,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2349 transitions. [2023-01-27 20:16:16,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 167.78571428571428) internal successors, (2349), 14 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:16,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:16,267 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:16,267 INFO L175 Difference]: Start difference. First operand has 560 places, 1096 transitions, 66665 flow. Second operand 14 states and 2349 transitions. [2023-01-27 20:16:16,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 1124 transitions, 69431 flow [2023-01-27 20:16:22,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 1124 transitions, 68983 flow, removed 112 selfloop flow, removed 6 redundant places. [2023-01-27 20:16:23,025 INFO L231 Difference]: Finished difference. Result has 567 places, 1101 transitions, 66869 flow [2023-01-27 20:16:23,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=66141, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1094, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=66869, PETRI_PLACES=567, PETRI_TRANSITIONS=1101} [2023-01-27 20:16:23,027 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 544 predicate places. [2023-01-27 20:16:23,027 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1101 transitions, 66869 flow [2023-01-27 20:16:23,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.04761904761904) internal successors, (3466), 21 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:23,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:23,027 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:23,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:23,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:23,248 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:23,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:23,249 INFO L85 PathProgramCache]: Analyzing trace with hash 755323215, now seen corresponding path program 77 times [2023-01-27 20:16:23,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:23,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692048185] [2023-01-27 20:16:23,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:23,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:16:24,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:24,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692048185] [2023-01-27 20:16:24,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692048185] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:24,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727700264] [2023-01-27 20:16:24,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:16:24,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:24,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:24,207 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:24,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-01-27 20:16:24,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:16:24,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:24,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:16:24,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:24,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:24,831 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 58 treesize of output 51 [2023-01-27 20:16:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:16:24,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:25,162 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-01-27 20:16:25,163 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 63 treesize of output 67 [2023-01-27 20:16:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:16:25,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727700264] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:25,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:25,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 23 [2023-01-27 20:16:25,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530246210] [2023-01-27 20:16:25,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:25,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 20:16:25,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:25,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 20:16:25,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:16:25,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:16:25,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1101 transitions, 66869 flow. Second operand has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:25,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:25,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:16:25,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:30,545 INFO L130 PetriNetUnfolder]: 4273/7443 cut-off events. [2023-01-27 20:16:30,545 INFO L131 PetriNetUnfolder]: For 1115898/1115898 co-relation queries the response was YES. [2023-01-27 20:16:30,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167447 conditions, 7443 events. 4273/7443 cut-off events. For 1115898/1115898 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 53808 event pairs, 1155 based on Foata normal form. 20/7463 useless extension candidates. Maximal degree in co-relation 167209. Up to 5423 conditions per place. [2023-01-27 20:16:30,696 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 832 selfloop transitions, 298 changer transitions 0/1130 dead transitions. [2023-01-27 20:16:30,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 1130 transitions, 69665 flow [2023-01-27 20:16:30,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:16:30,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:16:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1695 transitions. [2023-01-27 20:16:30,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34662576687116564 [2023-01-27 20:16:30,698 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1695 transitions. [2023-01-27 20:16:30,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1695 transitions. [2023-01-27 20:16:30,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:30,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1695 transitions. [2023-01-27 20:16:30,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 169.5) internal successors, (1695), 10 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:30,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:30,724 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:30,724 INFO L175 Difference]: Start difference. First operand has 567 places, 1101 transitions, 66869 flow. Second operand 10 states and 1695 transitions. [2023-01-27 20:16:30,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 1130 transitions, 69665 flow [2023-01-27 20:16:37,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 1130 transitions, 69442 flow, removed 28 selfloop flow, removed 11 redundant places. [2023-01-27 20:16:37,531 INFO L231 Difference]: Finished difference. Result has 566 places, 1105 transitions, 67506 flow [2023-01-27 20:16:37,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=66646, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=67506, PETRI_PLACES=566, PETRI_TRANSITIONS=1105} [2023-01-27 20:16:37,533 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 543 predicate places. [2023-01-27 20:16:37,533 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 1105 transitions, 67506 flow [2023-01-27 20:16:37,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:37,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:37,533 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:37,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:37,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:37,740 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:37,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:37,741 INFO L85 PathProgramCache]: Analyzing trace with hash -995829491, now seen corresponding path program 78 times [2023-01-27 20:16:37,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:37,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997602185] [2023-01-27 20:16:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:37,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:16:38,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:38,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997602185] [2023-01-27 20:16:38,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997602185] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:38,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557315845] [2023-01-27 20:16:38,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:16:38,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:38,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:38,357 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:38,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-01-27 20:16:38,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 20:16:38,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:38,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:16:38,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:38,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:38,982 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 68 treesize of output 60 [2023-01-27 20:16:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:16:39,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:39,173 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-01-27 20:16:39,173 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 63 treesize of output 67 [2023-01-27 20:16:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:16:39,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557315845] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:39,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:39,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-01-27 20:16:39,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177815697] [2023-01-27 20:16:39,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:39,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 20:16:39,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:39,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 20:16:39,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:16:39,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:16:39,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 1105 transitions, 67506 flow. Second operand has 21 states, 21 states have (on average 165.04761904761904) internal successors, (3466), 21 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:39,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:39,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:16:39,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:44,562 INFO L130 PetriNetUnfolder]: 4275/7459 cut-off events. [2023-01-27 20:16:44,562 INFO L131 PetriNetUnfolder]: For 1134441/1134441 co-relation queries the response was YES. [2023-01-27 20:16:44,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168667 conditions, 7459 events. 4275/7459 cut-off events. For 1134441/1134441 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 54084 event pairs, 1127 based on Foata normal form. 4/7463 useless extension candidates. Maximal degree in co-relation 168427. Up to 5423 conditions per place. [2023-01-27 20:16:44,714 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 855 selfloop transitions, 286 changer transitions 11/1152 dead transitions. [2023-01-27 20:16:44,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 1152 transitions, 72029 flow [2023-01-27 20:16:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:16:44,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:16:44,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1519 transitions. [2023-01-27 20:16:44,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3451488298114065 [2023-01-27 20:16:44,715 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1519 transitions. [2023-01-27 20:16:44,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1519 transitions. [2023-01-27 20:16:44,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:44,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1519 transitions. [2023-01-27 20:16:44,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.77777777777777) internal successors, (1519), 9 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:44,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:44,718 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:44,718 INFO L175 Difference]: Start difference. First operand has 566 places, 1105 transitions, 67506 flow. Second operand 9 states and 1519 transitions. [2023-01-27 20:16:44,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 1152 transitions, 72029 flow [2023-01-27 20:16:51,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 1152 transitions, 71541 flow, removed 60 selfloop flow, removed 7 redundant places. [2023-01-27 20:16:51,419 INFO L231 Difference]: Finished difference. Result has 570 places, 1103 transitions, 67526 flow [2023-01-27 20:16:51,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=67034, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=67526, PETRI_PLACES=570, PETRI_TRANSITIONS=1103} [2023-01-27 20:16:51,421 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 547 predicate places. [2023-01-27 20:16:51,421 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 1103 transitions, 67526 flow [2023-01-27 20:16:51,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.04761904761904) internal successors, (3466), 21 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:51,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:51,421 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:51,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:51,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2023-01-27 20:16:51,629 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:51,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash 243108279, now seen corresponding path program 79 times [2023-01-27 20:16:51,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:51,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971628757] [2023-01-27 20:16:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:51,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:16:52,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:52,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971628757] [2023-01-27 20:16:52,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971628757] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:52,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386558754] [2023-01-27 20:16:52,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:16:52,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:52,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:52,349 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:52,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-01-27 20:16:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:52,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:16:52,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:52,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:52,940 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 68 treesize of output 60 [2023-01-27 20:16:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:16:52,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:53,111 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-01-27 20:16:53,111 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 63 treesize of output 67 [2023-01-27 20:16:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:16:53,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386558754] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:53,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:53,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:16:53,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94860317] [2023-01-27 20:16:53,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:53,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:16:53,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:53,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:16:53,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:16:53,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:16:53,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 1103 transitions, 67526 flow. Second operand has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:53,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:53,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:16:53,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:58,246 INFO L130 PetriNetUnfolder]: 4267/7443 cut-off events. [2023-01-27 20:16:58,246 INFO L131 PetriNetUnfolder]: For 1108338/1108338 co-relation queries the response was YES. [2023-01-27 20:16:58,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168412 conditions, 7443 events. 4267/7443 cut-off events. For 1108338/1108338 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 53932 event pairs, 1155 based on Foata normal form. 4/7447 useless extension candidates. Maximal degree in co-relation 168169. Up to 5423 conditions per place. [2023-01-27 20:16:58,401 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 827 selfloop transitions, 286 changer transitions 9/1122 dead transitions. [2023-01-27 20:16:58,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 1122 transitions, 70009 flow [2023-01-27 20:16:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:16:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:16:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1518 transitions. [2023-01-27 20:16:58,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3449216087252897 [2023-01-27 20:16:58,403 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1518 transitions. [2023-01-27 20:16:58,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1518 transitions. [2023-01-27 20:16:58,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:58,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1518 transitions. [2023-01-27 20:16:58,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.66666666666666) internal successors, (1518), 9 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:58,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:58,406 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:58,406 INFO L175 Difference]: Start difference. First operand has 570 places, 1103 transitions, 67526 flow. Second operand 9 states and 1518 transitions. [2023-01-27 20:16:58,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 1122 transitions, 70009 flow [2023-01-27 20:17:05,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 1122 transitions, 69427 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-01-27 20:17:05,594 INFO L231 Difference]: Finished difference. Result has 569 places, 1098 transitions, 67299 flow [2023-01-27 20:17:05,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=66948, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=817, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=67299, PETRI_PLACES=569, PETRI_TRANSITIONS=1098} [2023-01-27 20:17:05,595 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 546 predicate places. [2023-01-27 20:17:05,595 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 1098 transitions, 67299 flow [2023-01-27 20:17:05,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:05,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:17:05,596 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:17:05,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-01-27 20:17:05,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:05,802 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:17:05,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:17:05,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1827791477, now seen corresponding path program 80 times [2023-01-27 20:17:05,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:17:05,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979242354] [2023-01-27 20:17:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:17:05,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:17:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:17:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:17:06,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:17:06,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979242354] [2023-01-27 20:17:06,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979242354] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:17:06,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314715938] [2023-01-27 20:17:06,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:17:06,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:06,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:17:06,344 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:17:06,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-01-27 20:17:06,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:17:06,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:17:06,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:17:06,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:17:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:17:06,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:17:07,109 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-01-27 20:17:07,110 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 63 treesize of output 67 [2023-01-27 20:17:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:17:07,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314715938] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:17:07,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:17:07,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-27 20:17:07,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133269335] [2023-01-27 20:17:07,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:17:07,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 20:17:07,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:17:07,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 20:17:07,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:17:07,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:17:07,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 1098 transitions, 67299 flow. Second operand has 22 states, 22 states have (on average 165.0) internal successors, (3630), 22 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:07,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:17:07,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:17:07,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:17:12,374 INFO L130 PetriNetUnfolder]: 4259/7425 cut-off events. [2023-01-27 20:17:12,374 INFO L131 PetriNetUnfolder]: For 1109536/1109536 co-relation queries the response was YES. [2023-01-27 20:17:12,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168034 conditions, 7425 events. 4259/7425 cut-off events. For 1109536/1109536 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 53666 event pairs, 1155 based on Foata normal form. 4/7429 useless extension candidates. Maximal degree in co-relation 167793. Up to 5423 conditions per place. [2023-01-27 20:17:12,535 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 824 selfloop transitions, 284 changer transitions 6/1114 dead transitions. [2023-01-27 20:17:12,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 1114 transitions, 69611 flow [2023-01-27 20:17:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:17:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:17:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1517 transitions. [2023-01-27 20:17:12,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34469438763917293 [2023-01-27 20:17:12,536 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1517 transitions. [2023-01-27 20:17:12,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1517 transitions. [2023-01-27 20:17:12,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:17:12,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1517 transitions. [2023-01-27 20:17:12,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.55555555555554) internal successors, (1517), 9 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:12,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:12,539 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:12,539 INFO L175 Difference]: Start difference. First operand has 569 places, 1098 transitions, 67299 flow. Second operand 9 states and 1517 transitions. [2023-01-27 20:17:12,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 1114 transitions, 69611 flow [2023-01-27 20:17:19,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 1114 transitions, 69035 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-01-27 20:17:19,333 INFO L231 Difference]: Finished difference. Result has 568 places, 1094 transitions, 67132 flow [2023-01-27 20:17:19,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=66723, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1098, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=67132, PETRI_PLACES=568, PETRI_TRANSITIONS=1094} [2023-01-27 20:17:19,334 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 545 predicate places. [2023-01-27 20:17:19,334 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 1094 transitions, 67132 flow [2023-01-27 20:17:19,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 165.0) internal successors, (3630), 22 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:19,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:17:19,335 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:17:19,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2023-01-27 20:17:19,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:19,535 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:17:19,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:17:19,536 INFO L85 PathProgramCache]: Analyzing trace with hash -2102567933, now seen corresponding path program 81 times [2023-01-27 20:17:19,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:17:19,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797065498] [2023-01-27 20:17:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:17:19,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:17:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:17:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:17:20,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:17:20,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797065498] [2023-01-27 20:17:20,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797065498] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:17:20,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910458370] [2023-01-27 20:17:20,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:17:20,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:20,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:17:20,197 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:17:20,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-01-27 20:17:20,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:17:20,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:17:20,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:17:20,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:17:20,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:17:20,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 35 [2023-01-27 20:17:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:17:20,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:17:21,113 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-01-27 20:17:21,114 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 63 treesize of output 67 [2023-01-27 20:17:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:17:21,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910458370] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:17:21,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:17:21,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:17:21,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175230615] [2023-01-27 20:17:21,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:17:21,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:17:21,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:17:21,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:17:21,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:17:21,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:17:21,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 1094 transitions, 67132 flow. Second operand has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:21,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:17:21,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:17:21,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:17:26,078 INFO L130 PetriNetUnfolder]: 4241/7375 cut-off events. [2023-01-27 20:17:26,078 INFO L131 PetriNetUnfolder]: For 1112588/1112588 co-relation queries the response was YES. [2023-01-27 20:17:26,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166984 conditions, 7375 events. 4241/7375 cut-off events. For 1112588/1112588 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 53140 event pairs, 1155 based on Foata normal form. 4/7379 useless extension candidates. Maximal degree in co-relation 166743. Up to 5423 conditions per place. [2023-01-27 20:17:26,227 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 824 selfloop transitions, 290 changer transitions 2/1116 dead transitions. [2023-01-27 20:17:26,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 1116 transitions, 69463 flow [2023-01-27 20:17:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 20:17:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 20:17:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2019 transitions. [2023-01-27 20:17:26,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3440695296523517 [2023-01-27 20:17:26,229 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2019 transitions. [2023-01-27 20:17:26,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2019 transitions. [2023-01-27 20:17:26,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:17:26,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2019 transitions. [2023-01-27 20:17:26,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 168.25) internal successors, (2019), 12 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:26,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:26,351 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:26,351 INFO L175 Difference]: Start difference. First operand has 568 places, 1094 transitions, 67132 flow. Second operand 12 states and 2019 transitions. [2023-01-27 20:17:26,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 1116 transitions, 69463 flow [2023-01-27 20:17:32,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 1116 transitions, 68904 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-01-27 20:17:32,543 INFO L231 Difference]: Finished difference. Result has 573 places, 1093 transitions, 67144 flow [2023-01-27 20:17:32,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=66381, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1092, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=802, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=67144, PETRI_PLACES=573, PETRI_TRANSITIONS=1093} [2023-01-27 20:17:32,544 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 550 predicate places. [2023-01-27 20:17:32,544 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 1093 transitions, 67144 flow [2023-01-27 20:17:32,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:32,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:17:32,544 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:17:32,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2023-01-27 20:17:32,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-01-27 20:17:32,751 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:17:32,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:17:32,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1471225305, now seen corresponding path program 82 times [2023-01-27 20:17:32,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:17:32,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40436610] [2023-01-27 20:17:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:17:32,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:17:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:17:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:17:33,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:17:33,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40436610] [2023-01-27 20:17:33,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40436610] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:17:33,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025797232] [2023-01-27 20:17:33,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:17:33,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:33,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:17:33,273 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:17:33,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-01-27 20:17:33,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:17:33,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:17:33,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:17:33,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:17:33,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:17:33,796 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 58 treesize of output 51 [2023-01-27 20:17:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:17:33,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:17:34,044 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:17:34,044 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 20 treesize of output 4 [2023-01-27 20:17:34,077 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:17:34,078 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 40 treesize of output 56 [2023-01-27 20:17:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:17:34,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025797232] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:17:34,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:17:34,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 21 [2023-01-27 20:17:34,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464646509] [2023-01-27 20:17:34,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:17:34,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 20:17:34,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:17:34,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 20:17:34,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:17:34,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:17:34,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 1093 transitions, 67144 flow. Second operand has 21 states, 21 states have (on average 165.0952380952381) internal successors, (3467), 21 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:34,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:17:34,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:17:34,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:17:39,033 INFO L130 PetriNetUnfolder]: 4263/7429 cut-off events. [2023-01-27 20:17:39,034 INFO L131 PetriNetUnfolder]: For 1118929/1118929 co-relation queries the response was YES. [2023-01-27 20:17:39,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168395 conditions, 7429 events. 4263/7429 cut-off events. For 1118929/1118929 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 53663 event pairs, 1517 based on Foata normal form. 20/7449 useless extension candidates. Maximal degree in co-relation 168153. Up to 6881 conditions per place. [2023-01-27 20:17:39,190 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1000 selfloop transitions, 115 changer transitions 1/1116 dead transitions. [2023-01-27 20:17:39,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1116 transitions, 69900 flow [2023-01-27 20:17:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:17:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:17:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1686 transitions. [2023-01-27 20:17:39,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34478527607361964 [2023-01-27 20:17:39,192 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1686 transitions. [2023-01-27 20:17:39,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1686 transitions. [2023-01-27 20:17:39,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:17:39,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1686 transitions. [2023-01-27 20:17:39,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.6) internal successors, (1686), 10 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:39,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:39,195 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:39,195 INFO L175 Difference]: Start difference. First operand has 573 places, 1093 transitions, 67144 flow. Second operand 10 states and 1686 transitions. [2023-01-27 20:17:39,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1116 transitions, 69900 flow [2023-01-27 20:17:45,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1116 transitions, 69276 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-01-27 20:17:45,912 INFO L231 Difference]: Finished difference. Result has 572 places, 1097 transitions, 67034 flow [2023-01-27 20:17:45,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=66528, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1093, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=978, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=67034, PETRI_PLACES=572, PETRI_TRANSITIONS=1097} [2023-01-27 20:17:45,913 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 549 predicate places. [2023-01-27 20:17:45,913 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 1097 transitions, 67034 flow [2023-01-27 20:17:45,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.0952380952381) internal successors, (3467), 21 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:45,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:17:45,914 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:17:45,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2023-01-27 20:17:46,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:46,118 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:17:46,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:17:46,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2112021603, now seen corresponding path program 83 times [2023-01-27 20:17:46,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:17:46,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613972188] [2023-01-27 20:17:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:17:46,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:17:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:17:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:17:46,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:17:46,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613972188] [2023-01-27 20:17:46,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613972188] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:17:46,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294744265] [2023-01-27 20:17:46,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:17:46,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:46,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:17:46,625 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:17:46,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-01-27 20:17:47,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:17:47,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:17:47,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-27 20:17:47,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:17:47,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:17:47,122 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 46 treesize of output 34 [2023-01-27 20:17:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:17:47,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:17:47,362 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:17:47,362 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 40 treesize of output 56 [2023-01-27 20:17:47,377 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:17:47,377 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 20 treesize of output 4 [2023-01-27 20:17:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:17:47,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294744265] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:17:47,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:17:47,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2023-01-27 20:17:47,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926800192] [2023-01-27 20:17:47,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:17:47,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 20:17:47,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:17:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 20:17:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:17:47,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:17:47,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 1097 transitions, 67034 flow. Second operand has 24 states, 24 states have (on average 165.16666666666666) internal successors, (3964), 24 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:47,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:17:47,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:17:47,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:17:52,334 INFO L130 PetriNetUnfolder]: 4259/7425 cut-off events. [2023-01-27 20:17:52,334 INFO L131 PetriNetUnfolder]: For 1117683/1117683 co-relation queries the response was YES. [2023-01-27 20:17:52,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167644 conditions, 7425 events. 4259/7425 cut-off events. For 1117683/1117683 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 53734 event pairs, 1525 based on Foata normal form. 4/7429 useless extension candidates. Maximal degree in co-relation 167401. Up to 6957 conditions per place. [2023-01-27 20:17:52,496 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1004 selfloop transitions, 108 changer transitions 0/1112 dead transitions. [2023-01-27 20:17:52,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1112 transitions, 69734 flow [2023-01-27 20:17:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:17:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:17:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1513 transitions. [2023-01-27 20:17:52,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34378550329470575 [2023-01-27 20:17:52,498 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1513 transitions. [2023-01-27 20:17:52,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1513 transitions. [2023-01-27 20:17:52,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:17:52,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1513 transitions. [2023-01-27 20:17:52,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.11111111111111) internal successors, (1513), 9 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:52,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:52,501 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:52,501 INFO L175 Difference]: Start difference. First operand has 572 places, 1097 transitions, 67034 flow. Second operand 9 states and 1513 transitions. [2023-01-27 20:17:52,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1112 transitions, 69734 flow [2023-01-27 20:17:59,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 1112 transitions, 69392 flow, removed 60 selfloop flow, removed 8 redundant places. [2023-01-27 20:17:59,440 INFO L231 Difference]: Finished difference. Result has 574 places, 1102 transitions, 67355 flow [2023-01-27 20:17:59,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=66692, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1097, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=993, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=67355, PETRI_PLACES=574, PETRI_TRANSITIONS=1102} [2023-01-27 20:17:59,441 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 551 predicate places. [2023-01-27 20:17:59,441 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 1102 transitions, 67355 flow [2023-01-27 20:17:59,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 165.16666666666666) internal successors, (3964), 24 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:59,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:17:59,442 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:17:59,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2023-01-27 20:17:59,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:59,649 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:17:59,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:17:59,649 INFO L85 PathProgramCache]: Analyzing trace with hash -91875793, now seen corresponding path program 84 times [2023-01-27 20:17:59,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:17:59,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465508736] [2023-01-27 20:17:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:17:59,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:17:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:18:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:00,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:18:00,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465508736] [2023-01-27 20:18:00,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465508736] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:18:00,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074946657] [2023-01-27 20:18:00,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:18:00,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:18:00,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:18:00,139 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:18:00,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-01-27 20:18:00,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 20:18:00,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:18:00,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-27 20:18:00,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:18:00,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:18:00,712 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 65 treesize of output 41 [2023-01-27 20:18:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:00,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:18:00,984 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:18:00,984 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 20 treesize of output 4 [2023-01-27 20:18:01,017 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:18:01,017 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 40 treesize of output 56 [2023-01-27 20:18:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:01,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074946657] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:18:01,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:18:01,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2023-01-27 20:18:01,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571809197] [2023-01-27 20:18:01,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:18:01,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 20:18:01,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:18:01,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 20:18:01,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:18:01,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:18:01,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 1102 transitions, 67355 flow. Second operand has 24 states, 24 states have (on average 164.91666666666666) internal successors, (3958), 24 states have internal predecessors, (3958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:01,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:18:01,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:18:01,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:18:07,152 INFO L130 PetriNetUnfolder]: 4291/7509 cut-off events. [2023-01-27 20:18:07,153 INFO L131 PetriNetUnfolder]: For 1146299/1146299 co-relation queries the response was YES. [2023-01-27 20:18:07,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168468 conditions, 7509 events. 4291/7509 cut-off events. For 1146299/1146299 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 54547 event pairs, 602 based on Foata normal form. 44/7553 useless extension candidates. Maximal degree in co-relation 168223. Up to 3713 conditions per place. [2023-01-27 20:18:07,307 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 443 selfloop transitions, 756 changer transitions 3/1202 dead transitions. [2023-01-27 20:18:07,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 1202 transitions, 72016 flow [2023-01-27 20:18:07,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 20:18:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 20:18:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4363 transitions. [2023-01-27 20:18:07,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.343165014944156 [2023-01-27 20:18:07,310 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4363 transitions. [2023-01-27 20:18:07,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4363 transitions. [2023-01-27 20:18:07,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:18:07,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4363 transitions. [2023-01-27 20:18:07,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 167.80769230769232) internal successors, (4363), 26 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:07,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:07,319 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:07,319 INFO L175 Difference]: Start difference. First operand has 574 places, 1102 transitions, 67355 flow. Second operand 26 states and 4363 transitions. [2023-01-27 20:18:07,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 1202 transitions, 72016 flow [2023-01-27 20:18:14,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 1202 transitions, 71664 flow, removed 79 selfloop flow, removed 6 redundant places. [2023-01-27 20:18:14,633 INFO L231 Difference]: Finished difference. Result has 600 places, 1127 transitions, 70159 flow [2023-01-27 20:18:14,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=66647, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1098, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=730, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=70159, PETRI_PLACES=600, PETRI_TRANSITIONS=1127} [2023-01-27 20:18:14,634 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 577 predicate places. [2023-01-27 20:18:14,634 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 1127 transitions, 70159 flow [2023-01-27 20:18:14,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 164.91666666666666) internal successors, (3958), 24 states have internal predecessors, (3958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:14,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:18:14,635 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:18:14,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2023-01-27 20:18:14,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:18:14,858 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:18:14,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:18:14,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1583288657, now seen corresponding path program 85 times [2023-01-27 20:18:14,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:18:14,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777342827] [2023-01-27 20:18:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:18:14,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:18:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:18:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:15,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:18:15,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777342827] [2023-01-27 20:18:15,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777342827] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:18:15,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318980110] [2023-01-27 20:18:15,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:18:15,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:18:15,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:18:15,316 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:18:15,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-01-27 20:18:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:18:15,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:18:15,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:18:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:15,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:18:15,989 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:18:15,989 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 20 treesize of output 4 [2023-01-27 20:18:16,024 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:18:16,025 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 40 treesize of output 56 [2023-01-27 20:18:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:16,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318980110] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:18:16,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:18:16,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:18:16,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911810790] [2023-01-27 20:18:16,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:18:16,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:18:16,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:18:16,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:18:16,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:18:16,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:18:16,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 1127 transitions, 70159 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:16,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:18:16,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:18:16,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:18:21,155 INFO L130 PetriNetUnfolder]: 4283/7493 cut-off events. [2023-01-27 20:18:21,155 INFO L131 PetriNetUnfolder]: For 1163193/1163193 co-relation queries the response was YES. [2023-01-27 20:18:21,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172007 conditions, 7493 events. 4283/7493 cut-off events. For 1163193/1163193 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 54354 event pairs, 1543 based on Foata normal form. 4/7497 useless extension candidates. Maximal degree in co-relation 171755. Up to 7037 conditions per place. [2023-01-27 20:18:21,320 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1033 selfloop transitions, 97 changer transitions 8/1138 dead transitions. [2023-01-27 20:18:21,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 1138 transitions, 72497 flow [2023-01-27 20:18:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:18:21,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:18:21,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1509 transitions. [2023-01-27 20:18:21,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3428766189502386 [2023-01-27 20:18:21,322 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1509 transitions. [2023-01-27 20:18:21,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1509 transitions. [2023-01-27 20:18:21,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:18:21,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1509 transitions. [2023-01-27 20:18:21,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.66666666666666) internal successors, (1509), 9 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:21,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:21,325 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:21,325 INFO L175 Difference]: Start difference. First operand has 600 places, 1127 transitions, 70159 flow. Second operand 9 states and 1509 transitions. [2023-01-27 20:18:21,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 1138 transitions, 72497 flow [2023-01-27 20:18:29,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 1138 transitions, 70905 flow, removed 388 selfloop flow, removed 11 redundant places. [2023-01-27 20:18:29,197 INFO L231 Difference]: Finished difference. Result has 596 places, 1122 transitions, 68488 flow [2023-01-27 20:18:29,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=68567, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1030, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=68488, PETRI_PLACES=596, PETRI_TRANSITIONS=1122} [2023-01-27 20:18:29,198 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 573 predicate places. [2023-01-27 20:18:29,199 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 1122 transitions, 68488 flow [2023-01-27 20:18:29,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:29,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:18:29,199 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:18:29,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2023-01-27 20:18:29,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2023-01-27 20:18:29,405 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:18:29,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:18:29,406 INFO L85 PathProgramCache]: Analyzing trace with hash -618234221, now seen corresponding path program 86 times [2023-01-27 20:18:29,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:18:29,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457468922] [2023-01-27 20:18:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:18:29,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:18:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:18:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:29,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:18:29,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457468922] [2023-01-27 20:18:29,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457468922] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:18:29,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033974986] [2023-01-27 20:18:29,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:18:29,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:18:29,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:18:29,953 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:18:29,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-01-27 20:18:30,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:18:30,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:18:30,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:18:30,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:18:30,513 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:18:30,514 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 36 treesize of output 12 [2023-01-27 20:18:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:30,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:18:30,654 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:18:30,655 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 20 treesize of output 4 [2023-01-27 20:18:30,689 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:18:30,689 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 40 treesize of output 56 [2023-01-27 20:18:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:30,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033974986] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:18:30,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:18:30,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-01-27 20:18:30,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626611740] [2023-01-27 20:18:30,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:18:30,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 20:18:30,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:18:30,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 20:18:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-01-27 20:18:30,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:18:30,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 1122 transitions, 68488 flow. Second operand has 18 states, 18 states have (on average 165.38888888888889) internal successors, (2977), 18 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:30,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:18:30,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:18:30,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:18:35,761 INFO L130 PetriNetUnfolder]: 4297/7489 cut-off events. [2023-01-27 20:18:35,761 INFO L131 PetriNetUnfolder]: For 1124528/1124528 co-relation queries the response was YES. [2023-01-27 20:18:35,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168739 conditions, 7489 events. 4297/7489 cut-off events. For 1124528/1124528 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 54146 event pairs, 1517 based on Foata normal form. 12/7501 useless extension candidates. Maximal degree in co-relation 168487. Up to 6965 conditions per place. [2023-01-27 20:18:35,918 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1039 selfloop transitions, 111 changer transitions 0/1150 dead transitions. [2023-01-27 20:18:35,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 1150 transitions, 71236 flow [2023-01-27 20:18:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:18:35,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:18:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1685 transitions. [2023-01-27 20:18:35,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445807770961145 [2023-01-27 20:18:35,919 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1685 transitions. [2023-01-27 20:18:35,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1685 transitions. [2023-01-27 20:18:35,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:18:35,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1685 transitions. [2023-01-27 20:18:35,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.5) internal successors, (1685), 10 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:35,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:35,922 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:35,922 INFO L175 Difference]: Start difference. First operand has 596 places, 1122 transitions, 68488 flow. Second operand 10 states and 1685 transitions. [2023-01-27 20:18:35,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 1150 transitions, 71236 flow [2023-01-27 20:18:43,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 1150 transitions, 71026 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-01-27 20:18:43,186 INFO L231 Difference]: Finished difference. Result has 592 places, 1128 transitions, 68532 flow [2023-01-27 20:18:43,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=68009, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1007, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=68532, PETRI_PLACES=592, PETRI_TRANSITIONS=1128} [2023-01-27 20:18:43,187 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 569 predicate places. [2023-01-27 20:18:43,187 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 1128 transitions, 68532 flow [2023-01-27 20:18:43,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 165.38888888888889) internal successors, (2977), 18 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:43,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:18:43,187 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:18:43,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2023-01-27 20:18:43,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:18:43,394 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:18:43,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:18:43,394 INFO L85 PathProgramCache]: Analyzing trace with hash 334329809, now seen corresponding path program 87 times [2023-01-27 20:18:43,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:18:43,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9796289] [2023-01-27 20:18:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:18:43,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:18:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:18:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:43,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:18:43,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9796289] [2023-01-27 20:18:43,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9796289] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:18:43,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418425315] [2023-01-27 20:18:43,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:18:43,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:18:43,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:18:43,857 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:18:43,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-01-27 20:18:44,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 20:18:44,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:18:44,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:18:44,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:18:44,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:18:44,572 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 58 treesize of output 51 [2023-01-27 20:18:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:44,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:18:44,763 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:18:44,763 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 20 treesize of output 4 [2023-01-27 20:18:44,796 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:18:44,797 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 40 treesize of output 56 [2023-01-27 20:18:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:44,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418425315] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:18:44,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:18:44,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-27 20:18:44,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943369914] [2023-01-27 20:18:44,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:18:44,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:18:44,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:18:44,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:18:44,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:18:44,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-27 20:18:44,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1128 transitions, 68532 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:44,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:18:44,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-27 20:18:44,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:18:50,379 INFO L130 PetriNetUnfolder]: 4307/7491 cut-off events. [2023-01-27 20:18:50,379 INFO L131 PetriNetUnfolder]: For 1123814/1123814 co-relation queries the response was YES. [2023-01-27 20:18:50,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168715 conditions, 7491 events. 4307/7491 cut-off events. For 1123814/1123814 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 53938 event pairs, 1515 based on Foata normal form. 4/7495 useless extension candidates. Maximal degree in co-relation 168463. Up to 6983 conditions per place. [2023-01-27 20:18:50,530 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1036 selfloop transitions, 117 changer transitions 2/1155 dead transitions. [2023-01-27 20:18:50,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 1155 transitions, 71269 flow [2023-01-27 20:18:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:18:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:18:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2346 transitions. [2023-01-27 20:18:50,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3426818580192813 [2023-01-27 20:18:50,531 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2346 transitions. [2023-01-27 20:18:50,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2346 transitions. [2023-01-27 20:18:50,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:18:50,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2346 transitions. [2023-01-27 20:18:50,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 167.57142857142858) internal successors, (2346), 14 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:50,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:50,536 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:50,536 INFO L175 Difference]: Start difference. First operand has 592 places, 1128 transitions, 68532 flow. Second operand 14 states and 2346 transitions. [2023-01-27 20:18:50,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 1155 transitions, 71269 flow [2023-01-27 20:18:57,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 1155 transitions, 71066 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-27 20:18:57,526 INFO L231 Difference]: Finished difference. Result has 597 places, 1133 transitions, 68867 flow [2023-01-27 20:18:57,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=68139, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1015, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=68867, PETRI_PLACES=597, PETRI_TRANSITIONS=1133} [2023-01-27 20:18:57,528 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 574 predicate places. [2023-01-27 20:18:57,528 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 1133 transitions, 68867 flow [2023-01-27 20:18:57,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:57,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:18:57,528 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:18:57,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2023-01-27 20:18:57,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:18:57,735 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:18:57,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:18:57,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1032207603, now seen corresponding path program 88 times [2023-01-27 20:18:57,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:18:57,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428397414] [2023-01-27 20:18:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:18:57,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:18:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:18:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:58,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:18:58,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428397414] [2023-01-27 20:18:58,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428397414] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:18:58,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044623182] [2023-01-27 20:18:58,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:18:58,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:18:58,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:18:58,289 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:18:58,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2023-01-27 20:18:58,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:18:58,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:18:58,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-27 20:18:58,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:18:58,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:18:58,921 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 14 treesize of output 16 [2023-01-27 20:18:59,046 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:18:59,047 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 55 treesize of output 23 [2023-01-27 20:18:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:59,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:18:59,196 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6553 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6553))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))) (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)))))) is different from false [2023-01-27 20:18:59,239 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-27 20:18:59,239 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 114 treesize of output 127 [2023-01-27 20:18:59,268 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:18:59,269 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 74 treesize of output 88 [2023-01-27 20:18:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:18:59,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044623182] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:18:59,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:18:59,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-01-27 20:18:59,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611658835] [2023-01-27 20:18:59,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:18:59,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 20:18:59,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:18:59,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 20:18:59,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=604, Unknown=1, NotChecked=50, Total=756 [2023-01-27 20:18:59,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-01-27 20:18:59,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 1133 transitions, 68867 flow. Second operand has 28 states, 28 states have (on average 160.89285714285714) internal successors, (4505), 28 states have internal predecessors, (4505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:59,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:18:59,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-01-27 20:18:59,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:19:05,689 INFO L130 PetriNetUnfolder]: 4597/8011 cut-off events. [2023-01-27 20:19:05,689 INFO L131 PetriNetUnfolder]: For 1166078/1166078 co-relation queries the response was YES. [2023-01-27 20:19:05,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179699 conditions, 8011 events. 4597/8011 cut-off events. For 1166078/1166078 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 58337 event pairs, 339 based on Foata normal form. 24/8035 useless extension candidates. Maximal degree in co-relation 179447. Up to 3094 conditions per place. [2023-01-27 20:19:05,860 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 607 selfloop transitions, 638 changer transitions 0/1245 dead transitions. [2023-01-27 20:19:05,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 1245 transitions, 75780 flow [2023-01-27 20:19:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:19:05,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:19:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2474 transitions. [2023-01-27 20:19:05,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3372869802317655 [2023-01-27 20:19:05,862 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2474 transitions. [2023-01-27 20:19:05,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2474 transitions. [2023-01-27 20:19:05,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:19:05,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2474 transitions. [2023-01-27 20:19:05,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 164.93333333333334) internal successors, (2474), 15 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:05,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:05,867 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:05,867 INFO L175 Difference]: Start difference. First operand has 597 places, 1133 transitions, 68867 flow. Second operand 15 states and 2474 transitions. [2023-01-27 20:19:05,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 1245 transitions, 75780 flow [2023-01-27 20:19:14,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 1245 transitions, 75553 flow, removed 36 selfloop flow, removed 10 redundant places. [2023-01-27 20:19:14,925 INFO L231 Difference]: Finished difference. Result has 602 places, 1151 transitions, 71127 flow [2023-01-27 20:19:14,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=68648, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=620, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=71127, PETRI_PLACES=602, PETRI_TRANSITIONS=1151} [2023-01-27 20:19:14,926 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 579 predicate places. [2023-01-27 20:19:14,926 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 1151 transitions, 71127 flow [2023-01-27 20:19:14,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.89285714285714) internal successors, (4505), 28 states have internal predecessors, (4505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:14,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:19:14,927 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:19:14,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2023-01-27 20:19:15,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:19:15,139 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:19:15,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:19:15,139 INFO L85 PathProgramCache]: Analyzing trace with hash 141331341, now seen corresponding path program 89 times [2023-01-27 20:19:15,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:19:15,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167526212] [2023-01-27 20:19:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:19:15,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:19:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:19:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:19:15,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:19:15,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167526212] [2023-01-27 20:19:15,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167526212] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:19:15,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469540933] [2023-01-27 20:19:15,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:19:15,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:19:15,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:19:15,832 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:19:15,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2023-01-27 20:19:16,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:19:16,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:19:16,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 71 conjunts are in the unsatisfiable core [2023-01-27 20:19:16,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:19:16,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:19:16,304 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2023-01-27 20:19:16,305 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 1 case distinctions, treesize of input 12 treesize of output 16 [2023-01-27 20:19:16,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:19:16,378 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-01-27 20:19:16,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-01-27 20:19:16,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:19:16,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 23 [2023-01-27 20:19:16,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-01-27 20:19:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:19:16,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:19:17,027 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-27 20:19:17,027 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 86 treesize of output 107 [2023-01-27 20:19:17,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:19:17,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-01-27 20:19:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:19:17,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469540933] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:19:17,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:19:17,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-01-27 20:19:17,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169187240] [2023-01-27 20:19:17,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:19:17,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 20:19:17,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:19:17,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 20:19:17,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=800, Unknown=3, NotChecked=0, Total=930 [2023-01-27 20:19:17,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 489 [2023-01-27 20:19:17,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 1151 transitions, 71127 flow. Second operand has 31 states, 31 states have (on average 152.83870967741936) internal successors, (4738), 31 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:17,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:19:17,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 489 [2023-01-27 20:19:17,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:19:23,303 INFO L130 PetriNetUnfolder]: 4657/8115 cut-off events. [2023-01-27 20:19:23,303 INFO L131 PetriNetUnfolder]: For 1236329/1236329 co-relation queries the response was YES. [2023-01-27 20:19:23,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183973 conditions, 8115 events. 4657/8115 cut-off events. For 1236329/1236329 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 59231 event pairs, 233 based on Foata normal form. 28/8143 useless extension candidates. Maximal degree in co-relation 183715. Up to 3632 conditions per place. [2023-01-27 20:19:23,461 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 549 selfloop transitions, 670 changer transitions 1/1220 dead transitions. [2023-01-27 20:19:23,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1220 transitions, 75954 flow [2023-01-27 20:19:23,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:19:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:19:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2341 transitions. [2023-01-27 20:19:23,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3191547375596455 [2023-01-27 20:19:23,463 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2341 transitions. [2023-01-27 20:19:23,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2341 transitions. [2023-01-27 20:19:23,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:19:23,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2341 transitions. [2023-01-27 20:19:23,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 156.06666666666666) internal successors, (2341), 15 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:23,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:23,467 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:23,467 INFO L175 Difference]: Start difference. First operand has 602 places, 1151 transitions, 71127 flow. Second operand 15 states and 2341 transitions. [2023-01-27 20:19:23,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1220 transitions, 75954 flow [2023-01-27 20:19:32,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 1220 transitions, 75316 flow, removed 161 selfloop flow, removed 10 redundant places. [2023-01-27 20:19:32,778 INFO L231 Difference]: Finished difference. Result has 608 places, 1163 transitions, 72538 flow [2023-01-27 20:19:32,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=70517, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=658, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=72538, PETRI_PLACES=608, PETRI_TRANSITIONS=1163} [2023-01-27 20:19:32,779 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 585 predicate places. [2023-01-27 20:19:32,779 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1163 transitions, 72538 flow [2023-01-27 20:19:32,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 152.83870967741936) internal successors, (4738), 31 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:32,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:19:32,779 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:19:32,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2023-01-27 20:19:32,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:19:32,986 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:19:32,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:19:32,986 INFO L85 PathProgramCache]: Analyzing trace with hash -931089555, now seen corresponding path program 90 times [2023-01-27 20:19:32,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:19:32,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894509235] [2023-01-27 20:19:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:19:32,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:19:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:19:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 20:19:34,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:19:34,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894509235] [2023-01-27 20:19:34,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894509235] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:19:34,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795524418] [2023-01-27 20:19:34,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:19:34,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:19:34,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:19:34,013 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:19:34,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2023-01-27 20:19:34,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 20:19:34,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:19:34,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-27 20:19:34,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:19:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:19:34,571 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 14 treesize of output 16 [2023-01-27 20:19:34,729 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:19:34,729 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 55 treesize of output 23 [2023-01-27 20:19:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:19:34,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:19:34,948 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6700 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6700))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)) (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)))))) is different from false [2023-01-27 20:19:34,989 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-27 20:19:34,989 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 114 treesize of output 127 [2023-01-27 20:19:35,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:19:35,005 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 74 treesize of output 88 [2023-01-27 20:19:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:19:35,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795524418] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:19:35,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:19:35,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 10] total 33 [2023-01-27 20:19:35,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661932028] [2023-01-27 20:19:35,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:19:35,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-27 20:19:35,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:19:35,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-27 20:19:35,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=923, Unknown=1, NotChecked=62, Total=1122 [2023-01-27 20:19:35,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 489 [2023-01-27 20:19:35,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1163 transitions, 72538 flow. Second operand has 34 states, 34 states have (on average 138.8235294117647) internal successors, (4720), 34 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:35,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:19:35,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 489 [2023-01-27 20:19:35,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:19:41,650 INFO L130 PetriNetUnfolder]: 4857/8463 cut-off events. [2023-01-27 20:19:41,650 INFO L131 PetriNetUnfolder]: For 1371242/1371242 co-relation queries the response was YES. [2023-01-27 20:19:41,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192575 conditions, 8463 events. 4857/8463 cut-off events. For 1371242/1371242 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 62309 event pairs, 770 based on Foata normal form. 72/8535 useless extension candidates. Maximal degree in co-relation 192315. Up to 3736 conditions per place. [2023-01-27 20:19:41,834 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 711 selfloop transitions, 525 changer transitions 0/1236 dead transitions. [2023-01-27 20:19:41,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 1236 transitions, 77774 flow [2023-01-27 20:19:41,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 20:19:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 20:19:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2698 transitions. [2023-01-27 20:19:41,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903885480572597 [2023-01-27 20:19:41,836 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2698 transitions. [2023-01-27 20:19:41,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2698 transitions. [2023-01-27 20:19:41,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:19:41,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2698 transitions. [2023-01-27 20:19:41,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:41,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:41,842 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:41,842 INFO L175 Difference]: Start difference. First operand has 608 places, 1163 transitions, 72538 flow. Second operand 19 states and 2698 transitions. [2023-01-27 20:19:41,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 1236 transitions, 77774 flow [2023-01-27 20:19:50,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 1236 transitions, 76824 flow, removed 93 selfloop flow, removed 12 redundant places. [2023-01-27 20:19:51,032 INFO L231 Difference]: Finished difference. Result has 618 places, 1183 transitions, 73946 flow [2023-01-27 20:19:51,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=71592, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=509, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=73946, PETRI_PLACES=618, PETRI_TRANSITIONS=1183} [2023-01-27 20:19:51,037 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 595 predicate places. [2023-01-27 20:19:51,037 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 1183 transitions, 73946 flow [2023-01-27 20:19:51,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 138.8235294117647) internal successors, (4720), 34 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:51,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:19:51,038 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:19:51,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2023-01-27 20:19:51,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2023-01-27 20:19:51,244 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:19:51,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:19:51,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2094274681, now seen corresponding path program 91 times [2023-01-27 20:19:51,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:19:51,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082222052] [2023-01-27 20:19:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:19:51,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:19:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:19:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:19:51,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:19:51,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082222052] [2023-01-27 20:19:51,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082222052] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:19:51,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234346878] [2023-01-27 20:19:51,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:19:51,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:19:51,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:19:51,825 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:19:51,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2023-01-27 20:19:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:19:52,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-27 20:19:52,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:19:52,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:19:52,391 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 14 treesize of output 16 [2023-01-27 20:19:52,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:19:52,470 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 46 treesize of output 30 [2023-01-27 20:19:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:19:52,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:19:52,733 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6771 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6771))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))))))) is different from false [2023-01-27 20:19:52,775 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-27 20:19:52,776 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 114 treesize of output 127 [2023-01-27 20:19:52,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:19:52,792 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 74 treesize of output 88 [2023-01-27 20:19:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:19:53,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234346878] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:19:53,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:19:53,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 28 [2023-01-27 20:19:53,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636700608] [2023-01-27 20:19:53,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:19:53,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 20:19:53,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:19:53,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 20:19:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=656, Unknown=1, NotChecked=52, Total=812 [2023-01-27 20:19:53,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-01-27 20:19:53,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 1183 transitions, 73946 flow. Second operand has 29 states, 29 states have (on average 160.79310344827587) internal successors, (4663), 29 states have internal predecessors, (4663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:53,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:19:53,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-01-27 20:19:53,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:20:00,451 INFO L130 PetriNetUnfolder]: 4887/8549 cut-off events. [2023-01-27 20:20:00,451 INFO L131 PetriNetUnfolder]: For 1394093/1394093 co-relation queries the response was YES. [2023-01-27 20:20:00,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195229 conditions, 8549 events. 4887/8549 cut-off events. For 1394093/1394093 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 63340 event pairs, 1720 based on Foata normal form. 20/8569 useless extension candidates. Maximal degree in co-relation 194958. Up to 7649 conditions per place. [2023-01-27 20:20:00,637 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 980 selfloop transitions, 238 changer transitions 0/1218 dead transitions. [2023-01-27 20:20:00,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1218 transitions, 77294 flow [2023-01-27 20:20:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:20:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:20:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2464 transitions. [2023-01-27 20:20:00,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3359236537150648 [2023-01-27 20:20:00,639 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2464 transitions. [2023-01-27 20:20:00,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2464 transitions. [2023-01-27 20:20:00,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:20:00,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2464 transitions. [2023-01-27 20:20:00,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 164.26666666666668) internal successors, (2464), 15 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:00,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:00,644 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:00,655 INFO L175 Difference]: Start difference. First operand has 618 places, 1183 transitions, 73946 flow. Second operand 15 states and 2464 transitions. [2023-01-27 20:20:00,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1218 transitions, 77294 flow [2023-01-27 20:20:09,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 1218 transitions, 76656 flow, removed 189 selfloop flow, removed 13 redundant places. [2023-01-27 20:20:09,949 INFO L231 Difference]: Finished difference. Result has 621 places, 1189 transitions, 74277 flow [2023-01-27 20:20:09,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=73308, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=946, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=74277, PETRI_PLACES=621, PETRI_TRANSITIONS=1189} [2023-01-27 20:20:09,951 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 598 predicate places. [2023-01-27 20:20:09,951 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 1189 transitions, 74277 flow [2023-01-27 20:20:09,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 160.79310344827587) internal successors, (4663), 29 states have internal predecessors, (4663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:09,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:20:09,951 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:20:09,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2023-01-27 20:20:10,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2023-01-27 20:20:10,171 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:20:10,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:20:10,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1076330597, now seen corresponding path program 92 times [2023-01-27 20:20:10,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:20:10,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250955412] [2023-01-27 20:20:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:20:10,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:20:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:20:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:20:10,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:20:10,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250955412] [2023-01-27 20:20:10,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250955412] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:20:10,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089396062] [2023-01-27 20:20:10,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:20:10,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:20:10,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:20:10,775 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:20:10,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2023-01-27 20:20:11,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:20:11,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:20:11,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 53 conjunts are in the unsatisfiable core [2023-01-27 20:20:11,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:20:11,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:20:11,337 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 14 treesize of output 16 [2023-01-27 20:20:11,436 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:20:11,437 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 36 treesize of output 12 [2023-01-27 20:20:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:20:11,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:20:11,626 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6842 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6842))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))) (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse0 c_~o_2~0.offset)))))) is different from false [2023-01-27 20:20:11,737 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-27 20:20:11,737 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 114 treesize of output 127 [2023-01-27 20:20:11,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:20:11,753 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 74 treesize of output 88 [2023-01-27 20:20:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:20:12,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089396062] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:20:12,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:20:12,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 27 [2023-01-27 20:20:12,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984503098] [2023-01-27 20:20:12,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:20:12,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 20:20:12,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:20:12,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 20:20:12,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=606, Unknown=1, NotChecked=50, Total=756 [2023-01-27 20:20:12,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-01-27 20:20:12,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 1189 transitions, 74277 flow. Second operand has 28 states, 28 states have (on average 160.85714285714286) internal successors, (4504), 28 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:12,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:20:12,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-01-27 20:20:12,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:20:18,296 INFO L130 PetriNetUnfolder]: 4853/8487 cut-off events. [2023-01-27 20:20:18,296 INFO L131 PetriNetUnfolder]: For 1338846/1338846 co-relation queries the response was YES. [2023-01-27 20:20:18,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192706 conditions, 8487 events. 4853/8487 cut-off events. For 1338846/1338846 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 62837 event pairs, 1714 based on Foata normal form. 24/8511 useless extension candidates. Maximal degree in co-relation 192444. Up to 7589 conditions per place. [2023-01-27 20:20:18,477 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 1002 selfloop transitions, 211 changer transitions 1/1214 dead transitions. [2023-01-27 20:20:18,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 1214 transitions, 77287 flow [2023-01-27 20:20:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:20:18,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:20:18,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1807 transitions. [2023-01-27 20:20:18,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3359360475924893 [2023-01-27 20:20:18,478 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1807 transitions. [2023-01-27 20:20:18,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1807 transitions. [2023-01-27 20:20:18,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:20:18,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1807 transitions. [2023-01-27 20:20:18,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 164.27272727272728) internal successors, (1807), 11 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:18,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:18,485 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:18,485 INFO L175 Difference]: Start difference. First operand has 621 places, 1189 transitions, 74277 flow. Second operand 11 states and 1807 transitions. [2023-01-27 20:20:18,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 1214 transitions, 77287 flow [2023-01-27 20:20:27,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 1214 transitions, 76633 flow, removed 105 selfloop flow, removed 10 redundant places. [2023-01-27 20:20:27,905 INFO L231 Difference]: Finished difference. Result has 622 places, 1189 transitions, 74041 flow [2023-01-27 20:20:27,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=73560, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=977, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=74041, PETRI_PLACES=622, PETRI_TRANSITIONS=1189} [2023-01-27 20:20:27,906 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 599 predicate places. [2023-01-27 20:20:27,906 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 1189 transitions, 74041 flow [2023-01-27 20:20:27,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.85714285714286) internal successors, (4504), 28 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:27,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:20:27,907 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:20:27,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2023-01-27 20:20:28,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2023-01-27 20:20:28,114 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:20:28,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:20:28,114 INFO L85 PathProgramCache]: Analyzing trace with hash -67631225, now seen corresponding path program 93 times [2023-01-27 20:20:28,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:20:28,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091078358] [2023-01-27 20:20:28,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:20:28,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:20:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:20:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:20:28,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:20:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091078358] [2023-01-27 20:20:28,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091078358] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:20:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111482020] [2023-01-27 20:20:28,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:20:28,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:20:28,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:20:28,668 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:20:28,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2023-01-27 20:20:29,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 20:20:29,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:20:29,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-27 20:20:29,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:20:29,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:20:29,386 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 14 treesize of output 16 [2023-01-27 20:20:29,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:20:29,461 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 65 treesize of output 41 [2023-01-27 20:20:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:20:29,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:20:29,719 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6913 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6913))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset)) (not (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) is different from false [2023-01-27 20:20:29,759 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-27 20:20:29,760 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 114 treesize of output 127 [2023-01-27 20:20:29,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:20:29,775 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 74 treesize of output 88 [2023-01-27 20:20:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:20:30,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111482020] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:20:30,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:20:30,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-01-27 20:20:30,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471389510] [2023-01-27 20:20:30,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:20:30,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 20:20:30,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:20:30,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 20:20:30,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=707, Unknown=1, NotChecked=54, Total=870 [2023-01-27 20:20:30,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-01-27 20:20:30,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 1189 transitions, 74041 flow. Second operand has 30 states, 30 states have (on average 160.8) internal successors, (4824), 30 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:30,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:20:30,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-01-27 20:20:30,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:20:36,207 INFO L130 PetriNetUnfolder]: 4833/8419 cut-off events. [2023-01-27 20:20:36,207 INFO L131 PetriNetUnfolder]: For 1308097/1308097 co-relation queries the response was YES. [2023-01-27 20:20:36,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190820 conditions, 8419 events. 4833/8419 cut-off events. For 1308097/1308097 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 61941 event pairs, 784 based on Foata normal form. 4/8423 useless extension candidates. Maximal degree in co-relation 190558. Up to 4427 conditions per place. [2023-01-27 20:20:36,384 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 516 selfloop transitions, 710 changer transitions 2/1228 dead transitions. [2023-01-27 20:20:36,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 1228 transitions, 77041 flow [2023-01-27 20:20:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 20:20:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 20:20:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2780 transitions. [2023-01-27 20:20:36,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33441597497894865 [2023-01-27 20:20:36,386 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2780 transitions. [2023-01-27 20:20:36,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2780 transitions. [2023-01-27 20:20:36,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:20:36,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2780 transitions. [2023-01-27 20:20:36,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 163.52941176470588) internal successors, (2780), 17 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:36,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:36,391 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:36,391 INFO L175 Difference]: Start difference. First operand has 622 places, 1189 transitions, 74041 flow. Second operand 17 states and 2780 transitions. [2023-01-27 20:20:36,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 1228 transitions, 77041 flow [2023-01-27 20:20:44,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 1228 transitions, 76108 flow, removed 93 selfloop flow, removed 36 redundant places. [2023-01-27 20:20:44,947 INFO L231 Difference]: Finished difference. Result has 600 places, 1190 transitions, 74618 flow [2023-01-27 20:20:44,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=72827, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=705, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=74618, PETRI_PLACES=600, PETRI_TRANSITIONS=1190} [2023-01-27 20:20:44,948 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 577 predicate places. [2023-01-27 20:20:44,948 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 1190 transitions, 74618 flow [2023-01-27 20:20:44,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 160.8) internal successors, (4824), 30 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:44,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:20:44,949 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:20:44,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2023-01-27 20:20:45,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:20:45,156 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:20:45,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:20:45,157 INFO L85 PathProgramCache]: Analyzing trace with hash 194927569, now seen corresponding path program 94 times [2023-01-27 20:20:45,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:20:45,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333142057] [2023-01-27 20:20:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:20:45,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:20:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:20:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:20:45,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:20:45,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333142057] [2023-01-27 20:20:45,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333142057] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:20:45,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105699979] [2023-01-27 20:20:45,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:20:45,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:20:45,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:20:45,751 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:20:45,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2023-01-27 20:20:46,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:20:46,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:20:46,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-27 20:20:46,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:20:46,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:20:46,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:20:46,458 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:20:46,458 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 39 treesize of output 40 [2023-01-27 20:20:46,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:20:46,688 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 46 treesize of output 30 [2023-01-27 20:20:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:20:46,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:20:47,022 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-27 20:20:47,022 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 86 treesize of output 107 [2023-01-27 20:20:47,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:20:47,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-01-27 20:20:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:20:47,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105699979] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:20:47,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:20:47,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-27 20:20:47,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073083096] [2023-01-27 20:20:47,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:20:47,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:20:47,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:20:47,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:20:47,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=860, Unknown=1, NotChecked=0, Total=992 [2023-01-27 20:20:47,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 489 [2023-01-27 20:20:47,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 1190 transitions, 74618 flow. Second operand has 32 states, 32 states have (on average 156.6875) internal successors, (5014), 32 states have internal predecessors, (5014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:47,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:20:47,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 489 [2023-01-27 20:20:47,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:20:53,693 INFO L130 PetriNetUnfolder]: 5051/8737 cut-off events. [2023-01-27 20:20:53,693 INFO L131 PetriNetUnfolder]: For 1467960/1467960 co-relation queries the response was YES. [2023-01-27 20:20:53,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197521 conditions, 8737 events. 5051/8737 cut-off events. For 1467960/1467960 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 64166 event pairs, 177 based on Foata normal form. 12/8749 useless extension candidates. Maximal degree in co-relation 197286. Up to 3124 conditions per place. [2023-01-27 20:20:54,180 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 472 selfloop transitions, 808 changer transitions 3/1283 dead transitions. [2023-01-27 20:20:54,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1283 transitions, 79752 flow [2023-01-27 20:20:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 20:20:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 20:20:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3195 transitions. [2023-01-27 20:20:54,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3266871165644172 [2023-01-27 20:20:54,182 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3195 transitions. [2023-01-27 20:20:54,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3195 transitions. [2023-01-27 20:20:54,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:20:54,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3195 transitions. [2023-01-27 20:20:54,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 159.75) internal successors, (3195), 20 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:54,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:54,189 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:54,189 INFO L175 Difference]: Start difference. First operand has 600 places, 1190 transitions, 74618 flow. Second operand 20 states and 3195 transitions. [2023-01-27 20:20:54,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1283 transitions, 79752 flow [2023-01-27 20:21:02,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 1283 transitions, 78665 flow, removed 72 selfloop flow, removed 12 redundant places. [2023-01-27 20:21:03,032 INFO L231 Difference]: Finished difference. Result has 606 places, 1230 transitions, 76965 flow [2023-01-27 20:21:03,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=72714, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=757, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=76965, PETRI_PLACES=606, PETRI_TRANSITIONS=1230} [2023-01-27 20:21:03,033 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 583 predicate places. [2023-01-27 20:21:03,033 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 1230 transitions, 76965 flow [2023-01-27 20:21:03,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.6875) internal successors, (5014), 32 states have internal predecessors, (5014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:03,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:21:03,034 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:21:03,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2023-01-27 20:21:03,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2023-01-27 20:21:03,240 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:21:03,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:21:03,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1589368989, now seen corresponding path program 95 times [2023-01-27 20:21:03,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:21:03,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434687210] [2023-01-27 20:21:03,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:21:03,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:21:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:21:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:21:04,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:21:04,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434687210] [2023-01-27 20:21:04,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434687210] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:21:04,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023004608] [2023-01-27 20:21:04,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:21:04,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:21:04,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:21:04,137 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:21:04,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2023-01-27 20:21:04,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 20:21:04,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:21:04,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-27 20:21:04,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:21:04,826 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:21:04,836 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-01-27 20:21:04,836 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 29 treesize of output 22 [2023-01-27 20:21:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:21:04,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:21:05,462 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-01-27 20:21:05,462 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 50 treesize of output 54 [2023-01-27 20:21:05,489 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:21:05,490 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 46 treesize of output 1 [2023-01-27 20:21:05,493 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:21:05,493 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 46 treesize of output 1 [2023-01-27 20:21:05,496 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:21:05,505 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 46 treesize of output 1 [2023-01-27 20:21:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 20:21:05,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023004608] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:21:05,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:21:05,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2023-01-27 20:21:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810431157] [2023-01-27 20:21:05,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:21:05,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 20:21:05,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:21:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 20:21:05,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2023-01-27 20:21:05,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-27 20:21:05,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 1230 transitions, 76965 flow. Second operand has 29 states, 29 states have (on average 162.93103448275863) internal successors, (4725), 29 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:05,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:21:05,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-27 20:21:05,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:21:15,071 INFO L130 PetriNetUnfolder]: 6503/11255 cut-off events. [2023-01-27 20:21:15,071 INFO L131 PetriNetUnfolder]: For 1596090/1596090 co-relation queries the response was YES. [2023-01-27 20:21:15,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247686 conditions, 11255 events. 6503/11255 cut-off events. For 1596090/1596090 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 85481 event pairs, 540 based on Foata normal form. 6/11261 useless extension candidates. Maximal degree in co-relation 247450. Up to 3762 conditions per place. [2023-01-27 20:21:15,451 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 833 selfloop transitions, 658 changer transitions 4/1495 dead transitions. [2023-01-27 20:21:15,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1495 transitions, 91347 flow [2023-01-27 20:21:15,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:21:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:21:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2347 transitions. [2023-01-27 20:21:15,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3428279287174993 [2023-01-27 20:21:15,453 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2347 transitions. [2023-01-27 20:21:15,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2347 transitions. [2023-01-27 20:21:15,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:21:15,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2347 transitions. [2023-01-27 20:21:15,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 167.64285714285714) internal successors, (2347), 14 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:15,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:15,458 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:15,458 INFO L175 Difference]: Start difference. First operand has 606 places, 1230 transitions, 76965 flow. Second operand 14 states and 2347 transitions. [2023-01-27 20:21:15,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1495 transitions, 91347 flow Received shutdown request... [2023-01-27 20:21:20,550 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 20:21:20,550 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 20:21:20,599 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 20:21:20,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2023-01-27 20:21:20,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2023-01-27 20:21:20,807 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-27 20:21:20,810 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 20:21:20,810 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 20:21:20,810 INFO L445 BasicCegarLoop]: Path program histogram: [95, 6, 1, 1, 1] [2023-01-27 20:21:20,812 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 20:21:20,812 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 20:21:20,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 08:21:20 BasicIcfg [2023-01-27 20:21:20,815 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 20:21:20,815 INFO L158 Benchmark]: Toolchain (without parser) took 902089.58ms. Allocated memory was 310.4MB in the beginning and 14.2GB in the end (delta: 13.9GB). Free memory was 256.6MB in the beginning and 12.9GB in the end (delta: -12.6GB). Peak memory consumption was 7.1GB. Max. memory is 16.0GB. [2023-01-27 20:21:20,815 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 310.4MB. Free memory is still 254.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 20:21:20,816 INFO L158 Benchmark]: CACSL2BoogieTranslator took 344.34ms. Allocated memory is still 310.4MB. Free memory was 256.6MB in the beginning and 244.7MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 20:21:20,816 INFO L158 Benchmark]: Boogie Procedure Inliner took 72.53ms. Allocated memory is still 310.4MB. Free memory was 244.7MB in the beginning and 242.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 20:21:20,816 INFO L158 Benchmark]: Boogie Preprocessor took 66.70ms. Allocated memory is still 310.4MB. Free memory was 242.6MB in the beginning and 240.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 20:21:20,816 INFO L158 Benchmark]: RCFGBuilder took 811.43ms. Allocated memory is still 310.4MB. Free memory was 240.8MB in the beginning and 220.6MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-01-27 20:21:20,816 INFO L158 Benchmark]: TraceAbstraction took 900778.29ms. Allocated memory was 310.4MB in the beginning and 14.2GB in the end (delta: 13.9GB). Free memory was 219.9MB in the beginning and 12.9GB in the end (delta: -12.7GB). Peak memory consumption was 7.0GB. Max. memory is 16.0GB. [2023-01-27 20:21:20,819 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 310.4MB. Free memory is still 254.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 344.34ms. Allocated memory is still 310.4MB. Free memory was 256.6MB in the beginning and 244.7MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 72.53ms. Allocated memory is still 310.4MB. Free memory was 244.7MB in the beginning and 242.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 66.70ms. Allocated memory is still 310.4MB. Free memory was 242.6MB in the beginning and 240.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 811.43ms. Allocated memory is still 310.4MB. Free memory was 240.8MB in the beginning and 220.6MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 900778.29ms. Allocated memory was 310.4MB in the beginning and 14.2GB in the end (delta: 13.9GB). Free memory was 219.9MB in the beginning and 12.9GB in the end (delta: -12.7GB). Peak memory consumption was 7.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.5s, 207 PlacesBefore, 23 PlacesAfterwards, 221 TransitionsBefore, 20 TransitionsAfterwards, 5400 CoEnabledTransitionPairs, 7 FixpointIterations, 100 TrivialSequentialCompositions, 87 ConcurrentSequentialCompositions, 29 TrivialYvCompositions, 25 ConcurrentYvCompositions, 17 ChoiceCompositions, 258 TotalNumberOfCompositions, 5353 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5064, independent: 5039, independent conditional: 0, independent unconditional: 5039, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3177, independent: 3169, independent conditional: 0, independent unconditional: 3169, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5064, independent: 1870, independent conditional: 0, independent unconditional: 1870, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 3177, unknown conditional: 0, unknown unconditional: 3177] , Statistics on independence cache: Total cache size (in pairs): 28, Positive cache size: 26, Positive conditional cache size: 0, Positive unconditional cache size: 26, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 295 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 900.5s, OverallIterations: 104, TraceHistogramMax: 5, PathProgramHistogramMax: 95, EmptinessCheckTime: 0.0s, AutomataDifference: 665.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.6s, HoareTripleCheckerStatistics: 324 mSolverCounterUnknown, 12710 SdHoareTripleChecker+Valid, 61.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12710 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 55.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1358 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1435 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 55676 IncrementalHoareTripleChecker+Invalid, 58793 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1435 mSolverCounterUnsat, 0 mSDtfsCounter, 55676 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8220 GetRequests, 4807 SyntacticMatches, 53 SemanticMatches, 3360 ConstructedPredicates, 16 IntricatePredicates, 6 DeprecatedPredicates, 24716 ImplicationChecksByTransitivity, 118.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76965occurred in iteration=103, InterpolantAutomatonStates: 1470, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.9s SsaConstructionTime, 9.8s SatisfiabilityAnalysisTime, 170.4s InterpolantComputationTime, 5836 NumberOfCodeBlocks, 5734 NumberOfCodeBlocksAsserted, 348 NumberOfCheckSat, 8349 ConstructedInterpolants, 198 QuantifiedInterpolants, 88521 SizeOfPredicates, 2279 NumberOfNonLiveVariables, 34824 ConjunctsInSsa, 4991 ConjunctsInUnsatCore, 300 InterpolantComputations, 7 PerfectInterpolantSequences, 9081/9961 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown