/usr/bin/java -Xmx8000000000 -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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/queue_ok_longer.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 14:21:00,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 14:21:00,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 14:21:00,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 14:21:00,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 14:21:00,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 14:21:00,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 14:21:00,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 14:21:00,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 14:21:00,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 14:21:00,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 14:21:00,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 14:21:00,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 14:21:00,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 14:21:00,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 14:21:00,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 14:21:00,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 14:21:00,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 14:21:00,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 14:21:00,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 14:21:00,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 14:21:00,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 14:21:00,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 14:21:00,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 14:21:00,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 14:21:00,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 14:21:00,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 14:21:00,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 14:21:00,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 14:21:00,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 14:21:00,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 14:21:00,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 14:21:00,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 14:21:00,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 14:21:00,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 14:21:00,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 14:21:00,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 14:21:00,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 14:21:00,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 14:21:00,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 14:21:00,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 14:21:00,717 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-SemanticLbe.epf [2022-12-12 14:21:00,741 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 14:21:00,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 14:21:00,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 14:21:00,743 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 14:21:00,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 14:21:00,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 14:21:00,744 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 14:21:00,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 14:21:00,745 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 14:21:00,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 14:21:00,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 14:21:00,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 14:21:00,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 14:21:00,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 14:21:00,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 14:21:00,745 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 14:21:00,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 14:21:00,746 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 14:21:00,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 14:21:00,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 14:21:00,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 14:21:00,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 14:21:00,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 14:21:00,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 14:21:00,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 14:21:00,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 14:21:00,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 14:21:00,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 14:21:00,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 14:21:00,747 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 14:21:00,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 14:21:01,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 14:21:01,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 14:21:01,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 14:21:01,049 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 14:21:01,049 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 14:21:01,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_ok_longer.i [2022-12-12 14:21:02,126 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 14:21:02,401 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 14:21:02,402 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longer.i [2022-12-12 14:21:02,419 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46fd74ca4/b9ab6db571034126a11a6add5513416c/FLAG5055aaea7 [2022-12-12 14:21:02,429 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46fd74ca4/b9ab6db571034126a11a6add5513416c [2022-12-12 14:21:02,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 14:21:02,434 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 14:21:02,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 14:21:02,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 14:21:02,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 14:21:02,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 02:21:02" (1/1) ... [2022-12-12 14:21:02,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66d94fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:02, skipping insertion in model container [2022-12-12 14:21:02,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 02:21:02" (1/1) ... [2022-12-12 14:21:02,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 14:21:02,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 14:21:02,835 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longer.i[43272,43285] [2022-12-12 14:21:02,840 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longer.i[43545,43558] [2022-12-12 14:21:02,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 14:21:02,852 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 14:21:02,899 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longer.i[43272,43285] [2022-12-12 14:21:02,904 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longer.i[43545,43558] [2022-12-12 14:21:02,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 14:21:02,955 INFO L208 MainTranslator]: Completed translation [2022-12-12 14:21:02,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:02 WrapperNode [2022-12-12 14:21:02,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 14:21:02,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 14:21:02,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 14:21:02,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 14:21:02,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:02" (1/1) ... [2022-12-12 14:21:02,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:02" (1/1) ... [2022-12-12 14:21:03,016 INFO L138 Inliner]: procedures = 274, calls = 57, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 202 [2022-12-12 14:21:03,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 14:21:03,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 14:21:03,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 14:21:03,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 14:21:03,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:02" (1/1) ... [2022-12-12 14:21:03,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:02" (1/1) ... [2022-12-12 14:21:03,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:02" (1/1) ... [2022-12-12 14:21:03,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:02" (1/1) ... [2022-12-12 14:21:03,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:02" (1/1) ... [2022-12-12 14:21:03,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:02" (1/1) ... [2022-12-12 14:21:03,045 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:02" (1/1) ... [2022-12-12 14:21:03,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:02" (1/1) ... [2022-12-12 14:21:03,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 14:21:03,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 14:21:03,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 14:21:03,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 14:21:03,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:02" (1/1) ... [2022-12-12 14:21:03,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 14:21:03,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:21:03,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-12 14:21:03,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-12 14:21:03,134 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-12 14:21:03,134 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-12 14:21:03,134 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-12 14:21:03,134 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-12 14:21:03,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 14:21:03,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 14:21:03,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 14:21:03,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 14:21:03,134 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-12 14:21:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 14:21:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 14:21:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 14:21:03,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 14:21:03,136 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 14:21:03,310 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 14:21:03,311 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 14:21:03,569 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 14:21:03,575 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 14:21:03,575 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-12 14:21:03,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 02:21:03 BoogieIcfgContainer [2022-12-12 14:21:03,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 14:21:03,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 14:21:03,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 14:21:03,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 14:21:03,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 02:21:02" (1/3) ... [2022-12-12 14:21:03,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5888c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 02:21:03, skipping insertion in model container [2022-12-12 14:21:03,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:02" (2/3) ... [2022-12-12 14:21:03,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5888c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 02:21:03, skipping insertion in model container [2022-12-12 14:21:03,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 02:21:03" (3/3) ... [2022-12-12 14:21:03,583 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2022-12-12 14:21:03,595 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 14:21:03,595 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-12 14:21:03,596 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 14:21:03,664 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 14:21:03,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 215 transitions, 446 flow [2022-12-12 14:21:03,786 INFO L130 PetriNetUnfolder]: 13/213 cut-off events. [2022-12-12 14:21:03,786 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 14:21:03,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 213 events. 13/213 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 357 event pairs, 0 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2022-12-12 14:21:03,792 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 215 transitions, 446 flow [2022-12-12 14:21:03,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 204 transitions, 417 flow [2022-12-12 14:21:03,802 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 14:21:03,818 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 204 transitions, 417 flow [2022-12-12 14:21:03,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 204 transitions, 417 flow [2022-12-12 14:21:03,880 INFO L130 PetriNetUnfolder]: 13/204 cut-off events. [2022-12-12 14:21:03,880 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 14:21:03,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 204 events. 13/204 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 293 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2022-12-12 14:21:03,889 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 204 transitions, 417 flow [2022-12-12 14:21:03,889 INFO L226 LiptonReduction]: Number of co-enabled transitions 9810 [2022-12-12 14:21:11,661 INFO L241 LiptonReduction]: Total number of compositions: 167 [2022-12-12 14:21:11,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 14:21:11,693 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;@7d68a147, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 14:21:11,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-12 14:21:11,695 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-12 14:21:11,695 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 14:21:11,695 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:11,696 INFO L214 CegarLoopForPetriNet]: trace histogram [1] [2022-12-12 14:21:11,697 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 2 more)] === [2022-12-12 14:21:11,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:11,700 INFO L85 PathProgramCache]: Analyzing trace with hash 880, now seen corresponding path program 1 times [2022-12-12 14:21:11,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:11,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813159346] [2022-12-12 14:21:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:11,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:11,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:11,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813159346] [2022-12-12 14:21:11,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813159346] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:21:11,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:21:11,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-12 14:21:11,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671940500] [2022-12-12 14:21:11,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:21:11,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-12 14:21:11,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:11,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-12 14:21:11,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-12 14:21:11,919 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 82 [2022-12-12 14:21:11,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 173 flow. Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:11,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:11,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 82 [2022-12-12 14:21:11,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:12,352 INFO L130 PetriNetUnfolder]: 3558/5821 cut-off events. [2022-12-12 14:21:12,352 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-12-12 14:21:12,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11288 conditions, 5821 events. 3558/5821 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 33901 event pairs, 2900 based on Foata normal form. 0/3129 useless extension candidates. Maximal degree in co-relation 11124. Up to 5369 conditions per place. [2022-12-12 14:21:12,375 INFO L137 encePairwiseOnDemand]: 80/82 looper letters, 65 selfloop transitions, 0 changer transitions 0/80 dead transitions. [2022-12-12 14:21:12,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 299 flow [2022-12-12 14:21:12,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-12 14:21:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-12 14:21:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 97 transitions. [2022-12-12 14:21:12,386 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2022-12-12 14:21:12,387 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 173 flow. Second operand 2 states and 97 transitions. [2022-12-12 14:21:12,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 299 flow [2022-12-12 14:21:12,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 294 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-12 14:21:12,393 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 164 flow [2022-12-12 14:21:12,394 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=164, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2022-12-12 14:21:12,396 INFO L295 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2022-12-12 14:21:12,397 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 164 flow [2022-12-12 14:21:12,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:12,397 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:12,397 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:12,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 14:21:12,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 14:21:12,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:12,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1562134785, now seen corresponding path program 1 times [2022-12-12 14:21:12,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:12,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227940152] [2022-12-12 14:21:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:12,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:12,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:12,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227940152] [2022-12-12 14:21:12,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227940152] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:21:12,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:21:12,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 14:21:12,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213628781] [2022-12-12 14:21:12,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:21:12,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 14:21:12,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:12,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 14:21:12,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 14:21:12,597 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 82 [2022-12-12 14:21:12,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:12,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:12,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 82 [2022-12-12 14:21:12,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:12,755 INFO L130 PetriNetUnfolder]: 1015/1864 cut-off events. [2022-12-12 14:21:12,755 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-12 14:21:12,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3690 conditions, 1864 events. 1015/1864 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10148 event pairs, 820 based on Foata normal form. 119/1151 useless extension candidates. Maximal degree in co-relation 3687. Up to 1342 conditions per place. [2022-12-12 14:21:12,761 INFO L137 encePairwiseOnDemand]: 78/82 looper letters, 38 selfloop transitions, 2 changer transitions 38/91 dead transitions. [2022-12-12 14:21:12,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 91 transitions, 343 flow [2022-12-12 14:21:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 14:21:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 14:21:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2022-12-12 14:21:12,763 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2022-12-12 14:21:12,763 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 164 flow. Second operand 3 states and 120 transitions. [2022-12-12 14:21:12,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 91 transitions, 343 flow [2022-12-12 14:21:12,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 91 transitions, 343 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-12 14:21:12,766 INFO L231 Difference]: Finished difference. Result has 81 places, 48 transitions, 108 flow [2022-12-12 14:21:12,766 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=81, PETRI_TRANSITIONS=48} [2022-12-12 14:21:12,767 INFO L295 CegarLoopForPetriNet]: 81 programPoint places, 0 predicate places. [2022-12-12 14:21:12,767 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 48 transitions, 108 flow [2022-12-12 14:21:12,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:12,767 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:12,768 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:12,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 14:21:12,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 14:21:12,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:12,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1256220703, now seen corresponding path program 1 times [2022-12-12 14:21:12,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:12,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818413029] [2022-12-12 14:21:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:12,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:12,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:12,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818413029] [2022-12-12 14:21:12,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818413029] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:21:12,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:21:12,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 14:21:12,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797713961] [2022-12-12 14:21:12,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:21:12,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 14:21:12,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:12,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 14:21:12,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 14:21:12,872 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 82 [2022-12-12 14:21:12,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:12,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:12,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 82 [2022-12-12 14:21:12,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:12,950 INFO L130 PetriNetUnfolder]: 363/772 cut-off events. [2022-12-12 14:21:12,950 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-12 14:21:12,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1474 conditions, 772 events. 363/772 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3383 event pairs, 243 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 1469. Up to 504 conditions per place. [2022-12-12 14:21:12,953 INFO L137 encePairwiseOnDemand]: 79/82 looper letters, 44 selfloop transitions, 2 changer transitions 2/61 dead transitions. [2022-12-12 14:21:12,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 232 flow [2022-12-12 14:21:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 14:21:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 14:21:12,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2022-12-12 14:21:12,954 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3699186991869919 [2022-12-12 14:21:12,954 INFO L175 Difference]: Start difference. First operand has 81 places, 48 transitions, 108 flow. Second operand 3 states and 91 transitions. [2022-12-12 14:21:12,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 232 flow [2022-12-12 14:21:12,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-12 14:21:12,956 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 114 flow [2022-12-12 14:21:12,956 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2022-12-12 14:21:12,956 INFO L295 CegarLoopForPetriNet]: 81 programPoint places, -29 predicate places. [2022-12-12 14:21:12,956 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 114 flow [2022-12-12 14:21:12,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:12,957 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:12,957 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:12,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 14:21:12,957 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 14:21:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:12,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1222990673, now seen corresponding path program 1 times [2022-12-12 14:21:12,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:12,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927827582] [2022-12-12 14:21:12,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:12,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:13,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:13,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927827582] [2022-12-12 14:21:13,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927827582] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:21:13,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:21:13,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 14:21:13,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462854766] [2022-12-12 14:21:13,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:21:13,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 14:21:13,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:13,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 14:21:13,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 14:21:13,135 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 82 [2022-12-12 14:21:13,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:13,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:13,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 82 [2022-12-12 14:21:13,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:13,191 INFO L130 PetriNetUnfolder]: 206/516 cut-off events. [2022-12-12 14:21:13,191 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-12-12 14:21:13,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 516 events. 206/516 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2265 event pairs, 12 based on Foata normal form. 45/456 useless extension candidates. Maximal degree in co-relation 1017. Up to 388 conditions per place. [2022-12-12 14:21:13,193 INFO L137 encePairwiseOnDemand]: 77/82 looper letters, 37 selfloop transitions, 5 changer transitions 1/54 dead transitions. [2022-12-12 14:21:13,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 54 transitions, 213 flow [2022-12-12 14:21:13,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 14:21:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 14:21:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2022-12-12 14:21:13,194 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34552845528455284 [2022-12-12 14:21:13,194 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 114 flow. Second operand 3 states and 85 transitions. [2022-12-12 14:21:13,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 54 transitions, 213 flow [2022-12-12 14:21:13,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 54 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 14:21:13,196 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 120 flow [2022-12-12 14:21:13,196 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2022-12-12 14:21:13,196 INFO L295 CegarLoopForPetriNet]: 81 programPoint places, -29 predicate places. [2022-12-12 14:21:13,196 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 120 flow [2022-12-12 14:21:13,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:13,197 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:13,197 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:13,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 14:21:13,197 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 14:21:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:13,197 INFO L85 PathProgramCache]: Analyzing trace with hash -396061117, now seen corresponding path program 1 times [2022-12-12 14:21:13,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:13,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257173391] [2022-12-12 14:21:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:13,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:13,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:13,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257173391] [2022-12-12 14:21:13,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257173391] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:21:13,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086813343] [2022-12-12 14:21:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:13,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:21:13,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:21:13,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:21:13,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 14:21:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:13,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-12 14:21:13,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:21:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:13,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:21:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:13,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086813343] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:21:13,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:21:13,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-12 14:21:13,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19625335] [2022-12-12 14:21:13,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:21:13,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 14:21:13,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 14:21:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-12 14:21:13,472 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 82 [2022-12-12 14:21:13,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 120 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:13,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:13,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 82 [2022-12-12 14:21:13,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:13,589 INFO L130 PetriNetUnfolder]: 264/699 cut-off events. [2022-12-12 14:21:13,589 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-12-12 14:21:13,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1387 conditions, 699 events. 264/699 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2745 event pairs, 110 based on Foata normal form. 15/592 useless extension candidates. Maximal degree in co-relation 1381. Up to 301 conditions per place. [2022-12-12 14:21:13,592 INFO L137 encePairwiseOnDemand]: 78/82 looper letters, 66 selfloop transitions, 6 changer transitions 0/84 dead transitions. [2022-12-12 14:21:13,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 84 transitions, 350 flow [2022-12-12 14:21:13,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 14:21:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 14:21:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2022-12-12 14:21:13,593 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3231707317073171 [2022-12-12 14:21:13,593 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 120 flow. Second operand 6 states and 159 transitions. [2022-12-12 14:21:13,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 84 transitions, 350 flow [2022-12-12 14:21:13,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 84 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 14:21:13,595 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 155 flow [2022-12-12 14:21:13,595 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=155, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2022-12-12 14:21:13,595 INFO L295 CegarLoopForPetriNet]: 81 programPoint places, -22 predicate places. [2022-12-12 14:21:13,595 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 155 flow [2022-12-12 14:21:13,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:13,596 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:13,596 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:13,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-12 14:21:13,800 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 [2022-12-12 14:21:13,801 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 14:21:13,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:13,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1122003715, now seen corresponding path program 2 times [2022-12-12 14:21:13,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:13,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634340083] [2022-12-12 14:21:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:13,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:13,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:13,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634340083] [2022-12-12 14:21:13,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634340083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:21:13,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796008875] [2022-12-12 14:21:13,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 14:21:13,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:21:13,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:21:13,954 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:21:13,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 14:21:14,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 14:21:14,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:21:14,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 14:21:14,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:21:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:14,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:21:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:14,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796008875] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:21:14,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:21:14,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-12 14:21:14,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686346093] [2022-12-12 14:21:14,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:21:14,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 14:21:14,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:14,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 14:21:14,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-12 14:21:14,291 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 82 [2022-12-12 14:21:14,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 155 flow. Second operand has 13 states, 13 states have (on average 19.076923076923077) internal successors, (248), 13 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:14,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:14,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 82 [2022-12-12 14:21:14,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:14,492 INFO L130 PetriNetUnfolder]: 438/1233 cut-off events. [2022-12-12 14:21:14,492 INFO L131 PetriNetUnfolder]: For 408/408 co-relation queries the response was YES. [2022-12-12 14:21:14,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2572 conditions, 1233 events. 438/1233 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4842 event pairs, 110 based on Foata normal form. 30/1075 useless extension candidates. Maximal degree in co-relation 2562. Up to 301 conditions per place. [2022-12-12 14:21:14,497 INFO L137 encePairwiseOnDemand]: 78/82 looper letters, 126 selfloop transitions, 12 changer transitions 0/150 dead transitions. [2022-12-12 14:21:14,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 150 transitions, 717 flow [2022-12-12 14:21:14,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 14:21:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 14:21:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 312 transitions. [2022-12-12 14:21:14,499 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3170731707317073 [2022-12-12 14:21:14,499 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 155 flow. Second operand 12 states and 312 transitions. [2022-12-12 14:21:14,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 150 transitions, 717 flow [2022-12-12 14:21:14,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 150 transitions, 697 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-12 14:21:14,502 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 243 flow [2022-12-12 14:21:14,502 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=243, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2022-12-12 14:21:14,502 INFO L295 CegarLoopForPetriNet]: 81 programPoint places, -5 predicate places. [2022-12-12 14:21:14,503 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 243 flow [2022-12-12 14:21:14,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.076923076923077) internal successors, (248), 13 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:14,503 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:14,503 INFO L214 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:14,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 14:21:14,709 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 [2022-12-12 14:21:14,709 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 14:21:14,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:14,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1632759235, now seen corresponding path program 3 times [2022-12-12 14:21:14,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:14,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472005972] [2022-12-12 14:21:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:14,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:14,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:14,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472005972] [2022-12-12 14:21:14,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472005972] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:21:14,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833571001] [2022-12-12 14:21:14,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 14:21:14,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:21:14,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:21:14,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:21:14,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 14:21:15,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-12 14:21:15,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:21:15,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-12 14:21:15,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:21:15,888 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 13 treesize of output 9 [2022-12-12 14:21:15,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 14:21:15,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-12 14:21:15,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 14:21:15,960 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-12 14:21:15,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 27 [2022-12-12 14:21:15,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 14:21:15,995 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 23 treesize of output 22 [2022-12-12 14:21:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 76 proven. 45 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-12-12 14:21:16,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:21:16,019 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 10 treesize of output 4 [2022-12-12 14:21:16,079 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_576 (Array Int Int)) (v_ArrVal_578 Int)) (not (<= 400 (let ((.cse1 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse0 (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_576) |c_~#queue~0.base|))) (store .cse0 (+ (* (select .cse0 .cse1) 4) |c_~#queue~0.offset|) v_ArrVal_578)) .cse1))))) is different from false [2022-12-12 14:21:16,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 14:21:16,086 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 49 treesize of output 40 [2022-12-12 14:21:16,093 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 14:21:16,093 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 63 treesize of output 65 [2022-12-12 14:21:16,097 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 63 treesize of output 51 [2022-12-12 14:21:16,108 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 8 treesize of output 4 [2022-12-12 14:21:16,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 14:21:16,122 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 51 treesize of output 43 [2022-12-12 14:21:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 68 proven. 45 refuted. 0 times theorem prover too weak. 204 trivial. 8 not checked. [2022-12-12 14:21:16,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833571001] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:21:16,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:21:16,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 8] total 26 [2022-12-12 14:21:16,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383045517] [2022-12-12 14:21:16,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:21:16,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 14:21:16,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:16,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 14:21:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=480, Unknown=1, NotChecked=46, Total=650 [2022-12-12 14:21:16,245 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 82 [2022-12-12 14:21:16,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 243 flow. Second operand has 26 states, 26 states have (on average 12.576923076923077) internal successors, (327), 26 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:16,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:16,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 82 [2022-12-12 14:21:16,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:18,146 INFO L130 PetriNetUnfolder]: 1321/2993 cut-off events. [2022-12-12 14:21:18,147 INFO L131 PetriNetUnfolder]: For 1259/1259 co-relation queries the response was YES. [2022-12-12 14:21:18,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7274 conditions, 2993 events. 1321/2993 cut-off events. For 1259/1259 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 13552 event pairs, 30 based on Foata normal form. 10/2313 useless extension candidates. Maximal degree in co-relation 7257. Up to 404 conditions per place. [2022-12-12 14:21:18,159 INFO L137 encePairwiseOnDemand]: 67/82 looper letters, 311 selfloop transitions, 104 changer transitions 49/469 dead transitions. [2022-12-12 14:21:18,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 469 transitions, 2312 flow [2022-12-12 14:21:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-12 14:21:18,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-12-12 14:21:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 779 transitions. [2022-12-12 14:21:18,162 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.22093023255813954 [2022-12-12 14:21:18,162 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 243 flow. Second operand 43 states and 779 transitions. [2022-12-12 14:21:18,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 469 transitions, 2312 flow [2022-12-12 14:21:18,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 469 transitions, 2300 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-12 14:21:18,172 INFO L231 Difference]: Finished difference. Result has 141 places, 158 transitions, 1076 flow [2022-12-12 14:21:18,173 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1076, PETRI_PLACES=141, PETRI_TRANSITIONS=158} [2022-12-12 14:21:18,173 INFO L295 CegarLoopForPetriNet]: 81 programPoint places, 60 predicate places. [2022-12-12 14:21:18,173 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 158 transitions, 1076 flow [2022-12-12 14:21:18,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 12.576923076923077) internal successors, (327), 26 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:18,174 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:18,174 INFO L214 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:18,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 14:21:18,380 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 [2022-12-12 14:21:18,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 14:21:18,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:18,381 INFO L85 PathProgramCache]: Analyzing trace with hash 969561687, now seen corresponding path program 1 times [2022-12-12 14:21:18,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:18,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599288869] [2022-12-12 14:21:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:18,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:18,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:18,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599288869] [2022-12-12 14:21:18,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599288869] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:21:18,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318237570] [2022-12-12 14:21:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:18,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:21:18,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:21:18,721 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:21:18,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 14:21:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:18,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 14:21:18,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:21:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:19,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:21:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:19,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318237570] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:21:19,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:21:19,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-12-12 14:21:19,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976550011] [2022-12-12 14:21:19,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:21:19,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 14:21:19,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:19,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 14:21:19,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-12 14:21:19,258 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 82 [2022-12-12 14:21:19,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 158 transitions, 1076 flow. Second operand has 27 states, 27 states have (on average 19.37037037037037) internal successors, (523), 27 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:19,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:19,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 82 [2022-12-12 14:21:19,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:20,315 INFO L130 PetriNetUnfolder]: 1561/4157 cut-off events. [2022-12-12 14:21:20,316 INFO L131 PetriNetUnfolder]: For 36384/36384 co-relation queries the response was YES. [2022-12-12 14:21:20,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16299 conditions, 4157 events. 1561/4157 cut-off events. For 36384/36384 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 18725 event pairs, 214 based on Foata normal form. 130/3859 useless extension candidates. Maximal degree in co-relation 16255. Up to 589 conditions per place. [2022-12-12 14:21:20,346 INFO L137 encePairwiseOnDemand]: 78/82 looper letters, 389 selfloop transitions, 52 changer transitions 0/463 dead transitions. [2022-12-12 14:21:20,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 463 transitions, 5111 flow [2022-12-12 14:21:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-12 14:21:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-12 14:21:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 669 transitions. [2022-12-12 14:21:20,354 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.31378986866791747 [2022-12-12 14:21:20,354 INFO L175 Difference]: Start difference. First operand has 141 places, 158 transitions, 1076 flow. Second operand 26 states and 669 transitions. [2022-12-12 14:21:20,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 463 transitions, 5111 flow [2022-12-12 14:21:20,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 463 transitions, 4960 flow, removed 14 selfloop flow, removed 11 redundant places. [2022-12-12 14:21:20,455 INFO L231 Difference]: Finished difference. Result has 167 places, 184 transitions, 1465 flow [2022-12-12 14:21:20,456 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1465, PETRI_PLACES=167, PETRI_TRANSITIONS=184} [2022-12-12 14:21:20,458 INFO L295 CegarLoopForPetriNet]: 81 programPoint places, 86 predicate places. [2022-12-12 14:21:20,458 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 184 transitions, 1465 flow [2022-12-12 14:21:20,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 19.37037037037037) internal successors, (523), 27 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:20,459 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:20,459 INFO L214 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 24, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:20,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 14:21:20,664 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 [2022-12-12 14:21:20,665 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 14:21:20,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:20,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1416325453, now seen corresponding path program 2 times [2022-12-12 14:21:20,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:20,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689402808] [2022-12-12 14:21:20,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:20,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 0 proven. 1878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:21,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:21,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689402808] [2022-12-12 14:21:21,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689402808] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:21:21,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74599994] [2022-12-12 14:21:21,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 14:21:21,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:21:21,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:21:21,632 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:21:21,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 14:21:21,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 14:21:21,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:21:22,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-12 14:21:22,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:21:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 0 proven. 1878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:22,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:21:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 0 proven. 1878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:23,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74599994] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:21:23,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:21:23,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-12-12 14:21:23,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640975924] [2022-12-12 14:21:23,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:21:23,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-12 14:21:23,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:23,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-12 14:21:23,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-12-12 14:21:23,037 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 82 [2022-12-12 14:21:23,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 184 transitions, 1465 flow. Second operand has 53 states, 53 states have (on average 19.471698113207548) internal successors, (1032), 53 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:23,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:23,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 82 [2022-12-12 14:21:23,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:25,923 INFO L130 PetriNetUnfolder]: 2965/8031 cut-off events. [2022-12-12 14:21:25,923 INFO L131 PetriNetUnfolder]: For 126395/126395 co-relation queries the response was YES. [2022-12-12 14:21:25,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33539 conditions, 8031 events. 2965/8031 cut-off events. For 126395/126395 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 36124 event pairs, 214 based on Foata normal form. 260/7551 useless extension candidates. Maximal degree in co-relation 33482. Up to 1320 conditions per place. [2022-12-12 14:21:25,995 INFO L137 encePairwiseOnDemand]: 78/82 looper letters, 779 selfloop transitions, 104 changer transitions 0/905 dead transitions. [2022-12-12 14:21:25,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 905 transitions, 10742 flow [2022-12-12 14:21:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-12 14:21:25,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-12 14:21:26,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 1332 transitions. [2022-12-12 14:21:26,001 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3123827392120075 [2022-12-12 14:21:26,001 INFO L175 Difference]: Start difference. First operand has 167 places, 184 transitions, 1465 flow. Second operand 52 states and 1332 transitions. [2022-12-12 14:21:26,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 905 transitions, 10742 flow [2022-12-12 14:21:26,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 905 transitions, 10698 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-12-12 14:21:26,180 INFO L231 Difference]: Finished difference. Result has 234 places, 238 transitions, 2611 flow [2022-12-12 14:21:26,180 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1421, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2611, PETRI_PLACES=234, PETRI_TRANSITIONS=238} [2022-12-12 14:21:26,181 INFO L295 CegarLoopForPetriNet]: 81 programPoint places, 153 predicate places. [2022-12-12 14:21:26,181 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 238 transitions, 2611 flow [2022-12-12 14:21:26,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 19.471698113207548) internal successors, (1032), 53 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:26,183 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:26,183 INFO L214 CegarLoopForPetriNet]: trace histogram [50, 50, 50, 50, 50, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:26,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 14:21:26,391 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 [2022-12-12 14:21:26,392 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 14:21:26,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:26,392 INFO L85 PathProgramCache]: Analyzing trace with hash -13865925, now seen corresponding path program 3 times [2022-12-12 14:21:26,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:26,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377326842] [2022-12-12 14:21:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:26,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8300 backedges. 0 proven. 8300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:29,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:29,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377326842] [2022-12-12 14:21:29,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377326842] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:21:29,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499136197] [2022-12-12 14:21:29,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 14:21:29,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:21:29,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:21:29,423 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:21:29,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 14:21:30,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-12 14:21:30,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:21:30,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-12 14:21:30,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:21:32,099 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 13 treesize of output 9 [2022-12-12 14:21:32,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 14:21:32,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-12 14:21:32,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 14:21:32,195 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-12-12 14:21:32,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2022-12-12 14:21:32,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 14:21:32,265 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 23 treesize of output 22 [2022-12-12 14:21:32,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 18 [2022-12-12 14:21:32,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 14:21:32,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-12 14:21:32,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 14:21:32,431 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-12 14:21:32,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 27 [2022-12-12 14:21:32,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 14:21:32,470 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 23 treesize of output 22 [2022-12-12 14:21:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8300 backedges. 716 proven. 246 refuted. 0 times theorem prover too weak. 7338 trivial. 0 not checked. [2022-12-12 14:21:32,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:21:32,636 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2172 Int) (v_ArrVal_2175 Int) (v_ArrVal_2174 (Array Int Int))) (or (not (<= v_ArrVal_2172 (+ |c_t1Thread1of1ForFork0_enqueue_#t~mem40#1| 1))) (not (<= 400 (let ((.cse1 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604) v_ArrVal_2172)) |c_~#stored_elements~0.base| v_ArrVal_2174) |c_~#queue~0.base|))) (store .cse0 (+ |c_~#queue~0.offset| (* 4 (select .cse0 .cse1))) v_ArrVal_2175)) .cse1)))))) is different from false [2022-12-12 14:21:32,645 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2172 Int) (v_ArrVal_2175 Int) (v_ArrVal_2174 (Array Int Int))) (let ((.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (or (not (<= 400 (let ((.cse1 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store .cse2 .cse3 v_ArrVal_2172)) |c_~#stored_elements~0.base| v_ArrVal_2174) |c_~#queue~0.base|))) (store .cse0 (+ |c_~#queue~0.offset| (* 4 (select .cse0 .cse1))) v_ArrVal_2175)) .cse1)))) (< (+ (select .cse2 .cse3) 1) v_ArrVal_2172)))) is different from false [2022-12-12 14:21:32,661 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2172 Int) (v_ArrVal_2175 Int) (v_ArrVal_2174 (Array Int Int)) (v_ArrVal_2170 Int)) (let ((.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (or (not (<= 400 (let ((.cse1 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse2 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2170) .cse3 v_ArrVal_2172)) |c_~#stored_elements~0.base| v_ArrVal_2174) |c_~#queue~0.base|))) (store .cse0 (+ |c_~#queue~0.offset| (* (select .cse0 .cse1) 4)) v_ArrVal_2175)) .cse1)))) (< (+ (select .cse2 .cse3) 1) v_ArrVal_2172)))) is different from false [2022-12-12 14:21:32,687 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2172 Int) (v_ArrVal_2175 Int) (v_ArrVal_2168 Int) (v_ArrVal_2174 (Array Int Int)) (v_ArrVal_2170 Int)) (let ((.cse2 (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ (* |c_t1Thread1of1ForFork0_enqueue_#t~mem36#1| 4) |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2168)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (or (not (<= 400 (let ((.cse1 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse2 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2170) .cse3 v_ArrVal_2172)) |c_~#stored_elements~0.base| v_ArrVal_2174) |c_~#queue~0.base|))) (store .cse0 (+ |c_~#queue~0.offset| (* (select .cse0 .cse1) 4)) v_ArrVal_2175)) .cse1)))) (< (+ (select .cse2 .cse3) 1) v_ArrVal_2172)))) is different from false [2022-12-12 14:21:34,832 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2172 Int) (v_ArrVal_2175 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_175| Int) (v_ArrVal_2168 Int) (v_ArrVal_2167 (Array Int Int)) (v_ArrVal_2174 (Array Int Int)) (v_ArrVal_2170 Int)) (let ((.cse3 (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_2167))) (let ((.cse4 (select .cse3 |c_~#queue~0.base|))) (let ((.cse0 (store .cse4 (+ (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_175| 4) |c_~#queue~0.offset|) v_ArrVal_2168)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (or (< (+ (select .cse0 .cse1) 1) v_ArrVal_2172) (not (<= 400 (select (let ((.cse2 (select (store (store .cse3 |c_~#queue~0.base| (store (store .cse0 (+ 1608 |c_~#queue~0.offset|) v_ArrVal_2170) .cse1 v_ArrVal_2172)) |c_~#stored_elements~0.base| v_ArrVal_2174) |c_~#queue~0.base|))) (store .cse2 (+ |c_~#queue~0.offset| (* (select .cse2 .cse1) 4)) v_ArrVal_2175)) .cse1))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_175| (select .cse4 .cse1)))))))) is different from false [2022-12-12 14:21:34,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 14:21:34,849 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 180 treesize of output 130 [2022-12-12 14:21:34,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 14:21:34,862 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 216 treesize of output 216 [2022-12-12 14:21:34,871 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 181 treesize of output 173 [2022-12-12 14:21:34,879 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 128 [2022-12-12 14:21:34,893 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 8 treesize of output 4 [2022-12-12 14:21:34,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 14:21:34,954 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 73 treesize of output 69 [2022-12-12 14:21:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8300 backedges. 381 proven. 241 refuted. 48 times theorem prover too weak. 7338 trivial. 292 not checked. [2022-12-12 14:21:37,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499136197] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:21:37,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:21:37,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 11, 13] total 75 [2022-12-12 14:21:37,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890644039] [2022-12-12 14:21:37,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:21:37,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-12-12 14:21:37,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:37,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-12-12 14:21:37,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1491, Invalid=3347, Unknown=12, NotChecked=700, Total=5550 [2022-12-12 14:21:37,529 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 82 [2022-12-12 14:21:37,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 238 transitions, 2611 flow. Second operand has 75 states, 75 states have (on average 13.24) internal successors, (993), 75 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:37,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:37,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 82 [2022-12-12 14:21:37,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:22:53,557 INFO L130 PetriNetUnfolder]: 7473/17557 cut-off events. [2022-12-12 14:22:53,558 INFO L131 PetriNetUnfolder]: For 228797/228797 co-relation queries the response was YES. [2022-12-12 14:22:53,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80235 conditions, 17557 events. 7473/17557 cut-off events. For 228797/228797 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 92473 event pairs, 58 based on Foata normal form. 512/16119 useless extension candidates. Maximal degree in co-relation 80151. Up to 2492 conditions per place. [2022-12-12 14:22:53,752 INFO L137 encePairwiseOnDemand]: 67/82 looper letters, 2264 selfloop transitions, 1415 changer transitions 1/3685 dead transitions. [2022-12-12 14:22:53,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 701 places, 3685 transitions, 33568 flow [2022-12-12 14:22:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 468 states. [2022-12-12 14:22:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2022-12-12 14:22:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 7059 transitions. [2022-12-12 14:22:53,775 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.1839430894308943 [2022-12-12 14:22:53,775 INFO L175 Difference]: Start difference. First operand has 234 places, 238 transitions, 2611 flow. Second operand 468 states and 7059 transitions. [2022-12-12 14:22:53,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 701 places, 3685 transitions, 33568 flow [2022-12-12 14:22:54,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 678 places, 3685 transitions, 33390 flow, removed 0 selfloop flow, removed 23 redundant places. [2022-12-12 14:22:54,688 INFO L231 Difference]: Finished difference. Result has 881 places, 1662 transitions, 25142 flow [2022-12-12 14:22:54,689 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=468, PETRI_FLOW=25142, PETRI_PLACES=881, PETRI_TRANSITIONS=1662} [2022-12-12 14:22:54,689 INFO L295 CegarLoopForPetriNet]: 81 programPoint places, 800 predicate places. [2022-12-12 14:22:54,690 INFO L495 AbstractCegarLoop]: Abstraction has has 881 places, 1662 transitions, 25142 flow [2022-12-12 14:22:54,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 13.24) internal successors, (993), 75 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:22:54,690 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:22:54,690 INFO L214 CegarLoopForPetriNet]: trace histogram [51, 51, 51, 51, 51, 37, 37, 37, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:22:54,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-12 14:22:54,897 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 [2022-12-12 14:22:54,897 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 14:22:54,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:22:54,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1262044361, now seen corresponding path program 4 times [2022-12-12 14:22:54,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:22:54,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68090350] [2022-12-12 14:22:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:22:54,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:22:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:22:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9124 backedges. 0 proven. 9124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:22:57,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:22:57,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68090350] [2022-12-12 14:22:57,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68090350] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:22:57,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924906512] [2022-12-12 14:22:57,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 14:22:57,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:22:57,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:22:57,772 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:22:57,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process Received shutdown request... [2022-12-12 14:35:35,283 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 [2022-12-12 14:35:35,312 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 14:35:36,398 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 [2022-12-12 14:35:36,513 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forcibly destroying the process [2022-12-12 14:35:36,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 137 [2022-12-12 14:35:36,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-12 14:35:36,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-12 14:35:36,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2022-12-12 14:35:36,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258056085] [2022-12-12 14:35:36,528 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-12 14:35:36,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-12 14:35:36,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:35:36,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-12 14:35:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2022-12-12 14:35:36,530 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 82 [2022-12-12 14:35:36,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 881 places, 1662 transitions, 25142 flow. Second operand has 54 states, 54 states have (on average 19.72222222222222) internal successors, (1065), 54 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:35:36,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:35:36,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 82 [2022-12-12 14:35:36,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:35:36,544 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2022-12-12 14:35:36,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-12 14:35:36,545 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2022-12-12 14:35:36,546 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-12 14:35:36,546 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-12-12 14:35:36,546 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2022-12-12 14:35:36,546 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-12 14:35:36,546 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1] [2022-12-12 14:35:36,549 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 14:35:36,549 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 14:35:36,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 02:35:36 BasicIcfg [2022-12-12 14:35:36,561 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 14:35:36,561 INFO L158 Benchmark]: Toolchain (without parser) took 874127.54ms. Allocated memory was 197.1MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 170.9MB in the beginning and 681.9MB in the end (delta: -511.0MB). Peak memory consumption was 816.5MB. Max. memory is 8.0GB. [2022-12-12 14:35:36,561 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 197.1MB. Free memory was 173.7MB in the beginning and 173.6MB in the end (delta: 75.2kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 14:35:36,561 INFO L158 Benchmark]: CACSL2BoogieTranslator took 521.89ms. Allocated memory is still 197.1MB. Free memory was 170.4MB in the beginning and 140.5MB in the end (delta: 29.9MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. [2022-12-12 14:35:36,562 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.42ms. Allocated memory is still 197.1MB. Free memory was 140.5MB in the beginning and 137.9MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-12-12 14:35:36,562 INFO L158 Benchmark]: Boogie Preprocessor took 41.92ms. Allocated memory is still 197.1MB. Free memory was 137.9MB in the beginning and 135.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 14:35:36,562 INFO L158 Benchmark]: RCFGBuilder took 517.94ms. Allocated memory is still 197.1MB. Free memory was 135.8MB in the beginning and 114.8MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2022-12-12 14:35:36,562 INFO L158 Benchmark]: TraceAbstraction took 872982.02ms. Allocated memory was 197.1MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 113.8MB in the beginning and 681.9MB in the end (delta: -568.1MB). Peak memory consumption was 759.9MB. Max. memory is 8.0GB. [2022-12-12 14:35:36,566 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 197.1MB. Free memory was 173.7MB in the beginning and 173.6MB in the end (delta: 75.2kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 521.89ms. Allocated memory is still 197.1MB. Free memory was 170.4MB in the beginning and 140.5MB in the end (delta: 29.9MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 58.42ms. Allocated memory is still 197.1MB. Free memory was 140.5MB in the beginning and 137.9MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 41.92ms. Allocated memory is still 197.1MB. Free memory was 137.9MB in the beginning and 135.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 517.94ms. Allocated memory is still 197.1MB. Free memory was 135.8MB in the beginning and 114.8MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * TraceAbstraction took 872982.02ms. Allocated memory was 197.1MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 113.8MB in the beginning and 681.9MB in the end (delta: -568.1MB). Peak memory consumption was 759.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.8s, 198 PlacesBefore, 81 PlacesAfterwards, 204 TransitionsBefore, 82 TransitionsAfterwards, 9810 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 58 TrivialYvCompositions, 97 ConcurrentYvCompositions, 6 ChoiceCompositions, 167 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 9707, independent: 9459, independent conditional: 9459, independent unconditional: 0, dependent: 248, dependent conditional: 248, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 9707, independent: 9459, independent conditional: 0, independent unconditional: 9459, dependent: 248, dependent conditional: 0, dependent unconditional: 248, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 9707, independent: 9459, independent conditional: 0, independent unconditional: 9459, dependent: 248, dependent conditional: 0, dependent unconditional: 248, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 9707, independent: 9459, independent conditional: 0, independent unconditional: 9459, dependent: 248, dependent conditional: 0, dependent unconditional: 248, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 7053, independent: 6946, independent conditional: 0, independent unconditional: 6946, dependent: 107, dependent conditional: 0, dependent unconditional: 107, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 7053, independent: 6926, independent conditional: 0, independent unconditional: 6926, dependent: 127, dependent conditional: 0, dependent unconditional: 127, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 127, independent: 20, independent conditional: 0, independent unconditional: 20, dependent: 107, dependent conditional: 0, dependent unconditional: 107, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 172, independent: 16, independent conditional: 0, independent unconditional: 16, dependent: 155, dependent conditional: 0, dependent unconditional: 155, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 9707, independent: 2513, independent conditional: 0, independent unconditional: 2513, dependent: 141, dependent conditional: 0, dependent unconditional: 141, unknown: 7053, unknown conditional: 0, unknown unconditional: 7053] , Statistics on independence cache: Total cache size (in pairs): 14193, Positive cache size: 14086, Positive conditional cache size: 0, Positive unconditional cache size: 14086, Negative cache size: 107, Negative conditional cache size: 0, Negative unconditional cache size: 107, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 1033]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 1049]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 1053]: 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: 1052]: 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 5 procedures, 325 locations, 5 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: 872.9s, OverallIterations: 11, TraceHistogramMax: 51, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 84.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13785 SdHoareTripleChecker+Valid, 5.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13785 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 4.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1351 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 2428 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4734 IncrementalHoareTripleChecker+Invalid, 8514 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2428 mSolverCounterUnsat, 2 mSDtfsCounter, 4734 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3328 GetRequests, 2114 SyntacticMatches, 471 SemanticMatches, 743 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 266697 ImplicationChecksByTransitivity, 70.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25142occurred in iteration=10, InterpolantAutomatonStates: 618, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 16.5s InterpolantComputationTime, 2199 NumberOfCodeBlocks, 1805 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 3038 ConstructedInterpolants, 14 QuantifiedInterpolants, 13222 SizeOfPredicates, 32 NumberOfNonLiveVariables, 3628 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 23 InterpolantComputations, 4 PerfectInterpolantSequences, 16326/41903 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