/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 21:51:41,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 21:51:41,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 21:51:41,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 21:51:41,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 21:51:41,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 21:51:41,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 21:51:41,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 21:51:41,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 21:51:41,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 21:51:41,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 21:51:41,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 21:51:41,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 21:51:41,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 21:51:41,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 21:51:41,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 21:51:41,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 21:51:41,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 21:51:41,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 21:51:41,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 21:51:41,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 21:51:41,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 21:51:41,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 21:51:41,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 21:51:41,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 21:51:41,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 21:51:41,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 21:51:41,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 21:51:41,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 21:51:41,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 21:51:41,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 21:51:41,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 21:51:41,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 21:51:41,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 21:51:41,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 21:51:41,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 21:51:41,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 21:51:41,516 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 21:51:41,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 21:51:41,517 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 21:51:41,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 21:51:41,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 21:51:41,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 21:51:41,518 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 21:51:41,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 21:51:41,519 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 21:51:41,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 21:51:41,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 21:51:41,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 21:51:41,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 21:51:41,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 21:51:41,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 21:51:41,520 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 21:51:41,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 21:51:41,520 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 21:51:41,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 21:51:41,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 21:51:41,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 21:51:41,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 21:51:41,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 21:51:41,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:51:41,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 21:51:41,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 21:51:41,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 21:51:41,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 21:51:41,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 21:51:41,521 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 21:51:41,521 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 21:51:41,521 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 21:51:41,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 21:51:41,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 21:51:41,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 21:51:41,728 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 21:51:41,728 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 21:51:41,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-01-27 21:51:42,633 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 21:51:42,784 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 21:51:42,785 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-01-27 21:51:42,789 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36f63262d/fd94d027402d40b8baf80ce15c3af720/FLAG364b3cc78 [2023-01-27 21:51:42,797 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36f63262d/fd94d027402d40b8baf80ce15c3af720 [2023-01-27 21:51:42,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 21:51:42,800 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 21:51:42,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 21:51:42,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 21:51:42,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 21:51:42,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:51:42" (1/1) ... [2023-01-27 21:51:42,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40da1d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:51:42, skipping insertion in model container [2023-01-27 21:51:42,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:51:42" (1/1) ... [2023-01-27 21:51:42,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 21:51:42,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 21:51:42,922 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2023-01-27 21:51:42,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:51:42,933 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 21:51:42,946 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2023-01-27 21:51:42,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:51:42,955 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:51:42,956 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:51:42,960 INFO L208 MainTranslator]: Completed translation [2023-01-27 21:51:42,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:51:42 WrapperNode [2023-01-27 21:51:42,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 21:51:42,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 21:51:42,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 21:51:42,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 21:51:42,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:51:42" (1/1) ... [2023-01-27 21:51:42,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:51:42" (1/1) ... [2023-01-27 21:51:42,988 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 194 [2023-01-27 21:51:42,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 21:51:42,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 21:51:42,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 21:51:42,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 21:51:42,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:51:42" (1/1) ... [2023-01-27 21:51:42,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:51:42" (1/1) ... [2023-01-27 21:51:42,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:51:42" (1/1) ... [2023-01-27 21:51:42,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:51:42" (1/1) ... [2023-01-27 21:51:43,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:51:42" (1/1) ... [2023-01-27 21:51:43,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:51:42" (1/1) ... [2023-01-27 21:51:43,004 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:51:42" (1/1) ... [2023-01-27 21:51:43,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:51:42" (1/1) ... [2023-01-27 21:51:43,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 21:51:43,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 21:51:43,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 21:51:43,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 21:51:43,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:51:42" (1/1) ... [2023-01-27 21:51:43,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:51:43,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:51:43,042 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 21:51:43,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 21:51:43,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 21:51:43,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 21:51:43,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 21:51:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 21:51:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 21:51:43,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 21:51:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 21:51:43,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 21:51:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-27 21:51:43,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-27 21:51:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 21:51:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 21:51:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 21:51:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 21:51:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 21:51:43,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 21:51:43,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 21:51:43,065 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 21:51:43,130 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 21:51:43,133 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 21:51:43,443 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 21:51:43,544 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 21:51:43,545 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-27 21:51:43,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:51:43 BoogieIcfgContainer [2023-01-27 21:51:43,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 21:51:43,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 21:51:43,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 21:51:43,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 21:51:43,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 09:51:42" (1/3) ... [2023-01-27 21:51:43,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a45566d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:51:43, skipping insertion in model container [2023-01-27 21:51:43,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:51:42" (2/3) ... [2023-01-27 21:51:43,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a45566d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:51:43, skipping insertion in model container [2023-01-27 21:51:43,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:51:43" (3/3) ... [2023-01-27 21:51:43,551 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2023-01-27 21:51:43,561 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 21:51:43,561 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 21:51:43,561 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 21:51:43,632 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 21:51:43,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 144 transitions, 312 flow [2023-01-27 21:51:43,705 INFO L130 PetriNetUnfolder]: 12/141 cut-off events. [2023-01-27 21:51:43,705 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 21:51:43,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 141 events. 12/141 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-01-27 21:51:43,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 144 transitions, 312 flow [2023-01-27 21:51:43,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 131 transitions, 280 flow [2023-01-27 21:51:43,715 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 21:51:43,721 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 131 transitions, 280 flow [2023-01-27 21:51:43,723 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 131 transitions, 280 flow [2023-01-27 21:51:43,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 131 transitions, 280 flow [2023-01-27 21:51:43,765 INFO L130 PetriNetUnfolder]: 12/131 cut-off events. [2023-01-27 21:51:43,765 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 21:51:43,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 131 events. 12/131 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 92 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-01-27 21:51:43,766 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-01-27 21:51:47,070 INFO L134 LiptonReduction]: Checked pairs total: 1489 [2023-01-27 21:51:47,070 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-01-27 21:51:47,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 21:51:47,083 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;@678b1775, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 21:51:47,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 21:51:47,087 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-01-27 21:51:47,087 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 21:51:47,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:47,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:47,088 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:47,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:47,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1718329889, now seen corresponding path program 1 times [2023-01-27 21:51:47,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:47,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197846731] [2023-01-27 21:51:47,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:47,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:51:47,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:47,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197846731] [2023-01-27 21:51:47,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197846731] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:51:47,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:51:47,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 21:51:47,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491360148] [2023-01-27 21:51:47,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:51:47,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:51:47,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:47,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:51:47,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:51:47,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 268 [2023-01-27 21:51:47,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:47,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:47,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 268 [2023-01-27 21:51:47,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:47,599 INFO L130 PetriNetUnfolder]: 360/508 cut-off events. [2023-01-27 21:51:47,599 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-01-27 21:51:47,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1608 event pairs, 39 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-01-27 21:51:47,606 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2023-01-27 21:51:47,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2023-01-27 21:51:47,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:51:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:51:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-01-27 21:51:47,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062189054726368 [2023-01-27 21:51:47,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-01-27 21:51:47,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-01-27 21:51:47,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:47,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-01-27 21:51:47,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:47,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:47,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:47,637 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 407 transitions. [2023-01-27 21:51:47,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 187 flow [2023-01-27 21:51:47,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 165 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-27 21:51:47,641 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-01-27 21:51:47,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-01-27 21:51:47,646 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-01-27 21:51:47,647 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-01-27 21:51:47,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:47,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:47,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:47,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 21:51:47,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:47,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:47,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1448534594, now seen corresponding path program 1 times [2023-01-27 21:51:47,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:47,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194104678] [2023-01-27 21:51:47,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:47,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:51:47,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:47,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194104678] [2023-01-27 21:51:47,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194104678] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:51:47,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:51:47,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:51:47,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193125185] [2023-01-27 21:51:47,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:51:47,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:51:47,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:47,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:51:47,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:51:47,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-01-27 21:51:47,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:47,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:47,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-01-27 21:51:47,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:47,969 INFO L130 PetriNetUnfolder]: 621/928 cut-off events. [2023-01-27 21:51:47,970 INFO L131 PetriNetUnfolder]: For 261/264 co-relation queries the response was YES. [2023-01-27 21:51:47,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2269 conditions, 928 events. 621/928 cut-off events. For 261/264 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3958 event pairs, 194 based on Foata normal form. 34/957 useless extension candidates. Maximal degree in co-relation 487. Up to 484 conditions per place. [2023-01-27 21:51:47,975 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 54 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-01-27 21:51:47,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 60 transitions, 292 flow [2023-01-27 21:51:47,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:51:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:51:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 572 transitions. [2023-01-27 21:51:47,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42686567164179107 [2023-01-27 21:51:47,978 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 572 transitions. [2023-01-27 21:51:47,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 572 transitions. [2023-01-27 21:51:47,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:47,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 572 transitions. [2023-01-27 21:51:47,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.4) internal successors, (572), 5 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:47,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:47,982 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:47,982 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 5 states and 572 transitions. [2023-01-27 21:51:47,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 60 transitions, 292 flow [2023-01-27 21:51:47,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:51:47,985 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 106 flow [2023-01-27 21:51:47,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-01-27 21:51:47,986 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-01-27 21:51:47,986 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 106 flow [2023-01-27 21:51:47,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:47,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:47,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:47,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 21:51:47,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:47,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash 810023898, now seen corresponding path program 1 times [2023-01-27 21:51:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:47,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614774257] [2023-01-27 21:51:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:47,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:51:48,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:48,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614774257] [2023-01-27 21:51:48,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614774257] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:51:48,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:51:48,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:51:48,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035049172] [2023-01-27 21:51:48,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:51:48,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:51:48,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:48,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:51:48,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:51:48,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 268 [2023-01-27 21:51:48,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:48,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:48,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 268 [2023-01-27 21:51:48,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:48,296 INFO L130 PetriNetUnfolder]: 567/867 cut-off events. [2023-01-27 21:51:48,297 INFO L131 PetriNetUnfolder]: For 369/405 co-relation queries the response was YES. [2023-01-27 21:51:48,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 867 events. 567/867 cut-off events. For 369/405 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3523 event pairs, 260 based on Foata normal form. 70/933 useless extension candidates. Maximal degree in co-relation 1398. Up to 568 conditions per place. [2023-01-27 21:51:48,300 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 53 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2023-01-27 21:51:48,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 59 transitions, 296 flow [2023-01-27 21:51:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:51:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:51:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 548 transitions. [2023-01-27 21:51:48,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408955223880597 [2023-01-27 21:51:48,302 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 548 transitions. [2023-01-27 21:51:48,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 548 transitions. [2023-01-27 21:51:48,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:48,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 548 transitions. [2023-01-27 21:51:48,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:48,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:48,305 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:48,305 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 106 flow. Second operand 5 states and 548 transitions. [2023-01-27 21:51:48,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 59 transitions, 296 flow [2023-01-27 21:51:48,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 59 transitions, 292 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 21:51:48,308 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 121 flow [2023-01-27 21:51:48,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-01-27 21:51:48,309 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-01-27 21:51:48,311 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 121 flow [2023-01-27 21:51:48,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:48,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:48,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:48,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 21:51:48,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:48,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:48,312 INFO L85 PathProgramCache]: Analyzing trace with hash -796054142, now seen corresponding path program 1 times [2023-01-27 21:51:48,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:48,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254991900] [2023-01-27 21:51:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:48,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:51:48,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:48,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254991900] [2023-01-27 21:51:48,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254991900] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:51:48,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:51:48,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:51:48,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829417533] [2023-01-27 21:51:48,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:51:48,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:51:48,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:48,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:51:48,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:51:48,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 268 [2023-01-27 21:51:48,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:48,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:48,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 268 [2023-01-27 21:51:48,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:48,512 INFO L130 PetriNetUnfolder]: 419/637 cut-off events. [2023-01-27 21:51:48,512 INFO L131 PetriNetUnfolder]: For 434/470 co-relation queries the response was YES. [2023-01-27 21:51:48,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1640 conditions, 637 events. 419/637 cut-off events. For 434/470 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2508 event pairs, 140 based on Foata normal form. 50/675 useless extension candidates. Maximal degree in co-relation 1378. Up to 371 conditions per place. [2023-01-27 21:51:48,515 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 34 selfloop transitions, 3 changer transitions 25/64 dead transitions. [2023-01-27 21:51:48,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 333 flow [2023-01-27 21:51:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 21:51:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 21:51:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 656 transitions. [2023-01-27 21:51:48,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079601990049751 [2023-01-27 21:51:48,517 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 656 transitions. [2023-01-27 21:51:48,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 656 transitions. [2023-01-27 21:51:48,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:48,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 656 transitions. [2023-01-27 21:51:48,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.33333333333333) internal successors, (656), 6 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:48,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:48,521 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:48,521 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 121 flow. Second operand 6 states and 656 transitions. [2023-01-27 21:51:48,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 333 flow [2023-01-27 21:51:48,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 320 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-27 21:51:48,523 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 102 flow [2023-01-27 21:51:48,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2023-01-27 21:51:48,523 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2023-01-27 21:51:48,524 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 102 flow [2023-01-27 21:51:48,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:48,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:48,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:48,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 21:51:48,524 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:48,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:48,525 INFO L85 PathProgramCache]: Analyzing trace with hash -862745430, now seen corresponding path program 1 times [2023-01-27 21:51:48,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:48,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014529075] [2023-01-27 21:51:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:48,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:51:48,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:48,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014529075] [2023-01-27 21:51:48,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014529075] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:48,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266226382] [2023-01-27 21:51:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:48,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:48,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:51:48,642 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:51:48,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 21:51:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:48,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:51:48,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:51:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:51:48,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:51:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:51:48,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266226382] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:51:48,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:51:48,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 21:51:48,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943776826] [2023-01-27 21:51:48,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:51:48,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 21:51:48,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:48,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 21:51:48,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:51:48,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:51:48,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 102 flow. Second operand has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:48,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:48,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:51:48,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:49,045 INFO L130 PetriNetUnfolder]: 544/799 cut-off events. [2023-01-27 21:51:49,045 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2023-01-27 21:51:49,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2146 conditions, 799 events. 544/799 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3029 event pairs, 139 based on Foata normal form. 16/812 useless extension candidates. Maximal degree in co-relation 2121. Up to 410 conditions per place. [2023-01-27 21:51:49,049 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 58 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2023-01-27 21:51:49,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 372 flow [2023-01-27 21:51:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:51:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:51:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 738 transitions. [2023-01-27 21:51:49,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39339019189765456 [2023-01-27 21:51:49,051 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 738 transitions. [2023-01-27 21:51:49,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 738 transitions. [2023-01-27 21:51:49,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:49,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 738 transitions. [2023-01-27 21:51:49,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.42857142857143) internal successors, (738), 7 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:49,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:51:49,055 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:51:49,055 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 102 flow. Second operand 7 states and 738 transitions. [2023-01-27 21:51:49,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 372 flow [2023-01-27 21:51:49,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 68 transitions, 337 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-01-27 21:51:49,057 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 142 flow [2023-01-27 21:51:49,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=142, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-01-27 21:51:49,058 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-01-27 21:51:49,058 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 142 flow [2023-01-27 21:51:49,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:49,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:49,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:49,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 21:51:49,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:49,265 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:49,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:49,266 INFO L85 PathProgramCache]: Analyzing trace with hash -733147742, now seen corresponding path program 2 times [2023-01-27 21:51:49,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:49,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5041541] [2023-01-27 21:51:49,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:49,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:49,384 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 21:51:49,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:49,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5041541] [2023-01-27 21:51:49,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5041541] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:49,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228223414] [2023-01-27 21:51:49,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:51:49,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:49,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:51:49,390 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:51:49,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 21:51:49,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:51:49,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:51:49,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:51:49,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:51:49,537 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 21:51:49,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:51:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:51:49,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228223414] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:49,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 21:51:49,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-01-27 21:51:49,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289527240] [2023-01-27 21:51:49,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:51:49,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:51:49,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:49,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:51:49,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:51:49,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:51:49,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:49,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:49,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:51:49,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:49,753 INFO L130 PetriNetUnfolder]: 736/1083 cut-off events. [2023-01-27 21:51:49,753 INFO L131 PetriNetUnfolder]: For 1058/1058 co-relation queries the response was YES. [2023-01-27 21:51:49,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3402 conditions, 1083 events. 736/1083 cut-off events. For 1058/1058 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4396 event pairs, 221 based on Foata normal form. 12/1092 useless extension candidates. Maximal degree in co-relation 3380. Up to 648 conditions per place. [2023-01-27 21:51:49,760 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 60 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2023-01-27 21:51:49,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 73 transitions, 449 flow [2023-01-27 21:51:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:51:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:51:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 734 transitions. [2023-01-27 21:51:49,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39125799573560766 [2023-01-27 21:51:49,762 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 734 transitions. [2023-01-27 21:51:49,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 734 transitions. [2023-01-27 21:51:49,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:49,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 734 transitions. [2023-01-27 21:51:49,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 104.85714285714286) internal successors, (734), 7 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:49,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:51:49,765 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:51:49,765 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 142 flow. Second operand 7 states and 734 transitions. [2023-01-27 21:51:49,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 73 transitions, 449 flow [2023-01-27 21:51:49,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 73 transitions, 414 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-01-27 21:51:49,768 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 200 flow [2023-01-27 21:51:49,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-01-27 21:51:49,769 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-01-27 21:51:49,769 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 200 flow [2023-01-27 21:51:49,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:49,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:49,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:49,779 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 21:51:49,979 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,SelfDestructingSolverStorable5 [2023-01-27 21:51:49,981 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:49,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:49,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1999057912, now seen corresponding path program 3 times [2023-01-27 21:51:49,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:49,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599842098] [2023-01-27 21:51:49,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:49,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:50,070 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 21:51:50,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:50,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599842098] [2023-01-27 21:51:50,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599842098] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:50,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378416779] [2023-01-27 21:51:50,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:51:50,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:50,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:51:50,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:51:50,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 21:51:50,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:51:50,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:51:50,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:51:50,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:51:50,212 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 21:51:50,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:51:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:51:50,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378416779] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:50,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 21:51:50,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-01-27 21:51:50,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897954402] [2023-01-27 21:51:50,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:51:50,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:51:50,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:50,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:51:50,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-01-27 21:51:50,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:51:50,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:50,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:50,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:51:50,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:50,440 INFO L130 PetriNetUnfolder]: 840/1246 cut-off events. [2023-01-27 21:51:50,440 INFO L131 PetriNetUnfolder]: For 2142/2142 co-relation queries the response was YES. [2023-01-27 21:51:50,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4494 conditions, 1246 events. 840/1246 cut-off events. For 2142/2142 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5337 event pairs, 211 based on Foata normal form. 16/1259 useless extension candidates. Maximal degree in co-relation 4469. Up to 612 conditions per place. [2023-01-27 21:51:50,445 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 62 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2023-01-27 21:51:50,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 82 transitions, 561 flow [2023-01-27 21:51:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:51:50,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:51:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 741 transitions. [2023-01-27 21:51:50,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39498933901918976 [2023-01-27 21:51:50,447 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 741 transitions. [2023-01-27 21:51:50,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 741 transitions. [2023-01-27 21:51:50,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:50,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 741 transitions. [2023-01-27 21:51:50,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.85714285714286) internal successors, (741), 7 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:50,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:51:50,451 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:51:50,451 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 200 flow. Second operand 7 states and 741 transitions. [2023-01-27 21:51:50,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 82 transitions, 561 flow [2023-01-27 21:51:50,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 82 transitions, 520 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-01-27 21:51:50,454 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 310 flow [2023-01-27 21:51:50,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-01-27 21:51:50,455 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2023-01-27 21:51:50,455 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 310 flow [2023-01-27 21:51:50,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:50,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:50,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:50,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 21:51:50,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:50,662 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:50,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:50,663 INFO L85 PathProgramCache]: Analyzing trace with hash -141700804, now seen corresponding path program 4 times [2023-01-27 21:51:50,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:50,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457154693] [2023-01-27 21:51:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:50,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:50,728 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 21:51:50,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:50,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457154693] [2023-01-27 21:51:50,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457154693] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:50,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410482077] [2023-01-27 21:51:50,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:51:50,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:50,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:51:50,729 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:51:50,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 21:51:50,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:51:50,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:51:50,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:51:50,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:51:50,875 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 21:51:50,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:51:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:51:50,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410482077] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:50,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 21:51:50,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-01-27 21:51:50,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410723116] [2023-01-27 21:51:50,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:51:50,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:51:50,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:50,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:51:50,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-01-27 21:51:50,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:51:50,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:50,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:50,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:51:50,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:51,123 INFO L130 PetriNetUnfolder]: 824/1230 cut-off events. [2023-01-27 21:51:51,123 INFO L131 PetriNetUnfolder]: For 3281/3281 co-relation queries the response was YES. [2023-01-27 21:51:51,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4829 conditions, 1230 events. 824/1230 cut-off events. For 3281/3281 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5239 event pairs, 213 based on Foata normal form. 16/1243 useless extension candidates. Maximal degree in co-relation 4801. Up to 676 conditions per place. [2023-01-27 21:51:51,129 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 58 selfloop transitions, 24 changer transitions 0/83 dead transitions. [2023-01-27 21:51:51,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 83 transitions, 647 flow [2023-01-27 21:51:51,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:51:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:51:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 737 transitions. [2023-01-27 21:51:51,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2023-01-27 21:51:51,131 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 737 transitions. [2023-01-27 21:51:51,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 737 transitions. [2023-01-27 21:51:51,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:51,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 737 transitions. [2023-01-27 21:51:51,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.28571428571429) internal successors, (737), 7 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:51,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:51:51,135 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:51:51,135 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 310 flow. Second operand 7 states and 737 transitions. [2023-01-27 21:51:51,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 83 transitions, 647 flow [2023-01-27 21:51:51,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 83 transitions, 622 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-01-27 21:51:51,142 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 449 flow [2023-01-27 21:51:51,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=449, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2023-01-27 21:51:51,144 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2023-01-27 21:51:51,144 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 449 flow [2023-01-27 21:51:51,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:51,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:51,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:51,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 21:51:51,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:51,350 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:51,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:51,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1944857512, now seen corresponding path program 5 times [2023-01-27 21:51:51,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:51,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651273521] [2023-01-27 21:51:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:51,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:51,428 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 21:51:51,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:51,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651273521] [2023-01-27 21:51:51,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651273521] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:51,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214438781] [2023-01-27 21:51:51,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:51:51,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:51,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:51:51,429 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:51:51,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 21:51:51,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:51:51,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:51:51,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:51:51,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:51:51,569 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 21:51:51,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:51:51,614 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 21:51:51,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214438781] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:51:51,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:51:51,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-01-27 21:51:51,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385567809] [2023-01-27 21:51:51,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:51:51,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 21:51:51,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:51,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 21:51:51,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-01-27 21:51:51,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 268 [2023-01-27 21:51:51,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 449 flow. Second operand has 14 states, 14 states have (on average 97.14285714285714) internal successors, (1360), 14 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:51,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:51,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 268 [2023-01-27 21:51:51,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:51,913 INFO L130 PetriNetUnfolder]: 850/1272 cut-off events. [2023-01-27 21:51:51,913 INFO L131 PetriNetUnfolder]: For 4742/4742 co-relation queries the response was YES. [2023-01-27 21:51:51,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5548 conditions, 1272 events. 850/1272 cut-off events. For 4742/4742 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5108 event pairs, 36 based on Foata normal form. 14/1285 useless extension candidates. Maximal degree in co-relation 5517. Up to 522 conditions per place. [2023-01-27 21:51:51,920 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 87 selfloop transitions, 43 changer transitions 0/130 dead transitions. [2023-01-27 21:51:51,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 130 transitions, 1191 flow [2023-01-27 21:51:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 21:51:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 21:51:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1123 transitions. [2023-01-27 21:51:51,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38093622795115334 [2023-01-27 21:51:51,922 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1123 transitions. [2023-01-27 21:51:51,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1123 transitions. [2023-01-27 21:51:51,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:51,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1123 transitions. [2023-01-27 21:51:51,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 102.0909090909091) internal successors, (1123), 11 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:51,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:51,927 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:51,927 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 449 flow. Second operand 11 states and 1123 transitions. [2023-01-27 21:51:51,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 130 transitions, 1191 flow [2023-01-27 21:51:51,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 130 transitions, 1122 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-01-27 21:51:51,939 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 723 flow [2023-01-27 21:51:51,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=723, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-01-27 21:51:51,940 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2023-01-27 21:51:51,940 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 723 flow [2023-01-27 21:51:51,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 97.14285714285714) internal successors, (1360), 14 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:51,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:51,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:51,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 21:51:52,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:52,148 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:52,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:52,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1112015240, now seen corresponding path program 6 times [2023-01-27 21:51:52,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:52,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124007667] [2023-01-27 21:51:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:52,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:52,246 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 21:51:52,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:52,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124007667] [2023-01-27 21:51:52,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124007667] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:52,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942671590] [2023-01-27 21:51:52,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:51:52,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:52,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:51:52,261 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:51:52,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 21:51:52,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:51:52,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:51:52,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:51:52,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:51:52,448 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 21:51:52,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:51:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:51:52,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942671590] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:52,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 21:51:52,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2023-01-27 21:51:52,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501982246] [2023-01-27 21:51:52,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:51:52,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:51:52,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:52,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:51:52,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:51:52,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:51:52,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 723 flow. Second operand has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:52,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:52,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:51:52,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:52,726 INFO L130 PetriNetUnfolder]: 823/1215 cut-off events. [2023-01-27 21:51:52,727 INFO L131 PetriNetUnfolder]: For 5383/5383 co-relation queries the response was YES. [2023-01-27 21:51:52,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5568 conditions, 1215 events. 823/1215 cut-off events. For 5383/5383 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4731 event pairs, 206 based on Foata normal form. 14/1226 useless extension candidates. Maximal degree in co-relation 5533. Up to 682 conditions per place. [2023-01-27 21:51:52,733 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 65 selfloop transitions, 36 changer transitions 0/105 dead transitions. [2023-01-27 21:51:52,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 1062 flow [2023-01-27 21:51:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:51:52,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:51:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 735 transitions. [2023-01-27 21:51:52,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917910447761194 [2023-01-27 21:51:52,736 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 735 transitions. [2023-01-27 21:51:52,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 735 transitions. [2023-01-27 21:51:52,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:52,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 735 transitions. [2023-01-27 21:51:52,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.0) internal successors, (735), 7 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:52,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:51:52,739 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:51:52,739 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 723 flow. Second operand 7 states and 735 transitions. [2023-01-27 21:51:52,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 1062 flow [2023-01-27 21:51:52,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 1019 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-27 21:51:52,748 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 836 flow [2023-01-27 21:51:52,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=836, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-01-27 21:51:52,749 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2023-01-27 21:51:52,749 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 836 flow [2023-01-27 21:51:52,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:52,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:52,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:52,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-27 21:51:52,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:52,955 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:52,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1943059232, now seen corresponding path program 1 times [2023-01-27 21:51:52,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:52,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861091867] [2023-01-27 21:51:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:52,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:51:53,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:53,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861091867] [2023-01-27 21:51:53,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861091867] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:53,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139727242] [2023-01-27 21:51:53,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:53,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:53,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:51:53,005 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:51:53,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 21:51:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:53,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:51:53,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:51:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:51:53,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:51:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:51:53,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139727242] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:53,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 21:51:53,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-01-27 21:51:53,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870323220] [2023-01-27 21:51:53,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:51:53,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:51:53,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:53,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:51:53,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-01-27 21:51:53,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-01-27 21:51:53,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 836 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:53,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:53,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-01-27 21:51:53,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:53,228 INFO L130 PetriNetUnfolder]: 699/1023 cut-off events. [2023-01-27 21:51:53,228 INFO L131 PetriNetUnfolder]: For 6336/6552 co-relation queries the response was YES. [2023-01-27 21:51:53,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4939 conditions, 1023 events. 699/1023 cut-off events. For 6336/6552 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4169 event pairs, 218 based on Foata normal form. 186/1150 useless extension candidates. Maximal degree in co-relation 4901. Up to 779 conditions per place. [2023-01-27 21:51:53,234 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 81 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2023-01-27 21:51:53,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 1203 flow [2023-01-27 21:51:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:51:53,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:51:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 554 transitions. [2023-01-27 21:51:53,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134328358208955 [2023-01-27 21:51:53,235 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 554 transitions. [2023-01-27 21:51:53,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 554 transitions. [2023-01-27 21:51:53,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:53,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 554 transitions. [2023-01-27 21:51:53,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:53,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:53,238 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:53,238 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 836 flow. Second operand 5 states and 554 transitions. [2023-01-27 21:51:53,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 1203 flow [2023-01-27 21:51:53,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 100 transitions, 1106 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-01-27 21:51:53,245 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 789 flow [2023-01-27 21:51:53,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=789, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2023-01-27 21:51:53,245 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2023-01-27 21:51:53,245 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 789 flow [2023-01-27 21:51:53,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:53,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:53,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:53,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 21:51:53,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:53,451 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:53,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:53,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2072621387, now seen corresponding path program 1 times [2023-01-27 21:51:53,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:53,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630043362] [2023-01-27 21:51:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:53,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:51:53,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:53,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630043362] [2023-01-27 21:51:53,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630043362] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:53,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077696130] [2023-01-27 21:51:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:53,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:53,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:51:53,883 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:51:53,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 21:51:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:53,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-27 21:51:53,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:51:54,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:51:54,182 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 21:51:54,268 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:51:54,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:51:54,274 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 17 treesize of output 10 [2023-01-27 21:51:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:51:54,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:51:54,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:51:54,415 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 54 treesize of output 38 [2023-01-27 21:51:54,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-01-27 21:51:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:51:54,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077696130] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:51:54,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:51:54,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-01-27 21:51:54,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400458363] [2023-01-27 21:51:54,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:51:54,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 21:51:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 21:51:54,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=515, Unknown=1, NotChecked=0, Total=600 [2023-01-27 21:51:54,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 268 [2023-01-27 21:51:54,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 789 flow. Second operand has 25 states, 25 states have (on average 80.04) internal successors, (2001), 25 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:54,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:54,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 268 [2023-01-27 21:51:54,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:55,782 INFO L130 PetriNetUnfolder]: 1474/2221 cut-off events. [2023-01-27 21:51:55,782 INFO L131 PetriNetUnfolder]: For 10370/10634 co-relation queries the response was YES. [2023-01-27 21:51:55,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10709 conditions, 2221 events. 1474/2221 cut-off events. For 10370/10634 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 10388 event pairs, 91 based on Foata normal form. 222/2439 useless extension candidates. Maximal degree in co-relation 10009. Up to 1209 conditions per place. [2023-01-27 21:51:55,798 INFO L137 encePairwiseOnDemand]: 257/268 looper letters, 147 selfloop transitions, 126 changer transitions 4/283 dead transitions. [2023-01-27 21:51:55,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 283 transitions, 2995 flow [2023-01-27 21:51:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 21:51:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 21:51:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1401 transitions. [2023-01-27 21:51:55,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3267257462686567 [2023-01-27 21:51:55,802 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1401 transitions. [2023-01-27 21:51:55,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1401 transitions. [2023-01-27 21:51:55,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:55,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1401 transitions. [2023-01-27 21:51:55,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 87.5625) internal successors, (1401), 16 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:55,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 268.0) internal successors, (4556), 17 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:55,808 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 268.0) internal successors, (4556), 17 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:55,808 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 789 flow. Second operand 16 states and 1401 transitions. [2023-01-27 21:51:55,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 283 transitions, 2995 flow [2023-01-27 21:51:55,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 283 transitions, 2957 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-01-27 21:51:55,826 INFO L231 Difference]: Finished difference. Result has 92 places, 181 transitions, 2247 flow [2023-01-27 21:51:55,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2247, PETRI_PLACES=92, PETRI_TRANSITIONS=181} [2023-01-27 21:51:55,826 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2023-01-27 21:51:55,826 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 181 transitions, 2247 flow [2023-01-27 21:51:55,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 80.04) internal successors, (2001), 25 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:55,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:55,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:55,834 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 21:51:56,038 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,SelfDestructingSolverStorable11 [2023-01-27 21:51:56,038 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:56,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:56,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1602150613, now seen corresponding path program 1 times [2023-01-27 21:51:56,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:56,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804259404] [2023-01-27 21:51:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:56,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:51:56,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:56,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804259404] [2023-01-27 21:51:56,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804259404] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:56,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454829136] [2023-01-27 21:51:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:56,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:56,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:51:56,308 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 21:51:56,336 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 21:51:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:56,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-27 21:51:56,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:51:56,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:51:56,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:51:56,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:51:56,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:51:56,559 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 22 treesize of output 10 [2023-01-27 21:51:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:51:56,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:51:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:51:56,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454829136] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:51:56,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:51:56,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 13 [2023-01-27 21:51:56,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804637288] [2023-01-27 21:51:56,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:51:56,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:51:56,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:56,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:51:56,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:51:56,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-01-27 21:51:56,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 181 transitions, 2247 flow. Second operand has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:56,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:56,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-01-27 21:51:56,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:57,177 INFO L130 PetriNetUnfolder]: 2293/3450 cut-off events. [2023-01-27 21:51:57,177 INFO L131 PetriNetUnfolder]: For 26439/26802 co-relation queries the response was YES. [2023-01-27 21:51:57,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19287 conditions, 3450 events. 2293/3450 cut-off events. For 26439/26802 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 17516 event pairs, 188 based on Foata normal form. 293/3669 useless extension candidates. Maximal degree in co-relation 18044. Up to 2277 conditions per place. [2023-01-27 21:51:57,201 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 165 selfloop transitions, 144 changer transitions 1/318 dead transitions. [2023-01-27 21:51:57,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 318 transitions, 4320 flow [2023-01-27 21:51:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:51:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:51:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 762 transitions. [2023-01-27 21:51:57,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.355410447761194 [2023-01-27 21:51:57,203 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 762 transitions. [2023-01-27 21:51:57,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 762 transitions. [2023-01-27 21:51:57,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:57,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 762 transitions. [2023-01-27 21:51:57,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:57,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:57,206 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:57,206 INFO L175 Difference]: Start difference. First operand has 92 places, 181 transitions, 2247 flow. Second operand 8 states and 762 transitions. [2023-01-27 21:51:57,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 318 transitions, 4320 flow [2023-01-27 21:51:57,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 318 transitions, 4124 flow, removed 97 selfloop flow, removed 1 redundant places. [2023-01-27 21:51:57,249 INFO L231 Difference]: Finished difference. Result has 102 places, 254 transitions, 3488 flow [2023-01-27 21:51:57,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3488, PETRI_PLACES=102, PETRI_TRANSITIONS=254} [2023-01-27 21:51:57,249 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2023-01-27 21:51:57,249 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 254 transitions, 3488 flow [2023-01-27 21:51:57,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:57,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:57,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:57,255 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 21:51:57,455 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,SelfDestructingSolverStorable12 [2023-01-27 21:51:57,455 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:57,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1383538529, now seen corresponding path program 2 times [2023-01-27 21:51:57,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:57,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889105235] [2023-01-27 21:51:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:57,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:51:57,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:57,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889105235] [2023-01-27 21:51:57,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889105235] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:57,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149972787] [2023-01-27 21:51:57,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:51:57,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:57,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:51:57,730 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 21:51:57,772 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 21:51:57,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:51:57,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:51:57,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-27 21:51:57,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:51:57,898 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 22 treesize of output 10 [2023-01-27 21:51:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:51:57,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:51:57,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:51:57,932 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 23 treesize of output 16 [2023-01-27 21:51:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:51:57,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149972787] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:51:57,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:51:57,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-27 21:51:57,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075764799] [2023-01-27 21:51:57,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:51:57,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:51:57,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:57,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:51:57,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:51:57,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 268 [2023-01-27 21:51:57,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 254 transitions, 3488 flow. Second operand has 11 states, 11 states have (on average 102.45454545454545) internal successors, (1127), 11 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:57,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:57,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 268 [2023-01-27 21:51:57,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:58,519 INFO L130 PetriNetUnfolder]: 2863/4300 cut-off events. [2023-01-27 21:51:58,519 INFO L131 PetriNetUnfolder]: For 41105/41630 co-relation queries the response was YES. [2023-01-27 21:51:58,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26217 conditions, 4300 events. 2863/4300 cut-off events. For 41105/41630 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 22668 event pairs, 552 based on Foata normal form. 431/4615 useless extension candidates. Maximal degree in co-relation 24563. Up to 3447 conditions per place. [2023-01-27 21:51:58,546 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 237 selfloop transitions, 132 changer transitions 1/378 dead transitions. [2023-01-27 21:51:58,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 378 transitions, 5719 flow [2023-01-27 21:51:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:51:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:51:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 774 transitions. [2023-01-27 21:51:58,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125799573560768 [2023-01-27 21:51:58,548 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 774 transitions. [2023-01-27 21:51:58,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 774 transitions. [2023-01-27 21:51:58,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:58,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 774 transitions. [2023-01-27 21:51:58,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.57142857142857) internal successors, (774), 7 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:58,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:51:58,551 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:51:58,551 INFO L175 Difference]: Start difference. First operand has 102 places, 254 transitions, 3488 flow. Second operand 7 states and 774 transitions. [2023-01-27 21:51:58,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 378 transitions, 5719 flow [2023-01-27 21:51:58,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 378 transitions, 5552 flow, removed 43 selfloop flow, removed 2 redundant places. [2023-01-27 21:51:58,607 INFO L231 Difference]: Finished difference. Result has 109 places, 323 transitions, 4796 flow [2023-01-27 21:51:58,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4796, PETRI_PLACES=109, PETRI_TRANSITIONS=323} [2023-01-27 21:51:58,607 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2023-01-27 21:51:58,607 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 323 transitions, 4796 flow [2023-01-27 21:51:58,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 102.45454545454545) internal successors, (1127), 11 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:58,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:51:58,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:51:58,615 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 21:51:58,813 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,SelfDestructingSolverStorable13 [2023-01-27 21:51:58,813 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:51:58,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:51:58,813 INFO L85 PathProgramCache]: Analyzing trace with hash 403272333, now seen corresponding path program 3 times [2023-01-27 21:51:58,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:51:58,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153180641] [2023-01-27 21:51:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:51:58,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:51:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:51:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:51:59,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:51:59,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153180641] [2023-01-27 21:51:59,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153180641] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:51:59,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644044653] [2023-01-27 21:51:59,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:51:59,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:51:59,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:51:59,169 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 21:51:59,208 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 21:51:59,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:51:59,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:51:59,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-27 21:51:59,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:51:59,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:51:59,396 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 21:51:59,417 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 15 treesize of output 7 [2023-01-27 21:51:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:51:59,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:51:59,461 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_571 (Array Int Int))) (= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_571) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-01-27 21:51:59,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:51:59,476 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 21:51:59,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-01-27 21:51:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-01-27 21:51:59,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644044653] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:51:59,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:51:59,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-27 21:51:59,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390615478] [2023-01-27 21:51:59,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:51:59,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:51:59,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:51:59,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:51:59,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=4, NotChecked=34, Total=380 [2023-01-27 21:51:59,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-01-27 21:51:59,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 323 transitions, 4796 flow. Second operand has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:51:59,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:51:59,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-01-27 21:51:59,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:52:00,243 INFO L130 PetriNetUnfolder]: 3264/4913 cut-off events. [2023-01-27 21:52:00,243 INFO L131 PetriNetUnfolder]: For 50847/51506 co-relation queries the response was YES. [2023-01-27 21:52:00,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31355 conditions, 4913 events. 3264/4913 cut-off events. For 50847/51506 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26822 event pairs, 295 based on Foata normal form. 545/5323 useless extension candidates. Maximal degree in co-relation 29641. Up to 2800 conditions per place. [2023-01-27 21:52:00,279 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 157 selfloop transitions, 253 changer transitions 1/419 dead transitions. [2023-01-27 21:52:00,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 419 transitions, 6615 flow [2023-01-27 21:52:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:52:00,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:52:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 754 transitions. [2023-01-27 21:52:00,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40191897654584224 [2023-01-27 21:52:00,281 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 754 transitions. [2023-01-27 21:52:00,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 754 transitions. [2023-01-27 21:52:00,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:52:00,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 754 transitions. [2023-01-27 21:52:00,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 107.71428571428571) internal successors, (754), 7 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:00,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:52:00,284 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:52:00,284 INFO L175 Difference]: Start difference. First operand has 109 places, 323 transitions, 4796 flow. Second operand 7 states and 754 transitions. [2023-01-27 21:52:00,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 419 transitions, 6615 flow [2023-01-27 21:52:00,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 419 transitions, 6400 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-01-27 21:52:00,374 INFO L231 Difference]: Finished difference. Result has 115 places, 361 transitions, 5880 flow [2023-01-27 21:52:00,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=4581, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5880, PETRI_PLACES=115, PETRI_TRANSITIONS=361} [2023-01-27 21:52:00,375 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2023-01-27 21:52:00,375 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 361 transitions, 5880 flow [2023-01-27 21:52:00,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:00,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:52:00,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:52:00,380 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 21:52:00,580 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,SelfDestructingSolverStorable14 [2023-01-27 21:52:00,580 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:52:00,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:52:00,581 INFO L85 PathProgramCache]: Analyzing trace with hash -399472957, now seen corresponding path program 4 times [2023-01-27 21:52:00,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:52:00,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946592590] [2023-01-27 21:52:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:52:00,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:52:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:52:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:00,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:52:00,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946592590] [2023-01-27 21:52:00,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946592590] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:52:00,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535992034] [2023-01-27 21:52:00,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:52:00,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:00,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:52:00,918 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 21:52:00,920 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 21:52:01,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:52:01,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:52:01,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-27 21:52:01,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:52:01,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:52:01,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:52:01,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:52:01,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:52:01,203 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 21:52:01,249 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 22 treesize of output 10 [2023-01-27 21:52:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:52:01,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:52:01,329 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_620 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_620) c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) c_~res1~0))) is different from false [2023-01-27 21:52:01,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:01,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 43 [2023-01-27 21:52:01,417 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 634 treesize of output 594 [2023-01-27 21:52:01,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 116 [2023-01-27 21:52:01,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 112 [2023-01-27 21:52:01,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 54 [2023-01-27 21:52:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:52:01,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535992034] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:52:01,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:52:01,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2023-01-27 21:52:01,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289669120] [2023-01-27 21:52:01,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:52:01,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 21:52:01,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:52:01,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 21:52:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=390, Unknown=16, NotChecked=42, Total=552 [2023-01-27 21:52:01,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-01-27 21:52:01,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 361 transitions, 5880 flow. Second operand has 24 states, 24 states have (on average 86.04166666666667) internal successors, (2065), 24 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:01,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:52:01,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-01-27 21:52:01,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:52:01,792 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_620 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_620) c_~A~0.base) c_~A~0.offset) c_~res2~0))) (= c_~res2~0 c_~res1~0) (forall ((v_ArrVal_619 (Array Int Int)) (v_ArrVal_620 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_619))) (= (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_620) c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ c_~res1~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)))))) is different from false [2023-01-27 21:52:02,523 INFO L130 PetriNetUnfolder]: 3739/5617 cut-off events. [2023-01-27 21:52:02,524 INFO L131 PetriNetUnfolder]: For 74169/74999 co-relation queries the response was YES. [2023-01-27 21:52:02,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38807 conditions, 5617 events. 3739/5617 cut-off events. For 74169/74999 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 31140 event pairs, 761 based on Foata normal form. 696/6157 useless extension candidates. Maximal degree in co-relation 36706. Up to 4456 conditions per place. [2023-01-27 21:52:02,554 INFO L137 encePairwiseOnDemand]: 250/268 looper letters, 279 selfloop transitions, 210 changer transitions 1/498 dead transitions. [2023-01-27 21:52:02,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 498 transitions, 8506 flow [2023-01-27 21:52:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 21:52:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 21:52:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 943 transitions. [2023-01-27 21:52:02,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35186567164179106 [2023-01-27 21:52:02,557 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 943 transitions. [2023-01-27 21:52:02,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 943 transitions. [2023-01-27 21:52:02,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:52:02,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 943 transitions. [2023-01-27 21:52:02,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.3) internal successors, (943), 10 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:02,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:02,564 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:02,565 INFO L175 Difference]: Start difference. First operand has 115 places, 361 transitions, 5880 flow. Second operand 10 states and 943 transitions. [2023-01-27 21:52:02,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 498 transitions, 8506 flow [2023-01-27 21:52:02,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 498 transitions, 8287 flow, removed 46 selfloop flow, removed 2 redundant places. [2023-01-27 21:52:02,697 INFO L231 Difference]: Finished difference. Result has 126 places, 444 transitions, 7517 flow [2023-01-27 21:52:02,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=5709, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7517, PETRI_PLACES=126, PETRI_TRANSITIONS=444} [2023-01-27 21:52:02,697 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2023-01-27 21:52:02,697 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 444 transitions, 7517 flow [2023-01-27 21:52:02,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.04166666666667) internal successors, (2065), 24 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:02,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:52:02,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:52:02,707 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 21:52:02,903 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,SelfDestructingSolverStorable15 [2023-01-27 21:52:02,903 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:52:02,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:52:02,903 INFO L85 PathProgramCache]: Analyzing trace with hash 568034103, now seen corresponding path program 2 times [2023-01-27 21:52:02,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:52:02,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284048824] [2023-01-27 21:52:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:52:02,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:52:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:52:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:52:03,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:52:03,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284048824] [2023-01-27 21:52:03,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284048824] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:52:03,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463858381] [2023-01-27 21:52:03,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:52:03,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:03,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:52:03,274 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 21:52:03,275 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 21:52:03,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:52:03,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:52:03,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-27 21:52:03,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:52:03,559 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:52:03,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:03,561 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 17 treesize of output 10 [2023-01-27 21:52:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:03,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:52:03,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:03,601 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 23 treesize of output 16 [2023-01-27 21:52:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:03,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463858381] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:52:03,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:52:03,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-01-27 21:52:03,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573375938] [2023-01-27 21:52:03,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:52:03,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 21:52:03,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:52:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 21:52:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2023-01-27 21:52:03,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-27 21:52:03,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 444 transitions, 7517 flow. Second operand has 25 states, 25 states have (on average 81.2) internal successors, (2030), 25 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:03,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:52:03,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-27 21:52:03,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:52:05,152 INFO L130 PetriNetUnfolder]: 4359/6570 cut-off events. [2023-01-27 21:52:05,152 INFO L131 PetriNetUnfolder]: For 79032/79032 co-relation queries the response was YES. [2023-01-27 21:52:05,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48721 conditions, 6570 events. 4359/6570 cut-off events. For 79032/79032 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 36053 event pairs, 1102 based on Foata normal form. 4/6553 useless extension candidates. Maximal degree in co-relation 46599. Up to 5862 conditions per place. [2023-01-27 21:52:05,192 INFO L137 encePairwiseOnDemand]: 256/268 looper letters, 387 selfloop transitions, 160 changer transitions 2/549 dead transitions. [2023-01-27 21:52:05,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 549 transitions, 9735 flow [2023-01-27 21:52:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 21:52:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 21:52:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1308 transitions. [2023-01-27 21:52:05,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3253731343283582 [2023-01-27 21:52:05,194 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1308 transitions. [2023-01-27 21:52:05,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1308 transitions. [2023-01-27 21:52:05,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:52:05,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1308 transitions. [2023-01-27 21:52:05,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 87.2) internal successors, (1308), 15 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:05,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:05,199 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:05,199 INFO L175 Difference]: Start difference. First operand has 126 places, 444 transitions, 7517 flow. Second operand 15 states and 1308 transitions. [2023-01-27 21:52:05,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 549 transitions, 9735 flow [2023-01-27 21:52:05,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 549 transitions, 9488 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-01-27 21:52:05,390 INFO L231 Difference]: Finished difference. Result has 142 places, 477 transitions, 8155 flow [2023-01-27 21:52:05,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=7274, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8155, PETRI_PLACES=142, PETRI_TRANSITIONS=477} [2023-01-27 21:52:05,390 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2023-01-27 21:52:05,390 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 477 transitions, 8155 flow [2023-01-27 21:52:05,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.2) internal successors, (2030), 25 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:05,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:52:05,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:52:05,398 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 21:52:05,596 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,SelfDestructingSolverStorable16 [2023-01-27 21:52:05,596 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:52:05,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:52:05,596 INFO L85 PathProgramCache]: Analyzing trace with hash -697470791, now seen corresponding path program 3 times [2023-01-27 21:52:05,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:52:05,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504933012] [2023-01-27 21:52:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:52:05,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:52:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:52:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:52:05,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:52:05,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504933012] [2023-01-27 21:52:05,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504933012] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:52:05,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503316167] [2023-01-27 21:52:05,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:52:05,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:05,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:52:05,998 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 21:52:06,000 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 21:52:06,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:52:06,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:52:06,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-27 21:52:06,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:52:06,329 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:52:06,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:06,330 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 17 treesize of output 10 [2023-01-27 21:52:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:52:06,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:52:06,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:06,366 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 23 treesize of output 16 [2023-01-27 21:52:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:52:06,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503316167] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:52:06,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:52:06,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-01-27 21:52:06,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046570772] [2023-01-27 21:52:06,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:52:06,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 21:52:06,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:52:06,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 21:52:06,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-01-27 21:52:06,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 268 [2023-01-27 21:52:06,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 477 transitions, 8155 flow. Second operand has 23 states, 23 states have (on average 84.26086956521739) internal successors, (1938), 23 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:06,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:52:06,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 268 [2023-01-27 21:52:06,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:52:08,293 INFO L130 PetriNetUnfolder]: 4450/6752 cut-off events. [2023-01-27 21:52:08,293 INFO L131 PetriNetUnfolder]: For 83548/83892 co-relation queries the response was YES. [2023-01-27 21:52:08,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51149 conditions, 6752 events. 4450/6752 cut-off events. For 83548/83892 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 38752 event pairs, 734 based on Foata normal form. 222/6894 useless extension candidates. Maximal degree in co-relation 50512. Up to 5138 conditions per place. [2023-01-27 21:52:08,354 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 332 selfloop transitions, 274 changer transitions 4/628 dead transitions. [2023-01-27 21:52:08,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 628 transitions, 11238 flow [2023-01-27 21:52:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 21:52:08,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 21:52:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1265 transitions. [2023-01-27 21:52:08,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3371535181236674 [2023-01-27 21:52:08,356 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1265 transitions. [2023-01-27 21:52:08,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1265 transitions. [2023-01-27 21:52:08,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:52:08,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1265 transitions. [2023-01-27 21:52:08,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 90.35714285714286) internal successors, (1265), 14 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:08,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:08,361 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:08,361 INFO L175 Difference]: Start difference. First operand has 142 places, 477 transitions, 8155 flow. Second operand 14 states and 1265 transitions. [2023-01-27 21:52:08,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 628 transitions, 11238 flow [2023-01-27 21:52:08,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 628 transitions, 10909 flow, removed 77 selfloop flow, removed 4 redundant places. [2023-01-27 21:52:08,623 INFO L231 Difference]: Finished difference. Result has 156 places, 551 transitions, 9820 flow [2023-01-27 21:52:08,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=7884, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9820, PETRI_PLACES=156, PETRI_TRANSITIONS=551} [2023-01-27 21:52:08,623 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 126 predicate places. [2023-01-27 21:52:08,623 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 551 transitions, 9820 flow [2023-01-27 21:52:08,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 84.26086956521739) internal successors, (1938), 23 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:08,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:52:08,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:52:08,629 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 21:52:08,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:08,829 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:52:08,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:52:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1676074169, now seen corresponding path program 4 times [2023-01-27 21:52:08,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:52:08,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001233147] [2023-01-27 21:52:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:52:08,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:52:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:52:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:52:09,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:52:09,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001233147] [2023-01-27 21:52:09,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001233147] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:52:09,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992124367] [2023-01-27 21:52:09,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:52:09,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:09,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:52:09,178 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 21:52:09,179 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 21:52:09,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:52:09,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:52:09,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 64 conjunts are in the unsatisfiable core [2023-01-27 21:52:09,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:52:09,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:52:09,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:52:09,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:52:09,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:52:09,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:09,720 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 17 treesize of output 15 [2023-01-27 21:52:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:52:09,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:52:10,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:10,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2023-01-27 21:52:10,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:10,183 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 398 treesize of output 382 [2023-01-27 21:52:10,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:10,200 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 182 treesize of output 174 [2023-01-27 21:52:10,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:10,208 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 166 treesize of output 142 [2023-01-27 21:52:10,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:10,217 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 70 treesize of output 71 [2023-01-27 21:52:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:52:10,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992124367] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:52:10,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:52:10,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 29 [2023-01-27 21:52:10,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367060152] [2023-01-27 21:52:10,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:52:10,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 21:52:10,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:52:10,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 21:52:10,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=768, Unknown=8, NotChecked=0, Total=930 [2023-01-27 21:52:10,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 268 [2023-01-27 21:52:10,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 551 transitions, 9820 flow. Second operand has 31 states, 31 states have (on average 70.90322580645162) internal successors, (2198), 31 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:10,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:52:10,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 268 [2023-01-27 21:52:10,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:52:13,264 INFO L130 PetriNetUnfolder]: 5346/8076 cut-off events. [2023-01-27 21:52:13,264 INFO L131 PetriNetUnfolder]: For 108616/108616 co-relation queries the response was YES. [2023-01-27 21:52:13,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63914 conditions, 8076 events. 5346/8076 cut-off events. For 108616/108616 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 46058 event pairs, 1186 based on Foata normal form. 1/8077 useless extension candidates. Maximal degree in co-relation 63242. Up to 6260 conditions per place. [2023-01-27 21:52:13,327 INFO L137 encePairwiseOnDemand]: 256/268 looper letters, 449 selfloop transitions, 385 changer transitions 3/837 dead transitions. [2023-01-27 21:52:13,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 837 transitions, 15440 flow [2023-01-27 21:52:13,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-27 21:52:13,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-27 21:52:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2724 transitions. [2023-01-27 21:52:13,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28233830845771146 [2023-01-27 21:52:13,331 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2724 transitions. [2023-01-27 21:52:13,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2724 transitions. [2023-01-27 21:52:13,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:52:13,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2724 transitions. [2023-01-27 21:52:13,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 75.66666666666667) internal successors, (2724), 36 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:13,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 268.0) internal successors, (9916), 37 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:13,341 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 268.0) internal successors, (9916), 37 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:13,341 INFO L175 Difference]: Start difference. First operand has 156 places, 551 transitions, 9820 flow. Second operand 36 states and 2724 transitions. [2023-01-27 21:52:13,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 837 transitions, 15440 flow [2023-01-27 21:52:13,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 837 transitions, 15317 flow, removed 45 selfloop flow, removed 4 redundant places. [2023-01-27 21:52:13,700 INFO L231 Difference]: Finished difference. Result has 200 places, 711 transitions, 13823 flow [2023-01-27 21:52:13,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=9722, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13823, PETRI_PLACES=200, PETRI_TRANSITIONS=711} [2023-01-27 21:52:13,701 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2023-01-27 21:52:13,701 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 711 transitions, 13823 flow [2023-01-27 21:52:13,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 70.90322580645162) internal successors, (2198), 31 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:13,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:52:13,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:52:13,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-01-27 21:52:13,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:13,902 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:52:13,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:52:13,902 INFO L85 PathProgramCache]: Analyzing trace with hash 298877543, now seen corresponding path program 5 times [2023-01-27 21:52:13,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:52:13,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985202084] [2023-01-27 21:52:13,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:52:13,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:52:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:52:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:14,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:52:14,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985202084] [2023-01-27 21:52:14,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985202084] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:52:14,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563800226] [2023-01-27 21:52:14,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:52:14,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:14,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:52:14,231 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 21:52:14,233 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 21:52:14,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:52:14,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:52:14,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-27 21:52:14,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:52:14,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:52:14,449 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 21:52:14,483 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 22 treesize of output 10 [2023-01-27 21:52:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:14,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:52:14,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:14,544 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 54 treesize of output 38 [2023-01-27 21:52:14,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-01-27 21:52:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:14,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563800226] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:52:14,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:52:14,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-27 21:52:14,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181635301] [2023-01-27 21:52:14,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:52:14,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:52:14,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:52:14,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:52:14,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=294, Unknown=1, NotChecked=0, Total=380 [2023-01-27 21:52:14,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-01-27 21:52:14,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 711 transitions, 13823 flow. Second operand has 20 states, 20 states have (on average 97.4) internal successors, (1948), 20 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:14,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:52:14,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-01-27 21:52:14,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:52:16,206 INFO L130 PetriNetUnfolder]: 5069/7662 cut-off events. [2023-01-27 21:52:16,206 INFO L131 PetriNetUnfolder]: For 143441/144370 co-relation queries the response was YES. [2023-01-27 21:52:16,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66061 conditions, 7662 events. 5069/7662 cut-off events. For 143441/144370 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 44792 event pairs, 952 based on Foata normal form. 524/7978 useless extension candidates. Maximal degree in co-relation 65740. Up to 6134 conditions per place. [2023-01-27 21:52:16,262 INFO L137 encePairwiseOnDemand]: 261/268 looper letters, 451 selfloop transitions, 295 changer transitions 1/766 dead transitions. [2023-01-27 21:52:16,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 766 transitions, 16035 flow [2023-01-27 21:52:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:52:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:52:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 746 transitions. [2023-01-27 21:52:16,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976545842217484 [2023-01-27 21:52:16,264 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 746 transitions. [2023-01-27 21:52:16,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 746 transitions. [2023-01-27 21:52:16,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:52:16,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 746 transitions. [2023-01-27 21:52:16,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.57142857142857) internal successors, (746), 7 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:16,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:52:16,266 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:52:16,266 INFO L175 Difference]: Start difference. First operand has 200 places, 711 transitions, 13823 flow. Second operand 7 states and 746 transitions. [2023-01-27 21:52:16,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 766 transitions, 16035 flow [2023-01-27 21:52:16,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 766 transitions, 15685 flow, removed 157 selfloop flow, removed 5 redundant places. [2023-01-27 21:52:16,720 INFO L231 Difference]: Finished difference. Result has 202 places, 716 transitions, 14237 flow [2023-01-27 21:52:16,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=13477, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14237, PETRI_PLACES=202, PETRI_TRANSITIONS=716} [2023-01-27 21:52:16,721 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2023-01-27 21:52:16,721 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 716 transitions, 14237 flow [2023-01-27 21:52:16,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.4) internal successors, (1948), 20 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:16,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:52:16,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:52:16,726 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 21:52:16,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:16,925 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:52:16,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:52:16,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1609767657, now seen corresponding path program 6 times [2023-01-27 21:52:16,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:52:16,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274228850] [2023-01-27 21:52:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:52:16,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:52:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:52:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:17,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:52:17,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274228850] [2023-01-27 21:52:17,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274228850] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:52:17,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733156036] [2023-01-27 21:52:17,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:52:17,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:17,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:52:17,167 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 21:52:17,169 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 21:52:17,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:52:17,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:52:17,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-27 21:52:17,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:52:17,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:52:17,376 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 21:52:17,398 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 15 treesize of output 7 [2023-01-27 21:52:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:17,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:52:17,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:17,449 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 54 treesize of output 38 [2023-01-27 21:52:17,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-01-27 21:52:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:17,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733156036] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:52:17,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:52:17,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-27 21:52:17,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580811284] [2023-01-27 21:52:17,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:52:17,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:52:17,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:52:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:52:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=293, Unknown=1, NotChecked=0, Total=380 [2023-01-27 21:52:17,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-01-27 21:52:17,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 716 transitions, 14237 flow. Second operand has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:17,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:52:17,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-01-27 21:52:17,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:52:19,251 INFO L130 PetriNetUnfolder]: 5138/7780 cut-off events. [2023-01-27 21:52:19,251 INFO L131 PetriNetUnfolder]: For 152784/153695 co-relation queries the response was YES. [2023-01-27 21:52:19,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67746 conditions, 7780 events. 5138/7780 cut-off events. For 152784/153695 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 45883 event pairs, 989 based on Foata normal form. 545/8104 useless extension candidates. Maximal degree in co-relation 67471. Up to 6906 conditions per place. [2023-01-27 21:52:19,309 INFO L137 encePairwiseOnDemand]: 261/268 looper letters, 512 selfloop transitions, 228 changer transitions 1/760 dead transitions. [2023-01-27 21:52:19,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 760 transitions, 16294 flow [2023-01-27 21:52:19,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:52:19,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:52:19,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 741 transitions. [2023-01-27 21:52:19,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39498933901918976 [2023-01-27 21:52:19,310 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 741 transitions. [2023-01-27 21:52:19,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 741 transitions. [2023-01-27 21:52:19,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:52:19,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 741 transitions. [2023-01-27 21:52:19,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.85714285714286) internal successors, (741), 7 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:19,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:52:19,312 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:52:19,312 INFO L175 Difference]: Start difference. First operand has 202 places, 716 transitions, 14237 flow. Second operand 7 states and 741 transitions. [2023-01-27 21:52:19,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 760 transitions, 16294 flow [2023-01-27 21:52:19,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 760 transitions, 15710 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-01-27 21:52:19,830 INFO L231 Difference]: Finished difference. Result has 204 places, 721 transitions, 14255 flow [2023-01-27 21:52:19,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=13653, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14255, PETRI_PLACES=204, PETRI_TRANSITIONS=721} [2023-01-27 21:52:19,830 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2023-01-27 21:52:19,831 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 721 transitions, 14255 flow [2023-01-27 21:52:19,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:19,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:52:19,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:52:19,838 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 21:52:20,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:20,032 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:52:20,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:52:20,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1065189005, now seen corresponding path program 7 times [2023-01-27 21:52:20,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:52:20,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252178586] [2023-01-27 21:52:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:52:20,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:52:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:52:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:20,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:52:20,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252178586] [2023-01-27 21:52:20,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252178586] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:52:20,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905711031] [2023-01-27 21:52:20,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:52:20,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:20,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:52:20,223 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 21:52:20,225 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 21:52:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:52:20,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-27 21:52:20,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:52:20,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:52:20,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:52:20,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:52:20,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:52:20,517 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 15 treesize of output 7 [2023-01-27 21:52:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:52:20,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:52:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:20,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905711031] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:52:20,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:52:20,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 13 [2023-01-27 21:52:20,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042654806] [2023-01-27 21:52:20,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:52:20,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:52:20,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:52:20,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:52:20,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:52:20,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-01-27 21:52:20,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 721 transitions, 14255 flow. Second operand has 15 states, 15 states have (on average 86.86666666666666) internal successors, (1303), 15 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:20,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:52:20,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-01-27 21:52:20,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:52:22,111 INFO L130 PetriNetUnfolder]: 5235/7939 cut-off events. [2023-01-27 21:52:22,111 INFO L131 PetriNetUnfolder]: For 155806/156770 co-relation queries the response was YES. [2023-01-27 21:52:22,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68934 conditions, 7939 events. 5235/7939 cut-off events. For 155806/156770 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 47060 event pairs, 1042 based on Foata normal form. 559/8283 useless extension candidates. Maximal degree in co-relation 68658. Up to 6760 conditions per place. [2023-01-27 21:52:22,184 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 512 selfloop transitions, 273 changer transitions 1/805 dead transitions. [2023-01-27 21:52:22,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 805 transitions, 17110 flow [2023-01-27 21:52:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:52:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:52:22,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 751 transitions. [2023-01-27 21:52:22,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35027985074626866 [2023-01-27 21:52:22,186 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 751 transitions. [2023-01-27 21:52:22,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 751 transitions. [2023-01-27 21:52:22,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:52:22,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 751 transitions. [2023-01-27 21:52:22,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 93.875) internal successors, (751), 8 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:22,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:22,188 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:22,188 INFO L175 Difference]: Start difference. First operand has 204 places, 721 transitions, 14255 flow. Second operand 8 states and 751 transitions. [2023-01-27 21:52:22,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 805 transitions, 17110 flow [2023-01-27 21:52:22,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 805 transitions, 16559 flow, removed 32 selfloop flow, removed 6 redundant places. [2023-01-27 21:52:22,853 INFO L231 Difference]: Finished difference. Result has 208 places, 756 transitions, 15149 flow [2023-01-27 21:52:22,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=13742, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15149, PETRI_PLACES=208, PETRI_TRANSITIONS=756} [2023-01-27 21:52:22,854 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2023-01-27 21:52:22,854 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 756 transitions, 15149 flow [2023-01-27 21:52:22,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 86.86666666666666) internal successors, (1303), 15 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:22,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:52:22,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:52:22,874 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 21:52:23,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:23,059 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:52:23,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:52:23,059 INFO L85 PathProgramCache]: Analyzing trace with hash -359134195, now seen corresponding path program 8 times [2023-01-27 21:52:23,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:52:23,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845677107] [2023-01-27 21:52:23,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:52:23,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:52:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:52:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:23,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:52:23,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845677107] [2023-01-27 21:52:23,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845677107] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:52:23,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609618128] [2023-01-27 21:52:23,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:52:23,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:23,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:52:23,254 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 21:52:23,274 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 21:52:23,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:52:23,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:52:23,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-27 21:52:23,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:52:23,417 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 15 treesize of output 7 [2023-01-27 21:52:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:23,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:52:23,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:23,448 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 23 treesize of output 16 [2023-01-27 21:52:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:23,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609618128] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:52:23,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:52:23,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-27 21:52:23,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596999276] [2023-01-27 21:52:23,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:52:23,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:52:23,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:52:23,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:52:23,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:52:23,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 268 [2023-01-27 21:52:23,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 756 transitions, 15149 flow. Second operand has 11 states, 11 states have (on average 102.27272727272727) internal successors, (1125), 11 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:23,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:52:23,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 268 [2023-01-27 21:52:23,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:52:25,005 INFO L130 PetriNetUnfolder]: 5394/8174 cut-off events. [2023-01-27 21:52:25,005 INFO L131 PetriNetUnfolder]: For 168610/169622 co-relation queries the response was YES. [2023-01-27 21:52:25,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71644 conditions, 8174 events. 5394/8174 cut-off events. For 168610/169622 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 48702 event pairs, 1166 based on Foata normal form. 577/8520 useless extension candidates. Maximal degree in co-relation 71366. Up to 7407 conditions per place. [2023-01-27 21:52:25,077 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 551 selfloop transitions, 237 changer transitions 1/808 dead transitions. [2023-01-27 21:52:25,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 808 transitions, 17441 flow [2023-01-27 21:52:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:52:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:52:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 766 transitions. [2023-01-27 21:52:25,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40831556503198296 [2023-01-27 21:52:25,080 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 766 transitions. [2023-01-27 21:52:25,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 766 transitions. [2023-01-27 21:52:25,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:52:25,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 766 transitions. [2023-01-27 21:52:25,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.42857142857143) internal successors, (766), 7 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:25,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:52:25,082 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:52:25,082 INFO L175 Difference]: Start difference. First operand has 208 places, 756 transitions, 15149 flow. Second operand 7 states and 766 transitions. [2023-01-27 21:52:25,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 808 transitions, 17441 flow [2023-01-27 21:52:25,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 808 transitions, 17042 flow, removed 97 selfloop flow, removed 2 redundant places. [2023-01-27 21:52:25,723 INFO L231 Difference]: Finished difference. Result has 214 places, 770 transitions, 15608 flow [2023-01-27 21:52:25,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=14750, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15608, PETRI_PLACES=214, PETRI_TRANSITIONS=770} [2023-01-27 21:52:25,724 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 184 predicate places. [2023-01-27 21:52:25,724 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 770 transitions, 15608 flow [2023-01-27 21:52:25,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 102.27272727272727) internal successors, (1125), 11 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:25,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:52:25,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:52:25,729 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 21:52:25,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:25,925 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:52:25,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:52:25,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2022426635, now seen corresponding path program 9 times [2023-01-27 21:52:25,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:52:25,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345154497] [2023-01-27 21:52:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:52:25,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:52:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:52:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:52:26,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:52:26,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345154497] [2023-01-27 21:52:26,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345154497] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:52:26,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184606867] [2023-01-27 21:52:26,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:52:26,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:26,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:52:26,225 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 21:52:26,226 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 21:52:26,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:52:26,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:52:26,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-27 21:52:26,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:52:26,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:52:26,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:52:26,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:52:26,468 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 21:52:26,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:52:26,502 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 21:52:26,527 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 22 treesize of output 10 [2023-01-27 21:52:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:52:26,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:52:26,581 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_989 (Array Int Int))) (= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_989) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-01-27 21:52:26,637 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_988 (Array Int Int)) (v_ArrVal_989 (Array Int Int))) (= (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_988) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_989) c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0))) is different from false [2023-01-27 21:52:26,645 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_988 (Array Int Int)) (v_ArrVal_987 (Array Int Int)) (v_ArrVal_989 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_987))) (= (+ c_~res2~0 (select (select (store (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_988) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_989) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (+ c_~res1~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2023-01-27 21:52:26,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:26,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 40 [2023-01-27 21:52:26,653 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 2678 treesize of output 2422 [2023-01-27 21:52:26,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2023-01-27 21:52:26,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 66 [2023-01-27 21:52:26,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 118 [2023-01-27 21:52:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-01-27 21:52:26,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184606867] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:52:26,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:52:26,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2023-01-27 21:52:26,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87986490] [2023-01-27 21:52:26,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:52:26,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 21:52:26,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:52:26,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 21:52:26,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=308, Unknown=6, NotChecked=114, Total=506 [2023-01-27 21:52:26,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-01-27 21:52:26,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 770 transitions, 15608 flow. Second operand has 23 states, 23 states have (on average 85.95652173913044) internal successors, (1977), 23 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:26,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:52:26,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-01-27 21:52:26,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:52:28,521 INFO L130 PetriNetUnfolder]: 5560/8482 cut-off events. [2023-01-27 21:52:28,521 INFO L131 PetriNetUnfolder]: For 171143/172080 co-relation queries the response was YES. [2023-01-27 21:52:28,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74122 conditions, 8482 events. 5560/8482 cut-off events. For 171143/172080 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 51567 event pairs, 618 based on Foata normal form. 487/8714 useless extension candidates. Maximal degree in co-relation 73770. Up to 5408 conditions per place. [2023-01-27 21:52:28,592 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 361 selfloop transitions, 472 changer transitions 1/853 dead transitions. [2023-01-27 21:52:28,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 853 transitions, 18537 flow [2023-01-27 21:52:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 21:52:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 21:52:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 847 transitions. [2023-01-27 21:52:28,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3511608623548922 [2023-01-27 21:52:28,593 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 847 transitions. [2023-01-27 21:52:28,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 847 transitions. [2023-01-27 21:52:28,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:52:28,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 847 transitions. [2023-01-27 21:52:28,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.11111111111111) internal successors, (847), 9 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:28,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:28,595 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:28,595 INFO L175 Difference]: Start difference. First operand has 214 places, 770 transitions, 15608 flow. Second operand 9 states and 847 transitions. [2023-01-27 21:52:28,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 853 transitions, 18537 flow [2023-01-27 21:52:29,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 853 transitions, 18116 flow, removed 85 selfloop flow, removed 3 redundant places. [2023-01-27 21:52:29,269 INFO L231 Difference]: Finished difference. Result has 223 places, 797 transitions, 17167 flow [2023-01-27 21:52:29,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=15187, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17167, PETRI_PLACES=223, PETRI_TRANSITIONS=797} [2023-01-27 21:52:29,269 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 193 predicate places. [2023-01-27 21:52:29,269 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 797 transitions, 17167 flow [2023-01-27 21:52:29,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 85.95652173913044) internal successors, (1977), 23 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:29,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:52:29,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:52:29,274 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 21:52:29,470 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,SelfDestructingSolverStorable23 [2023-01-27 21:52:29,470 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:52:29,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:52:29,471 INFO L85 PathProgramCache]: Analyzing trace with hash 333485237, now seen corresponding path program 5 times [2023-01-27 21:52:29,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:52:29,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185714462] [2023-01-27 21:52:29,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:52:29,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:52:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:52:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:52:30,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:52:30,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185714462] [2023-01-27 21:52:30,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185714462] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:52:30,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396008202] [2023-01-27 21:52:30,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:52:30,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:30,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:52:30,143 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 21:52:30,145 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 21:52:30,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:52:30,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:52:30,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 68 conjunts are in the unsatisfiable core [2023-01-27 21:52:30,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:52:30,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:52:30,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:52:30,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-01-27 21:52:30,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:52:30,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:52:30,485 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 21:52:30,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:52:30,549 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 21:52:30,681 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:52:30,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:30,682 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 17 treesize of output 10 [2023-01-27 21:52:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:52:30,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:52:31,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:31,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2023-01-27 21:52:31,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:31,023 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 410 treesize of output 370 [2023-01-27 21:52:31,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 152 [2023-01-27 21:52:31,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 140 [2023-01-27 21:52:31,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:52:31,045 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 76 treesize of output 71 [2023-01-27 21:52:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:52:31,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396008202] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:52:31,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:52:31,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2023-01-27 21:52:31,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521068663] [2023-01-27 21:52:31,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:52:31,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 21:52:31,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:52:31,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 21:52:31,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=700, Unknown=10, NotChecked=0, Total=812 [2023-01-27 21:52:31,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 268 [2023-01-27 21:52:31,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 797 transitions, 17167 flow. Second operand has 29 states, 29 states have (on average 71.20689655172414) internal successors, (2065), 29 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:52:31,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:52:31,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 268 [2023-01-27 21:52:31,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:52:34,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:52:37,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:52:39,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:52:41,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:52:43,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:52:49,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:52:51,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:52:53,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:52:55,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:52:57,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:52:59,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:53:01,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:53:03,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:53:05,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:53:07,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:53:08,167 INFO L130 PetriNetUnfolder]: 7519/11354 cut-off events. [2023-01-27 21:53:08,168 INFO L131 PetriNetUnfolder]: For 226593/226593 co-relation queries the response was YES. [2023-01-27 21:53:08,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100681 conditions, 11354 events. 7519/11354 cut-off events. For 226593/226593 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 69070 event pairs, 577 based on Foata normal form. 4/11358 useless extension candidates. Maximal degree in co-relation 100204. Up to 5475 conditions per place. [2023-01-27 21:53:08,267 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 464 selfloop transitions, 726 changer transitions 7/1197 dead transitions. [2023-01-27 21:53:08,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1197 transitions, 24962 flow [2023-01-27 21:53:08,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-27 21:53:08,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-27 21:53:08,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3133 transitions. [2023-01-27 21:53:08,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29225746268656716 [2023-01-27 21:53:08,270 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3133 transitions. [2023-01-27 21:53:08,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3133 transitions. [2023-01-27 21:53:08,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:53:08,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3133 transitions. [2023-01-27 21:53:08,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 78.325) internal successors, (3133), 40 states have internal predecessors, (3133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:08,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 268.0) internal successors, (10988), 41 states have internal predecessors, (10988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:08,278 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 268.0) internal successors, (10988), 41 states have internal predecessors, (10988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:08,278 INFO L175 Difference]: Start difference. First operand has 223 places, 797 transitions, 17167 flow. Second operand 40 states and 3133 transitions. [2023-01-27 21:53:08,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 1197 transitions, 24962 flow [2023-01-27 21:53:09,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 1197 transitions, 24058 flow, removed 358 selfloop flow, removed 2 redundant places. [2023-01-27 21:53:09,602 INFO L231 Difference]: Finished difference. Result has 274 places, 947 transitions, 21598 flow [2023-01-27 21:53:09,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=16763, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=595, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=21598, PETRI_PLACES=274, PETRI_TRANSITIONS=947} [2023-01-27 21:53:09,603 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 244 predicate places. [2023-01-27 21:53:09,603 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 947 transitions, 21598 flow [2023-01-27 21:53:09,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 71.20689655172414) internal successors, (2065), 29 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:09,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:53:09,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:53:09,609 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 21:53:09,804 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,SelfDestructingSolverStorable24 [2023-01-27 21:53:09,804 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:53:09,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:53:09,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1871775729, now seen corresponding path program 10 times [2023-01-27 21:53:09,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:53:09,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621561829] [2023-01-27 21:53:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:53:09,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:53:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:53:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:09,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:53:09,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621561829] [2023-01-27 21:53:09,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621561829] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:53:09,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11273672] [2023-01-27 21:53:09,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:53:09,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:53:09,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:53:09,991 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 21:53:09,993 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 21:53:10,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:53:10,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:53:10,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-27 21:53:10,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:53:10,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:53:10,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:53:10,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:53:10,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:53:10,261 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 15 treesize of output 7 [2023-01-27 21:53:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:53:10,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:53:10,322 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1090 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1090) c_~A~0.base))) (= (+ c_~res1~0 (select .cse0 c_~A~0.offset)) (+ c_~res2~0 (select .cse0 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset)))))) is different from false [2023-01-27 21:53:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:10,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11273672] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:53:10,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:53:10,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 5] total 15 [2023-01-27 21:53:10,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142120089] [2023-01-27 21:53:10,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:53:10,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 21:53:10,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:53:10,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 21:53:10,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=188, Unknown=1, NotChecked=28, Total=272 [2023-01-27 21:53:10,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-01-27 21:53:10,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 947 transitions, 21598 flow. Second operand has 17 states, 17 states have (on average 86.58823529411765) internal successors, (1472), 17 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:10,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:53:10,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-01-27 21:53:10,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:53:13,153 INFO L130 PetriNetUnfolder]: 7031/10645 cut-off events. [2023-01-27 21:53:13,153 INFO L131 PetriNetUnfolder]: For 278738/279926 co-relation queries the response was YES. [2023-01-27 21:53:13,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102700 conditions, 10645 events. 7031/10645 cut-off events. For 278738/279926 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 66200 event pairs, 1637 based on Foata normal form. 544/10848 useless extension candidates. Maximal degree in co-relation 102382. Up to 9633 conditions per place. [2023-01-27 21:53:13,242 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 714 selfloop transitions, 256 changer transitions 1/998 dead transitions. [2023-01-27 21:53:13,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 998 transitions, 24357 flow [2023-01-27 21:53:13,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:53:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:53:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 747 transitions. [2023-01-27 21:53:13,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34841417910447764 [2023-01-27 21:53:13,244 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 747 transitions. [2023-01-27 21:53:13,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 747 transitions. [2023-01-27 21:53:13,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:53:13,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 747 transitions. [2023-01-27 21:53:13,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 93.375) internal successors, (747), 8 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:13,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:13,246 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:13,246 INFO L175 Difference]: Start difference. First operand has 274 places, 947 transitions, 21598 flow. Second operand 8 states and 747 transitions. [2023-01-27 21:53:13,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 998 transitions, 24357 flow [2023-01-27 21:53:14,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 998 transitions, 22708 flow, removed 483 selfloop flow, removed 13 redundant places. [2023-01-27 21:53:14,761 INFO L231 Difference]: Finished difference. Result has 271 places, 966 transitions, 21092 flow [2023-01-27 21:53:14,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=19949, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=947, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=21092, PETRI_PLACES=271, PETRI_TRANSITIONS=966} [2023-01-27 21:53:14,763 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 241 predicate places. [2023-01-27 21:53:14,763 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 966 transitions, 21092 flow [2023-01-27 21:53:14,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 86.58823529411765) internal successors, (1472), 17 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:14,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:53:14,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:53:14,768 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 21:53:14,968 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,SelfDestructingSolverStorable25 [2023-01-27 21:53:14,968 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:53:14,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:53:14,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1958985957, now seen corresponding path program 6 times [2023-01-27 21:53:14,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:53:14,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661242714] [2023-01-27 21:53:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:53:14,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:53:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:53:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:53:15,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:53:15,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661242714] [2023-01-27 21:53:15,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661242714] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:53:15,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391076808] [2023-01-27 21:53:15,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:53:15,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:53:15,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:53:15,289 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 21:53:15,292 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 21:53:15,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:53:15,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:53:15,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-27 21:53:15,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:53:15,644 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:53:15,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:53:15,646 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 17 treesize of output 10 [2023-01-27 21:53:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:15,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:53:15,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:53:15,702 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 19 treesize of output 16 [2023-01-27 21:53:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:15,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391076808] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:53:15,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:53:15,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-01-27 21:53:15,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333726744] [2023-01-27 21:53:15,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:53:15,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 21:53:15,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:53:15,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 21:53:15,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-01-27 21:53:15,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-27 21:53:15,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 966 transitions, 21092 flow. Second operand has 25 states, 25 states have (on average 81.2) internal successors, (2030), 25 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:15,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:53:15,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-27 21:53:15,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:53:19,245 INFO L130 PetriNetUnfolder]: 7884/11935 cut-off events. [2023-01-27 21:53:19,246 INFO L131 PetriNetUnfolder]: For 237079/237079 co-relation queries the response was YES. [2023-01-27 21:53:19,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107907 conditions, 11935 events. 7884/11935 cut-off events. For 237079/237079 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 72726 event pairs, 2179 based on Foata normal form. 3/11938 useless extension candidates. Maximal degree in co-relation 107589. Up to 10720 conditions per place. [2023-01-27 21:53:19,348 INFO L137 encePairwiseOnDemand]: 256/268 looper letters, 745 selfloop transitions, 347 changer transitions 2/1094 dead transitions. [2023-01-27 21:53:19,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 1094 transitions, 25208 flow [2023-01-27 21:53:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 21:53:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 21:53:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1474 transitions. [2023-01-27 21:53:19,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3235294117647059 [2023-01-27 21:53:19,350 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1474 transitions. [2023-01-27 21:53:19,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1474 transitions. [2023-01-27 21:53:19,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:53:19,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1474 transitions. [2023-01-27 21:53:19,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 86.70588235294117) internal successors, (1474), 17 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:19,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 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 21:53:19,353 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 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 21:53:19,354 INFO L175 Difference]: Start difference. First operand has 271 places, 966 transitions, 21092 flow. Second operand 17 states and 1474 transitions. [2023-01-27 21:53:19,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 1094 transitions, 25208 flow [2023-01-27 21:53:20,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1094 transitions, 24685 flow, removed 138 selfloop flow, removed 3 redundant places. [2023-01-27 21:53:20,711 INFO L231 Difference]: Finished difference. Result has 291 places, 1022 transitions, 22796 flow [2023-01-27 21:53:20,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=20587, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=22796, PETRI_PLACES=291, PETRI_TRANSITIONS=1022} [2023-01-27 21:53:20,712 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 261 predicate places. [2023-01-27 21:53:20,712 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 1022 transitions, 22796 flow [2023-01-27 21:53:20,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.2) internal successors, (2030), 25 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:20,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:53:20,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:53:20,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-01-27 21:53:20,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:53:20,913 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:53:20,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:53:20,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1383039907, now seen corresponding path program 7 times [2023-01-27 21:53:20,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:53:20,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26337929] [2023-01-27 21:53:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:53:20,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:53:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:53:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:53:21,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:53:21,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26337929] [2023-01-27 21:53:21,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26337929] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:53:21,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549237379] [2023-01-27 21:53:21,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:53:21,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:53:21,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:53:21,187 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 21:53:21,187 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 21:53:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:53:21,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-27 21:53:21,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:53:21,534 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:53:21,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:53:21,536 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 17 treesize of output 10 [2023-01-27 21:53:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:53:21,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:53:21,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:53:21,590 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 16 [2023-01-27 21:53:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:53:21,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549237379] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:53:21,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:53:21,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-01-27 21:53:21,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517833966] [2023-01-27 21:53:21,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:53:21,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 21:53:21,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:53:21,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 21:53:21,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-01-27 21:53:21,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 268 [2023-01-27 21:53:21,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 1022 transitions, 22796 flow. Second operand has 22 states, 22 states have (on average 84.36363636363636) internal successors, (1856), 22 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 21:53:21,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:53:21,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 268 [2023-01-27 21:53:21,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:53:25,698 INFO L130 PetriNetUnfolder]: 8016/12267 cut-off events. [2023-01-27 21:53:25,698 INFO L131 PetriNetUnfolder]: For 246393/246807 co-relation queries the response was YES. [2023-01-27 21:53:25,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112298 conditions, 12267 events. 8016/12267 cut-off events. For 246393/246807 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 78160 event pairs, 1537 based on Foata normal form. 250/12441 useless extension candidates. Maximal degree in co-relation 111972. Up to 8946 conditions per place. [2023-01-27 21:53:25,811 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 594 selfloop transitions, 525 changer transitions 4/1171 dead transitions. [2023-01-27 21:53:25,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1171 transitions, 27157 flow [2023-01-27 21:53:25,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 21:53:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 21:53:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1545 transitions. [2023-01-27 21:53:25,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3391132572431958 [2023-01-27 21:53:25,813 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1545 transitions. [2023-01-27 21:53:25,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1545 transitions. [2023-01-27 21:53:25,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:53:25,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1545 transitions. [2023-01-27 21:53:25,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 90.88235294117646) internal successors, (1545), 17 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:25,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 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 21:53:25,816 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 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 21:53:25,816 INFO L175 Difference]: Start difference. First operand has 291 places, 1022 transitions, 22796 flow. Second operand 17 states and 1545 transitions. [2023-01-27 21:53:25,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1171 transitions, 27157 flow [2023-01-27 21:53:27,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1171 transitions, 26652 flow, removed 168 selfloop flow, removed 6 redundant places. [2023-01-27 21:53:27,254 INFO L231 Difference]: Finished difference. Result has 305 places, 1087 transitions, 24851 flow [2023-01-27 21:53:27,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=22409, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=24851, PETRI_PLACES=305, PETRI_TRANSITIONS=1087} [2023-01-27 21:53:27,255 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 275 predicate places. [2023-01-27 21:53:27,255 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 1087 transitions, 24851 flow [2023-01-27 21:53:27,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 84.36363636363636) internal successors, (1856), 22 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 21:53:27,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:53:27,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:53:27,262 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 21:53:27,460 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,SelfDestructingSolverStorable27 [2023-01-27 21:53:27,461 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:53:27,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:53:27,461 INFO L85 PathProgramCache]: Analyzing trace with hash 189291141, now seen corresponding path program 8 times [2023-01-27 21:53:27,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:53:27,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994441966] [2023-01-27 21:53:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:53:27,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:53:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:53:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:53:27,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:53:27,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994441966] [2023-01-27 21:53:27,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994441966] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:53:27,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735357554] [2023-01-27 21:53:27,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:53:27,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:53:27,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:53:27,855 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 21:53:27,857 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 21:53:27,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:53:27,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:53:27,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-27 21:53:27,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:53:28,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:53:28,183 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 17 treesize of output 15 [2023-01-27 21:53:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:28,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:53:28,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:53:28,271 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 23 treesize of output 16 [2023-01-27 21:53:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:28,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735357554] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:53:28,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:53:28,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-01-27 21:53:28,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217724325] [2023-01-27 21:53:28,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:53:28,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 21:53:28,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:53:28,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 21:53:28,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-01-27 21:53:28,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-27 21:53:28,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 1087 transitions, 24851 flow. Second operand has 24 states, 24 states have (on average 81.375) internal successors, (1953), 24 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:28,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:53:28,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-27 21:53:28,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:53:32,826 INFO L130 PetriNetUnfolder]: 8653/13146 cut-off events. [2023-01-27 21:53:32,827 INFO L131 PetriNetUnfolder]: For 269383/269383 co-relation queries the response was YES. [2023-01-27 21:53:32,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121745 conditions, 13146 events. 8653/13146 cut-off events. For 269383/269383 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 81918 event pairs, 2532 based on Foata normal form. 4/13150 useless extension candidates. Maximal degree in co-relation 121414. Up to 12191 conditions per place. [2023-01-27 21:53:32,949 INFO L137 encePairwiseOnDemand]: 257/268 looper letters, 899 selfloop transitions, 342 changer transitions 3/1244 dead transitions. [2023-01-27 21:53:32,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1244 transitions, 29763 flow [2023-01-27 21:53:32,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-27 21:53:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-27 21:53:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2156 transitions. [2023-01-27 21:53:32,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3217910447761194 [2023-01-27 21:53:32,951 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2156 transitions. [2023-01-27 21:53:32,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2156 transitions. [2023-01-27 21:53:32,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:53:32,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2156 transitions. [2023-01-27 21:53:32,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 86.24) internal successors, (2156), 25 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 21:53:32,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 268.0) internal successors, (6968), 26 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:32,956 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 268.0) internal successors, (6968), 26 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:32,956 INFO L175 Difference]: Start difference. First operand has 305 places, 1087 transitions, 24851 flow. Second operand 25 states and 2156 transitions. [2023-01-27 21:53:32,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1244 transitions, 29763 flow [2023-01-27 21:53:34,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1244 transitions, 29009 flow, removed 238 selfloop flow, removed 6 redundant places. [2023-01-27 21:53:34,576 INFO L231 Difference]: Finished difference. Result has 329 places, 1154 transitions, 26562 flow [2023-01-27 21:53:34,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=24125, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=26562, PETRI_PLACES=329, PETRI_TRANSITIONS=1154} [2023-01-27 21:53:34,577 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 299 predicate places. [2023-01-27 21:53:34,577 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 1154 transitions, 26562 flow [2023-01-27 21:53:34,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 81.375) internal successors, (1953), 24 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:34,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:53:34,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:53:34,582 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 21:53:34,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-27 21:53:34,779 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:53:34,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:53:34,780 INFO L85 PathProgramCache]: Analyzing trace with hash -951678835, now seen corresponding path program 11 times [2023-01-27 21:53:34,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:53:34,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954087142] [2023-01-27 21:53:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:53:34,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:53:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:53:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:35,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:53:35,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954087142] [2023-01-27 21:53:35,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954087142] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:53:35,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889034944] [2023-01-27 21:53:35,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:53:35,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:53:35,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:53:35,069 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 21:53:35,071 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 21:53:35,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:53:35,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:53:35,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-27 21:53:35,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:53:35,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:53:35,340 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 21:53:35,367 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 15 treesize of output 7 [2023-01-27 21:53:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:35,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:53:35,404 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1267 (Array Int Int))) (= c_~res2~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1267) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) c_~res1~0))) is different from false [2023-01-27 21:53:35,410 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1267 (Array Int Int))) (= c_~res2~0 (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1267) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-01-27 21:53:35,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:53:35,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2023-01-27 21:53:35,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-01-27 21:53:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-01-27 21:53:35,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889034944] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:53:35,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:53:35,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-27 21:53:35,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376787622] [2023-01-27 21:53:35,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:53:35,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:53:35,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:53:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:53:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=242, Unknown=2, NotChecked=66, Total=380 [2023-01-27 21:53:35,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-01-27 21:53:35,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 1154 transitions, 26562 flow. Second operand has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:35,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:53:35,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-01-27 21:53:35,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:53:38,974 INFO L130 PetriNetUnfolder]: 8115/12352 cut-off events. [2023-01-27 21:53:38,974 INFO L131 PetriNetUnfolder]: For 306852/308203 co-relation queries the response was YES. [2023-01-27 21:53:39,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118142 conditions, 12352 events. 8115/12352 cut-off events. For 306852/308203 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 79139 event pairs, 1867 based on Foata normal form. 579/12568 useless extension candidates. Maximal degree in co-relation 117805. Up to 11116 conditions per place. [2023-01-27 21:53:39,115 INFO L137 encePairwiseOnDemand]: 261/268 looper letters, 848 selfloop transitions, 319 changer transitions 1/1195 dead transitions. [2023-01-27 21:53:39,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1195 transitions, 29484 flow [2023-01-27 21:53:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:53:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:53:39,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 739 transitions. [2023-01-27 21:53:39,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39392324093816633 [2023-01-27 21:53:39,116 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 739 transitions. [2023-01-27 21:53:39,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 739 transitions. [2023-01-27 21:53:39,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:53:39,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 739 transitions. [2023-01-27 21:53:39,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.57142857142857) internal successors, (739), 7 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:39,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:53:39,118 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:53:39,119 INFO L175 Difference]: Start difference. First operand has 329 places, 1154 transitions, 26562 flow. Second operand 7 states and 739 transitions. [2023-01-27 21:53:39,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1195 transitions, 29484 flow [2023-01-27 21:53:40,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1195 transitions, 29173 flow, removed 124 selfloop flow, removed 4 redundant places. [2023-01-27 21:53:40,648 INFO L231 Difference]: Finished difference. Result has 333 places, 1166 transitions, 27343 flow [2023-01-27 21:53:40,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=26251, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=27343, PETRI_PLACES=333, PETRI_TRANSITIONS=1166} [2023-01-27 21:53:40,649 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 303 predicate places. [2023-01-27 21:53:40,649 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 1166 transitions, 27343 flow [2023-01-27 21:53:40,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:40,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:53:40,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:53:40,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-01-27 21:53:40,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:53:40,851 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:53:40,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:53:40,851 INFO L85 PathProgramCache]: Analyzing trace with hash 343345935, now seen corresponding path program 12 times [2023-01-27 21:53:40,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:53:40,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780253362] [2023-01-27 21:53:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:53:40,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:53:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:53:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:41,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:53:41,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780253362] [2023-01-27 21:53:41,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780253362] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:53:41,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946349921] [2023-01-27 21:53:41,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:53:41,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:53:41,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:53:41,212 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 21:53:41,212 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 21:53:41,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:53:41,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:53:41,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-27 21:53:41,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:53:41,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:53:41,450 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 21:53:41,458 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 15 treesize of output 7 [2023-01-27 21:53:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:41,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:53:41,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:53:41,520 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 54 treesize of output 38 [2023-01-27 21:53:41,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-01-27 21:53:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:41,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946349921] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:53:41,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:53:41,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-27 21:53:41,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406392806] [2023-01-27 21:53:41,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:53:41,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:53:41,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:53:41,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:53:41,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=293, Unknown=2, NotChecked=0, Total=380 [2023-01-27 21:53:41,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-01-27 21:53:41,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 1166 transitions, 27343 flow. Second operand has 20 states, 20 states have (on average 97.25) internal successors, (1945), 20 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:41,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:53:41,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-01-27 21:53:41,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:53:45,137 INFO L130 PetriNetUnfolder]: 8228/12523 cut-off events. [2023-01-27 21:53:45,137 INFO L131 PetriNetUnfolder]: For 328845/330297 co-relation queries the response was YES. [2023-01-27 21:53:45,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120890 conditions, 12523 events. 8228/12523 cut-off events. For 328845/330297 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 80367 event pairs, 2069 based on Foata normal form. 576/12732 useless extension candidates. Maximal degree in co-relation 120550. Up to 11548 conditions per place. [2023-01-27 21:53:45,264 INFO L137 encePairwiseOnDemand]: 261/268 looper letters, 888 selfloop transitions, 293 changer transitions 1/1209 dead transitions. [2023-01-27 21:53:45,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1209 transitions, 30402 flow [2023-01-27 21:53:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:53:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:53:45,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 738 transitions. [2023-01-27 21:53:45,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39339019189765456 [2023-01-27 21:53:45,265 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 738 transitions. [2023-01-27 21:53:45,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 738 transitions. [2023-01-27 21:53:45,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:53:45,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 738 transitions. [2023-01-27 21:53:45,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.42857142857143) internal successors, (738), 7 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:45,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:53:45,267 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:53:45,267 INFO L175 Difference]: Start difference. First operand has 333 places, 1166 transitions, 27343 flow. Second operand 7 states and 738 transitions. [2023-01-27 21:53:45,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1209 transitions, 30402 flow [2023-01-27 21:53:47,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1209 transitions, 29759 flow, removed 73 selfloop flow, removed 3 redundant places. [2023-01-27 21:53:47,032 INFO L231 Difference]: Finished difference. Result has 338 places, 1174 transitions, 27641 flow [2023-01-27 21:53:47,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=26703, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=873, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=27641, PETRI_PLACES=338, PETRI_TRANSITIONS=1174} [2023-01-27 21:53:47,033 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 308 predicate places. [2023-01-27 21:53:47,033 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 1174 transitions, 27641 flow [2023-01-27 21:53:47,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.25) internal successors, (1945), 20 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:47,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:53:47,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:53:47,037 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 21:53:47,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:53:47,237 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:53:47,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:53:47,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1131852009, now seen corresponding path program 13 times [2023-01-27 21:53:47,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:53:47,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039226950] [2023-01-27 21:53:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:53:47,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:53:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:53:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:47,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:53:47,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039226950] [2023-01-27 21:53:47,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039226950] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:53:47,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105841245] [2023-01-27 21:53:47,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:53:47,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:53:47,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:53:47,473 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 21:53:47,475 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 21:53:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:53:47,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-27 21:53:47,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:53:47,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:53:47,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:53:47,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:53:47,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:53:47,793 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 21:53:47,825 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 15 treesize of output 7 [2023-01-27 21:53:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:53:47,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:53:47,955 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1361 (Array Int Int)) (v_ArrVal_1360 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1360))) (= (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1361) c_~A~0.base) c_~A~0.offset)) (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~res1~0)))) is different from false [2023-01-27 21:53:47,964 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1359 (Array Int Int)) (v_ArrVal_1361 (Array Int Int)) (v_ArrVal_1360 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1359) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1360))) (= (+ c_~res1~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1361) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2023-01-27 21:53:47,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:53:47,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 43 [2023-01-27 21:53:47,982 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 1278 treesize of output 1198 [2023-01-27 21:53:47,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 116 [2023-01-27 21:53:47,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 112 [2023-01-27 21:53:48,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 54 [2023-01-27 21:53:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-01-27 21:53:48,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105841245] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:53:48,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:53:48,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2023-01-27 21:53:48,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627619046] [2023-01-27 21:53:48,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:53:48,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 21:53:48,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:53:48,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 21:53:48,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=363, Unknown=10, NotChecked=82, Total=552 [2023-01-27 21:53:48,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-01-27 21:53:48,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 1174 transitions, 27641 flow. Second operand has 24 states, 24 states have (on average 86.08333333333333) internal successors, (2066), 24 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:48,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:53:48,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-01-27 21:53:48,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:53:48,485 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~res2~0 c_~res1~0) (forall ((v_ArrVal_1361 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1361) c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0)))) is different from false [2023-01-27 21:53:52,069 INFO L130 PetriNetUnfolder]: 8419/12821 cut-off events. [2023-01-27 21:53:52,070 INFO L131 PetriNetUnfolder]: For 343373/344926 co-relation queries the response was YES. [2023-01-27 21:53:52,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123364 conditions, 12821 events. 8419/12821 cut-off events. For 343373/344926 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 82786 event pairs, 2109 based on Foata normal form. 626/13073 useless extension candidates. Maximal degree in co-relation 123022. Up to 11335 conditions per place. [2023-01-27 21:53:52,209 INFO L137 encePairwiseOnDemand]: 251/268 looper letters, 861 selfloop transitions, 360 changer transitions 1/1249 dead transitions. [2023-01-27 21:53:52,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 1249 transitions, 31310 flow [2023-01-27 21:53:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 21:53:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 21:53:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 932 transitions. [2023-01-27 21:53:52,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34776119402985073 [2023-01-27 21:53:52,211 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 932 transitions. [2023-01-27 21:53:52,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 932 transitions. [2023-01-27 21:53:52,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:53:52,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 932 transitions. [2023-01-27 21:53:52,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 93.2) internal successors, (932), 10 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:52,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:52,213 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:52,213 INFO L175 Difference]: Start difference. First operand has 338 places, 1174 transitions, 27641 flow. Second operand 10 states and 932 transitions. [2023-01-27 21:53:52,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 1249 transitions, 31310 flow [2023-01-27 21:53:53,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1249 transitions, 30643 flow, removed 73 selfloop flow, removed 4 redundant places. [2023-01-27 21:53:53,910 INFO L231 Difference]: Finished difference. Result has 346 places, 1203 transitions, 28535 flow [2023-01-27 21:53:53,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=26974, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=28535, PETRI_PLACES=346, PETRI_TRANSITIONS=1203} [2023-01-27 21:53:53,911 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 316 predicate places. [2023-01-27 21:53:53,911 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 1203 transitions, 28535 flow [2023-01-27 21:53:53,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.08333333333333) internal successors, (2066), 24 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:53,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:53:53,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:53:53,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-01-27 21:53:54,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:53:54,112 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:53:54,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:53:54,112 INFO L85 PathProgramCache]: Analyzing trace with hash -73017635, now seen corresponding path program 14 times [2023-01-27 21:53:54,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:53:54,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533600520] [2023-01-27 21:53:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:53:54,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:53:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:53:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:54,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:53:54,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533600520] [2023-01-27 21:53:54,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533600520] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:53:54,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926009000] [2023-01-27 21:53:54,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:53:54,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:53:54,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:53:54,370 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 21:53:54,370 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 21:53:54,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:53:54,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:53:54,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-27 21:53:54,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:53:54,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:53:54,612 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 21:53:54,631 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 22 treesize of output 10 [2023-01-27 21:53:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:54,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:53:54,675 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1406) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset))) c_~res1~0)) is different from false [2023-01-27 21:53:54,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:53:54,694 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 54 treesize of output 38 [2023-01-27 21:53:54,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-01-27 21:53:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:53:54,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926009000] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:53:54,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:53:54,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-27 21:53:54,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481225119] [2023-01-27 21:53:54,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:53:54,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:53:54,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:53:54,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:53:54,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=261, Unknown=1, NotChecked=34, Total=380 [2023-01-27 21:53:54,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-01-27 21:53:54,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 1203 transitions, 28535 flow. Second operand has 20 states, 20 states have (on average 97.15) internal successors, (1943), 20 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:54,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:53:54,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-01-27 21:53:54,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:53:58,545 INFO L130 PetriNetUnfolder]: 8482/12928 cut-off events. [2023-01-27 21:53:58,545 INFO L131 PetriNetUnfolder]: For 360608/362303 co-relation queries the response was YES. [2023-01-27 21:53:58,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129541 conditions, 12928 events. 8482/12928 cut-off events. For 360608/362303 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 83692 event pairs, 2102 based on Foata normal form. 652/13205 useless extension candidates. Maximal degree in co-relation 129190. Up to 11258 conditions per place. [2023-01-27 21:53:58,675 INFO L137 encePairwiseOnDemand]: 261/268 looper letters, 868 selfloop transitions, 358 changer transitions 1/1254 dead transitions. [2023-01-27 21:53:58,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1254 transitions, 31863 flow [2023-01-27 21:53:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:53:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:53:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 743 transitions. [2023-01-27 21:53:58,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39605543710021324 [2023-01-27 21:53:58,676 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 743 transitions. [2023-01-27 21:53:58,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 743 transitions. [2023-01-27 21:53:58,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:53:58,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 743 transitions. [2023-01-27 21:53:58,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.14285714285714) internal successors, (743), 7 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:53:58,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:53:58,678 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:53:58,678 INFO L175 Difference]: Start difference. First operand has 346 places, 1203 transitions, 28535 flow. Second operand 7 states and 743 transitions. [2023-01-27 21:53:58,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1254 transitions, 31863 flow [2023-01-27 21:54:00,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 1254 transitions, 31245 flow, removed 180 selfloop flow, removed 4 redundant places. [2023-01-27 21:54:00,694 INFO L231 Difference]: Finished difference. Result has 349 places, 1208 transitions, 28925 flow [2023-01-27 21:54:00,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=27917, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=845, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=28925, PETRI_PLACES=349, PETRI_TRANSITIONS=1208} [2023-01-27 21:54:00,695 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 319 predicate places. [2023-01-27 21:54:00,695 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 1208 transitions, 28925 flow [2023-01-27 21:54:00,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.15) internal successors, (1943), 20 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:00,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:54:00,695 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:54:00,701 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 21:54:00,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:54:00,896 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:54:00,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:54:00,896 INFO L85 PathProgramCache]: Analyzing trace with hash 864792561, now seen corresponding path program 9 times [2023-01-27 21:54:00,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:54:00,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112767412] [2023-01-27 21:54:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:54:00,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:54:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:54:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:00,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:54:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112767412] [2023-01-27 21:54:00,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112767412] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:54:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245537860] [2023-01-27 21:54:00,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:54:00,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:54:00,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:54:00,967 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 21:54:00,969 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 21:54:01,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:54:01,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:54:01,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:54:01,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:54:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:01,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:54:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:01,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245537860] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:54:01,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:54:01,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-27 21:54:01,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864064065] [2023-01-27 21:54:01,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:54:01,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 21:54:01,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:54:01,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 21:54:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-01-27 21:54:01,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-01-27 21:54:01,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 1208 transitions, 28925 flow. Second operand has 14 states, 14 states have (on average 106.35714285714286) internal successors, (1489), 14 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:01,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:54:01,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-01-27 21:54:01,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:54:04,986 INFO L130 PetriNetUnfolder]: 8886/13439 cut-off events. [2023-01-27 21:54:04,986 INFO L131 PetriNetUnfolder]: For 440386/442989 co-relation queries the response was YES. [2023-01-27 21:54:05,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138429 conditions, 13439 events. 8886/13439 cut-off events. For 440386/442989 co-relation queries the response was YES. Maximal size of possible extension queue 981. Compared 88036 event pairs, 2758 based on Foata normal form. 1453/14254 useless extension candidates. Maximal degree in co-relation 137912. Up to 9170 conditions per place. [2023-01-27 21:54:05,130 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 1175 selfloop transitions, 208 changer transitions 0/1465 dead transitions. [2023-01-27 21:54:05,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1465 transitions, 36565 flow [2023-01-27 21:54:05,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:54:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:54:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 793 transitions. [2023-01-27 21:54:05,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4227078891257996 [2023-01-27 21:54:05,131 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 793 transitions. [2023-01-27 21:54:05,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 793 transitions. [2023-01-27 21:54:05,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:54:05,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 793 transitions. [2023-01-27 21:54:05,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.28571428571429) internal successors, (793), 7 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:05,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:54:05,133 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 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 21:54:05,133 INFO L175 Difference]: Start difference. First operand has 349 places, 1208 transitions, 28925 flow. Second operand 7 states and 793 transitions. [2023-01-27 21:54:05,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1465 transitions, 36565 flow [2023-01-27 21:54:06,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 1465 transitions, 35526 flow, removed 241 selfloop flow, removed 4 redundant places. [2023-01-27 21:54:06,973 INFO L231 Difference]: Finished difference. Result has 353 places, 1273 transitions, 30238 flow [2023-01-27 21:54:06,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=28053, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=999, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=30238, PETRI_PLACES=353, PETRI_TRANSITIONS=1273} [2023-01-27 21:54:06,974 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 323 predicate places. [2023-01-27 21:54:06,974 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1273 transitions, 30238 flow [2023-01-27 21:54:06,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 106.35714285714286) internal successors, (1489), 14 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:06,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:54:06,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:54:06,979 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 21:54:07,175 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,SelfDestructingSolverStorable33 [2023-01-27 21:54:07,175 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:54:07,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:54:07,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1798800132, now seen corresponding path program 15 times [2023-01-27 21:54:07,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:54:07,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565168215] [2023-01-27 21:54:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:54:07,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:54:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:54:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:07,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:54:07,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565168215] [2023-01-27 21:54:07,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565168215] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:54:07,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459024622] [2023-01-27 21:54:07,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:54:07,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:54:07,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:54:07,238 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 21:54:07,240 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 21:54:07,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:54:07,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:54:07,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:54:07,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:54:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:07,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:54:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:07,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459024622] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:54:07,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:54:07,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-27 21:54:07,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500289138] [2023-01-27 21:54:07,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:54:07,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 21:54:07,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:54:07,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 21:54:07,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-27 21:54:07,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-01-27 21:54:07,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1273 transitions, 30238 flow. Second operand has 14 states, 14 states have (on average 106.57142857142857) internal successors, (1492), 14 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:07,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:54:07,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-01-27 21:54:07,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:54:11,237 INFO L130 PetriNetUnfolder]: 7649/11988 cut-off events. [2023-01-27 21:54:11,237 INFO L131 PetriNetUnfolder]: For 408379/410777 co-relation queries the response was YES. [2023-01-27 21:54:11,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122876 conditions, 11988 events. 7649/11988 cut-off events. For 408379/410777 co-relation queries the response was YES. Maximal size of possible extension queue 916. Compared 82453 event pairs, 2029 based on Foata normal form. 1608/13025 useless extension candidates. Maximal degree in co-relation 122548. Up to 6507 conditions per place. [2023-01-27 21:54:11,375 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 1121 selfloop transitions, 129 changer transitions 6/1338 dead transitions. [2023-01-27 21:54:11,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1338 transitions, 33873 flow [2023-01-27 21:54:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:54:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:54:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 904 transitions. [2023-01-27 21:54:11,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216417910447761 [2023-01-27 21:54:11,377 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 904 transitions. [2023-01-27 21:54:11,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 904 transitions. [2023-01-27 21:54:11,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:54:11,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 904 transitions. [2023-01-27 21:54:11,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.0) internal successors, (904), 8 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:11,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:11,379 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:11,379 INFO L175 Difference]: Start difference. First operand has 353 places, 1273 transitions, 30238 flow. Second operand 8 states and 904 transitions. [2023-01-27 21:54:11,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1338 transitions, 33873 flow [2023-01-27 21:54:12,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 1338 transitions, 33427 flow, removed 155 selfloop flow, removed 7 redundant places. [2023-01-27 21:54:12,910 INFO L231 Difference]: Finished difference. Result has 350 places, 1126 transitions, 27503 flow [2023-01-27 21:54:12,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=27255, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=27503, PETRI_PLACES=350, PETRI_TRANSITIONS=1126} [2023-01-27 21:54:12,911 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 320 predicate places. [2023-01-27 21:54:12,912 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 1126 transitions, 27503 flow [2023-01-27 21:54:12,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 106.57142857142857) internal successors, (1492), 14 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:12,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:54:12,912 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:54:12,917 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 21:54:13,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:54:13,117 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:54:13,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:54:13,117 INFO L85 PathProgramCache]: Analyzing trace with hash -307380696, now seen corresponding path program 16 times [2023-01-27 21:54:13,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:54:13,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064249141] [2023-01-27 21:54:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:54:13,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:54:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:54:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:54:13,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:54:13,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064249141] [2023-01-27 21:54:13,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064249141] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:54:13,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941215381] [2023-01-27 21:54:13,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:54:13,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:54:13,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:54:13,330 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 21:54:13,330 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 21:54:13,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:54:13,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:54:13,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 21:54:13,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:54:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:54:13,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:54:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:54:13,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941215381] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:54:13,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:54:13,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-01-27 21:54:13,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962062612] [2023-01-27 21:54:13,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:54:13,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:54:13,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:54:13,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:54:13,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:54:13,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 268 [2023-01-27 21:54:13,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 1126 transitions, 27503 flow. Second operand has 15 states, 15 states have (on average 101.8) internal successors, (1527), 15 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:13,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:54:13,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 268 [2023-01-27 21:54:13,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:54:17,439 INFO L130 PetriNetUnfolder]: 7710/12323 cut-off events. [2023-01-27 21:54:17,440 INFO L131 PetriNetUnfolder]: For 331307/331452 co-relation queries the response was YES. [2023-01-27 21:54:17,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121590 conditions, 12323 events. 7710/12323 cut-off events. For 331307/331452 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 84660 event pairs, 1582 based on Foata normal form. 722/13027 useless extension candidates. Maximal degree in co-relation 121262. Up to 5049 conditions per place. [2023-01-27 21:54:17,569 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 1108 selfloop transitions, 155 changer transitions 140/1451 dead transitions. [2023-01-27 21:54:17,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1451 transitions, 35319 flow [2023-01-27 21:54:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 21:54:17,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 21:54:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 983 transitions. [2023-01-27 21:54:17,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40754560530679934 [2023-01-27 21:54:17,576 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 983 transitions. [2023-01-27 21:54:17,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 983 transitions. [2023-01-27 21:54:17,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:54:17,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 983 transitions. [2023-01-27 21:54:17,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 109.22222222222223) internal successors, (983), 9 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:17,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:17,579 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:17,579 INFO L175 Difference]: Start difference. First operand has 350 places, 1126 transitions, 27503 flow. Second operand 9 states and 983 transitions. [2023-01-27 21:54:17,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1451 transitions, 35319 flow [2023-01-27 21:54:19,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1451 transitions, 34640 flow, removed 40 selfloop flow, removed 5 redundant places. [2023-01-27 21:54:19,532 INFO L231 Difference]: Finished difference. Result has 357 places, 1011 transitions, 24206 flow [2023-01-27 21:54:19,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=26617, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=958, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=24206, PETRI_PLACES=357, PETRI_TRANSITIONS=1011} [2023-01-27 21:54:19,533 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 327 predicate places. [2023-01-27 21:54:19,533 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 1011 transitions, 24206 flow [2023-01-27 21:54:19,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 101.8) internal successors, (1527), 15 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:19,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:54:19,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:54:19,542 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 21:54:19,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:54:19,739 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:54:19,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:54:19,739 INFO L85 PathProgramCache]: Analyzing trace with hash -447067934, now seen corresponding path program 1 times [2023-01-27 21:54:19,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:54:19,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788301482] [2023-01-27 21:54:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:54:19,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:54:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:54:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:19,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:54:19,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788301482] [2023-01-27 21:54:19,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788301482] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:54:19,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407568010] [2023-01-27 21:54:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:54:19,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:54:19,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:54:19,816 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 21:54:19,818 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 21:54:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:54:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 21:54:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:54:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:20,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:54:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:20,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407568010] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:54:20,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:54:20,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-27 21:54:20,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387095033] [2023-01-27 21:54:20,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:54:20,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 21:54:20,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:54:20,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 21:54:20,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-01-27 21:54:20,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:54:20,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 1011 transitions, 24206 flow. Second operand has 18 states, 18 states have (on average 99.05555555555556) internal successors, (1783), 18 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:20,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:54:20,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:54:20,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:54:24,689 INFO L130 PetriNetUnfolder]: 8580/13890 cut-off events. [2023-01-27 21:54:24,689 INFO L131 PetriNetUnfolder]: For 367949/368064 co-relation queries the response was YES. [2023-01-27 21:54:24,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136296 conditions, 13890 events. 8580/13890 cut-off events. For 367949/368064 co-relation queries the response was YES. Maximal size of possible extension queue 922. Compared 99175 event pairs, 540 based on Foata normal form. 274/14154 useless extension candidates. Maximal degree in co-relation 135966. Up to 5622 conditions per place. [2023-01-27 21:54:24,859 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 1217 selfloop transitions, 377 changer transitions 63/1705 dead transitions. [2023-01-27 21:54:24,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1705 transitions, 38298 flow [2023-01-27 21:54:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 21:54:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 21:54:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2128 transitions. [2023-01-27 21:54:24,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3970149253731343 [2023-01-27 21:54:24,861 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2128 transitions. [2023-01-27 21:54:24,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2128 transitions. [2023-01-27 21:54:24,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:54:24,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2128 transitions. [2023-01-27 21:54:24,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 106.4) internal successors, (2128), 20 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:24,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:24,865 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:24,866 INFO L175 Difference]: Start difference. First operand has 357 places, 1011 transitions, 24206 flow. Second operand 20 states and 2128 transitions. [2023-01-27 21:54:24,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1705 transitions, 38298 flow [2023-01-27 21:54:27,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1705 transitions, 37866 flow, removed 115 selfloop flow, removed 7 redundant places. [2023-01-27 21:54:27,519 INFO L231 Difference]: Finished difference. Result has 372 places, 1155 transitions, 27478 flow [2023-01-27 21:54:27,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=23793, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=27478, PETRI_PLACES=372, PETRI_TRANSITIONS=1155} [2023-01-27 21:54:27,520 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 342 predicate places. [2023-01-27 21:54:27,520 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 1155 transitions, 27478 flow [2023-01-27 21:54:27,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.05555555555556) internal successors, (1783), 18 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:27,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:54:27,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:54:27,525 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 21:54:27,720 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,SelfDestructingSolverStorable36 [2023-01-27 21:54:27,721 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:54:27,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:54:27,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1528449100, now seen corresponding path program 2 times [2023-01-27 21:54:27,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:54:27,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366037000] [2023-01-27 21:54:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:54:27,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:54:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:54:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:27,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:54:27,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366037000] [2023-01-27 21:54:27,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366037000] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:54:27,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468668866] [2023-01-27 21:54:27,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:54:27,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:54:27,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:54:27,792 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 21:54:27,793 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 21:54:27,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:54:27,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:54:27,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 21:54:27,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:54:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:27,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:54:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:28,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468668866] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:54:28,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:54:28,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-27 21:54:28,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844784231] [2023-01-27 21:54:28,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:54:28,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 21:54:28,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:54:28,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 21:54:28,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-01-27 21:54:28,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:54:28,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 1155 transitions, 27478 flow. Second operand has 17 states, 17 states have (on average 99.29411764705883) internal successors, (1688), 17 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 21:54:28,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:54:28,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:54:28,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:54:32,785 INFO L130 PetriNetUnfolder]: 8767/14285 cut-off events. [2023-01-27 21:54:32,785 INFO L131 PetriNetUnfolder]: For 409566/409709 co-relation queries the response was YES. [2023-01-27 21:54:32,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146758 conditions, 14285 events. 8767/14285 cut-off events. For 409566/409709 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 103835 event pairs, 640 based on Foata normal form. 294/14563 useless extension candidates. Maximal degree in co-relation 146425. Up to 5881 conditions per place. [2023-01-27 21:54:32,926 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 1272 selfloop transitions, 288 changer transitions 50/1658 dead transitions. [2023-01-27 21:54:32,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1658 transitions, 37851 flow [2023-01-27 21:54:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 21:54:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 21:54:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2141 transitions. [2023-01-27 21:54:32,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994402985074627 [2023-01-27 21:54:32,928 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2141 transitions. [2023-01-27 21:54:32,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2141 transitions. [2023-01-27 21:54:32,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:54:32,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2141 transitions. [2023-01-27 21:54:32,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 107.05) internal successors, (2141), 20 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:32,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:32,933 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:32,933 INFO L175 Difference]: Start difference. First operand has 372 places, 1155 transitions, 27478 flow. Second operand 20 states and 2141 transitions. [2023-01-27 21:54:32,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1658 transitions, 37851 flow [2023-01-27 21:54:36,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1658 transitions, 37335 flow, removed 153 selfloop flow, removed 10 redundant places. [2023-01-27 21:54:36,071 INFO L231 Difference]: Finished difference. Result has 387 places, 1163 transitions, 27754 flow [2023-01-27 21:54:36,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=26767, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=876, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=27754, PETRI_PLACES=387, PETRI_TRANSITIONS=1163} [2023-01-27 21:54:36,071 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 357 predicate places. [2023-01-27 21:54:36,071 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1163 transitions, 27754 flow [2023-01-27 21:54:36,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 99.29411764705883) internal successors, (1688), 17 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 21:54:36,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:54:36,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:54:36,077 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 21:54:36,272 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,SelfDestructingSolverStorable37 [2023-01-27 21:54:36,272 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:54:36,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:54:36,273 INFO L85 PathProgramCache]: Analyzing trace with hash -311675914, now seen corresponding path program 3 times [2023-01-27 21:54:36,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:54:36,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502176042] [2023-01-27 21:54:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:54:36,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:54:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:54:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:36,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:54:36,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502176042] [2023-01-27 21:54:36,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502176042] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:54:36,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362723472] [2023-01-27 21:54:36,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:54:36,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:54:36,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:54:36,348 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 21:54:36,372 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 21:54:36,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:54:36,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:54:36,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 21:54:36,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:54:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:36,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:54:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:36,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362723472] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:54:36,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:54:36,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 21:54:36,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656332060] [2023-01-27 21:54:36,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:54:36,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 21:54:36,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:54:36,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 21:54:36,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-01-27 21:54:36,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:54:36,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1163 transitions, 27754 flow. Second operand has 16 states, 16 states have (on average 99.3125) internal successors, (1589), 16 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:36,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:54:36,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:54:36,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:54:41,277 INFO L130 PetriNetUnfolder]: 8502/13925 cut-off events. [2023-01-27 21:54:41,277 INFO L131 PetriNetUnfolder]: For 364603/364762 co-relation queries the response was YES. [2023-01-27 21:54:41,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139176 conditions, 13925 events. 8502/13925 cut-off events. For 364603/364762 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 101122 event pairs, 684 based on Foata normal form. 476/14384 useless extension candidates. Maximal degree in co-relation 138859. Up to 5211 conditions per place. [2023-01-27 21:54:41,422 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 1161 selfloop transitions, 302 changer transitions 46/1555 dead transitions. [2023-01-27 21:54:41,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1555 transitions, 36366 flow [2023-01-27 21:54:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 21:54:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 21:54:41,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1484 transitions. [2023-01-27 21:54:41,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39552238805970147 [2023-01-27 21:54:41,423 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1484 transitions. [2023-01-27 21:54:41,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1484 transitions. [2023-01-27 21:54:41,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:54:41,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1484 transitions. [2023-01-27 21:54:41,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 106.0) internal successors, (1484), 14 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:41,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:41,427 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:41,427 INFO L175 Difference]: Start difference. First operand has 387 places, 1163 transitions, 27754 flow. Second operand 14 states and 1484 transitions. [2023-01-27 21:54:41,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1555 transitions, 36366 flow [2023-01-27 21:54:44,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1555 transitions, 35790 flow, removed 228 selfloop flow, removed 6 redundant places. [2023-01-27 21:54:44,134 INFO L231 Difference]: Finished difference. Result has 397 places, 1139 transitions, 27625 flow [2023-01-27 21:54:44,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=26266, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=842, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=27625, PETRI_PLACES=397, PETRI_TRANSITIONS=1139} [2023-01-27 21:54:44,135 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 367 predicate places. [2023-01-27 21:54:44,135 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1139 transitions, 27625 flow [2023-01-27 21:54:44,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 99.3125) internal successors, (1589), 16 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:44,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:54:44,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:54:44,140 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 21:54:44,340 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,SelfDestructingSolverStorable38 [2023-01-27 21:54:44,340 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:54:44,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:54:44,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1696058592, now seen corresponding path program 4 times [2023-01-27 21:54:44,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:54:44,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106550659] [2023-01-27 21:54:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:54:44,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:54:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:54:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:44,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:54:44,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106550659] [2023-01-27 21:54:44,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106550659] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:54:44,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786452505] [2023-01-27 21:54:44,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:54:44,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:54:44,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:54:44,408 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 21:54:44,408 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 21:54:44,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:54:44,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:54:44,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 21:54:44,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:54:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:44,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:54:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:44,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786452505] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:54:44,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:54:44,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-27 21:54:44,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088283341] [2023-01-27 21:54:44,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:54:44,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 21:54:44,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:54:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 21:54:44,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-01-27 21:54:44,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:54:44,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1139 transitions, 27625 flow. Second operand has 17 states, 17 states have (on average 99.29411764705883) internal successors, (1688), 17 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 21:54:44,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:54:44,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:54:44,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:54:49,524 INFO L130 PetriNetUnfolder]: 8378/13848 cut-off events. [2023-01-27 21:54:49,524 INFO L131 PetriNetUnfolder]: For 370075/370232 co-relation queries the response was YES. [2023-01-27 21:54:49,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140313 conditions, 13848 events. 8378/13848 cut-off events. For 370075/370232 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 102307 event pairs, 753 based on Foata normal form. 266/14091 useless extension candidates. Maximal degree in co-relation 139993. Up to 5203 conditions per place. [2023-01-27 21:54:49,669 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 1203 selfloop transitions, 215 changer transitions 27/1490 dead transitions. [2023-01-27 21:54:49,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1490 transitions, 35143 flow [2023-01-27 21:54:49,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 21:54:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 21:54:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1497 transitions. [2023-01-27 21:54:49,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39898720682302774 [2023-01-27 21:54:49,671 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1497 transitions. [2023-01-27 21:54:49,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1497 transitions. [2023-01-27 21:54:49,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:54:49,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1497 transitions. [2023-01-27 21:54:49,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 106.92857142857143) internal successors, (1497), 14 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:49,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:49,674 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:49,674 INFO L175 Difference]: Start difference. First operand has 397 places, 1139 transitions, 27625 flow. Second operand 14 states and 1497 transitions. [2023-01-27 21:54:49,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1490 transitions, 35143 flow [2023-01-27 21:54:52,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 1490 transitions, 34939 flow, removed 32 selfloop flow, removed 4 redundant places. [2023-01-27 21:54:52,329 INFO L231 Difference]: Finished difference. Result has 408 places, 1099 transitions, 26823 flow [2023-01-27 21:54:52,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=26774, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=899, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=26823, PETRI_PLACES=408, PETRI_TRANSITIONS=1099} [2023-01-27 21:54:52,330 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 378 predicate places. [2023-01-27 21:54:52,330 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 1099 transitions, 26823 flow [2023-01-27 21:54:52,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 99.29411764705883) internal successors, (1688), 17 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 21:54:52,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:54:52,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:54:52,335 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 21:54:52,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-27 21:54:52,535 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:54:52,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:54:52,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1545233168, now seen corresponding path program 5 times [2023-01-27 21:54:52,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:54:52,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664498493] [2023-01-27 21:54:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:54:52,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:54:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:54:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:52,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:54:52,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664498493] [2023-01-27 21:54:52,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664498493] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:54:52,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591696697] [2023-01-27 21:54:52,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:54:52,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:54:52,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:54:52,610 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 21:54:52,611 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 21:54:52,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:54:52,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:54:52,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 21:54:52,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:54:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:52,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:54:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:54:52,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591696697] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:54:52,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:54:52,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-27 21:54:52,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771782651] [2023-01-27 21:54:52,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:54:52,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 21:54:52,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:54:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 21:54:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-01-27 21:54:52,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:54:52,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 1099 transitions, 26823 flow. Second operand has 18 states, 18 states have (on average 99.05555555555556) internal successors, (1783), 18 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:52,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:54:52,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:54:52,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:54:57,447 INFO L130 PetriNetUnfolder]: 8200/13566 cut-off events. [2023-01-27 21:54:57,447 INFO L131 PetriNetUnfolder]: For 381503/381646 co-relation queries the response was YES. [2023-01-27 21:54:57,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137276 conditions, 13566 events. 8200/13566 cut-off events. For 381503/381646 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 99511 event pairs, 680 based on Foata normal form. 308/13859 useless extension candidates. Maximal degree in co-relation 136953. Up to 5054 conditions per place. [2023-01-27 21:54:57,603 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 1192 selfloop transitions, 185 changer transitions 44/1464 dead transitions. [2023-01-27 21:54:57,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 1464 transitions, 34392 flow [2023-01-27 21:54:57,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 21:54:57,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 21:54:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1481 transitions. [2023-01-27 21:54:57,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3947228144989339 [2023-01-27 21:54:57,605 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1481 transitions. [2023-01-27 21:54:57,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1481 transitions. [2023-01-27 21:54:57,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:54:57,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1481 transitions. [2023-01-27 21:54:57,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 105.78571428571429) internal successors, (1481), 14 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:57,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:57,608 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:54:57,608 INFO L175 Difference]: Start difference. First operand has 408 places, 1099 transitions, 26823 flow. Second operand 14 states and 1481 transitions. [2023-01-27 21:54:57,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 1464 transitions, 34392 flow [2023-01-27 21:55:00,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1464 transitions, 34180 flow, removed 17 selfloop flow, removed 8 redundant places. [2023-01-27 21:55:00,367 INFO L231 Difference]: Finished difference. Result has 412 places, 1048 transitions, 25563 flow [2023-01-27 21:55:00,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=25175, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=25563, PETRI_PLACES=412, PETRI_TRANSITIONS=1048} [2023-01-27 21:55:00,367 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 382 predicate places. [2023-01-27 21:55:00,368 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1048 transitions, 25563 flow [2023-01-27 21:55:00,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.05555555555556) internal successors, (1783), 18 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:00,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:55:00,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:55:00,374 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 21:55:00,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:00,568 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:55:00,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:55:00,569 INFO L85 PathProgramCache]: Analyzing trace with hash 179321848, now seen corresponding path program 6 times [2023-01-27 21:55:00,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:55:00,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889151504] [2023-01-27 21:55:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:55:00,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:55:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:55:00,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:55:00,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889151504] [2023-01-27 21:55:00,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889151504] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:55:00,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723493714] [2023-01-27 21:55:00,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:55:00,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:00,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:55:00,643 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 21:55:00,644 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 21:55:00,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:55:00,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:55:00,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 21:55:00,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:55:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:55:00,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:55:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:55:00,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723493714] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:55:00,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:55:00,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 21:55:00,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701388089] [2023-01-27 21:55:00,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:55:00,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 21:55:00,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:55:00,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 21:55:00,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-01-27 21:55:00,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:55:00,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1048 transitions, 25563 flow. Second operand has 16 states, 16 states have (on average 99.9375) internal successors, (1599), 16 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:00,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:55:00,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:55:00,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:55:04,765 INFO L130 PetriNetUnfolder]: 7147/11847 cut-off events. [2023-01-27 21:55:04,766 INFO L131 PetriNetUnfolder]: For 371484/371612 co-relation queries the response was YES. [2023-01-27 21:55:04,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126453 conditions, 11847 events. 7147/11847 cut-off events. For 371484/371612 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 85524 event pairs, 1049 based on Foata normal form. 535/12361 useless extension candidates. Maximal degree in co-relation 126130. Up to 4507 conditions per place. [2023-01-27 21:55:04,907 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 968 selfloop transitions, 74 changer transitions 80/1163 dead transitions. [2023-01-27 21:55:04,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 1163 transitions, 28839 flow [2023-01-27 21:55:04,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 21:55:04,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 21:55:04,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1167 transitions. [2023-01-27 21:55:04,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958616010854817 [2023-01-27 21:55:04,909 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1167 transitions. [2023-01-27 21:55:04,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1167 transitions. [2023-01-27 21:55:04,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:55:04,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1167 transitions. [2023-01-27 21:55:04,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 106.0909090909091) internal successors, (1167), 11 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:04,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:04,912 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:04,912 INFO L175 Difference]: Start difference. First operand has 412 places, 1048 transitions, 25563 flow. Second operand 11 states and 1167 transitions. [2023-01-27 21:55:04,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 1163 transitions, 28839 flow [2023-01-27 21:55:07,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1163 transitions, 28034 flow, removed 151 selfloop flow, removed 13 redundant places. [2023-01-27 21:55:07,297 INFO L231 Difference]: Finished difference. Result has 405 places, 944 transitions, 22925 flow [2023-01-27 21:55:07,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=23718, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=986, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=912, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=22925, PETRI_PLACES=405, PETRI_TRANSITIONS=944} [2023-01-27 21:55:07,298 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 375 predicate places. [2023-01-27 21:55:07,298 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 944 transitions, 22925 flow [2023-01-27 21:55:07,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 99.9375) internal successors, (1599), 16 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:07,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:55:07,298 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:55:07,305 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 21:55:07,499 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,SelfDestructingSolverStorable41 [2023-01-27 21:55:07,499 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:55:07,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:55:07,499 INFO L85 PathProgramCache]: Analyzing trace with hash 794192120, now seen corresponding path program 10 times [2023-01-27 21:55:07,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:55:07,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312795359] [2023-01-27 21:55:07,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:55:07,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:55:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:55:07,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:55:07,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312795359] [2023-01-27 21:55:07,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312795359] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:55:07,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202920396] [2023-01-27 21:55:07,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:55:07,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:07,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:55:07,573 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 21:55:07,574 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 21:55:07,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:55:07,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:55:07,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 21:55:07,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:55:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:55:07,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:55:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:55:07,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202920396] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:55:07,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:55:07,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-27 21:55:07,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106098820] [2023-01-27 21:55:07,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:55:07,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 21:55:07,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:55:07,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 21:55:07,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-01-27 21:55:07,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 268 [2023-01-27 21:55:07,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 944 transitions, 22925 flow. Second operand has 14 states, 14 states have (on average 103.0) internal successors, (1442), 14 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:07,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:55:07,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 268 [2023-01-27 21:55:07,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:55:10,036 INFO L130 PetriNetUnfolder]: 4367/7035 cut-off events. [2023-01-27 21:55:10,037 INFO L131 PetriNetUnfolder]: For 262887/263244 co-relation queries the response was YES. [2023-01-27 21:55:10,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85530 conditions, 7035 events. 4367/7035 cut-off events. For 262887/263244 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 45329 event pairs, 666 based on Foata normal form. 599/7576 useless extension candidates. Maximal degree in co-relation 85374. Up to 2858 conditions per place. [2023-01-27 21:55:10,111 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 641 selfloop transitions, 34 changer transitions 228/959 dead transitions. [2023-01-27 21:55:10,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 959 transitions, 24748 flow [2023-01-27 21:55:10,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:55:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:55:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 866 transitions. [2023-01-27 21:55:10,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039179104477612 [2023-01-27 21:55:10,112 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 866 transitions. [2023-01-27 21:55:10,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 866 transitions. [2023-01-27 21:55:10,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:55:10,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 866 transitions. [2023-01-27 21:55:10,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 108.25) internal successors, (866), 8 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:10,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:10,114 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:10,114 INFO L175 Difference]: Start difference. First operand has 405 places, 944 transitions, 22925 flow. Second operand 8 states and 866 transitions. [2023-01-27 21:55:10,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 959 transitions, 24748 flow [2023-01-27 21:55:11,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 959 transitions, 24046 flow, removed 131 selfloop flow, removed 21 redundant places. [2023-01-27 21:55:11,241 INFO L231 Difference]: Finished difference. Result has 359 places, 661 transitions, 15518 flow [2023-01-27 21:55:11,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=21044, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15518, PETRI_PLACES=359, PETRI_TRANSITIONS=661} [2023-01-27 21:55:11,242 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 329 predicate places. [2023-01-27 21:55:11,242 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 661 transitions, 15518 flow [2023-01-27 21:55:11,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 103.0) internal successors, (1442), 14 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:11,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:55:11,242 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:55:11,247 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 21:55:11,443 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,SelfDestructingSolverStorable42 [2023-01-27 21:55:11,443 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:55:11,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:55:11,443 INFO L85 PathProgramCache]: Analyzing trace with hash 517966924, now seen corresponding path program 17 times [2023-01-27 21:55:11,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:55:11,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103351075] [2023-01-27 21:55:11,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:55:11,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:55:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:55:11,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:55:11,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103351075] [2023-01-27 21:55:11,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103351075] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:55:11,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905713641] [2023-01-27 21:55:11,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:55:11,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:11,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:55:11,520 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 21:55:11,521 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 21:55:11,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:55:11,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:55:11,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:55:11,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:55:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:11,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:55:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:11,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905713641] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:55:11,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:55:11,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-01-27 21:55:11,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105534290] [2023-01-27 21:55:11,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:55:11,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 21:55:11,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:55:11,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 21:55:11,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-01-27 21:55:11,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 268 [2023-01-27 21:55:11,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 661 transitions, 15518 flow. Second operand has 17 states, 17 states have (on average 96.88235294117646) internal successors, (1647), 17 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:11,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:55:11,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 268 [2023-01-27 21:55:11,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:55:14,119 INFO L130 PetriNetUnfolder]: 4436/6726 cut-off events. [2023-01-27 21:55:14,119 INFO L131 PetriNetUnfolder]: For 246930/246930 co-relation queries the response was YES. [2023-01-27 21:55:14,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80826 conditions, 6726 events. 4436/6726 cut-off events. For 246930/246930 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 37737 event pairs, 174 based on Foata normal form. 82/6808 useless extension candidates. Maximal degree in co-relation 80700. Up to 2562 conditions per place. [2023-01-27 21:55:14,199 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 572 selfloop transitions, 610 changer transitions 0/1182 dead transitions. [2023-01-27 21:55:14,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1182 transitions, 27960 flow [2023-01-27 21:55:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 21:55:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 21:55:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3156 transitions. [2023-01-27 21:55:14,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37987481945113144 [2023-01-27 21:55:14,202 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3156 transitions. [2023-01-27 21:55:14,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3156 transitions. [2023-01-27 21:55:14,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:55:14,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3156 transitions. [2023-01-27 21:55:14,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 101.80645161290323) internal successors, (3156), 31 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:14,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 268.0) internal successors, (8576), 32 states have internal predecessors, (8576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:14,208 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 268.0) internal successors, (8576), 32 states have internal predecessors, (8576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:14,208 INFO L175 Difference]: Start difference. First operand has 359 places, 661 transitions, 15518 flow. Second operand 31 states and 3156 transitions. [2023-01-27 21:55:14,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1182 transitions, 27960 flow [2023-01-27 21:55:15,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 1182 transitions, 26811 flow, removed 165 selfloop flow, removed 26 redundant places. [2023-01-27 21:55:15,144 INFO L231 Difference]: Finished difference. Result has 313 places, 868 transitions, 21029 flow [2023-01-27 21:55:15,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=14904, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=21029, PETRI_PLACES=313, PETRI_TRANSITIONS=868} [2023-01-27 21:55:15,145 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2023-01-27 21:55:15,145 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 868 transitions, 21029 flow [2023-01-27 21:55:15,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 96.88235294117646) internal successors, (1647), 17 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:15,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:55:15,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:55:15,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-01-27 21:55:15,349 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,SelfDestructingSolverStorable43 [2023-01-27 21:55:15,350 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:55:15,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:55:15,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1753839264, now seen corresponding path program 11 times [2023-01-27 21:55:15,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:55:15,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324233605] [2023-01-27 21:55:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:55:15,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:55:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:15,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:55:15,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324233605] [2023-01-27 21:55:15,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324233605] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:55:15,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482150233] [2023-01-27 21:55:15,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:55:15,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:15,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:55:15,432 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 21:55:15,433 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 21:55:15,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:55:15,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:55:15,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:55:15,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:55:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:15,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:55:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:15,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482150233] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:55:15,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:55:15,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-01-27 21:55:15,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785001351] [2023-01-27 21:55:15,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:55:15,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:55:15,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:55:15,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:55:15,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-01-27 21:55:15,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:55:15,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 868 transitions, 21029 flow. Second operand has 20 states, 20 states have (on average 99.1) internal successors, (1982), 20 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:15,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:55:15,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:55:15,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:55:18,483 INFO L130 PetriNetUnfolder]: 5505/8395 cut-off events. [2023-01-27 21:55:18,484 INFO L131 PetriNetUnfolder]: For 337141/337245 co-relation queries the response was YES. [2023-01-27 21:55:18,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106636 conditions, 8395 events. 5505/8395 cut-off events. For 337141/337245 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 48834 event pairs, 482 based on Foata normal form. 99/8486 useless extension candidates. Maximal degree in co-relation 106514. Up to 3201 conditions per place. [2023-01-27 21:55:18,585 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 830 selfloop transitions, 377 changer transitions 0/1247 dead transitions. [2023-01-27 21:55:18,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1247 transitions, 31211 flow [2023-01-27 21:55:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 21:55:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 21:55:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1910 transitions. [2023-01-27 21:55:18,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3959369817578773 [2023-01-27 21:55:18,588 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1910 transitions. [2023-01-27 21:55:18,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1910 transitions. [2023-01-27 21:55:18,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:55:18,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1910 transitions. [2023-01-27 21:55:18,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 106.11111111111111) internal successors, (1910), 18 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:18,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 268.0) internal successors, (5092), 19 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:18,592 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 268.0) internal successors, (5092), 19 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:18,592 INFO L175 Difference]: Start difference. First operand has 313 places, 868 transitions, 21029 flow. Second operand 18 states and 1910 transitions. [2023-01-27 21:55:18,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1247 transitions, 31211 flow [2023-01-27 21:55:19,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1247 transitions, 29409 flow, removed 491 selfloop flow, removed 13 redundant places. [2023-01-27 21:55:19,791 INFO L231 Difference]: Finished difference. Result has 322 places, 931 transitions, 22309 flow [2023-01-27 21:55:19,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=19575, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=22309, PETRI_PLACES=322, PETRI_TRANSITIONS=931} [2023-01-27 21:55:19,791 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2023-01-27 21:55:19,792 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 931 transitions, 22309 flow [2023-01-27 21:55:19,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 99.1) internal successors, (1982), 20 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:19,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:55:19,792 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:55:19,796 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 21:55:19,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:19,992 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:55:19,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:55:19,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2058973118, now seen corresponding path program 18 times [2023-01-27 21:55:19,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:55:19,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15630816] [2023-01-27 21:55:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:55:19,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:55:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:20,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:55:20,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15630816] [2023-01-27 21:55:20,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15630816] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:55:20,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872909557] [2023-01-27 21:55:20,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:55:20,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:20,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:55:20,068 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 21:55:20,069 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 21:55:20,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:55:20,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:55:20,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:55:20,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:55:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:20,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:55:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:20,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872909557] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:55:20,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:55:20,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-27 21:55:20,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170944629] [2023-01-27 21:55:20,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:55:20,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 21:55:20,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:55:20,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 21:55:20,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-01-27 21:55:20,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:55:20,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 931 transitions, 22309 flow. Second operand has 18 states, 18 states have (on average 99.22222222222223) internal successors, (1786), 18 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:20,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:55:20,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:55:20,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:55:22,814 INFO L130 PetriNetUnfolder]: 5406/8218 cut-off events. [2023-01-27 21:55:22,815 INFO L131 PetriNetUnfolder]: For 337441/337541 co-relation queries the response was YES. [2023-01-27 21:55:22,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104560 conditions, 8218 events. 5406/8218 cut-off events. For 337441/337541 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 47335 event pairs, 520 based on Foata normal form. 104/8322 useless extension candidates. Maximal degree in co-relation 104435. Up to 3107 conditions per place. [2023-01-27 21:55:22,914 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 706 selfloop transitions, 406 changer transitions 0/1152 dead transitions. [2023-01-27 21:55:22,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1152 transitions, 28820 flow [2023-01-27 21:55:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 21:55:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 21:55:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1161 transitions. [2023-01-27 21:55:22,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39382632293080055 [2023-01-27 21:55:22,915 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1161 transitions. [2023-01-27 21:55:22,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1161 transitions. [2023-01-27 21:55:22,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:55:22,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1161 transitions. [2023-01-27 21:55:22,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 105.54545454545455) internal successors, (1161), 11 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:22,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:22,918 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:22,918 INFO L175 Difference]: Start difference. First operand has 322 places, 931 transitions, 22309 flow. Second operand 11 states and 1161 transitions. [2023-01-27 21:55:22,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1152 transitions, 28820 flow [2023-01-27 21:55:24,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1152 transitions, 27701 flow, removed 373 selfloop flow, removed 7 redundant places. [2023-01-27 21:55:24,439 INFO L231 Difference]: Finished difference. Result has 328 places, 959 transitions, 23236 flow [2023-01-27 21:55:24,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=21377, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=23236, PETRI_PLACES=328, PETRI_TRANSITIONS=959} [2023-01-27 21:55:24,440 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 298 predicate places. [2023-01-27 21:55:24,440 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 959 transitions, 23236 flow [2023-01-27 21:55:24,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.22222222222223) internal successors, (1786), 18 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:24,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:55:24,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:55:24,445 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 21:55:24,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:24,641 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:55:24,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:55:24,641 INFO L85 PathProgramCache]: Analyzing trace with hash 887196386, now seen corresponding path program 12 times [2023-01-27 21:55:24,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:55:24,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77430518] [2023-01-27 21:55:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:55:24,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:55:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:24,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:55:24,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77430518] [2023-01-27 21:55:24,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77430518] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:55:24,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621958316] [2023-01-27 21:55:24,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:55:24,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:24,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:55:24,720 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 21:55:24,722 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 21:55:24,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:55:24,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:55:24,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:55:24,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:55:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:24,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:55:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:25,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621958316] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:55:25,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:55:25,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-27 21:55:25,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353850187] [2023-01-27 21:55:25,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:55:25,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 21:55:25,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:55:25,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 21:55:25,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-01-27 21:55:25,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:55:25,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 959 transitions, 23236 flow. Second operand has 18 states, 18 states have (on average 99.0) internal successors, (1782), 18 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:25,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:55:25,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:55:25,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:55:27,470 INFO L130 PetriNetUnfolder]: 5372/8153 cut-off events. [2023-01-27 21:55:27,470 INFO L131 PetriNetUnfolder]: For 320112/320193 co-relation queries the response was YES. [2023-01-27 21:55:27,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103156 conditions, 8153 events. 5372/8153 cut-off events. For 320112/320193 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 46679 event pairs, 1164 based on Foata normal form. 64/8208 useless extension candidates. Maximal degree in co-relation 103029. Up to 5707 conditions per place. [2023-01-27 21:55:27,559 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 751 selfloop transitions, 237 changer transitions 0/1027 dead transitions. [2023-01-27 21:55:27,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1027 transitions, 26362 flow [2023-01-27 21:55:27,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 21:55:27,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 21:55:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 941 transitions. [2023-01-27 21:55:27,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901326699834162 [2023-01-27 21:55:27,561 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 941 transitions. [2023-01-27 21:55:27,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 941 transitions. [2023-01-27 21:55:27,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:55:27,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 941 transitions. [2023-01-27 21:55:27,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.55555555555556) internal successors, (941), 9 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:27,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:27,563 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:27,563 INFO L175 Difference]: Start difference. First operand has 328 places, 959 transitions, 23236 flow. Second operand 9 states and 941 transitions. [2023-01-27 21:55:27,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1027 transitions, 26362 flow [2023-01-27 21:55:28,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1027 transitions, 25688 flow, removed 207 selfloop flow, removed 6 redundant places. [2023-01-27 21:55:28,973 INFO L231 Difference]: Finished difference. Result has 330 places, 949 transitions, 22901 flow [2023-01-27 21:55:28,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=22373, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22901, PETRI_PLACES=330, PETRI_TRANSITIONS=949} [2023-01-27 21:55:28,974 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 300 predicate places. [2023-01-27 21:55:28,974 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 949 transitions, 22901 flow [2023-01-27 21:55:28,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.0) internal successors, (1782), 18 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:28,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:55:28,974 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:55:28,981 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 21:55:29,176 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,SelfDestructingSolverStorable46 [2023-01-27 21:55:29,177 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:55:29,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:55:29,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1282113470, now seen corresponding path program 19 times [2023-01-27 21:55:29,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:55:29,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695243608] [2023-01-27 21:55:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:55:29,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:55:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:29,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:55:29,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695243608] [2023-01-27 21:55:29,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695243608] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:55:29,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016876102] [2023-01-27 21:55:29,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:55:29,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:29,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:55:29,265 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 21:55:29,267 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 21:55:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:29,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:55:29,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:55:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:29,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:55:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:29,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016876102] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:55:29,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:55:29,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 21:55:29,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170856810] [2023-01-27 21:55:29,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:55:29,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:55:29,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:55:29,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:55:29,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:55:29,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:55:29,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 949 transitions, 22901 flow. Second operand has 19 states, 19 states have (on average 99.10526315789474) internal successors, (1883), 19 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:29,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:55:29,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:55:29,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:55:32,047 INFO L130 PetriNetUnfolder]: 5169/7799 cut-off events. [2023-01-27 21:55:32,048 INFO L131 PetriNetUnfolder]: For 309479/309548 co-relation queries the response was YES. [2023-01-27 21:55:32,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98167 conditions, 7799 events. 5169/7799 cut-off events. For 309479/309548 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 43688 event pairs, 569 based on Foata normal form. 171/7966 useless extension candidates. Maximal degree in co-relation 98039. Up to 2911 conditions per place. [2023-01-27 21:55:32,134 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 595 selfloop transitions, 497 changer transitions 0/1127 dead transitions. [2023-01-27 21:55:32,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1127 transitions, 27840 flow [2023-01-27 21:55:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 21:55:32,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 21:55:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1375 transitions. [2023-01-27 21:55:32,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39466130884041334 [2023-01-27 21:55:32,136 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1375 transitions. [2023-01-27 21:55:32,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1375 transitions. [2023-01-27 21:55:32,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:55:32,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1375 transitions. [2023-01-27 21:55:32,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 105.76923076923077) internal successors, (1375), 13 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:32,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:32,139 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:32,139 INFO L175 Difference]: Start difference. First operand has 330 places, 949 transitions, 22901 flow. Second operand 13 states and 1375 transitions. [2023-01-27 21:55:32,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1127 transitions, 27840 flow [2023-01-27 21:55:33,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1127 transitions, 27204 flow, removed 66 selfloop flow, removed 8 redundant places. [2023-01-27 21:55:33,472 INFO L231 Difference]: Finished difference. Result has 336 places, 951 transitions, 23462 flow [2023-01-27 21:55:33,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=21680, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=23462, PETRI_PLACES=336, PETRI_TRANSITIONS=951} [2023-01-27 21:55:33,473 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 306 predicate places. [2023-01-27 21:55:33,473 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 951 transitions, 23462 flow [2023-01-27 21:55:33,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 99.10526315789474) internal successors, (1883), 19 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:33,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:55:33,473 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:55:33,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-01-27 21:55:33,674 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,SelfDestructingSolverStorable47 [2023-01-27 21:55:33,674 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:55:33,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:55:33,674 INFO L85 PathProgramCache]: Analyzing trace with hash 210769146, now seen corresponding path program 13 times [2023-01-27 21:55:33,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:55:33,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143920799] [2023-01-27 21:55:33,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:55:33,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:55:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:33,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:55:33,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143920799] [2023-01-27 21:55:33,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143920799] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:55:33,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118306682] [2023-01-27 21:55:33,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:55:33,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:33,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:55:33,758 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 21:55:33,759 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 21:55:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:33,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:55:33,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:55:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:33,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:55:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:34,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118306682] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:55:34,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:55:34,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 21:55:34,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692379667] [2023-01-27 21:55:34,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:55:34,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:55:34,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:55:34,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:55:34,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:55:34,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:55:34,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 951 transitions, 23462 flow. Second operand has 19 states, 19 states have (on average 99.05263157894737) internal successors, (1882), 19 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:34,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:55:34,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:55:34,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:55:36,360 INFO L130 PetriNetUnfolder]: 5144/7735 cut-off events. [2023-01-27 21:55:36,360 INFO L131 PetriNetUnfolder]: For 310222/310301 co-relation queries the response was YES. [2023-01-27 21:55:36,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97628 conditions, 7735 events. 5144/7735 cut-off events. For 310222/310301 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 43025 event pairs, 1114 based on Foata normal form. 54/7781 useless extension candidates. Maximal degree in co-relation 97498. Up to 5437 conditions per place. [2023-01-27 21:55:36,573 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 751 selfloop transitions, 237 changer transitions 0/1023 dead transitions. [2023-01-27 21:55:36,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 1023 transitions, 26567 flow [2023-01-27 21:55:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 21:55:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 21:55:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 942 transitions. [2023-01-27 21:55:36,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39054726368159204 [2023-01-27 21:55:36,574 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 942 transitions. [2023-01-27 21:55:36,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 942 transitions. [2023-01-27 21:55:36,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:55:36,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 942 transitions. [2023-01-27 21:55:36,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.66666666666667) internal successors, (942), 9 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:36,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:36,576 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:36,576 INFO L175 Difference]: Start difference. First operand has 336 places, 951 transitions, 23462 flow. Second operand 9 states and 942 transitions. [2023-01-27 21:55:36,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 1023 transitions, 26567 flow [2023-01-27 21:55:37,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1023 transitions, 25730 flow, removed 71 selfloop flow, removed 8 redundant places. [2023-01-27 21:55:37,876 INFO L231 Difference]: Finished difference. Result has 337 places, 951 transitions, 23139 flow [2023-01-27 21:55:37,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=22569, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23139, PETRI_PLACES=337, PETRI_TRANSITIONS=951} [2023-01-27 21:55:37,877 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 307 predicate places. [2023-01-27 21:55:37,877 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 951 transitions, 23139 flow [2023-01-27 21:55:37,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 99.05263157894737) internal successors, (1882), 19 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:37,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:55:37,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:55:37,883 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 21:55:38,078 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,SelfDestructingSolverStorable48 [2023-01-27 21:55:38,078 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:55:38,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:55:38,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1372642600, now seen corresponding path program 14 times [2023-01-27 21:55:38,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:55:38,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691107046] [2023-01-27 21:55:38,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:55:38,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:55:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:38,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:55:38,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691107046] [2023-01-27 21:55:38,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691107046] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:55:38,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664012250] [2023-01-27 21:55:38,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:55:38,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:38,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:55:38,158 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 21:55:38,159 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 21:55:38,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:55:38,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:55:38,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:55:38,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:55:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:38,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:55:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:38,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664012250] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:55:38,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:55:38,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 21:55:38,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895728168] [2023-01-27 21:55:38,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:55:38,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:55:38,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:55:38,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:55:38,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:55:38,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:55:38,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 951 transitions, 23139 flow. Second operand has 19 states, 19 states have (on average 99.05263157894737) internal successors, (1882), 19 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:38,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:55:38,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:55:38,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:55:40,857 INFO L130 PetriNetUnfolder]: 5114/7707 cut-off events. [2023-01-27 21:55:40,857 INFO L131 PetriNetUnfolder]: For 301816/301887 co-relation queries the response was YES. [2023-01-27 21:55:40,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96426 conditions, 7707 events. 5114/7707 cut-off events. For 301816/301887 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42987 event pairs, 598 based on Foata normal form. 55/7755 useless extension candidates. Maximal degree in co-relation 96295. Up to 2892 conditions per place. [2023-01-27 21:55:40,946 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 797 selfloop transitions, 332 changer transitions 0/1164 dead transitions. [2023-01-27 21:55:40,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 1164 transitions, 29582 flow [2023-01-27 21:55:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 21:55:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 21:55:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1153 transitions. [2023-01-27 21:55:40,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39111261872455905 [2023-01-27 21:55:40,947 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1153 transitions. [2023-01-27 21:55:40,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1153 transitions. [2023-01-27 21:55:40,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:55:40,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1153 transitions. [2023-01-27 21:55:40,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 104.81818181818181) internal successors, (1153), 11 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:40,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:40,950 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:40,950 INFO L175 Difference]: Start difference. First operand has 337 places, 951 transitions, 23139 flow. Second operand 11 states and 1153 transitions. [2023-01-27 21:55:40,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 1164 transitions, 29582 flow [2023-01-27 21:55:42,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1164 transitions, 29296 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-01-27 21:55:42,426 INFO L231 Difference]: Finished difference. Result has 342 places, 955 transitions, 23650 flow [2023-01-27 21:55:42,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=22818, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=23650, PETRI_PLACES=342, PETRI_TRANSITIONS=955} [2023-01-27 21:55:42,427 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 312 predicate places. [2023-01-27 21:55:42,427 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 955 transitions, 23650 flow [2023-01-27 21:55:42,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 99.05263157894737) internal successors, (1882), 19 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:42,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:55:42,427 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:55:42,433 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 21:55:42,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:42,628 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:55:42,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:55:42,628 INFO L85 PathProgramCache]: Analyzing trace with hash -687811556, now seen corresponding path program 20 times [2023-01-27 21:55:42,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:55:42,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925814126] [2023-01-27 21:55:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:55:42,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:55:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:42,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:55:42,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925814126] [2023-01-27 21:55:42,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925814126] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:55:42,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478401295] [2023-01-27 21:55:42,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:55:42,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:42,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:55:42,710 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 21:55:42,710 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 21:55:42,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:55:42,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:55:42,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:55:42,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:55:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:42,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:55:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:43,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478401295] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:55:43,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:55:43,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-01-27 21:55:43,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969957070] [2023-01-27 21:55:43,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:55:43,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:55:43,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:55:43,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:55:43,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-01-27 21:55:43,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:55:43,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 955 transitions, 23650 flow. Second operand has 20 states, 20 states have (on average 98.9) internal successors, (1978), 20 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:43,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:55:43,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:55:43,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:55:45,674 INFO L130 PetriNetUnfolder]: 5143/7746 cut-off events. [2023-01-27 21:55:45,674 INFO L131 PetriNetUnfolder]: For 316711/316780 co-relation queries the response was YES. [2023-01-27 21:55:45,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98098 conditions, 7746 events. 5143/7746 cut-off events. For 316711/316780 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 43161 event pairs, 991 based on Foata normal form. 131/7874 useless extension candidates. Maximal degree in co-relation 97966. Up to 4663 conditions per place. [2023-01-27 21:55:45,761 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 783 selfloop transitions, 367 changer transitions 0/1185 dead transitions. [2023-01-27 21:55:45,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1185 transitions, 29836 flow [2023-01-27 21:55:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 21:55:45,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 21:55:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1470 transitions. [2023-01-27 21:55:45,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917910447761194 [2023-01-27 21:55:45,762 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1470 transitions. [2023-01-27 21:55:45,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1470 transitions. [2023-01-27 21:55:45,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:55:45,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1470 transitions. [2023-01-27 21:55:45,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 105.0) internal successors, (1470), 14 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:45,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:45,765 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:45,765 INFO L175 Difference]: Start difference. First operand has 342 places, 955 transitions, 23650 flow. Second operand 14 states and 1470 transitions. [2023-01-27 21:55:45,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1185 transitions, 29836 flow [2023-01-27 21:55:47,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1185 transitions, 29686 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-01-27 21:55:47,050 INFO L231 Difference]: Finished difference. Result has 353 places, 980 transitions, 24970 flow [2023-01-27 21:55:47,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=23440, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=24970, PETRI_PLACES=353, PETRI_TRANSITIONS=980} [2023-01-27 21:55:47,050 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 323 predicate places. [2023-01-27 21:55:47,051 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 980 transitions, 24970 flow [2023-01-27 21:55:47,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 98.9) internal successors, (1978), 20 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:47,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:55:47,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:55:47,058 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 21:55:47,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:47,251 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:55:47,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:55:47,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1404877554, now seen corresponding path program 15 times [2023-01-27 21:55:47,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:55:47,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137603392] [2023-01-27 21:55:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:55:47,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:55:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:47,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:55:47,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137603392] [2023-01-27 21:55:47,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137603392] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:55:47,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780471652] [2023-01-27 21:55:47,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:55:47,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:47,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:55:47,336 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 21:55:47,337 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 21:55:47,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:55:47,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:55:47,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:55:47,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:55:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:47,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:55:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:47,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780471652] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:55:47,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:55:47,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-01-27 21:55:47,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981478508] [2023-01-27 21:55:47,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:55:47,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 21:55:47,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:55:47,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 21:55:47,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-01-27 21:55:47,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:55:47,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 980 transitions, 24970 flow. Second operand has 21 states, 21 states have (on average 98.85714285714286) internal successors, (2076), 21 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:47,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:55:47,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:55:47,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:55:50,305 INFO L130 PetriNetUnfolder]: 5129/7712 cut-off events. [2023-01-27 21:55:50,305 INFO L131 PetriNetUnfolder]: For 315807/315874 co-relation queries the response was YES. [2023-01-27 21:55:50,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98946 conditions, 7712 events. 5129/7712 cut-off events. For 315807/315874 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 42993 event pairs, 491 based on Foata normal form. 51/7758 useless extension candidates. Maximal degree in co-relation 98810. Up to 2851 conditions per place. [2023-01-27 21:55:50,408 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 801 selfloop transitions, 429 changer transitions 0/1265 dead transitions. [2023-01-27 21:55:50,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1265 transitions, 32939 flow [2023-01-27 21:55:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 21:55:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 21:55:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1800 transitions. [2023-01-27 21:55:50,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39508340649692714 [2023-01-27 21:55:50,410 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1800 transitions. [2023-01-27 21:55:50,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1800 transitions. [2023-01-27 21:55:50,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:55:50,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1800 transitions. [2023-01-27 21:55:50,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 105.88235294117646) internal successors, (1800), 17 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:50,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 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 21:55:50,413 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 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 21:55:50,413 INFO L175 Difference]: Start difference. First operand has 353 places, 980 transitions, 24970 flow. Second operand 17 states and 1800 transitions. [2023-01-27 21:55:50,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1265 transitions, 32939 flow [2023-01-27 21:55:52,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1265 transitions, 32163 flow, removed 43 selfloop flow, removed 9 redundant places. [2023-01-27 21:55:52,049 INFO L231 Difference]: Finished difference. Result has 359 places, 981 transitions, 25095 flow [2023-01-27 21:55:52,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=24142, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=977, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=25095, PETRI_PLACES=359, PETRI_TRANSITIONS=981} [2023-01-27 21:55:52,050 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 329 predicate places. [2023-01-27 21:55:52,050 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 981 transitions, 25095 flow [2023-01-27 21:55:52,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.85714285714286) internal successors, (2076), 21 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:52,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:55:52,050 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:55:52,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-01-27 21:55:52,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:52,256 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:55:52,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:55:52,257 INFO L85 PathProgramCache]: Analyzing trace with hash -932140466, now seen corresponding path program 16 times [2023-01-27 21:55:52,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:55:52,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989528457] [2023-01-27 21:55:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:55:52,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:55:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:52,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:55:52,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989528457] [2023-01-27 21:55:52,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989528457] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:55:52,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826625319] [2023-01-27 21:55:52,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:55:52,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:52,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:55:52,346 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 21:55:52,348 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 21:55:52,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:55:52,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:55:52,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:55:52,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:55:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:52,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:55:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:52,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826625319] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:55:52,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:55:52,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 21:55:52,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017732766] [2023-01-27 21:55:52,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:55:52,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:55:52,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:55:52,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:55:52,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:55:52,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:55:52,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 981 transitions, 25095 flow. Second operand has 19 states, 19 states have (on average 99.05263157894737) internal successors, (1882), 19 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:52,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:55:52,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:55:52,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:55:55,190 INFO L130 PetriNetUnfolder]: 5102/7653 cut-off events. [2023-01-27 21:55:55,191 INFO L131 PetriNetUnfolder]: For 320341/320368 co-relation queries the response was YES. [2023-01-27 21:55:55,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98697 conditions, 7653 events. 5102/7653 cut-off events. For 320341/320368 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 42298 event pairs, 1013 based on Foata normal form. 41/7691 useless extension candidates. Maximal degree in co-relation 98561. Up to 4722 conditions per place. [2023-01-27 21:55:55,296 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 752 selfloop transitions, 298 changer transitions 0/1085 dead transitions. [2023-01-27 21:55:55,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1085 transitions, 28906 flow [2023-01-27 21:55:55,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 21:55:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 21:55:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 938 transitions. [2023-01-27 21:55:55,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-01-27 21:55:55,298 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 938 transitions. [2023-01-27 21:55:55,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 938 transitions. [2023-01-27 21:55:55,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:55:55,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 938 transitions. [2023-01-27 21:55:55,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.22222222222223) internal successors, (938), 9 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:55,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:55,308 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:55,309 INFO L175 Difference]: Start difference. First operand has 359 places, 981 transitions, 25095 flow. Second operand 9 states and 938 transitions. [2023-01-27 21:55:55,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1085 transitions, 28906 flow [2023-01-27 21:55:56,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1085 transitions, 28381 flow, removed 6 selfloop flow, removed 13 redundant places. [2023-01-27 21:55:56,822 INFO L231 Difference]: Finished difference. Result has 355 places, 982 transitions, 25199 flow [2023-01-27 21:55:56,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=24542, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=25199, PETRI_PLACES=355, PETRI_TRANSITIONS=982} [2023-01-27 21:55:56,823 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 325 predicate places. [2023-01-27 21:55:56,823 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 982 transitions, 25199 flow [2023-01-27 21:55:56,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 99.05263157894737) internal successors, (1882), 19 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:56,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:55:56,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:55:56,829 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 21:55:57,025 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,SelfDestructingSolverStorable52 [2023-01-27 21:55:57,025 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:55:57,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:55:57,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1977209790, now seen corresponding path program 21 times [2023-01-27 21:55:57,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:55:57,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845639909] [2023-01-27 21:55:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:55:57,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:55:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:55:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:57,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:55:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845639909] [2023-01-27 21:55:57,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845639909] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:55:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600457642] [2023-01-27 21:55:57,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:55:57,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:55:57,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:55:57,109 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 21:55:57,111 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 21:55:57,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:55:57,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:55:57,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:55:57,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:55:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:57,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:55:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:55:57,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600457642] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:55:57,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:55:57,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-27 21:55:57,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253179987] [2023-01-27 21:55:57,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:55:57,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 21:55:57,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:55:57,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 21:55:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-01-27 21:55:57,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-27 21:55:57,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 982 transitions, 25199 flow. Second operand has 18 states, 18 states have (on average 99.11111111111111) internal successors, (1784), 18 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:57,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:55:57,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-27 21:55:57,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:55:59,715 INFO L130 PetriNetUnfolder]: 5061/7578 cut-off events. [2023-01-27 21:55:59,715 INFO L131 PetriNetUnfolder]: For 317919/317942 co-relation queries the response was YES. [2023-01-27 21:55:59,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97742 conditions, 7578 events. 5061/7578 cut-off events. For 317919/317942 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 41690 event pairs, 1017 based on Foata normal form. 51/7626 useless extension candidates. Maximal degree in co-relation 97606. Up to 4782 conditions per place. [2023-01-27 21:55:59,885 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 806 selfloop transitions, 295 changer transitions 0/1136 dead transitions. [2023-01-27 21:55:59,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1136 transitions, 30111 flow [2023-01-27 21:55:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 21:55:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 21:55:59,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 935 transitions. [2023-01-27 21:55:59,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3876451077943615 [2023-01-27 21:55:59,886 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 935 transitions. [2023-01-27 21:55:59,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 935 transitions. [2023-01-27 21:55:59,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:55:59,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 935 transitions. [2023-01-27 21:55:59,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.88888888888889) internal successors, (935), 9 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:59,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:59,888 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:55:59,889 INFO L175 Difference]: Start difference. First operand has 355 places, 982 transitions, 25199 flow. Second operand 9 states and 935 transitions. [2023-01-27 21:55:59,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1136 transitions, 30111 flow [2023-01-27 21:56:01,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1136 transitions, 29529 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-01-27 21:56:01,249 INFO L231 Difference]: Finished difference. Result has 357 places, 994 transitions, 25561 flow [2023-01-27 21:56:01,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=24554, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=979, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=25561, PETRI_PLACES=357, PETRI_TRANSITIONS=994} [2023-01-27 21:56:01,249 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 327 predicate places. [2023-01-27 21:56:01,249 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 994 transitions, 25561 flow [2023-01-27 21:56:01,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.11111111111111) internal successors, (1784), 18 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:01,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:01,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:56:01,257 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 21:56:01,450 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,SelfDestructingSolverStorable53 [2023-01-27 21:56:01,450 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:56:01,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:01,451 INFO L85 PathProgramCache]: Analyzing trace with hash 905128863, now seen corresponding path program 7 times [2023-01-27 21:56:01,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:01,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78966670] [2023-01-27 21:56:01,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:01,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:56:01,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:01,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78966670] [2023-01-27 21:56:01,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78966670] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:56:01,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413479390] [2023-01-27 21:56:01,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:56:01,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:56:01,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:56:01,965 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 21:56:01,965 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 21:56:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:02,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 85 conjunts are in the unsatisfiable core [2023-01-27 21:56:02,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:56:02,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:56:02,379 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 20 treesize of output 20 [2023-01-27 21:56:02,530 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:56:02,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:56:02,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:56:02,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2023-01-27 21:56:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:56:02,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:56:02,838 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-27 21:56:02,838 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 72 [2023-01-27 21:56:02,845 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 21:56:02,845 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 21 treesize of output 13 [2023-01-27 21:56:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:56:03,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413479390] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:56:03,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:56:03,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-01-27 21:56:03,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868487798] [2023-01-27 21:56:03,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:56:03,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-27 21:56:03,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:03,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-27 21:56:03,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1114, Unknown=5, NotChecked=0, Total=1260 [2023-01-27 21:56:03,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 268 [2023-01-27 21:56:03,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 994 transitions, 25561 flow. Second operand has 36 states, 36 states have (on average 76.72222222222223) internal successors, (2762), 36 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:03,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:03,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 268 [2023-01-27 21:56:03,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:06,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:56:10,501 INFO L130 PetriNetUnfolder]: 7006/10442 cut-off events. [2023-01-27 21:56:10,502 INFO L131 PetriNetUnfolder]: For 465016/465016 co-relation queries the response was YES. [2023-01-27 21:56:10,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139152 conditions, 10442 events. 7006/10442 cut-off events. For 465016/465016 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 59794 event pairs, 347 based on Foata normal form. 3/10445 useless extension candidates. Maximal degree in co-relation 139015. Up to 7055 conditions per place. [2023-01-27 21:56:10,631 INFO L137 encePairwiseOnDemand]: 254/268 looper letters, 898 selfloop transitions, 695 changer transitions 4/1597 dead transitions. [2023-01-27 21:56:10,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1597 transitions, 45394 flow [2023-01-27 21:56:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 21:56:10,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 21:56:10,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2205 transitions. [2023-01-27 21:56:10,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31644661308840416 [2023-01-27 21:56:10,633 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2205 transitions. [2023-01-27 21:56:10,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2205 transitions. [2023-01-27 21:56:10,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:10,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2205 transitions. [2023-01-27 21:56:10,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 84.8076923076923) internal successors, (2205), 26 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:10,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 268.0) internal successors, (7236), 27 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:10,638 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 268.0) internal successors, (7236), 27 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:10,638 INFO L175 Difference]: Start difference. First operand has 357 places, 994 transitions, 25561 flow. Second operand 26 states and 2205 transitions. [2023-01-27 21:56:10,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1597 transitions, 45394 flow [2023-01-27 21:56:13,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1597 transitions, 44880 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-27 21:56:13,348 INFO L231 Difference]: Finished difference. Result has 391 places, 1374 transitions, 40976 flow [2023-01-27 21:56:13,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=25253, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=40976, PETRI_PLACES=391, PETRI_TRANSITIONS=1374} [2023-01-27 21:56:13,349 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 361 predicate places. [2023-01-27 21:56:13,349 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 1374 transitions, 40976 flow [2023-01-27 21:56:13,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 76.72222222222223) internal successors, (2762), 36 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:13,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:13,350 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:56:13,355 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 21:56:13,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:56:13,550 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:56:13,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:13,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1974027715, now seen corresponding path program 8 times [2023-01-27 21:56:13,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:13,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56174288] [2023-01-27 21:56:13,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:13,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:56:14,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:14,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56174288] [2023-01-27 21:56:14,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56174288] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:56:14,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713368391] [2023-01-27 21:56:14,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:56:14,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:56:14,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:56:14,105 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 21:56:14,109 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 21:56:14,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:56:14,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:56:14,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2023-01-27 21:56:14,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:56:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:56:14,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:56:14,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-01-27 21:56:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:56:14,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:56:14,811 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-27 21:56:14,811 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 38 treesize of output 46 [2023-01-27 21:56:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:56:14,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713368391] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:56:14,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:56:14,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 26 [2023-01-27 21:56:14,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851013321] [2023-01-27 21:56:14,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:56:14,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 21:56:14,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:14,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 21:56:14,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-01-27 21:56:14,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-27 21:56:14,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1374 transitions, 40976 flow. Second operand has 28 states, 28 states have (on average 81.21428571428571) internal successors, (2274), 28 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:14,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:14,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-27 21:56:14,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:21,307 INFO L130 PetriNetUnfolder]: 8768/13434 cut-off events. [2023-01-27 21:56:21,308 INFO L131 PetriNetUnfolder]: For 712196/712196 co-relation queries the response was YES. [2023-01-27 21:56:21,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182782 conditions, 13434 events. 8768/13434 cut-off events. For 712196/712196 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 84184 event pairs, 884 based on Foata normal form. 1/13435 useless extension candidates. Maximal degree in co-relation 182631. Up to 9217 conditions per place. [2023-01-27 21:56:21,493 INFO L137 encePairwiseOnDemand]: 254/268 looper letters, 998 selfloop transitions, 836 changer transitions 1/1835 dead transitions. [2023-01-27 21:56:21,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1835 transitions, 55732 flow [2023-01-27 21:56:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 21:56:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 21:56:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2293 transitions. [2023-01-27 21:56:21,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32907577497129736 [2023-01-27 21:56:21,494 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2293 transitions. [2023-01-27 21:56:21,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2293 transitions. [2023-01-27 21:56:21,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:21,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2293 transitions. [2023-01-27 21:56:21,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 88.1923076923077) internal successors, (2293), 26 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:21,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 268.0) internal successors, (7236), 27 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:21,499 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 268.0) internal successors, (7236), 27 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:21,499 INFO L175 Difference]: Start difference. First operand has 391 places, 1374 transitions, 40976 flow. Second operand 26 states and 2293 transitions. [2023-01-27 21:56:21,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1835 transitions, 55732 flow [2023-01-27 21:56:26,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 1835 transitions, 52634 flow, removed 1547 selfloop flow, removed 2 redundant places. [2023-01-27 21:56:27,017 INFO L231 Difference]: Finished difference. Result has 423 places, 1673 transitions, 48863 flow [2023-01-27 21:56:27,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=39072, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=48863, PETRI_PLACES=423, PETRI_TRANSITIONS=1673} [2023-01-27 21:56:27,018 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 393 predicate places. [2023-01-27 21:56:27,018 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 1673 transitions, 48863 flow [2023-01-27 21:56:27,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 81.21428571428571) internal successors, (2274), 28 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:27,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:27,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:56:27,024 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 21:56:27,219 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,SelfDestructingSolverStorable55 [2023-01-27 21:56:27,219 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:56:27,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:27,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2121193375, now seen corresponding path program 9 times [2023-01-27 21:56:27,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:27,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252817059] [2023-01-27 21:56:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:27,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:56:27,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:27,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252817059] [2023-01-27 21:56:27,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252817059] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:56:27,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579818582] [2023-01-27 21:56:27,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:56:27,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:56:27,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:56:27,936 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 21:56:27,938 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 21:56:28,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:56:28,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:56:28,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 92 conjunts are in the unsatisfiable core [2023-01-27 21:56:28,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:56:28,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:56:28,418 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 20 treesize of output 20 [2023-01-27 21:56:28,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:56:28,473 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 20 treesize of output 20 [2023-01-27 21:56:28,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:56:28,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 27 [2023-01-27 21:56:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:56:28,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:56:30,958 WARN L839 $PredicateComparison]: unable to prove that (forall ((|thread3Thread1of1ForFork0_~i~2#1| Int) (v_ArrVal_2525 (Array Int Int))) (or (< (+ |thread3Thread1of1ForFork0_~i~2#1| 1) c_~N~0) (<= c_~N~0 |thread3Thread1of1ForFork0_~i~2#1|) (= c_~res1~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2525) c_~A~0.base))) (+ c_~res2~0 (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset (* |thread3Thread1of1ForFork0_~i~2#1| 4)))))))) is different from false [2023-01-27 21:56:30,982 WARN L839 $PredicateComparison]: unable to prove that (forall ((|thread3Thread1of1ForFork0_~i~2#1| Int) (v_ArrVal_2525 (Array Int Int)) (v_ArrVal_2524 (Array Int Int))) (or (< (+ |thread3Thread1of1ForFork0_~i~2#1| 1) c_~N~0) (= c_~res1~0 (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2524) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2525) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |thread3Thread1of1ForFork0_~i~2#1| 4))) c_~res2~0 (select .cse0 c_~A~0.offset)))) (<= c_~N~0 |thread3Thread1of1ForFork0_~i~2#1|))) is different from false [2023-01-27 21:56:33,005 WARN L839 $PredicateComparison]: unable to prove that (forall ((|thread3Thread1of1ForFork0_~i~2#1| Int) (v_ArrVal_2525 (Array Int Int)) (v_ArrVal_2524 (Array Int Int))) (or (< (+ |thread3Thread1of1ForFork0_~i~2#1| 1) c_~N~0) (= (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2524) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2525) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |thread3Thread1of1ForFork0_~i~2#1| 4))) c_~res2~0 (select .cse0 c_~A~0.offset))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) c_~res1~0)) (<= c_~N~0 |thread3Thread1of1ForFork0_~i~2#1|))) is different from false [2023-01-27 21:56:33,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:56:33,037 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 170 treesize of output 134 [2023-01-27 21:56:33,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:56:33,048 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 90 treesize of output 82 [2023-01-27 21:56:33,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:56:33,060 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 40 treesize of output 41 [2023-01-27 21:56:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-01-27 21:56:33,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579818582] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:56:33,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:56:33,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2023-01-27 21:56:33,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258248912] [2023-01-27 21:56:33,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:56:33,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-27 21:56:33,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:33,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-27 21:56:33,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1068, Unknown=3, NotChecked=204, Total=1406 [2023-01-27 21:56:33,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 268 [2023-01-27 21:56:33,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 1673 transitions, 48863 flow. Second operand has 38 states, 38 states have (on average 70.84210526315789) internal successors, (2692), 38 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:33,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:33,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 268 [2023-01-27 21:56:33,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:41,826 INFO L130 PetriNetUnfolder]: 9744/14924 cut-off events. [2023-01-27 21:56:41,826 INFO L131 PetriNetUnfolder]: For 761803/761803 co-relation queries the response was YES. [2023-01-27 21:56:41,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201556 conditions, 14924 events. 9744/14924 cut-off events. For 761803/761803 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 94750 event pairs, 645 based on Foata normal form. 3/14927 useless extension candidates. Maximal degree in co-relation 201395. Up to 11510 conditions per place. [2023-01-27 21:56:42,018 INFO L137 encePairwiseOnDemand]: 256/268 looper letters, 1339 selfloop transitions, 642 changer transitions 1/1982 dead transitions. [2023-01-27 21:56:42,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 1982 transitions, 60758 flow [2023-01-27 21:56:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 21:56:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 21:56:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1632 transitions. [2023-01-27 21:56:42,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2899786780383795 [2023-01-27 21:56:42,019 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1632 transitions. [2023-01-27 21:56:42,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1632 transitions. [2023-01-27 21:56:42,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:42,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1632 transitions. [2023-01-27 21:56:42,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 77.71428571428571) internal successors, (1632), 21 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:42,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 268.0) internal successors, (5896), 22 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:42,023 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 268.0) internal successors, (5896), 22 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:42,023 INFO L175 Difference]: Start difference. First operand has 423 places, 1673 transitions, 48863 flow. Second operand 21 states and 1632 transitions. [2023-01-27 21:56:42,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 1982 transitions, 60758 flow [2023-01-27 21:56:49,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1982 transitions, 58759 flow, removed 886 selfloop flow, removed 6 redundant places. [2023-01-27 21:56:49,602 INFO L231 Difference]: Finished difference. Result has 445 places, 1789 transitions, 53282 flow [2023-01-27 21:56:49,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=47316, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=549, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1065, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=53282, PETRI_PLACES=445, PETRI_TRANSITIONS=1789} [2023-01-27 21:56:49,603 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 415 predicate places. [2023-01-27 21:56:49,603 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1789 transitions, 53282 flow [2023-01-27 21:56:49,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.84210526315789) internal successors, (2692), 38 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:49,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:49,604 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:56:49,609 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 21:56:49,804 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,SelfDestructingSolverStorable56 [2023-01-27 21:56:49,805 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:56:49,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:49,805 INFO L85 PathProgramCache]: Analyzing trace with hash 345320437, now seen corresponding path program 10 times [2023-01-27 21:56:49,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:49,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713407583] [2023-01-27 21:56:49,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:49,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:56:50,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:50,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713407583] [2023-01-27 21:56:50,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713407583] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:56:50,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193478535] [2023-01-27 21:56:50,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:56:50,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:56:50,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:56:50,351 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 21:56:50,351 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 21:56:50,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:56:50,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:56:50,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 83 conjunts are in the unsatisfiable core [2023-01-27 21:56:50,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:56:50,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:56:50,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 27 [2023-01-27 21:56:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:56:50,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:56:51,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:56:51,198 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 38 treesize of output 54 [2023-01-27 21:56:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:56:51,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193478535] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:56:51,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:56:51,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-27 21:56:51,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797808247] [2023-01-27 21:56:51,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:56:51,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 21:56:51,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:51,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 21:56:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2023-01-27 21:56:51,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-27 21:56:51,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1789 transitions, 53282 flow. Second operand has 33 states, 33 states have (on average 81.12121212121212) internal successors, (2677), 33 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:51,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:51,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-27 21:56:51,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:57:01,319 INFO L130 PetriNetUnfolder]: 10962/16789 cut-off events. [2023-01-27 21:57:01,320 INFO L131 PetriNetUnfolder]: For 857301/857301 co-relation queries the response was YES. [2023-01-27 21:57:01,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225029 conditions, 16789 events. 10962/16789 cut-off events. For 857301/857301 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 108659 event pairs, 1121 based on Foata normal form. 4/16793 useless extension candidates. Maximal degree in co-relation 224862. Up to 13991 conditions per place. [2023-01-27 21:57:01,563 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 1605 selfloop transitions, 600 changer transitions 4/2209 dead transitions. [2023-01-27 21:57:01,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 2209 transitions, 66905 flow [2023-01-27 21:57:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 21:57:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 21:57:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2577 transitions. [2023-01-27 21:57:01,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3315748841996912 [2023-01-27 21:57:01,565 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2577 transitions. [2023-01-27 21:57:01,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2577 transitions. [2023-01-27 21:57:01,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:57:01,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2577 transitions. [2023-01-27 21:57:01,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 88.86206896551724) internal successors, (2577), 29 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:01,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 268.0) internal successors, (8040), 30 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:01,570 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 268.0) internal successors, (8040), 30 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:01,570 INFO L175 Difference]: Start difference. First operand has 445 places, 1789 transitions, 53282 flow. Second operand 29 states and 2577 transitions. [2023-01-27 21:57:01,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 2209 transitions, 66905 flow [2023-01-27 21:57:11,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 2209 transitions, 65159 flow, removed 781 selfloop flow, removed 8 redundant places. [2023-01-27 21:57:11,122 INFO L231 Difference]: Finished difference. Result has 481 places, 1996 transitions, 59543 flow [2023-01-27 21:57:11,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=51540, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=59543, PETRI_PLACES=481, PETRI_TRANSITIONS=1996} [2023-01-27 21:57:11,124 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 451 predicate places. [2023-01-27 21:57:11,124 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 1996 transitions, 59543 flow [2023-01-27 21:57:11,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 81.12121212121212) internal successors, (2677), 33 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:11,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:57:11,124 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:57:11,131 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 21:57:11,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:57:11,329 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:57:11,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:57:11,329 INFO L85 PathProgramCache]: Analyzing trace with hash -99943325, now seen corresponding path program 11 times [2023-01-27 21:57:11,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:57:11,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198013334] [2023-01-27 21:57:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:57:11,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:57:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:57:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:57:11,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:57:11,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198013334] [2023-01-27 21:57:11,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198013334] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:57:11,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549815843] [2023-01-27 21:57:11,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:57:11,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:57:11,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:57:11,853 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 21:57:11,855 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 21:57:12,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:57:12,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:57:12,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2023-01-27 21:57:12,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:57:12,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:57:12,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:57:12,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 19 [2023-01-27 21:57:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:57:12,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:57:12,544 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-27 21:57:12,544 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 38 treesize of output 46 [2023-01-27 21:57:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:57:12,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549815843] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:57:12,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:57:12,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 28 [2023-01-27 21:57:12,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756862353] [2023-01-27 21:57:12,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:57:12,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 21:57:12,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:57:12,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 21:57:12,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-01-27 21:57:12,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-27 21:57:12,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 1996 transitions, 59543 flow. Second operand has 30 states, 30 states have (on average 81.23333333333333) internal successors, (2437), 30 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:12,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:57:12,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-27 21:57:12,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:57:26,124 INFO L130 PetriNetUnfolder]: 12780/19745 cut-off events. [2023-01-27 21:57:26,124 INFO L131 PetriNetUnfolder]: For 1008292/1008292 co-relation queries the response was YES. [2023-01-27 21:57:26,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263747 conditions, 19745 events. 12780/19745 cut-off events. For 1008292/1008292 co-relation queries the response was YES. Maximal size of possible extension queue 1083. Compared 134499 event pairs, 1454 based on Foata normal form. 2/19747 useless extension candidates. Maximal degree in co-relation 263564. Up to 13127 conditions per place. [2023-01-27 21:57:26,425 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 1380 selfloop transitions, 1315 changer transitions 1/2696 dead transitions. [2023-01-27 21:57:26,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 2696 transitions, 81513 flow [2023-01-27 21:57:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-01-27 21:57:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-01-27 21:57:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 5870 transitions. [2023-01-27 21:57:26,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3221027216856892 [2023-01-27 21:57:26,429 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 5870 transitions. [2023-01-27 21:57:26,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 5870 transitions. [2023-01-27 21:57:26,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:57:26,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 5870 transitions. [2023-01-27 21:57:26,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 86.32352941176471) internal successors, (5870), 68 states have internal predecessors, (5870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:26,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 268.0) internal successors, (18492), 69 states have internal predecessors, (18492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:26,441 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 268.0) internal successors, (18492), 69 states have internal predecessors, (18492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:26,441 INFO L175 Difference]: Start difference. First operand has 481 places, 1996 transitions, 59543 flow. Second operand 68 states and 5870 transitions. [2023-01-27 21:57:26,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 2696 transitions, 81513 flow [2023-01-27 21:57:38,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 2696 transitions, 79178 flow, removed 1083 selfloop flow, removed 5 redundant places. [2023-01-27 21:57:38,577 INFO L231 Difference]: Finished difference. Result has 562 places, 2401 transitions, 73768 flow [2023-01-27 21:57:38,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=57636, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1996, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=957, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=892, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=73768, PETRI_PLACES=562, PETRI_TRANSITIONS=2401} [2023-01-27 21:57:38,578 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 532 predicate places. [2023-01-27 21:57:38,579 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 2401 transitions, 73768 flow [2023-01-27 21:57:38,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.23333333333333) internal successors, (2437), 30 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:38,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:57:38,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:57:38,584 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 21:57:38,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:57:38,784 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:57:38,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:57:38,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1019010223, now seen corresponding path program 12 times [2023-01-27 21:57:38,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:57:38,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420320561] [2023-01-27 21:57:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:57:38,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:57:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:57:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:57:39,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:57:39,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420320561] [2023-01-27 21:57:39,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420320561] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:57:39,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653128354] [2023-01-27 21:57:39,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:57:39,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:57:39,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:57:39,242 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 21:57:39,243 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 21:57:39,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:57:39,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:57:39,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2023-01-27 21:57:39,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:57:39,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:57:39,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:57:39,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 19 [2023-01-27 21:57:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:57:39,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:57:39,936 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-27 21:57:39,936 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 38 treesize of output 46 [2023-01-27 21:57:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:57:40,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653128354] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:57:40,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:57:40,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 28 [2023-01-27 21:57:40,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313388289] [2023-01-27 21:57:40,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:57:40,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 21:57:40,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:57:40,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 21:57:40,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2023-01-27 21:57:40,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-27 21:57:40,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 2401 transitions, 73768 flow. Second operand has 30 states, 30 states have (on average 81.23333333333333) internal successors, (2437), 30 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:40,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:57:40,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-27 21:57:40,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:57:55,554 INFO L130 PetriNetUnfolder]: 13922/21479 cut-off events. [2023-01-27 21:57:55,554 INFO L131 PetriNetUnfolder]: For 1120161/1120161 co-relation queries the response was YES. [2023-01-27 21:57:55,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292496 conditions, 21479 events. 13922/21479 cut-off events. For 1120161/1120161 co-relation queries the response was YES. Maximal size of possible extension queue 1148. Compared 147477 event pairs, 713 based on Foata normal form. 4/21483 useless extension candidates. Maximal degree in co-relation 292293. Up to 13463 conditions per place. [2023-01-27 21:57:55,873 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 1411 selfloop transitions, 1491 changer transitions 1/2903 dead transitions. [2023-01-27 21:57:55,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 2903 transitions, 89700 flow [2023-01-27 21:57:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-01-27 21:57:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-01-27 21:57:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 5258 transitions. [2023-01-27 21:57:55,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3269900497512438 [2023-01-27 21:57:55,877 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 5258 transitions. [2023-01-27 21:57:55,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 5258 transitions. [2023-01-27 21:57:55,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:57:55,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 5258 transitions. [2023-01-27 21:57:55,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 87.63333333333334) internal successors, (5258), 60 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:55,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 268.0) internal successors, (16348), 61 states have internal predecessors, (16348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:55,887 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 268.0) internal successors, (16348), 61 states have internal predecessors, (16348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:55,887 INFO L175 Difference]: Start difference. First operand has 562 places, 2401 transitions, 73768 flow. Second operand 60 states and 5258 transitions. [2023-01-27 21:57:55,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 2903 transitions, 89700 flow [2023-01-27 21:58:11,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 2903 transitions, 85947 flow, removed 1269 selfloop flow, removed 17 redundant places. [2023-01-27 21:58:11,948 INFO L231 Difference]: Finished difference. Result has 615 places, 2585 transitions, 79635 flow [2023-01-27 21:58:11,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=70049, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1039, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=79635, PETRI_PLACES=615, PETRI_TRANSITIONS=2585} [2023-01-27 21:58:11,949 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 585 predicate places. [2023-01-27 21:58:11,949 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 2585 transitions, 79635 flow [2023-01-27 21:58:11,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.23333333333333) internal successors, (2437), 30 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:11,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:58:11,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:58:11,955 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 21:58:12,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-01-27 21:58:12,155 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:58:12,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:58:12,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1630052095, now seen corresponding path program 17 times [2023-01-27 21:58:12,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:58:12,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157376727] [2023-01-27 21:58:12,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:58:12,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:58:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:58:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:58:12,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:58:12,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157376727] [2023-01-27 21:58:12,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157376727] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:58:12,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624614316] [2023-01-27 21:58:12,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:58:12,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:58:12,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:58:12,764 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 21:58:12,765 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 21:58:12,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:58:12,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:58:12,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 84 conjunts are in the unsatisfiable core [2023-01-27 21:58:12,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:58:13,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:58:13,327 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:58:13,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:58:13,328 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:58:13,332 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:58:13,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 17 [2023-01-27 21:58:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:58:13,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:58:13,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:58:13,538 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 43 treesize of output 46 [2023-01-27 21:58:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:58:13,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624614316] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:58:13,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:58:13,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 32 [2023-01-27 21:58:13,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679765712] [2023-01-27 21:58:13,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:58:13,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-27 21:58:13,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:58:13,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-27 21:58:13,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2023-01-27 21:58:13,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-27 21:58:13,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 2585 transitions, 79635 flow. Second operand has 34 states, 34 states have (on average 81.1470588235294) internal successors, (2759), 34 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:13,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:58:13,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-27 21:58:13,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:58:35,604 INFO L130 PetriNetUnfolder]: 17367/26784 cut-off events. [2023-01-27 21:58:35,604 INFO L131 PetriNetUnfolder]: For 1541436/1541436 co-relation queries the response was YES. [2023-01-27 21:58:35,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377080 conditions, 26784 events. 17367/26784 cut-off events. For 1541436/1541436 co-relation queries the response was YES. Maximal size of possible extension queue 1382. Compared 189438 event pairs, 923 based on Foata normal form. 11/26795 useless extension candidates. Maximal degree in co-relation 376868. Up to 14794 conditions per place. [2023-01-27 21:58:36,120 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 1537 selfloop transitions, 2166 changer transitions 5/3708 dead transitions. [2023-01-27 21:58:36,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 679 places, 3708 transitions, 117367 flow [2023-01-27 21:58:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-01-27 21:58:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-01-27 21:58:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5736 transitions. [2023-01-27 21:58:36,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3292766934557979 [2023-01-27 21:58:36,125 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5736 transitions. [2023-01-27 21:58:36,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5736 transitions. [2023-01-27 21:58:36,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:58:36,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5736 transitions. [2023-01-27 21:58:36,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 88.24615384615385) internal successors, (5736), 65 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:36,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 268.0) internal successors, (17688), 66 states have internal predecessors, (17688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:36,135 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 268.0) internal successors, (17688), 66 states have internal predecessors, (17688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:36,136 INFO L175 Difference]: Start difference. First operand has 615 places, 2585 transitions, 79635 flow. Second operand 65 states and 5736 transitions. [2023-01-27 21:58:36,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 679 places, 3708 transitions, 117367 flow [2023-01-27 21:58:59,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 657 places, 3708 transitions, 113336 flow, removed 1532 selfloop flow, removed 22 redundant places. [2023-01-27 21:58:59,890 INFO L231 Difference]: Finished difference. Result has 679 places, 3210 transitions, 105943 flow [2023-01-27 21:58:59,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=76418, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1595, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=849, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=105943, PETRI_PLACES=679, PETRI_TRANSITIONS=3210} [2023-01-27 21:58:59,892 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 649 predicate places. [2023-01-27 21:58:59,892 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 3210 transitions, 105943 flow [2023-01-27 21:58:59,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 81.1470588235294) internal successors, (2759), 34 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:59,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:58:59,893 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:58:59,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-01-27 21:59:00,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:59:00,097 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:59:00,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:59:00,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1335662557, now seen corresponding path program 22 times [2023-01-27 21:59:00,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:59:00,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933074334] [2023-01-27 21:59:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:59:00,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:59:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:59:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:59:00,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:59:00,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933074334] [2023-01-27 21:59:00,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933074334] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:59:00,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127265170] [2023-01-27 21:59:00,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:59:00,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:59:00,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:59:00,492 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 21:59:00,493 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 21:59:00,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:59:00,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:59:00,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 71 conjunts are in the unsatisfiable core [2023-01-27 21:59:00,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:59:00,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:59:00,818 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 40 treesize of output 16 [2023-01-27 21:59:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:59:00,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:59:00,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:59:00,915 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 36 treesize of output 44 [2023-01-27 21:59:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:59:00,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127265170] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:59:00,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:59:00,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 20 [2023-01-27 21:59:00,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713130131] [2023-01-27 21:59:00,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:59:00,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 21:59:00,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:59:00,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 21:59:00,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-01-27 21:59:00,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-01-27 21:59:00,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 3210 transitions, 105943 flow. Second operand has 22 states, 22 states have (on average 86.5909090909091) internal successors, (1905), 22 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:00,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:59:00,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-01-27 21:59:00,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:59:22,184 INFO L130 PetriNetUnfolder]: 16966/26337 cut-off events. [2023-01-27 21:59:22,184 INFO L131 PetriNetUnfolder]: For 1911025/1913799 co-relation queries the response was YES. [2023-01-27 21:59:22,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391983 conditions, 26337 events. 16966/26337 cut-off events. For 1911025/1913799 co-relation queries the response was YES. Maximal size of possible extension queue 1434. Compared 189746 event pairs, 1689 based on Foata normal form. 1238/27205 useless extension candidates. Maximal degree in co-relation 391749. Up to 21354 conditions per place. [2023-01-27 21:59:22,739 INFO L137 encePairwiseOnDemand]: 257/268 looper letters, 2199 selfloop transitions, 1059 changer transitions 1/3371 dead transitions. [2023-01-27 21:59:22,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 693 places, 3371 transitions, 116631 flow [2023-01-27 21:59:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 21:59:22,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 21:59:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1408 transitions. [2023-01-27 21:59:22,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3502487562189055 [2023-01-27 21:59:22,741 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1408 transitions. [2023-01-27 21:59:22,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1408 transitions. [2023-01-27 21:59:22,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:59:22,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1408 transitions. [2023-01-27 21:59:22,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 93.86666666666666) internal successors, (1408), 15 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:22,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:22,745 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:22,745 INFO L175 Difference]: Start difference. First operand has 679 places, 3210 transitions, 105943 flow. Second operand 15 states and 1408 transitions. [2023-01-27 21:59:22,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 693 places, 3371 transitions, 116631 flow [2023-01-27 21:59:52,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 3371 transitions, 107813 flow, removed 3907 selfloop flow, removed 20 redundant places. [2023-01-27 21:59:52,595 INFO L231 Difference]: Finished difference. Result has 675 places, 3261 transitions, 101582 flow [2023-01-27 21:59:52,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=97145, PETRI_DIFFERENCE_MINUEND_PLACES=659, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1012, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=101582, PETRI_PLACES=675, PETRI_TRANSITIONS=3261} [2023-01-27 21:59:52,597 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 645 predicate places. [2023-01-27 21:59:52,597 INFO L495 AbstractCegarLoop]: Abstraction has has 675 places, 3261 transitions, 101582 flow [2023-01-27 21:59:52,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 86.5909090909091) internal successors, (1905), 22 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:52,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:59:52,598 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:59:52,605 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 21:59:52,801 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,SelfDestructingSolverStorable61 [2023-01-27 21:59:52,801 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 21:59:52,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:59:52,801 INFO L85 PathProgramCache]: Analyzing trace with hash -186039197, now seen corresponding path program 13 times [2023-01-27 21:59:52,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:59:52,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468042219] [2023-01-27 21:59:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:59:52,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:59:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:59:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:59:53,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:59:53,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468042219] [2023-01-27 21:59:53,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468042219] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:59:53,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997927604] [2023-01-27 21:59:53,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:59:53,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:59:53,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:59:53,423 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 21:59:53,424 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 21:59:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:59:53,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 80 conjunts are in the unsatisfiable core [2023-01-27 21:59:53,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:59:53,886 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:59:53,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:59:53,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:59:53,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2023-01-27 21:59:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:59:53,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:59:54,138 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-27 21:59:54,138 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 38 treesize of output 46 [2023-01-27 21:59:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:59:54,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997927604] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:59:54,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:59:54,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2023-01-27 21:59:54,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595146901] [2023-01-27 21:59:54,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:59:54,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-27 21:59:54,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:59:54,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-27 21:59:54,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2023-01-27 21:59:54,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 268 [2023-01-27 21:59:54,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 3261 transitions, 101582 flow. Second operand has 34 states, 34 states have (on average 70.88235294117646) internal successors, (2410), 34 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:54,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:59:54,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 268 [2023-01-27 21:59:54,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:00:19,276 INFO L130 PetriNetUnfolder]: 18876/29137 cut-off events. [2023-01-27 22:00:19,277 INFO L131 PetriNetUnfolder]: For 1717404/1717404 co-relation queries the response was YES. [2023-01-27 22:00:19,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410307 conditions, 29137 events. 18876/29137 cut-off events. For 1717404/1717404 co-relation queries the response was YES. Maximal size of possible extension queue 1490. Compared 209311 event pairs, 2739 based on Foata normal form. 6/29143 useless extension candidates. Maximal degree in co-relation 410073. Up to 22018 conditions per place. [2023-01-27 22:00:20,051 INFO L137 encePairwiseOnDemand]: 255/268 looper letters, 2283 selfloop transitions, 1292 changer transitions 4/3579 dead transitions. [2023-01-27 22:00:20,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 3579 transitions, 117881 flow [2023-01-27 22:00:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 22:00:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 22:00:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2272 transitions. [2023-01-27 22:00:20,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2923314462171899 [2023-01-27 22:00:20,054 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2272 transitions. [2023-01-27 22:00:20,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2272 transitions. [2023-01-27 22:00:20,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:00:20,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2272 transitions. [2023-01-27 22:00:20,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 78.34482758620689) internal successors, (2272), 29 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:00:20,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 268.0) internal successors, (8040), 30 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:00:20,059 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 268.0) internal successors, (8040), 30 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:00:20,059 INFO L175 Difference]: Start difference. First operand has 675 places, 3261 transitions, 101582 flow. Second operand 29 states and 2272 transitions. [2023-01-27 22:00:20,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 3579 transitions, 117881 flow [2023-01-27 22:00:52,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 3579 transitions, 116009 flow, removed 354 selfloop flow, removed 11 redundant places. [2023-01-27 22:00:52,489 INFO L231 Difference]: Finished difference. Result has 701 places, 3383 transitions, 109668 flow [2023-01-27 22:00:52,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=99712, PETRI_DIFFERENCE_MINUEND_PLACES=664, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2043, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=109668, PETRI_PLACES=701, PETRI_TRANSITIONS=3383} [2023-01-27 22:00:52,492 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 671 predicate places. [2023-01-27 22:00:52,492 INFO L495 AbstractCegarLoop]: Abstraction has has 701 places, 3383 transitions, 109668 flow [2023-01-27 22:00:52,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 70.88235294117646) internal successors, (2410), 34 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:00:52,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:00:52,492 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:00:52,498 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 22:00:52,697 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,SelfDestructingSolverStorable62 [2023-01-27 22:00:52,698 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:00:52,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:00:52,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1068339015, now seen corresponding path program 14 times [2023-01-27 22:00:52,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:00:52,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864137519] [2023-01-27 22:00:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:00:52,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:00:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:00:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:00:53,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:00:53,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864137519] [2023-01-27 22:00:53,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864137519] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:00:53,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664013460] [2023-01-27 22:00:53,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:00:53,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:00:53,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:00:53,172 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 22:00:53,172 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 22:00:53,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:00:53,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:00:53,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 83 conjunts are in the unsatisfiable core [2023-01-27 22:00:53,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:00:53,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:00:53,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 27 [2023-01-27 22:00:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:00:53,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:00:54,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:00:54,049 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 38 treesize of output 54 [2023-01-27 22:00:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:00:54,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664013460] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:00:54,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:00:54,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-27 22:00:54,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552955860] [2023-01-27 22:00:54,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:00:54,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 22:00:54,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:00:54,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 22:00:54,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2023-01-27 22:00:54,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-27 22:00:54,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 701 places, 3383 transitions, 109668 flow. Second operand has 33 states, 33 states have (on average 81.24242424242425) internal successors, (2681), 33 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:00:54,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:00:54,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-27 22:00:54,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:01:23,026 INFO L130 PetriNetUnfolder]: 19831/30606 cut-off events. [2023-01-27 22:01:23,027 INFO L131 PetriNetUnfolder]: For 1975151/1975151 co-relation queries the response was YES. [2023-01-27 22:01:23,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446640 conditions, 30606 events. 19831/30606 cut-off events. For 1975151/1975151 co-relation queries the response was YES. Maximal size of possible extension queue 1584. Compared 220735 event pairs, 4214 based on Foata normal form. 4/30610 useless extension candidates. Maximal degree in co-relation 446397. Up to 28598 conditions per place. [2023-01-27 22:01:23,883 INFO L137 encePairwiseOnDemand]: 255/268 looper letters, 3088 selfloop transitions, 580 changer transitions 2/3670 dead transitions. [2023-01-27 22:01:23,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 3670 transitions, 126574 flow [2023-01-27 22:01:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 22:01:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 22:01:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2612 transitions. [2023-01-27 22:01:23,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32487562189054725 [2023-01-27 22:01:23,885 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2612 transitions. [2023-01-27 22:01:23,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2612 transitions. [2023-01-27 22:01:23,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:01:23,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2612 transitions. [2023-01-27 22:01:23,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 87.06666666666666) internal successors, (2612), 30 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:01:23,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 268.0) internal successors, (8308), 31 states have internal predecessors, (8308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:01:23,891 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 268.0) internal successors, (8308), 31 states have internal predecessors, (8308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:01:23,891 INFO L175 Difference]: Start difference. First operand has 701 places, 3383 transitions, 109668 flow. Second operand 30 states and 2612 transitions. [2023-01-27 22:01:23,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 3670 transitions, 126574 flow [2023-01-27 22:02:00,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 3670 transitions, 121948 flow, removed 2110 selfloop flow, removed 11 redundant places. [2023-01-27 22:02:00,335 INFO L231 Difference]: Finished difference. Result has 729 places, 3508 transitions, 113051 flow [2023-01-27 22:02:00,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=106194, PETRI_DIFFERENCE_MINUEND_PLACES=690, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=480, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2874, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=113051, PETRI_PLACES=729, PETRI_TRANSITIONS=3508} [2023-01-27 22:02:00,339 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 699 predicate places. [2023-01-27 22:02:00,339 INFO L495 AbstractCegarLoop]: Abstraction has has 729 places, 3508 transitions, 113051 flow [2023-01-27 22:02:00,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 81.24242424242425) internal successors, (2681), 33 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:02:00,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:02:00,339 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:02:00,345 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 22:02:00,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:02:00,542 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:02:00,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:02:00,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1608299261, now seen corresponding path program 15 times [2023-01-27 22:02:00,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:02:00,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605041163] [2023-01-27 22:02:00,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:02:00,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:02:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:02:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:02:00,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:02:00,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605041163] [2023-01-27 22:02:00,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605041163] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:02:00,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128525780] [2023-01-27 22:02:00,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:02:00,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:02:00,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:02:00,977 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 22:02:00,977 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 22:02:01,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 22:02:01,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:02:01,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2023-01-27 22:02:01,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:02:01,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:02:01,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:02:01,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 19 [2023-01-27 22:02:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:02:01,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:02:01,754 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-27 22:02:01,754 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 38 treesize of output 46 [2023-01-27 22:02:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:02:01,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128525780] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:02:01,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:02:01,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 28 [2023-01-27 22:02:01,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073924164] [2023-01-27 22:02:01,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:02:01,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 22:02:01,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:02:01,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 22:02:01,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2023-01-27 22:02:01,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-27 22:02:01,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 729 places, 3508 transitions, 113051 flow. Second operand has 30 states, 30 states have (on average 81.23333333333333) internal successors, (2437), 30 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:02:01,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:02:01,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-27 22:02:01,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:02:30,355 INFO L130 PetriNetUnfolder]: 20299/31318 cut-off events. [2023-01-27 22:02:30,355 INFO L131 PetriNetUnfolder]: For 1892844/1892844 co-relation queries the response was YES. [2023-01-27 22:02:31,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447580 conditions, 31318 events. 20299/31318 cut-off events. For 1892844/1892844 co-relation queries the response was YES. Maximal size of possible extension queue 1639. Compared 227904 event pairs, 2973 based on Foata normal form. 2/31320 useless extension candidates. Maximal degree in co-relation 447326. Up to 24027 conditions per place. [2023-01-27 22:02:31,298 INFO L137 encePairwiseOnDemand]: 254/268 looper letters, 2366 selfloop transitions, 1445 changer transitions 2/3813 dead transitions. [2023-01-27 22:02:31,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 763 places, 3813 transitions, 127771 flow [2023-01-27 22:02:31,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 22:02:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 22:02:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3092 transitions. [2023-01-27 22:02:31,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32963752665245205 [2023-01-27 22:02:31,301 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3092 transitions. [2023-01-27 22:02:31,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3092 transitions. [2023-01-27 22:02:31,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:02:31,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3092 transitions. [2023-01-27 22:02:31,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 88.34285714285714) internal successors, (3092), 35 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:02:31,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 268.0) internal successors, (9648), 36 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:02:31,307 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 268.0) internal successors, (9648), 36 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:02:31,307 INFO L175 Difference]: Start difference. First operand has 729 places, 3508 transitions, 113051 flow. Second operand 35 states and 3092 transitions. [2023-01-27 22:02:31,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 763 places, 3813 transitions, 127771 flow [2023-01-27 22:03:09,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 752 places, 3813 transitions, 125424 flow, removed 964 selfloop flow, removed 11 redundant places. [2023-01-27 22:03:10,028 INFO L231 Difference]: Finished difference. Result has 759 places, 3608 transitions, 118033 flow [2023-01-27 22:03:10,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=110728, PETRI_DIFFERENCE_MINUEND_PLACES=718, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=118033, PETRI_PLACES=759, PETRI_TRANSITIONS=3608} [2023-01-27 22:03:10,031 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 729 predicate places. [2023-01-27 22:03:10,031 INFO L495 AbstractCegarLoop]: Abstraction has has 759 places, 3608 transitions, 118033 flow [2023-01-27 22:03:10,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.23333333333333) internal successors, (2437), 30 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:03:10,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:03:10,032 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:03:10,037 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 22:03:10,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:03:10,232 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:03:10,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:03:10,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1916472309, now seen corresponding path program 16 times [2023-01-27 22:03:10,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:03:10,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229229093] [2023-01-27 22:03:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:03:10,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:03:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:03:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:03:10,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:03:10,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229229093] [2023-01-27 22:03:10,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229229093] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:03:10,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627089985] [2023-01-27 22:03:10,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:03:10,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:03:10,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:03:10,843 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 22:03:10,845 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 22:03:11,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:03:11,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:03:11,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 88 conjunts are in the unsatisfiable core [2023-01-27 22:03:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:03:11,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:03:11,292 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 20 treesize of output 20 [2023-01-27 22:03:11,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:03:11,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 27 [2023-01-27 22:03:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:03:11,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:03:13,774 WARN L839 $PredicateComparison]: unable to prove that (forall ((|thread3Thread1of1ForFork0_~i~2#1| Int) (v_ArrVal_2958 (Array Int Int))) (or (< (+ |thread3Thread1of1ForFork0_~i~2#1| 1) c_~N~0) (<= c_~N~0 |thread3Thread1of1ForFork0_~i~2#1|) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2958) c_~A~0.base))) (+ c_~res2~0 (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset (* |thread3Thread1of1ForFork0_~i~2#1| 4))))) c_~res1~0))) is different from false [2023-01-27 22:03:15,809 WARN L839 $PredicateComparison]: unable to prove that (forall ((|thread3Thread1of1ForFork0_~i~2#1| Int) (v_ArrVal_2958 (Array Int Int))) (or (< (+ |thread3Thread1of1ForFork0_~i~2#1| 1) c_~N~0) (<= c_~N~0 |thread3Thread1of1ForFork0_~i~2#1|) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2958) c_~A~0.base))) (+ c_~res2~0 (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset (* |thread3Thread1of1ForFork0_~i~2#1| 4))))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) c_~res1~0)))) is different from false [2023-01-27 22:03:15,838 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:03:15,838 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 80 [2023-01-27 22:03:15,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:03:15,847 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 21 treesize of output 22 [2023-01-27 22:03:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-01-27 22:03:16,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627089985] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:03:16,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:03:16,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2023-01-27 22:03:16,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170562901] [2023-01-27 22:03:16,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:03:16,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 22:03:16,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:03:16,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 22:03:16,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=933, Unknown=2, NotChecked=126, Total=1190 [2023-01-27 22:03:16,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 268 [2023-01-27 22:03:16,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 3608 transitions, 118033 flow. Second operand has 35 states, 35 states have (on average 76.97142857142858) internal successors, (2694), 35 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:03:16,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:03:16,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 268 [2023-01-27 22:03:16,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:03:48,722 INFO L130 PetriNetUnfolder]: 22216/34297 cut-off events. [2023-01-27 22:03:48,722 INFO L131 PetriNetUnfolder]: For 2218450/2218450 co-relation queries the response was YES. [2023-01-27 22:03:49,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501076 conditions, 34297 events. 22216/34297 cut-off events. For 2218450/2218450 co-relation queries the response was YES. Maximal size of possible extension queue 1772. Compared 252240 event pairs, 2576 based on Foata normal form. 6/34303 useless extension candidates. Maximal degree in co-relation 500814. Up to 24940 conditions per place. [2023-01-27 22:03:49,950 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 2518 selfloop transitions, 1672 changer transitions 2/4192 dead transitions. [2023-01-27 22:03:49,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 795 places, 4192 transitions, 143106 flow [2023-01-27 22:03:49,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-27 22:03:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-27 22:03:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3153 transitions. [2023-01-27 22:03:49,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3179709560306575 [2023-01-27 22:03:49,952 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3153 transitions. [2023-01-27 22:03:49,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3153 transitions. [2023-01-27 22:03:49,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:03:49,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3153 transitions. [2023-01-27 22:03:49,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 85.21621621621621) internal successors, (3153), 37 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:03:49,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 268.0) internal successors, (10184), 38 states have internal predecessors, (10184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:03:49,959 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 268.0) internal successors, (10184), 38 states have internal predecessors, (10184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:03:49,959 INFO L175 Difference]: Start difference. First operand has 759 places, 3608 transitions, 118033 flow. Second operand 37 states and 3153 transitions. [2023-01-27 22:03:49,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 795 places, 4192 transitions, 143106 flow [2023-01-27 22:04:38,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 779 places, 4192 transitions, 141720 flow, removed 406 selfloop flow, removed 16 redundant places. [2023-01-27 22:04:39,038 INFO L231 Difference]: Finished difference. Result has 798 places, 3875 transitions, 132092 flow [2023-01-27 22:04:39,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=116667, PETRI_DIFFERENCE_MINUEND_PLACES=743, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2075, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=132092, PETRI_PLACES=798, PETRI_TRANSITIONS=3875} [2023-01-27 22:04:39,040 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 768 predicate places. [2023-01-27 22:04:39,040 INFO L495 AbstractCegarLoop]: Abstraction has has 798 places, 3875 transitions, 132092 flow [2023-01-27 22:04:39,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 76.97142857142858) internal successors, (2694), 35 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:04:39,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:04:39,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:04:39,046 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 22:04:39,241 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,SelfDestructingSolverStorable65 [2023-01-27 22:04:39,241 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:04:39,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:04:39,242 INFO L85 PathProgramCache]: Analyzing trace with hash 248552651, now seen corresponding path program 18 times [2023-01-27 22:04:39,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:04:39,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096725182] [2023-01-27 22:04:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:04:39,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:04:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:04:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:04:40,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:04:40,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096725182] [2023-01-27 22:04:40,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096725182] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:04:40,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687598604] [2023-01-27 22:04:40,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:04:40,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:04:40,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:04:40,002 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 22:04:40,004 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 22:04:40,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 22:04:40,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:04:40,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 83 conjunts are in the unsatisfiable core [2023-01-27 22:04:40,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:04:40,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:04:40,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:04:40,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2023-01-27 22:04:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:04:40,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:04:40,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:04:40,747 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 43 treesize of output 46 [2023-01-27 22:04:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:04:40,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687598604] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:04:40,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:04:40,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2023-01-27 22:04:40,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861436754] [2023-01-27 22:04:40,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:04:40,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 22:04:40,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:04:40,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 22:04:40,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2023-01-27 22:04:40,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 268 [2023-01-27 22:04:40,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 798 places, 3875 transitions, 132092 flow. Second operand has 31 states, 31 states have (on average 78.0) internal successors, (2418), 31 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:04:40,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:04:40,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 268 [2023-01-27 22:04:40,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-27 22:05:15,096 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 22:05:15,096 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 22:05:16,140 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 22:05:16,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-01-27 22:05:16,224 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-27 22:05:16,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2023-01-27 22:05:16,224 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-01-27 22:05:16,225 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-27 22:05:16,225 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-27 22:05:16,226 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-27 22:05:16,226 INFO L445 BasicCegarLoop]: Path program histogram: [22, 18, 16, 6, 1, 1, 1, 1, 1] [2023-01-27 22:05:16,227 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 22:05:16,227 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 22:05:16,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 10:05:16 BasicIcfg [2023-01-27 22:05:16,229 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 22:05:16,229 INFO L158 Benchmark]: Toolchain (without parser) took 813429.56ms. Allocated memory was 354.4MB in the beginning and 10.0GB in the end (delta: 9.6GB). Free memory was 304.6MB in the beginning and 3.5GB in the end (delta: -3.2GB). Peak memory consumption was 8.0GB. Max. memory is 16.0GB. [2023-01-27 22:05:16,229 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 214.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 22:05:16,229 INFO L158 Benchmark]: CACSL2BoogieTranslator took 159.68ms. Allocated memory is still 354.4MB. Free memory was 304.3MB in the beginning and 292.9MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 22:05:16,229 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.75ms. Allocated memory is still 354.4MB. Free memory was 292.9MB in the beginning and 290.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 22:05:16,230 INFO L158 Benchmark]: Boogie Preprocessor took 17.65ms. Allocated memory is still 354.4MB. Free memory was 290.8MB in the beginning and 289.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 22:05:16,230 INFO L158 Benchmark]: RCFGBuilder took 539.42ms. Allocated memory is still 354.4MB. Free memory was 288.8MB in the beginning and 308.2MB in the end (delta: -19.4MB). Peak memory consumption was 18.3MB. Max. memory is 16.0GB. [2023-01-27 22:05:16,230 INFO L158 Benchmark]: TraceAbstraction took 812681.47ms. Allocated memory was 354.4MB in the beginning and 10.0GB in the end (delta: 9.6GB). Free memory was 307.4MB in the beginning and 3.5GB in the end (delta: -3.2GB). Peak memory consumption was 8.0GB. Max. memory is 16.0GB. [2023-01-27 22:05:16,230 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 214.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 159.68ms. Allocated memory is still 354.4MB. Free memory was 304.3MB in the beginning and 292.9MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.75ms. Allocated memory is still 354.4MB. Free memory was 292.9MB in the beginning and 290.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 17.65ms. Allocated memory is still 354.4MB. Free memory was 290.8MB in the beginning and 289.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 539.42ms. Allocated memory is still 354.4MB. Free memory was 288.8MB in the beginning and 308.2MB in the end (delta: -19.4MB). Peak memory consumption was 18.3MB. Max. memory is 16.0GB. * TraceAbstraction took 812681.47ms. Allocated memory was 354.4MB in the beginning and 10.0GB in the end (delta: 9.6GB). Free memory was 307.4MB in the beginning and 3.5GB in the end (delta: -3.2GB). Peak memory consumption was 8.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.3s, 129 PlacesBefore, 30 PlacesAfterwards, 131 TransitionsBefore, 24 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 7 FixpointIterations, 70 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 124 TotalNumberOfCompositions, 1489 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1441, independent: 1423, independent conditional: 0, independent unconditional: 1423, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 699, independent: 692, independent conditional: 0, independent unconditional: 692, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1441, independent: 731, independent conditional: 0, independent unconditional: 731, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 699, unknown conditional: 0, unknown unconditional: 699] , Statistics on independence cache: Total cache size (in pairs): 53, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, 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: 95]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 163 locations, 4 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: 812.6s, OverallIterations: 67, TraceHistogramMax: 2, PathProgramHistogramMax: 22, EmptinessCheckTime: 0.0s, AutomataDifference: 739.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.4s, HoareTripleCheckerStatistics: 198 mSolverCounterUnknown, 10512 SdHoareTripleChecker+Valid, 65.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10512 mSDsluCounter, 3219 SdHoareTripleChecker+Invalid, 61.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2645 IncrementalHoareTripleChecker+Unchecked, 2859 mSDsCounter, 556 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 53395 IncrementalHoareTripleChecker+Invalid, 56794 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 556 mSolverCounterUnsat, 360 mSDtfsCounter, 53395 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4146 GetRequests, 2135 SyntacticMatches, 91 SemanticMatches, 1920 ConstructedPredicates, 18 IntricatePredicates, 3 DeprecatedPredicates, 19106 ImplicationChecksByTransitivity, 42.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132092occurred in iteration=66, InterpolantAutomatonStates: 1076, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 47.7s InterpolantComputationTime, 3109 NumberOfCodeBlocks, 3109 NumberOfCodeBlocksAsserted, 187 NumberOfCheckSat, 4429 ConstructedInterpolants, 160 QuantifiedInterpolants, 42688 SizeOfPredicates, 1094 NumberOfNonLiveVariables, 16920 ConjunctsInSsa, 2500 ConjunctsInUnsatCore, 193 InterpolantComputations, 9 PerfectInterpolantSequences, 317/927 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