/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-After.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 14:29:10,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 14:29:10,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 14:29:10,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 14:29:10,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 14:29:10,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 14:29:10,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 14:29:10,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 14:29:10,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 14:29:10,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 14:29:10,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 14:29:10,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 14:29:10,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 14:29:10,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 14:29:10,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 14:29:10,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 14:29:10,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 14:29:10,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 14:29:10,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 14:29:10,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 14:29:10,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 14:29:10,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 14:29:10,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 14:29:10,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 14:29:10,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 14:29:10,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 14:29:10,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 14:29:10,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 14:29:10,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 14:29:10,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 14:29:10,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 14:29:10,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 14:29:10,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 14:29:10,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 14:29:10,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 14:29:10,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 14:29:10,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 14:29:10,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 14:29:10,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 14:29:10,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 14:29:10,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 14:29:10,434 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-NoLbe-After.epf [2022-01-19 14:29:10,454 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 14:29:10,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 14:29:10,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 14:29:10,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 14:29:10,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 14:29:10,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 14:29:10,456 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 14:29:10,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 14:29:10,456 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 14:29:10,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 14:29:10,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 14:29:10,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 14:29:10,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 14:29:10,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 14:29:10,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 14:29:10,457 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 14:29:10,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 14:29:10,457 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 14:29:10,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 14:29:10,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 14:29:10,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 14:29:10,457 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 14:29:10,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 14:29:10,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:29:10,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 14:29:10,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 14:29:10,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 14:29:10,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 14:29:10,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 14:29:10,458 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 14:29:10,458 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 14:29:10,459 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=AFTER [2022-01-19 14:29:10,459 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 14:29:10,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 14:29:10,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 14:29:10,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 14:29:10,676 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 14:29:10,677 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 14:29:10,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-01-19 14:29:10,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec5ffb7d8/083d9f2a0d3348a7bcaa4ff9970b7678/FLAG78b3f98d4 [2022-01-19 14:29:11,068 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 14:29:11,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-01-19 14:29:11,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec5ffb7d8/083d9f2a0d3348a7bcaa4ff9970b7678/FLAG78b3f98d4 [2022-01-19 14:29:11,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec5ffb7d8/083d9f2a0d3348a7bcaa4ff9970b7678 [2022-01-19 14:29:11,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 14:29:11,467 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 14:29:11,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 14:29:11,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 14:29:11,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 14:29:11,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:29:11" (1/1) ... [2022-01-19 14:29:11,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa64f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:29:11, skipping insertion in model container [2022-01-19 14:29:11,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:29:11" (1/1) ... [2022-01-19 14:29:11,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 14:29:11,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 14:29:11,634 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-01-19 14:29:11,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:29:11,642 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 14:29:11,660 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-01-19 14:29:11,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:29:11,671 INFO L208 MainTranslator]: Completed translation [2022-01-19 14:29:11,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:29:11 WrapperNode [2022-01-19 14:29:11,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 14:29:11,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 14:29:11,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 14:29:11,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 14:29:11,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:29:11" (1/1) ... [2022-01-19 14:29:11,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:29:11" (1/1) ... [2022-01-19 14:29:11,698 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-01-19 14:29:11,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 14:29:11,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 14:29:11,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 14:29:11,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 14:29:11,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:29:11" (1/1) ... [2022-01-19 14:29:11,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:29:11" (1/1) ... [2022-01-19 14:29:11,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:29:11" (1/1) ... [2022-01-19 14:29:11,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:29:11" (1/1) ... [2022-01-19 14:29:11,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:29:11" (1/1) ... [2022-01-19 14:29:11,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:29:11" (1/1) ... [2022-01-19 14:29:11,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:29:11" (1/1) ... [2022-01-19 14:29:11,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 14:29:11,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 14:29:11,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 14:29:11,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 14:29:11,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:29:11" (1/1) ... [2022-01-19 14:29:11,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:29:11,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:29:11,744 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) [2022-01-19 14:29:11,758 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 [2022-01-19 14:29:11,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 14:29:11,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 14:29:11,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 14:29:11,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 14:29:11,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 14:29:11,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 14:29:11,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 14:29:11,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 14:29:11,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 14:29:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 14:29:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 14:29:11,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 14:29:11,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 14:29:11,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 14:29:11,794 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 14:29:11,880 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 14:29:11,882 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 14:29:11,999 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 14:29:12,027 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 14:29:12,027 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 14:29:12,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:29:12 BoogieIcfgContainer [2022-01-19 14:29:12,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 14:29:12,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 14:29:12,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 14:29:12,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 14:29:12,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:29:11" (1/3) ... [2022-01-19 14:29:12,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20df4271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:29:12, skipping insertion in model container [2022-01-19 14:29:12,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:29:11" (2/3) ... [2022-01-19 14:29:12,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20df4271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:29:12, skipping insertion in model container [2022-01-19 14:29:12,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:29:12" (3/3) ... [2022-01-19 14:29:12,042 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-01-19 14:29:12,045 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 14:29:12,046 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 14:29:12,046 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 14:29:12,095 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,095 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,095 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,096 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,097 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,097 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,098 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,098 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,098 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,098 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,099 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,099 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,099 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,099 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,099 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,099 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,100 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,100 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,100 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,100 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,101 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,101 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,102 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,102 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,103 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,104 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,104 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,104 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,105 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,105 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,105 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,105 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,105 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,105 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,106 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,107 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,107 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,107 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,110 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,111 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,111 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,112 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,116 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,116 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,116 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,116 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:29:12,120 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 14:29:12,158 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 14:29:12,164 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 14:29:12,164 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 14:29:12,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-01-19 14:29:12,208 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-01-19 14:29:12,209 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 14:29:12,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-01-19 14:29:12,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-01-19 14:29:12,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-01-19 14:29:12,239 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2022-01-19 14:29:12,239 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 14:29:12,240 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:29:12,240 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:29:12,241 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:29:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:29:12,245 INFO L85 PathProgramCache]: Analyzing trace with hash 752027129, now seen corresponding path program 1 times [2022-01-19 14:29:12,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:29:12,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13629359] [2022-01-19 14:29:12,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:29:12,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:29:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:12,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:29:12,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13629359] [2022-01-19 14:29:12,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13629359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:29:12,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:29:12,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 14:29:12,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925734063] [2022-01-19 14:29:12,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:29:12,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 14:29:12,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:29:12,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 14:29:12,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-19 14:29:12,700 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2022-01-19 14:29:12,710 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:12,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:29:12,710 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2022-01-19 14:29:12,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:29:12,835 INFO L129 PetriNetUnfolder]: 34/134 cut-off events. [2022-01-19 14:29:12,835 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-01-19 14:29:12,837 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 134 events. 34/134 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 294 event pairs, 9 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 136. Up to 49 conditions per place. [2022-01-19 14:29:12,841 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 20 selfloop transitions, 5 changer transitions 2/74 dead transitions. [2022-01-19 14:29:12,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 217 flow [2022-01-19 14:29:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:29:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:29:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 376 transitions. [2022-01-19 14:29:12,857 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2022-01-19 14:29:12,858 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 376 transitions. [2022-01-19 14:29:12,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 376 transitions. [2022-01-19 14:29:12,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:29:12,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 376 transitions. [2022-01-19 14:29:12,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.666666666666664) internal successors, (376), 6 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:12,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:12,871 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:12,872 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 6 states and 376 transitions. [2022-01-19 14:29:12,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 217 flow [2022-01-19 14:29:12,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 207 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 14:29:12,877 INFO L242 Difference]: Finished difference. Result has 76 places, 68 transitions, 156 flow [2022-01-19 14:29:12,879 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2022-01-19 14:29:12,882 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2022-01-19 14:29:12,882 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 156 flow [2022-01-19 14:29:12,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:12,882 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:29:12,883 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:29:12,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 14:29:12,883 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:29:12,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:29:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash -676251899, now seen corresponding path program 1 times [2022-01-19 14:29:12,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:29:12,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381869063] [2022-01-19 14:29:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:29:12,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:29:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:13,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:29:13,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381869063] [2022-01-19 14:29:13,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381869063] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:29:13,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:29:13,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 14:29:13,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768628632] [2022-01-19 14:29:13,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:29:13,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 14:29:13,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:29:13,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 14:29:13,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-19 14:29:13,019 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 84 [2022-01-19 14:29:13,020 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:13,020 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:29:13,020 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 84 [2022-01-19 14:29:13,020 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:29:13,127 INFO L129 PetriNetUnfolder]: 61/239 cut-off events. [2022-01-19 14:29:13,127 INFO L130 PetriNetUnfolder]: For 23/37 co-relation queries the response was YES. [2022-01-19 14:29:13,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 239 events. 61/239 cut-off events. For 23/37 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 908 event pairs, 26 based on Foata normal form. 12/236 useless extension candidates. Maximal degree in co-relation 220. Up to 75 conditions per place. [2022-01-19 14:29:13,130 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 25 selfloop transitions, 5 changer transitions 1/83 dead transitions. [2022-01-19 14:29:13,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 83 transitions, 266 flow [2022-01-19 14:29:13,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 14:29:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 14:29:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2022-01-19 14:29:13,134 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.830952380952381 [2022-01-19 14:29:13,135 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2022-01-19 14:29:13,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2022-01-19 14:29:13,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:29:13,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2022-01-19 14:29:13,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:13,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:13,140 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:13,140 INFO L186 Difference]: Start difference. First operand has 76 places, 68 transitions, 156 flow. Second operand 5 states and 349 transitions. [2022-01-19 14:29:13,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 83 transitions, 266 flow [2022-01-19 14:29:13,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 256 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 14:29:13,146 INFO L242 Difference]: Finished difference. Result has 76 places, 70 transitions, 172 flow [2022-01-19 14:29:13,146 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2022-01-19 14:29:13,148 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2022-01-19 14:29:13,148 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 172 flow [2022-01-19 14:29:13,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:13,149 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:29:13,149 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:29:13,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 14:29:13,150 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:29:13,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:29:13,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1495906757, now seen corresponding path program 2 times [2022-01-19 14:29:13,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:29:13,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385697415] [2022-01-19 14:29:13,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:29:13,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:29:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:13,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:29:13,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385697415] [2022-01-19 14:29:13,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385697415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:29:13,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749966664] [2022-01-19 14:29:13,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:29:13,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:13,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:29:13,251 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) [2022-01-19 14:29:13,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 14:29:13,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-19 14:29:13,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:29:13,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:29:13,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:29:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:29:13,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 14:29:13,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749966664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:29:13,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 14:29:13,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-01-19 14:29:13,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678426625] [2022-01-19 14:29:13,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:29:13,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 14:29:13,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:29:13,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 14:29:13,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-19 14:29:13,600 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-01-19 14:29:13,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:13,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:29:13,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-01-19 14:29:13,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:29:13,773 INFO L129 PetriNetUnfolder]: 54/189 cut-off events. [2022-01-19 14:29:13,773 INFO L130 PetriNetUnfolder]: For 59/66 co-relation queries the response was YES. [2022-01-19 14:29:13,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 189 events. 54/189 cut-off events. For 59/66 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 594 event pairs, 24 based on Foata normal form. 13/198 useless extension candidates. Maximal degree in co-relation 250. Up to 73 conditions per place. [2022-01-19 14:29:13,777 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 24 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2022-01-19 14:29:13,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 251 flow [2022-01-19 14:29:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 14:29:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 14:29:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2022-01-19 14:29:13,779 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6994047619047619 [2022-01-19 14:29:13,779 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2022-01-19 14:29:13,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2022-01-19 14:29:13,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:29:13,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2022-01-19 14:29:13,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:13,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:13,783 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:13,784 INFO L186 Difference]: Start difference. First operand has 76 places, 70 transitions, 172 flow. Second operand 8 states and 470 transitions. [2022-01-19 14:29:13,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 251 flow [2022-01-19 14:29:13,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 14:29:13,795 INFO L242 Difference]: Finished difference. Result has 79 places, 69 transitions, 172 flow [2022-01-19 14:29:13,796 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2022-01-19 14:29:13,797 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2022-01-19 14:29:13,798 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 172 flow [2022-01-19 14:29:13,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:13,798 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:29:13,798 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:29:13,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 14:29:14,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:14,020 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:29:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:29:14,021 INFO L85 PathProgramCache]: Analyzing trace with hash 352825635, now seen corresponding path program 1 times [2022-01-19 14:29:14,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:29:14,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323787480] [2022-01-19 14:29:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:29:14,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:29:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:14,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:29:14,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323787480] [2022-01-19 14:29:14,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323787480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:29:14,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024973921] [2022-01-19 14:29:14,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:29:14,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:14,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:29:14,264 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) [2022-01-19 14:29:14,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 14:29:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:14,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:29:14,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:29:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:14,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:29:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:29:14,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024973921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:29:14,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:29:14,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 13 [2022-01-19 14:29:14,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052746536] [2022-01-19 14:29:14,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:29:14,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 14:29:14,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:29:14,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 14:29:14,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-19 14:29:14,838 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-01-19 14:29:14,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 56.84615384615385) internal successors, (739), 13 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:14,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:29:14,839 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-01-19 14:29:14,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:29:15,140 INFO L129 PetriNetUnfolder]: 138/484 cut-off events. [2022-01-19 14:29:15,140 INFO L130 PetriNetUnfolder]: For 114/121 co-relation queries the response was YES. [2022-01-19 14:29:15,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 484 events. 138/484 cut-off events. For 114/121 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2579 event pairs, 21 based on Foata normal form. 13/482 useless extension candidates. Maximal degree in co-relation 445. Up to 80 conditions per place. [2022-01-19 14:29:15,144 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 56 selfloop transitions, 23 changer transitions 18/141 dead transitions. [2022-01-19 14:29:15,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 141 transitions, 580 flow [2022-01-19 14:29:15,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 14:29:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 14:29:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 944 transitions. [2022-01-19 14:29:15,147 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2022-01-19 14:29:15,147 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 944 transitions. [2022-01-19 14:29:15,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 944 transitions. [2022-01-19 14:29:15,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:29:15,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 944 transitions. [2022-01-19 14:29:15,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.0) internal successors, (944), 16 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:15,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:15,170 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:15,170 INFO L186 Difference]: Start difference. First operand has 79 places, 69 transitions, 172 flow. Second operand 16 states and 944 transitions. [2022-01-19 14:29:15,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 141 transitions, 580 flow [2022-01-19 14:29:15,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 141 transitions, 558 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-01-19 14:29:15,174 INFO L242 Difference]: Finished difference. Result has 102 places, 92 transitions, 354 flow [2022-01-19 14:29:15,174 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=354, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2022-01-19 14:29:15,175 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 28 predicate places. [2022-01-19 14:29:15,175 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 354 flow [2022-01-19 14:29:15,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.84615384615385) internal successors, (739), 13 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:15,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:29:15,176 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:29:15,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 14:29:15,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-19 14:29:15,396 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:29:15,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:29:15,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1408734365, now seen corresponding path program 2 times [2022-01-19 14:29:15,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:29:15,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134292753] [2022-01-19 14:29:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:29:15,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:29:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:15,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:29:15,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134292753] [2022-01-19 14:29:15,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134292753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:29:15,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682300292] [2022-01-19 14:29:15,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:29:15,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:15,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:29:15,539 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) [2022-01-19 14:29:15,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 14:29:15,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:29:15,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:29:15,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:29:15,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:29:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:15,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:29:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:16,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682300292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:29:16,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:29:16,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2022-01-19 14:29:16,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618670904] [2022-01-19 14:29:16,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:29:16,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 14:29:16,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:29:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 14:29:16,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-19 14:29:16,173 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:29:16,174 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 354 flow. Second operand has 16 states, 16 states have (on average 64.25) internal successors, (1028), 16 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:16,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:29:16,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:29:16,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:29:16,940 INFO L129 PetriNetUnfolder]: 339/894 cut-off events. [2022-01-19 14:29:16,940 INFO L130 PetriNetUnfolder]: For 1635/1638 co-relation queries the response was YES. [2022-01-19 14:29:16,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2808 conditions, 894 events. 339/894 cut-off events. For 1635/1638 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5089 event pairs, 9 based on Foata normal form. 18/911 useless extension candidates. Maximal degree in co-relation 2779. Up to 186 conditions per place. [2022-01-19 14:29:16,948 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 78 selfloop transitions, 104 changer transitions 10/251 dead transitions. [2022-01-19 14:29:16,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 251 transitions, 1675 flow [2022-01-19 14:29:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-19 14:29:16,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-01-19 14:29:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2124 transitions. [2022-01-19 14:29:16,953 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7901785714285714 [2022-01-19 14:29:16,954 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2124 transitions. [2022-01-19 14:29:16,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2124 transitions. [2022-01-19 14:29:16,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:29:16,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2124 transitions. [2022-01-19 14:29:16,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 66.375) internal successors, (2124), 32 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:16,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:16,964 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:16,964 INFO L186 Difference]: Start difference. First operand has 102 places, 92 transitions, 354 flow. Second operand 32 states and 2124 transitions. [2022-01-19 14:29:16,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 251 transitions, 1675 flow [2022-01-19 14:29:16,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 251 transitions, 1667 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-01-19 14:29:16,977 INFO L242 Difference]: Finished difference. Result has 146 places, 179 transitions, 1339 flow [2022-01-19 14:29:16,977 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1339, PETRI_PLACES=146, PETRI_TRANSITIONS=179} [2022-01-19 14:29:16,978 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 72 predicate places. [2022-01-19 14:29:16,978 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 179 transitions, 1339 flow [2022-01-19 14:29:16,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.25) internal successors, (1028), 16 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:16,979 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:29:16,979 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:29:17,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 14:29:17,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:17,200 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:29:17,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:29:17,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1501259667, now seen corresponding path program 3 times [2022-01-19 14:29:17,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:29:17,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245258967] [2022-01-19 14:29:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:29:17,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:29:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:17,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:29:17,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245258967] [2022-01-19 14:29:17,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245258967] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:29:17,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168273903] [2022-01-19 14:29:17,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:29:17,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:17,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:29:17,337 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) [2022-01-19 14:29:17,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 14:29:17,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 14:29:17,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:29:17,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:29:17,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:29:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:17,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:29:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:18,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168273903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:29:18,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:29:18,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 14:29:18,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472253011] [2022-01-19 14:29:18,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:29:18,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:29:18,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:29:18,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:29:18,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:29:18,376 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:29:18,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 179 transitions, 1339 flow. Second operand has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:18,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:29:18,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:29:18,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:29:19,303 INFO L129 PetriNetUnfolder]: 429/1093 cut-off events. [2022-01-19 14:29:19,303 INFO L130 PetriNetUnfolder]: For 8495/8502 co-relation queries the response was YES. [2022-01-19 14:29:19,309 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5644 conditions, 1093 events. 429/1093 cut-off events. For 8495/8502 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6293 event pairs, 7 based on Foata normal form. 4/1094 useless extension candidates. Maximal degree in co-relation 5448. Up to 278 conditions per place. [2022-01-19 14:29:19,316 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 132 selfloop transitions, 199 changer transitions 4/394 dead transitions. [2022-01-19 14:29:19,316 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 394 transitions, 4442 flow [2022-01-19 14:29:19,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-19 14:29:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-01-19 14:29:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1973 transitions. [2022-01-19 14:29:19,321 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7829365079365079 [2022-01-19 14:29:19,321 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1973 transitions. [2022-01-19 14:29:19,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1973 transitions. [2022-01-19 14:29:19,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:29:19,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1973 transitions. [2022-01-19 14:29:19,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 65.76666666666667) internal successors, (1973), 30 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:19,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:19,331 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:19,331 INFO L186 Difference]: Start difference. First operand has 146 places, 179 transitions, 1339 flow. Second operand 30 states and 1973 transitions. [2022-01-19 14:29:19,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 394 transitions, 4442 flow [2022-01-19 14:29:19,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 394 transitions, 4170 flow, removed 129 selfloop flow, removed 2 redundant places. [2022-01-19 14:29:19,383 INFO L242 Difference]: Finished difference. Result has 190 places, 328 transitions, 3650 flow [2022-01-19 14:29:19,383 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3650, PETRI_PLACES=190, PETRI_TRANSITIONS=328} [2022-01-19 14:29:19,385 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 116 predicate places. [2022-01-19 14:29:19,386 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 328 transitions, 3650 flow [2022-01-19 14:29:19,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:19,386 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:29:19,386 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:29:19,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 14:29:19,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:19,603 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:29:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:29:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1484681127, now seen corresponding path program 4 times [2022-01-19 14:29:19,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:29:19,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116964887] [2022-01-19 14:29:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:29:19,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:29:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:19,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:29:19,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116964887] [2022-01-19 14:29:19,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116964887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:29:19,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280720818] [2022-01-19 14:29:19,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:29:19,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:19,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:29:19,790 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) [2022-01-19 14:29:19,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 14:29:19,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:29:19,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:29:19,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:29:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:29:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:20,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:29:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:20,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280720818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:29:20,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:29:20,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-01-19 14:29:20,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376894421] [2022-01-19 14:29:20,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:29:20,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 14:29:20,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:29:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 14:29:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-01-19 14:29:20,817 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:29:20,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 328 transitions, 3650 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:20,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:29:20,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:29:20,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:29:21,611 INFO L129 PetriNetUnfolder]: 565/1466 cut-off events. [2022-01-19 14:29:21,611 INFO L130 PetriNetUnfolder]: For 16785/16799 co-relation queries the response was YES. [2022-01-19 14:29:21,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8985 conditions, 1466 events. 565/1466 cut-off events. For 16785/16799 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9358 event pairs, 14 based on Foata normal form. 8/1471 useless extension candidates. Maximal degree in co-relation 8675. Up to 356 conditions per place. [2022-01-19 14:29:21,634 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 145 selfloop transitions, 272 changer transitions 6/482 dead transitions. [2022-01-19 14:29:21,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 482 transitions, 6693 flow [2022-01-19 14:29:21,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-19 14:29:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-01-19 14:29:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1451 transitions. [2022-01-19 14:29:21,639 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7851731601731602 [2022-01-19 14:29:21,639 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1451 transitions. [2022-01-19 14:29:21,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1451 transitions. [2022-01-19 14:29:21,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:29:21,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1451 transitions. [2022-01-19 14:29:21,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.95454545454545) internal successors, (1451), 22 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:21,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:21,648 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:21,648 INFO L186 Difference]: Start difference. First operand has 190 places, 328 transitions, 3650 flow. Second operand 22 states and 1451 transitions. [2022-01-19 14:29:21,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 482 transitions, 6693 flow [2022-01-19 14:29:21,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 482 transitions, 5998 flow, removed 232 selfloop flow, removed 11 redundant places. [2022-01-19 14:29:21,775 INFO L242 Difference]: Finished difference. Result has 209 places, 433 transitions, 5722 flow [2022-01-19 14:29:21,775 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5722, PETRI_PLACES=209, PETRI_TRANSITIONS=433} [2022-01-19 14:29:21,776 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 135 predicate places. [2022-01-19 14:29:21,776 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 433 transitions, 5722 flow [2022-01-19 14:29:21,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:21,777 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:29:21,777 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:29:21,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 14:29:21,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:21,999 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:29:21,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:29:21,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1139541701, now seen corresponding path program 5 times [2022-01-19 14:29:22,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:29:22,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241880747] [2022-01-19 14:29:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:29:22,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:29:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:22,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:29:22,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241880747] [2022-01-19 14:29:22,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241880747] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:29:22,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809593549] [2022-01-19 14:29:22,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:29:22,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:22,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:29:22,256 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) [2022-01-19 14:29:22,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 14:29:22,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:29:22,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:29:22,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 14:29:22,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:29:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:22,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:29:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:23,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809593549] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:29:23,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:29:23,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2022-01-19 14:29:23,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5013699] [2022-01-19 14:29:23,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:29:23,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 14:29:23,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:29:23,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 14:29:23,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-19 14:29:23,038 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:29:23,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 433 transitions, 5722 flow. Second operand has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:23,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:29:23,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:29:23,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:29:27,330 INFO L129 PetriNetUnfolder]: 744/2072 cut-off events. [2022-01-19 14:29:27,330 INFO L130 PetriNetUnfolder]: For 22908/22916 co-relation queries the response was YES. [2022-01-19 14:29:27,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11960 conditions, 2072 events. 744/2072 cut-off events. For 22908/22916 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15157 event pairs, 13 based on Foata normal form. 26/2087 useless extension candidates. Maximal degree in co-relation 11614. Up to 464 conditions per place. [2022-01-19 14:29:27,369 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 125 selfloop transitions, 575 changer transitions 4/763 dead transitions. [2022-01-19 14:29:27,369 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 763 transitions, 12180 flow [2022-01-19 14:29:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-19 14:29:27,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-01-19 14:29:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5211 transitions. [2022-01-19 14:29:27,377 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7754464285714285 [2022-01-19 14:29:27,377 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5211 transitions. [2022-01-19 14:29:27,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5211 transitions. [2022-01-19 14:29:27,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:29:27,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5211 transitions. [2022-01-19 14:29:27,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 65.1375) internal successors, (5211), 80 states have internal predecessors, (5211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:27,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 84.0) internal successors, (6804), 81 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:27,406 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 84.0) internal successors, (6804), 81 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:27,406 INFO L186 Difference]: Start difference. First operand has 209 places, 433 transitions, 5722 flow. Second operand 80 states and 5211 transitions. [2022-01-19 14:29:27,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 763 transitions, 12180 flow [2022-01-19 14:29:27,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 763 transitions, 11762 flow, removed 201 selfloop flow, removed 3 redundant places. [2022-01-19 14:29:27,559 INFO L242 Difference]: Finished difference. Result has 295 places, 683 transitions, 10861 flow [2022-01-19 14:29:27,559 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5548, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=10861, PETRI_PLACES=295, PETRI_TRANSITIONS=683} [2022-01-19 14:29:27,562 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 221 predicate places. [2022-01-19 14:29:27,562 INFO L470 AbstractCegarLoop]: Abstraction has has 295 places, 683 transitions, 10861 flow [2022-01-19 14:29:27,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:27,563 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:29:27,563 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:29:27,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 14:29:27,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:27,786 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:29:27,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:29:27,786 INFO L85 PathProgramCache]: Analyzing trace with hash 115301975, now seen corresponding path program 6 times [2022-01-19 14:29:27,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:29:27,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75593239] [2022-01-19 14:29:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:29:27,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:29:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:27,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:29:27,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75593239] [2022-01-19 14:29:27,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75593239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:29:27,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121085415] [2022-01-19 14:29:27,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:29:27,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:27,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:29:27,909 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) [2022-01-19 14:29:27,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 14:29:27,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 14:29:27,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:29:27,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:29:27,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:29:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:28,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:29:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:28,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121085415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:29:28,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:29:28,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 14:29:28,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412076119] [2022-01-19 14:29:28,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:29:28,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:29:28,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:29:28,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:29:28,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:29:28,893 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:29:28,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 683 transitions, 10861 flow. Second operand has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:28,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:29:28,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:29:28,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:29:30,284 INFO L129 PetriNetUnfolder]: 893/2411 cut-off events. [2022-01-19 14:29:30,284 INFO L130 PetriNetUnfolder]: For 28464/28474 co-relation queries the response was YES. [2022-01-19 14:29:30,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15655 conditions, 2411 events. 893/2411 cut-off events. For 28464/28474 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18368 event pairs, 18 based on Foata normal form. 11/2409 useless extension candidates. Maximal degree in co-relation 15504. Up to 573 conditions per place. [2022-01-19 14:29:30,329 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 258 selfloop transitions, 535 changer transitions 3/855 dead transitions. [2022-01-19 14:29:30,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 855 transitions, 15612 flow [2022-01-19 14:29:30,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-19 14:29:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-01-19 14:29:30,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2315 transitions. [2022-01-19 14:29:30,333 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7874149659863946 [2022-01-19 14:29:30,333 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2315 transitions. [2022-01-19 14:29:30,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2315 transitions. [2022-01-19 14:29:30,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:29:30,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2315 transitions. [2022-01-19 14:29:30,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 66.14285714285714) internal successors, (2315), 35 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:30,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:30,341 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:30,341 INFO L186 Difference]: Start difference. First operand has 295 places, 683 transitions, 10861 flow. Second operand 35 states and 2315 transitions. [2022-01-19 14:29:30,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 855 transitions, 15612 flow [2022-01-19 14:29:30,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 855 transitions, 13786 flow, removed 797 selfloop flow, removed 13 redundant places. [2022-01-19 14:29:30,566 INFO L242 Difference]: Finished difference. Result has 324 places, 791 transitions, 13091 flow [2022-01-19 14:29:30,566 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=9443, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13091, PETRI_PLACES=324, PETRI_TRANSITIONS=791} [2022-01-19 14:29:30,567 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 250 predicate places. [2022-01-19 14:29:30,567 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 791 transitions, 13091 flow [2022-01-19 14:29:30,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:30,568 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:29:30,568 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:29:30,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 14:29:30,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:30,788 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:29:30,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:29:30,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1392148443, now seen corresponding path program 7 times [2022-01-19 14:29:30,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:29:30,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110744025] [2022-01-19 14:29:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:29:30,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:29:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:30,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:29:30,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110744025] [2022-01-19 14:29:30,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110744025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:29:30,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804316326] [2022-01-19 14:29:30,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:29:30,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:30,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:29:31,000 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:29:31,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 14:29:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:31,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:29:31,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:29:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:31,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:29:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:31,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804316326] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:29:31,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:29:31,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 14:29:31,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298401630] [2022-01-19 14:29:31,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:29:31,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:29:31,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:29:31,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:29:31,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:29:31,926 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:29:31,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 791 transitions, 13091 flow. Second operand has 19 states, 19 states have (on average 64.47368421052632) internal successors, (1225), 19 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:31,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:29:31,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:29:31,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:29:34,044 INFO L129 PetriNetUnfolder]: 1325/3751 cut-off events. [2022-01-19 14:29:34,044 INFO L130 PetriNetUnfolder]: For 38022/38032 co-relation queries the response was YES. [2022-01-19 14:29:34,086 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24373 conditions, 3751 events. 1325/3751 cut-off events. For 38022/38032 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 32178 event pairs, 26 based on Foata normal form. 42/3772 useless extension candidates. Maximal degree in co-relation 23940. Up to 842 conditions per place. [2022-01-19 14:29:34,119 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 307 selfloop transitions, 965 changer transitions 1/1332 dead transitions. [2022-01-19 14:29:34,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1332 transitions, 24881 flow [2022-01-19 14:29:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 14:29:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 14:29:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2724 transitions. [2022-01-19 14:29:34,132 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7909407665505227 [2022-01-19 14:29:34,132 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2724 transitions. [2022-01-19 14:29:34,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2724 transitions. [2022-01-19 14:29:34,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:29:34,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2724 transitions. [2022-01-19 14:29:34,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 66.4390243902439) internal successors, (2724), 41 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:34,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:34,143 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:34,144 INFO L186 Difference]: Start difference. First operand has 324 places, 791 transitions, 13091 flow. Second operand 41 states and 2724 transitions. [2022-01-19 14:29:34,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1332 transitions, 24881 flow [2022-01-19 14:29:34,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1332 transitions, 24531 flow, removed 76 selfloop flow, removed 13 redundant places. [2022-01-19 14:29:34,527 INFO L242 Difference]: Finished difference. Result has 366 places, 1202 transitions, 24247 flow [2022-01-19 14:29:34,528 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=12841, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=24247, PETRI_PLACES=366, PETRI_TRANSITIONS=1202} [2022-01-19 14:29:34,529 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 292 predicate places. [2022-01-19 14:29:34,529 INFO L470 AbstractCegarLoop]: Abstraction has has 366 places, 1202 transitions, 24247 flow [2022-01-19 14:29:34,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.47368421052632) internal successors, (1225), 19 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:34,529 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:29:34,529 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:29:34,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 14:29:34,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-19 14:29:34,747 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:29:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:29:34,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1798251347, now seen corresponding path program 8 times [2022-01-19 14:29:34,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:29:34,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795849594] [2022-01-19 14:29:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:29:34,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:29:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:34,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:29:34,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795849594] [2022-01-19 14:29:34,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795849594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:29:34,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164424259] [2022-01-19 14:29:34,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:29:34,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:34,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:29:34,996 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:29:34,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 14:29:35,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:29:35,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:29:35,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:29:35,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:29:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:35,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:29:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:35,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164424259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:29:35,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:29:35,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-01-19 14:29:35,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690602742] [2022-01-19 14:29:35,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:29:35,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 14:29:35,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:29:35,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 14:29:35,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-19 14:29:35,915 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:29:35,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1202 transitions, 24247 flow. Second operand has 18 states, 18 states have (on average 64.61111111111111) internal successors, (1163), 18 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:35,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:29:35,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:29:35,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:29:40,324 INFO L129 PetriNetUnfolder]: 1730/5158 cut-off events. [2022-01-19 14:29:40,324 INFO L130 PetriNetUnfolder]: For 67516/67527 co-relation queries the response was YES. [2022-01-19 14:29:40,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36918 conditions, 5158 events. 1730/5158 cut-off events. For 67516/67527 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 48799 event pairs, 32 based on Foata normal form. 50/5185 useless extension candidates. Maximal degree in co-relation 36457. Up to 1021 conditions per place. [2022-01-19 14:29:40,402 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 290 selfloop transitions, 1430 changer transitions 1/1780 dead transitions. [2022-01-19 14:29:40,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1780 transitions, 38888 flow [2022-01-19 14:29:40,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-19 14:29:40,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-01-19 14:29:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4884 transitions. [2022-01-19 14:29:40,408 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-01-19 14:29:40,408 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4884 transitions. [2022-01-19 14:29:40,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4884 transitions. [2022-01-19 14:29:40,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:29:40,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4884 transitions. [2022-01-19 14:29:40,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 66.0) internal successors, (4884), 74 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:40,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 84.0) internal successors, (6300), 75 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:40,422 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 84.0) internal successors, (6300), 75 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:40,422 INFO L186 Difference]: Start difference. First operand has 366 places, 1202 transitions, 24247 flow. Second operand 74 states and 4884 transitions. [2022-01-19 14:29:40,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1780 transitions, 38888 flow [2022-01-19 14:29:41,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1780 transitions, 38263 flow, removed 281 selfloop flow, removed 6 redundant places. [2022-01-19 14:29:41,139 INFO L242 Difference]: Finished difference. Result has 456 places, 1692 transitions, 38936 flow [2022-01-19 14:29:41,140 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=23841, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=996, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=38936, PETRI_PLACES=456, PETRI_TRANSITIONS=1692} [2022-01-19 14:29:41,141 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 382 predicate places. [2022-01-19 14:29:41,141 INFO L470 AbstractCegarLoop]: Abstraction has has 456 places, 1692 transitions, 38936 flow [2022-01-19 14:29:41,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.61111111111111) internal successors, (1163), 18 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:41,141 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:29:41,141 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:29:41,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-19 14:29:41,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:41,342 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:29:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:29:41,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1780276453, now seen corresponding path program 9 times [2022-01-19 14:29:41,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:29:41,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593230126] [2022-01-19 14:29:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:29:41,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:29:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:41,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:29:41,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593230126] [2022-01-19 14:29:41,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593230126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:29:41,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743125670] [2022-01-19 14:29:41,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:29:41,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:41,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:29:41,485 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:29:41,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 14:29:41,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 14:29:41,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:29:41,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:29:41,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:29:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:41,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:29:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:42,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743125670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:29:42,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:29:42,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-01-19 14:29:42,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12840931] [2022-01-19 14:29:42,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:29:42,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 14:29:42,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:29:42,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 14:29:42,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-19 14:29:42,266 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:29:42,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 1692 transitions, 38936 flow. Second operand has 17 states, 17 states have (on average 64.3529411764706) internal successors, (1094), 17 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:42,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:29:42,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:29:42,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:29:48,277 INFO L129 PetriNetUnfolder]: 2165/6901 cut-off events. [2022-01-19 14:29:48,278 INFO L130 PetriNetUnfolder]: For 109212/109246 co-relation queries the response was YES. [2022-01-19 14:29:48,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53927 conditions, 6901 events. 2165/6901 cut-off events. For 109212/109246 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 71029 event pairs, 51 based on Foata normal form. 48/6919 useless extension candidates. Maximal degree in co-relation 53539. Up to 1270 conditions per place. [2022-01-19 14:29:48,496 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 341 selfloop transitions, 1813 changer transitions 6/2219 dead transitions. [2022-01-19 14:29:48,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 2219 transitions, 55344 flow [2022-01-19 14:29:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-19 14:29:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-01-19 14:29:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4529 transitions. [2022-01-19 14:29:48,503 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7814009661835749 [2022-01-19 14:29:48,503 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4529 transitions. [2022-01-19 14:29:48,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4529 transitions. [2022-01-19 14:29:48,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:29:48,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4529 transitions. [2022-01-19 14:29:48,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 65.6376811594203) internal successors, (4529), 69 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:48,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 84.0) internal successors, (5880), 70 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:48,525 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 84.0) internal successors, (5880), 70 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:48,525 INFO L186 Difference]: Start difference. First operand has 456 places, 1692 transitions, 38936 flow. Second operand 69 states and 4529 transitions. [2022-01-19 14:29:48,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 2219 transitions, 55344 flow [2022-01-19 14:29:50,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 2219 transitions, 54174 flow, removed 373 selfloop flow, removed 12 redundant places. [2022-01-19 14:29:50,284 INFO L242 Difference]: Finished difference. Result has 534 places, 2128 transitions, 55517 flow [2022-01-19 14:29:50,286 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=38095, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=55517, PETRI_PLACES=534, PETRI_TRANSITIONS=2128} [2022-01-19 14:29:50,286 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 460 predicate places. [2022-01-19 14:29:50,287 INFO L470 AbstractCegarLoop]: Abstraction has has 534 places, 2128 transitions, 55517 flow [2022-01-19 14:29:50,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.3529411764706) internal successors, (1094), 17 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:50,287 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:29:50,287 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:29:50,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 14:29:50,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 14:29:50,488 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:29:50,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:29:50,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1526211693, now seen corresponding path program 10 times [2022-01-19 14:29:50,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:29:50,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868085083] [2022-01-19 14:29:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:29:50,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:29:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:29:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:50,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:29:50,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868085083] [2022-01-19 14:29:50,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868085083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:29:50,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287449936] [2022-01-19 14:29:50,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:29:50,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:29:50,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:29:50,608 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:29:50,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 14:29:50,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:29:50,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:29:50,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:29:50,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:29:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:50,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:29:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:29:51,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287449936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:29:51,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:29:51,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2022-01-19 14:29:51,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693480122] [2022-01-19 14:29:51,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:29:51,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 14:29:51,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:29:51,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 14:29:51,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-19 14:29:51,648 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:29:51,649 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 2128 transitions, 55517 flow. Second operand has 20 states, 20 states have (on average 64.4) internal successors, (1288), 20 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:51,649 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:29:51,649 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:29:51,649 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:29:57,665 INFO L129 PetriNetUnfolder]: 2673/8808 cut-off events. [2022-01-19 14:29:57,665 INFO L130 PetriNetUnfolder]: For 160773/160807 co-relation queries the response was YES. [2022-01-19 14:29:57,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73863 conditions, 8808 events. 2673/8808 cut-off events. For 160773/160807 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 96294 event pairs, 49 based on Foata normal form. 47/8823 useless extension candidates. Maximal degree in co-relation 73549. Up to 1515 conditions per place. [2022-01-19 14:29:57,805 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 465 selfloop transitions, 2275 changer transitions 4/2803 dead transitions. [2022-01-19 14:29:57,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 2803 transitions, 78161 flow [2022-01-19 14:29:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-19 14:29:57,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-01-19 14:29:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3050 transitions. [2022-01-19 14:29:57,809 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7893374741200828 [2022-01-19 14:29:57,809 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3050 transitions. [2022-01-19 14:29:57,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3050 transitions. [2022-01-19 14:29:57,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:29:57,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3050 transitions. [2022-01-19 14:29:57,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 66.30434782608695) internal successors, (3050), 46 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:57,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:57,817 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:29:57,818 INFO L186 Difference]: Start difference. First operand has 534 places, 2128 transitions, 55517 flow. Second operand 46 states and 3050 transitions. [2022-01-19 14:29:57,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 2803 transitions, 78161 flow [2022-01-19 14:30:00,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 2803 transitions, 77665 flow, removed 93 selfloop flow, removed 27 redundant places. [2022-01-19 14:30:00,922 INFO L242 Difference]: Finished difference. Result has 563 places, 2696 transitions, 78965 flow [2022-01-19 14:30:00,925 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=55027, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1733, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=78965, PETRI_PLACES=563, PETRI_TRANSITIONS=2696} [2022-01-19 14:30:00,925 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 489 predicate places. [2022-01-19 14:30:00,925 INFO L470 AbstractCegarLoop]: Abstraction has has 563 places, 2696 transitions, 78965 flow [2022-01-19 14:30:00,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.4) internal successors, (1288), 20 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:30:00,926 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:30:00,926 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:30:00,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 14:30:01,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 14:30:01,145 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:30:01,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:30:01,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1865017427, now seen corresponding path program 11 times [2022-01-19 14:30:01,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:30:01,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654117148] [2022-01-19 14:30:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:30:01,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:30:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:30:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:30:01,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:30:01,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654117148] [2022-01-19 14:30:01,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654117148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:30:01,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492300318] [2022-01-19 14:30:01,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:30:01,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:30:01,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:30:01,284 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:30:01,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 14:30:01,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 14:30:01,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:30:01,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 14:30:01,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:30:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:30:01,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:30:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:30:01,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492300318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:30:01,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:30:01,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2022-01-19 14:30:01,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421016227] [2022-01-19 14:30:01,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:30:01,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 14:30:01,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:30:01,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 14:30:01,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-19 14:30:01,988 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:30:01,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 2696 transitions, 78965 flow. Second operand has 20 states, 20 states have (on average 64.05) internal successors, (1281), 20 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:30:01,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:30:01,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:30:01,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:30:10,322 INFO L129 PetriNetUnfolder]: 2922/9768 cut-off events. [2022-01-19 14:30:10,323 INFO L130 PetriNetUnfolder]: For 227983/227996 co-relation queries the response was YES. [2022-01-19 14:30:10,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90562 conditions, 9768 events. 2922/9768 cut-off events. For 227983/227996 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 109936 event pairs, 204 based on Foata normal form. 65/9720 useless extension candidates. Maximal degree in co-relation 89656. Up to 1634 conditions per place. [2022-01-19 14:30:10,493 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 555 selfloop transitions, 2527 changer transitions 14/3155 dead transitions. [2022-01-19 14:30:10,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 3155 transitions, 98752 flow [2022-01-19 14:30:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 14:30:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 14:30:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3724 transitions. [2022-01-19 14:30:10,497 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2022-01-19 14:30:10,497 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3724 transitions. [2022-01-19 14:30:10,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3724 transitions. [2022-01-19 14:30:10,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:30:10,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3724 transitions. [2022-01-19 14:30:10,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 65.33333333333333) internal successors, (3724), 57 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:30:10,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:30:10,508 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:30:10,508 INFO L186 Difference]: Start difference. First operand has 563 places, 2696 transitions, 78965 flow. Second operand 57 states and 3724 transitions. [2022-01-19 14:30:10,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 3155 transitions, 98752 flow [2022-01-19 14:30:15,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 3155 transitions, 98007 flow, removed 204 selfloop flow, removed 19 redundant places. [2022-01-19 14:30:15,513 INFO L242 Difference]: Finished difference. Result has 612 places, 3077 transitions, 98324 flow [2022-01-19 14:30:15,515 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=77521, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=98324, PETRI_PLACES=612, PETRI_TRANSITIONS=3077} [2022-01-19 14:30:15,516 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 538 predicate places. [2022-01-19 14:30:15,516 INFO L470 AbstractCegarLoop]: Abstraction has has 612 places, 3077 transitions, 98324 flow [2022-01-19 14:30:15,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.05) internal successors, (1281), 20 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:30:15,516 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:30:15,516 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:30:15,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 14:30:15,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 14:30:15,718 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:30:15,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:30:15,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1298955597, now seen corresponding path program 12 times [2022-01-19 14:30:15,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:30:15,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996863675] [2022-01-19 14:30:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:30:15,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:30:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:30:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:30:15,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:30:15,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996863675] [2022-01-19 14:30:15,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996863675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:30:15,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374764239] [2022-01-19 14:30:15,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:30:15,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:30:15,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:30:15,856 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:30:15,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 14:30:15,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 14:30:15,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:30:15,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:30:15,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:30:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:30:16,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:31:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:31:31,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374764239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:31:31,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:31:31,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-19 14:31:31,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990276506] [2022-01-19 14:31:31,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:31:31,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 14:31:31,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:31:31,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 14:31:31,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-19 14:31:31,115 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:31:31,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 3077 transitions, 98324 flow. Second operand has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:31:31,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:31:31,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:31:31,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:31:42,093 INFO L129 PetriNetUnfolder]: 2963/9964 cut-off events. [2022-01-19 14:31:42,094 INFO L130 PetriNetUnfolder]: For 269501/269524 co-relation queries the response was YES. [2022-01-19 14:31:42,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98782 conditions, 9964 events. 2963/9964 cut-off events. For 269501/269524 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 112512 event pairs, 51 based on Foata normal form. 21/9951 useless extension candidates. Maximal degree in co-relation 98062. Up to 1667 conditions per place. [2022-01-19 14:31:42,353 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 315 selfloop transitions, 2831 changer transitions 5/3210 dead transitions. [2022-01-19 14:31:42,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 3210 transitions, 108474 flow [2022-01-19 14:31:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 14:31:42,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 14:31:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3720 transitions. [2022-01-19 14:31:42,357 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7769423558897243 [2022-01-19 14:31:42,357 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3720 transitions. [2022-01-19 14:31:42,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3720 transitions. [2022-01-19 14:31:42,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:31:42,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3720 transitions. [2022-01-19 14:31:42,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 65.26315789473684) internal successors, (3720), 57 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:31:42,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:31:42,367 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:31:42,367 INFO L186 Difference]: Start difference. First operand has 612 places, 3077 transitions, 98324 flow. Second operand 57 states and 3720 transitions. [2022-01-19 14:31:42,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 3210 transitions, 108474 flow [2022-01-19 14:31:46,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 3210 transitions, 106468 flow, removed 229 selfloop flow, removed 19 redundant places. [2022-01-19 14:31:47,021 INFO L242 Difference]: Finished difference. Result has 656 places, 3181 transitions, 107916 flow [2022-01-19 14:31:47,023 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=96063, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3065, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2719, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=107916, PETRI_PLACES=656, PETRI_TRANSITIONS=3181} [2022-01-19 14:31:47,023 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 582 predicate places. [2022-01-19 14:31:47,023 INFO L470 AbstractCegarLoop]: Abstraction has has 656 places, 3181 transitions, 107916 flow [2022-01-19 14:31:47,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:31:47,023 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:31:47,024 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:31:47,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 14:31:47,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 14:31:47,224 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:31:47,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:31:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash -808919107, now seen corresponding path program 13 times [2022-01-19 14:31:47,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:31:47,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177614838] [2022-01-19 14:31:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:31:47,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:31:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:31:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:31:47,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:31:47,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177614838] [2022-01-19 14:31:47,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177614838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:31:47,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904168024] [2022-01-19 14:31:47,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:31:47,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:31:47,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:31:47,352 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:31:47,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 14:31:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:31:47,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:31:47,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:31:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:31:47,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:31:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:31:48,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904168024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:31:48,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:31:48,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-01-19 14:31:48,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747146873] [2022-01-19 14:31:48,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:31:48,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 14:31:48,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:31:48,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 14:31:48,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-01-19 14:31:48,180 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:31:48,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 3181 transitions, 107916 flow. Second operand has 17 states, 17 states have (on average 64.41176470588235) internal successors, (1095), 17 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:31:48,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:31:48,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:31:48,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:31:59,203 INFO L129 PetriNetUnfolder]: 3516/11658 cut-off events. [2022-01-19 14:31:59,203 INFO L130 PetriNetUnfolder]: For 335548/335572 co-relation queries the response was YES. [2022-01-19 14:31:59,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124079 conditions, 11658 events. 3516/11658 cut-off events. For 335548/335572 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 135553 event pairs, 62 based on Foata normal form. 113/11727 useless extension candidates. Maximal degree in co-relation 123132. Up to 1948 conditions per place. [2022-01-19 14:31:59,407 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 1013 selfloop transitions, 2861 changer transitions 5/3938 dead transitions. [2022-01-19 14:31:59,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 3938 transitions, 142554 flow [2022-01-19 14:31:59,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-19 14:31:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-01-19 14:31:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2805 transitions. [2022-01-19 14:31:59,410 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7950680272108843 [2022-01-19 14:31:59,410 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2805 transitions. [2022-01-19 14:31:59,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2805 transitions. [2022-01-19 14:31:59,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:31:59,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2805 transitions. [2022-01-19 14:31:59,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 66.78571428571429) internal successors, (2805), 42 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:31:59,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:31:59,415 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:31:59,416 INFO L186 Difference]: Start difference. First operand has 656 places, 3181 transitions, 107916 flow. Second operand 42 states and 2805 transitions. [2022-01-19 14:31:59,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 3938 transitions, 142554 flow [2022-01-19 14:32:06,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 3938 transitions, 140551 flow, removed 248 selfloop flow, removed 21 redundant places. [2022-01-19 14:32:06,799 INFO L242 Difference]: Finished difference. Result has 694 places, 3688 transitions, 136903 flow [2022-01-19 14:32:06,801 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=106019, PETRI_DIFFERENCE_MINUEND_PLACES=632, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=136903, PETRI_PLACES=694, PETRI_TRANSITIONS=3688} [2022-01-19 14:32:06,802 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 620 predicate places. [2022-01-19 14:32:06,802 INFO L470 AbstractCegarLoop]: Abstraction has has 694 places, 3688 transitions, 136903 flow [2022-01-19 14:32:06,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.41176470588235) internal successors, (1095), 17 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:32:06,802 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:32:06,802 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:32:06,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-19 14:32:07,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:32:07,009 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:32:07,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:32:07,009 INFO L85 PathProgramCache]: Analyzing trace with hash 525738553, now seen corresponding path program 14 times [2022-01-19 14:32:07,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:32:07,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823798387] [2022-01-19 14:32:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:32:07,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:32:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:32:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:32:07,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:32:07,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823798387] [2022-01-19 14:32:07,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823798387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:32:07,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485036046] [2022-01-19 14:32:07,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:32:07,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:32:07,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:32:07,120 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:32:07,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 14:32:07,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:32:07,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:32:07,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:32:07,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:32:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:32:07,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:32:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:32:07,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485036046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:32:07,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:32:07,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 14:32:07,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196296210] [2022-01-19 14:32:07,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:32:07,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:32:07,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:32:07,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:32:07,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:32:07,972 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:32:07,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 694 places, 3688 transitions, 136903 flow. Second operand has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:32:07,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:32:07,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:32:07,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:32:20,862 INFO L129 PetriNetUnfolder]: 3558/11611 cut-off events. [2022-01-19 14:32:20,862 INFO L130 PetriNetUnfolder]: For 409108/409147 co-relation queries the response was YES. [2022-01-19 14:32:21,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133396 conditions, 11611 events. 3558/11611 cut-off events. For 409108/409147 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 134201 event pairs, 416 based on Foata normal form. 37/11481 useless extension candidates. Maximal degree in co-relation 132702. Up to 2926 conditions per place. [2022-01-19 14:32:21,259 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1368 selfloop transitions, 2377 changer transitions 5/3809 dead transitions. [2022-01-19 14:32:21,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 3809 transitions, 148469 flow [2022-01-19 14:32:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-19 14:32:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-01-19 14:32:21,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1665 transitions. [2022-01-19 14:32:21,260 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7928571428571428 [2022-01-19 14:32:21,260 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1665 transitions. [2022-01-19 14:32:21,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1665 transitions. [2022-01-19 14:32:21,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:32:21,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1665 transitions. [2022-01-19 14:32:21,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 66.6) internal successors, (1665), 25 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:32:21,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:32:21,265 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:32:21,265 INFO L186 Difference]: Start difference. First operand has 694 places, 3688 transitions, 136903 flow. Second operand 25 states and 1665 transitions. [2022-01-19 14:32:21,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 3809 transitions, 148469 flow [2022-01-19 14:32:29,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 3809 transitions, 146418 flow, removed 216 selfloop flow, removed 23 redundant places. [2022-01-19 14:32:29,901 INFO L242 Difference]: Finished difference. Result has 701 places, 3747 transitions, 146411 flow [2022-01-19 14:32:29,903 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=133464, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=146411, PETRI_PLACES=701, PETRI_TRANSITIONS=3747} [2022-01-19 14:32:29,904 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 627 predicate places. [2022-01-19 14:32:29,904 INFO L470 AbstractCegarLoop]: Abstraction has has 701 places, 3747 transitions, 146411 flow [2022-01-19 14:32:29,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:32:29,904 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:32:29,904 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:32:29,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-19 14:32:30,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-19 14:32:30,105 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:32:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:32:30,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1708312077, now seen corresponding path program 15 times [2022-01-19 14:32:30,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:32:30,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240494382] [2022-01-19 14:32:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:32:30,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:32:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:32:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:32:30,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:32:30,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240494382] [2022-01-19 14:32:30,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240494382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:32:30,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333392565] [2022-01-19 14:32:30,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:32:30,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:32:30,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:32:30,228 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:32:30,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-19 14:32:30,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 14:32:30,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:32:30,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:32:30,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:32:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:32:30,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:32:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:32:31,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333392565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:32:31,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:32:31,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 14:32:31,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538797773] [2022-01-19 14:32:31,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:32:31,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:32:31,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:32:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:32:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:32:31,115 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:32:31,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 701 places, 3747 transitions, 146411 flow. Second operand has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:32:31,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:32:31,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:32:31,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:32:45,866 INFO L129 PetriNetUnfolder]: 3874/12502 cut-off events. [2022-01-19 14:32:45,867 INFO L130 PetriNetUnfolder]: For 524695/524729 co-relation queries the response was YES. [2022-01-19 14:32:46,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151060 conditions, 12502 events. 3874/12502 cut-off events. For 524695/524729 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 145143 event pairs, 72 based on Foata normal form. 35/12474 useless extension candidates. Maximal degree in co-relation 150323. Up to 2165 conditions per place. [2022-01-19 14:32:46,118 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 783 selfloop transitions, 3355 changer transitions 16/4213 dead transitions. [2022-01-19 14:32:46,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 736 places, 4213 transitions, 173478 flow [2022-01-19 14:32:46,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 14:32:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 14:32:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2556 transitions. [2022-01-19 14:32:46,120 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7802197802197802 [2022-01-19 14:32:46,120 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2556 transitions. [2022-01-19 14:32:46,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2556 transitions. [2022-01-19 14:32:46,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:32:46,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2556 transitions. [2022-01-19 14:32:46,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 65.53846153846153) internal successors, (2556), 39 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:32:46,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:32:46,126 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:32:46,127 INFO L186 Difference]: Start difference. First operand has 701 places, 3747 transitions, 146411 flow. Second operand 39 states and 2556 transitions. [2022-01-19 14:32:46,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 736 places, 4213 transitions, 173478 flow [2022-01-19 14:32:56,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 726 places, 4213 transitions, 173263 flow, removed 18 selfloop flow, removed 10 redundant places. [2022-01-19 14:32:56,248 INFO L242 Difference]: Finished difference. Result has 739 places, 4180 transitions, 176716 flow [2022-01-19 14:32:56,251 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=146152, PETRI_DIFFERENCE_MINUEND_PLACES=688, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2922, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=176716, PETRI_PLACES=739, PETRI_TRANSITIONS=4180} [2022-01-19 14:32:56,251 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 665 predicate places. [2022-01-19 14:32:56,251 INFO L470 AbstractCegarLoop]: Abstraction has has 739 places, 4180 transitions, 176716 flow [2022-01-19 14:32:56,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:32:56,252 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:32:56,252 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:32:56,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-19 14:32:56,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-19 14:32:56,455 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:32:56,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:32:56,456 INFO L85 PathProgramCache]: Analyzing trace with hash -895646471, now seen corresponding path program 16 times [2022-01-19 14:32:56,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:32:56,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457332966] [2022-01-19 14:32:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:32:56,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:32:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:32:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:32:56,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:32:56,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457332966] [2022-01-19 14:32:56,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457332966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:32:56,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084404618] [2022-01-19 14:32:56,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:32:56,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:32:56,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:32:56,570 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:32:56,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-19 14:32:56,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:32:56,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:32:56,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:32:56,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:32:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:32:56,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:32:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:32:57,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084404618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:32:57,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:32:57,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 14:32:57,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693858554] [2022-01-19 14:32:57,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:32:57,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:32:57,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:32:57,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:32:57,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:32:57,357 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:32:57,358 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 4180 transitions, 176716 flow. Second operand has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:32:57,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:32:57,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:32:57,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:33:13,146 INFO L129 PetriNetUnfolder]: 3870/12213 cut-off events. [2022-01-19 14:33:13,146 INFO L130 PetriNetUnfolder]: For 583321/583336 co-relation queries the response was YES. [2022-01-19 14:33:13,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160432 conditions, 12213 events. 3870/12213 cut-off events. For 583321/583336 co-relation queries the response was YES. Maximal size of possible extension queue 868. Compared 140105 event pairs, 258 based on Foata normal form. 18/12174 useless extension candidates. Maximal degree in co-relation 159991. Up to 2170 conditions per place. [2022-01-19 14:33:13,420 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1314 selfloop transitions, 2810 changer transitions 9/4192 dead transitions. [2022-01-19 14:33:13,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 4192 transitions, 185096 flow [2022-01-19 14:33:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-19 14:33:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-01-19 14:33:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1909 transitions. [2022-01-19 14:33:13,422 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7836617405582923 [2022-01-19 14:33:13,422 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1909 transitions. [2022-01-19 14:33:13,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1909 transitions. [2022-01-19 14:33:13,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:33:13,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1909 transitions. [2022-01-19 14:33:13,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.82758620689656) internal successors, (1909), 29 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:33:13,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:33:13,427 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:33:13,427 INFO L186 Difference]: Start difference. First operand has 739 places, 4180 transitions, 176716 flow. Second operand 29 states and 1909 transitions. [2022-01-19 14:33:13,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 4192 transitions, 185096 flow [2022-01-19 14:33:24,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 742 places, 4192 transitions, 182826 flow, removed 207 selfloop flow, removed 22 redundant places. [2022-01-19 14:33:24,940 INFO L242 Difference]: Finished difference. Result has 746 places, 4168 transitions, 182809 flow [2022-01-19 14:33:24,943 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=173918, PETRI_DIFFERENCE_MINUEND_PLACES=714, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2801, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=182809, PETRI_PLACES=746, PETRI_TRANSITIONS=4168} [2022-01-19 14:33:24,943 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 672 predicate places. [2022-01-19 14:33:24,943 INFO L470 AbstractCegarLoop]: Abstraction has has 746 places, 4168 transitions, 182809 flow [2022-01-19 14:33:24,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:33:24,944 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:33:24,944 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:33:24,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-19 14:33:25,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:33:25,144 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:33:25,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:33:25,145 INFO L85 PathProgramCache]: Analyzing trace with hash -918570207, now seen corresponding path program 17 times [2022-01-19 14:33:25,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:33:25,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418965681] [2022-01-19 14:33:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:33:25,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:33:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:33:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:33:25,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:33:25,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418965681] [2022-01-19 14:33:25,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418965681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:33:25,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264955429] [2022-01-19 14:33:25,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:33:25,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:33:25,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:33:25,277 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:33:25,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-19 14:33:25,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 14:33:25,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:33:25,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 14:33:25,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:33:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:33:25,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:33:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:33:25,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264955429] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:33:25,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:33:25,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2022-01-19 14:33:25,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241444394] [2022-01-19 14:33:25,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:33:25,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 14:33:25,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:33:25,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 14:33:25,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-19 14:33:25,980 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:33:25,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 4168 transitions, 182809 flow. Second operand has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:33:25,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:33:25,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:33:25,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:33:43,559 INFO L129 PetriNetUnfolder]: 4098/13256 cut-off events. [2022-01-19 14:33:43,559 INFO L130 PetriNetUnfolder]: For 660788/660808 co-relation queries the response was YES. [2022-01-19 14:33:43,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176089 conditions, 13256 events. 4098/13256 cut-off events. For 660788/660808 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 156344 event pairs, 114 based on Foata normal form. 25/13256 useless extension candidates. Maximal degree in co-relation 175801. Up to 2289 conditions per place. [2022-01-19 14:33:43,828 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 902 selfloop transitions, 3573 changer transitions 6/4540 dead transitions. [2022-01-19 14:33:43,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 4540 transitions, 206005 flow [2022-01-19 14:33:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-19 14:33:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-01-19 14:33:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3604 transitions. [2022-01-19 14:33:43,830 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.78008658008658 [2022-01-19 14:33:43,830 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3604 transitions. [2022-01-19 14:33:43,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3604 transitions. [2022-01-19 14:33:43,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:33:43,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3604 transitions. [2022-01-19 14:33:43,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 65.52727272727273) internal successors, (3604), 55 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:33:43,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 84.0) internal successors, (4704), 56 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:33:43,836 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 84.0) internal successors, (4704), 56 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:33:43,836 INFO L186 Difference]: Start difference. First operand has 746 places, 4168 transitions, 182809 flow. Second operand 55 states and 3604 transitions. [2022-01-19 14:33:43,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 4540 transitions, 206005 flow [2022-01-19 14:33:57,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 779 places, 4540 transitions, 204757 flow, removed 19 selfloop flow, removed 14 redundant places. [2022-01-19 14:33:57,153 INFO L242 Difference]: Finished difference. Result has 792 places, 4501 transitions, 206045 flow [2022-01-19 14:33:57,155 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=181644, PETRI_DIFFERENCE_MINUEND_PLACES=725, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=206045, PETRI_PLACES=792, PETRI_TRANSITIONS=4501} [2022-01-19 14:33:57,156 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 718 predicate places. [2022-01-19 14:33:57,156 INFO L470 AbstractCegarLoop]: Abstraction has has 792 places, 4501 transitions, 206045 flow [2022-01-19 14:33:57,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:33:57,156 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:33:57,156 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:33:57,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-19 14:33:57,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:33:57,364 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:33:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:33:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash -195799843, now seen corresponding path program 18 times [2022-01-19 14:33:57,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:33:57,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394421031] [2022-01-19 14:33:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:33:57,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:33:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:33:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:33:57,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:33:57,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394421031] [2022-01-19 14:33:57,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394421031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:33:57,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841755757] [2022-01-19 14:33:57,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:33:57,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:33:57,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:33:57,516 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:33:57,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-19 14:33:57,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 14:33:57,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:33:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:33:57,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:33:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:33:57,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:33:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:33:58,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841755757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:33:58,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:33:58,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-01-19 14:33:58,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357522611] [2022-01-19 14:33:58,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:33:58,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 14:33:58,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:33:58,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 14:33:58,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-19 14:33:58,277 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:33:58,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 4501 transitions, 206045 flow. Second operand has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:33:58,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:33:58,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:33:58,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:34:17,741 INFO L129 PetriNetUnfolder]: 4089/13177 cut-off events. [2022-01-19 14:34:17,742 INFO L130 PetriNetUnfolder]: For 720417/720448 co-relation queries the response was YES. [2022-01-19 14:34:17,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182902 conditions, 13177 events. 4089/13177 cut-off events. For 720417/720448 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 155136 event pairs, 270 based on Foata normal form. 27/13158 useless extension candidates. Maximal degree in co-relation 182317. Up to 2290 conditions per place. [2022-01-19 14:34:18,017 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 693 selfloop transitions, 3760 changer transitions 5/4517 dead transitions. [2022-01-19 14:34:18,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 826 places, 4517 transitions, 215086 flow [2022-01-19 14:34:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-19 14:34:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-01-19 14:34:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2634 transitions. [2022-01-19 14:34:18,020 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7839285714285714 [2022-01-19 14:34:18,020 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2634 transitions. [2022-01-19 14:34:18,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2634 transitions. [2022-01-19 14:34:18,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:34:18,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2634 transitions. [2022-01-19 14:34:18,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.85) internal successors, (2634), 40 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:34:18,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:34:18,026 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:34:18,026 INFO L186 Difference]: Start difference. First operand has 792 places, 4501 transitions, 206045 flow. Second operand 40 states and 2634 transitions. [2022-01-19 14:34:18,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 826 places, 4517 transitions, 215086 flow [2022-01-19 14:34:31,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 805 places, 4517 transitions, 212636 flow, removed 464 selfloop flow, removed 21 redundant places. [2022-01-19 14:34:31,302 INFO L242 Difference]: Finished difference. Result has 807 places, 4493 transitions, 211990 flow [2022-01-19 14:34:31,305 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=203081, PETRI_DIFFERENCE_MINUEND_PLACES=766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3752, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=211990, PETRI_PLACES=807, PETRI_TRANSITIONS=4493} [2022-01-19 14:34:31,305 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 733 predicate places. [2022-01-19 14:34:31,305 INFO L470 AbstractCegarLoop]: Abstraction has has 807 places, 4493 transitions, 211990 flow [2022-01-19 14:34:31,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:34:31,305 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:34:31,305 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:34:31,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-19 14:34:31,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:34:31,506 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:34:31,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:34:31,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1867471673, now seen corresponding path program 19 times [2022-01-19 14:34:31,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:34:31,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674170193] [2022-01-19 14:34:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:34:31,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:34:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:34:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:34:31,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:34:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674170193] [2022-01-19 14:34:31,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674170193] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:34:31,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416555221] [2022-01-19 14:34:31,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:34:31,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:34:31,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:34:31,720 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:34:31,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-19 14:34:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:34:31,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:34:31,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:34:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:34:32,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:35:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:35:05,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416555221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:35:05,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:35:05,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 14:35:05,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764136038] [2022-01-19 14:35:05,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:35:05,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 14:35:05,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:35:05,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 14:35:05,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-19 14:35:05,899 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:35:05,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 807 places, 4493 transitions, 211990 flow. Second operand has 21 states, 21 states have (on average 64.33333333333333) internal successors, (1351), 21 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:35:05,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:35:05,900 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:35:05,900 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:35:26,267 INFO L129 PetriNetUnfolder]: 4422/14111 cut-off events. [2022-01-19 14:35:26,267 INFO L130 PetriNetUnfolder]: For 835285/835302 co-relation queries the response was YES. [2022-01-19 14:35:26,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203886 conditions, 14111 events. 4422/14111 cut-off events. For 835285/835302 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 166899 event pairs, 122 based on Foata normal form. 43/14111 useless extension candidates. Maximal degree in co-relation 203220. Up to 3982 conditions per place. [2022-01-19 14:35:26,704 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 1965 selfloop transitions, 2981 changer transitions 1/5006 dead transitions. [2022-01-19 14:35:26,704 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 836 places, 5006 transitions, 246312 flow [2022-01-19 14:35:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 14:35:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 14:35:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2187 transitions. [2022-01-19 14:35:26,711 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.788961038961039 [2022-01-19 14:35:26,711 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2187 transitions. [2022-01-19 14:35:26,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2187 transitions. [2022-01-19 14:35:26,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:35:26,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2187 transitions. [2022-01-19 14:35:26,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 66.27272727272727) internal successors, (2187), 33 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:35:26,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:35:26,715 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:35:26,715 INFO L186 Difference]: Start difference. First operand has 807 places, 4493 transitions, 211990 flow. Second operand 33 states and 2187 transitions. [2022-01-19 14:35:26,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 836 places, 5006 transitions, 246312 flow [2022-01-19 14:35:41,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 814 places, 5006 transitions, 244124 flow, removed 243 selfloop flow, removed 22 redundant places. [2022-01-19 14:35:41,829 INFO L242 Difference]: Finished difference. Result has 834 places, 4838 transitions, 238973 flow [2022-01-19 14:35:41,832 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=209975, PETRI_DIFFERENCE_MINUEND_PLACES=782, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2682, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=238973, PETRI_PLACES=834, PETRI_TRANSITIONS=4838} [2022-01-19 14:35:41,832 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 760 predicate places. [2022-01-19 14:35:41,833 INFO L470 AbstractCegarLoop]: Abstraction has has 834 places, 4838 transitions, 238973 flow [2022-01-19 14:35:41,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.33333333333333) internal successors, (1351), 21 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:35:41,833 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:35:41,833 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:35:41,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-19 14:35:42,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-19 14:35:42,033 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:35:42,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:35:42,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1763869315, now seen corresponding path program 20 times [2022-01-19 14:35:42,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:35:42,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133102926] [2022-01-19 14:35:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:35:42,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:35:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:35:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:35:42,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:35:42,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133102926] [2022-01-19 14:35:42,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133102926] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:35:42,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539966386] [2022-01-19 14:35:42,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:35:42,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:35:42,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:35:42,144 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:35:42,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-19 14:35:42,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:35:42,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:35:42,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:35:42,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:35:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:35:42,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:36:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:36:46,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539966386] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:36:46,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:36:46,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 14:36:46,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284914759] [2022-01-19 14:36:46,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:36:46,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 14:36:46,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:36:46,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 14:36:46,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-01-19 14:36:46,906 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:36:46,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 834 places, 4838 transitions, 238973 flow. Second operand has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:36:46,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:36:46,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:36:46,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:37:10,381 INFO L129 PetriNetUnfolder]: 4545/14305 cut-off events. [2022-01-19 14:37:10,381 INFO L130 PetriNetUnfolder]: For 956835/956844 co-relation queries the response was YES. [2022-01-19 14:37:10,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217723 conditions, 14305 events. 4545/14305 cut-off events. For 956835/956844 co-relation queries the response was YES. Maximal size of possible extension queue 1036. Compared 168770 event pairs, 405 based on Foata normal form. 15/14161 useless extension candidates. Maximal degree in co-relation 217371. Up to 3524 conditions per place. [2022-01-19 14:37:10,863 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 2409 selfloop transitions, 2605 changer transitions 3/5076 dead transitions. [2022-01-19 14:37:10,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 859 places, 5076 transitions, 261085 flow [2022-01-19 14:37:10,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-19 14:37:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-01-19 14:37:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1724 transitions. [2022-01-19 14:37:10,865 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7893772893772893 [2022-01-19 14:37:10,865 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1724 transitions. [2022-01-19 14:37:10,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1724 transitions. [2022-01-19 14:37:10,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:37:10,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1724 transitions. [2022-01-19 14:37:10,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 66.3076923076923) internal successors, (1724), 26 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:37:10,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 84.0) internal successors, (2268), 27 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:37:10,868 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 84.0) internal successors, (2268), 27 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:37:10,868 INFO L186 Difference]: Start difference. First operand has 834 places, 4838 transitions, 238973 flow. Second operand 26 states and 1724 transitions. [2022-01-19 14:37:10,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 859 places, 5076 transitions, 261085 flow [2022-01-19 14:37:29,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 849 places, 5076 transitions, 258908 flow, removed 687 selfloop flow, removed 10 redundant places. [2022-01-19 14:37:29,266 INFO L242 Difference]: Finished difference. Result has 862 places, 5016 transitions, 256405 flow [2022-01-19 14:37:29,270 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=236917, PETRI_DIFFERENCE_MINUEND_PLACES=824, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=256405, PETRI_PLACES=862, PETRI_TRANSITIONS=5016} [2022-01-19 14:37:29,271 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 788 predicate places. [2022-01-19 14:37:29,271 INFO L470 AbstractCegarLoop]: Abstraction has has 862 places, 5016 transitions, 256405 flow [2022-01-19 14:37:29,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:37:29,271 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:37:29,271 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:37:29,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-19 14:37:29,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-19 14:37:29,487 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:37:29,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:37:29,488 INFO L85 PathProgramCache]: Analyzing trace with hash 874884631, now seen corresponding path program 21 times [2022-01-19 14:37:29,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:37:29,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816542244] [2022-01-19 14:37:29,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:37:29,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:37:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:37:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:37:29,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:37:29,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816542244] [2022-01-19 14:37:29,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816542244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:37:29,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399571458] [2022-01-19 14:37:29,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:37:29,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:37:29,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:37:29,640 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:37:29,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-19 14:37:29,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 14:37:29,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:37:29,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:37:29,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:37:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:37:29,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:38:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:38:33,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399571458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:38:33,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:38:33,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 14:38:33,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136644510] [2022-01-19 14:38:33,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:38:33,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:38:33,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:38:33,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:38:33,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:38:33,241 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:38:33,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 862 places, 5016 transitions, 256405 flow. Second operand has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:38:33,242 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:38:33,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:38:33,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:38:58,717 INFO L129 PetriNetUnfolder]: 4599/14509 cut-off events. [2022-01-19 14:38:58,717 INFO L130 PetriNetUnfolder]: For 1045706/1045710 co-relation queries the response was YES. [2022-01-19 14:38:58,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226415 conditions, 14509 events. 4599/14509 cut-off events. For 1045706/1045710 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 171502 event pairs, 246 based on Foata normal form. 12/14483 useless extension candidates. Maximal degree in co-relation 226186. Up to 2859 conditions per place. [2022-01-19 14:38:59,074 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1136 selfloop transitions, 4018 changer transitions 3/5216 dead transitions. [2022-01-19 14:38:59,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 910 places, 5216 transitions, 275776 flow [2022-01-19 14:38:59,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-19 14:38:59,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-01-19 14:38:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3275 transitions. [2022-01-19 14:38:59,078 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7797619047619048 [2022-01-19 14:38:59,078 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3275 transitions. [2022-01-19 14:38:59,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3275 transitions. [2022-01-19 14:38:59,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:38:59,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3275 transitions. [2022-01-19 14:38:59,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 65.5) internal successors, (3275), 50 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:38:59,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 84.0) internal successors, (4284), 51 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:38:59,085 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 84.0) internal successors, (4284), 51 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:38:59,085 INFO L186 Difference]: Start difference. First operand has 862 places, 5016 transitions, 256405 flow. Second operand 50 states and 3275 transitions. [2022-01-19 14:38:59,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 910 places, 5216 transitions, 275776 flow [2022-01-19 14:39:18,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 902 places, 5216 transitions, 275344 flow, removed 92 selfloop flow, removed 8 redundant places. [2022-01-19 14:39:18,463 INFO L242 Difference]: Finished difference. Result has 916 places, 5161 transitions, 277780 flow [2022-01-19 14:39:18,467 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=255854, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=277780, PETRI_PLACES=916, PETRI_TRANSITIONS=5161} [2022-01-19 14:39:18,467 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 842 predicate places. [2022-01-19 14:39:18,468 INFO L470 AbstractCegarLoop]: Abstraction has has 916 places, 5161 transitions, 277780 flow [2022-01-19 14:39:18,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:39:18,468 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:39:18,468 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:39:18,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-19 14:39:18,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:39:18,690 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:39:18,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:39:18,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1198734987, now seen corresponding path program 22 times [2022-01-19 14:39:18,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:39:18,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897510106] [2022-01-19 14:39:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:39:18,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:39:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:39:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:39:18,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:39:18,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897510106] [2022-01-19 14:39:18,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897510106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:39:18,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756759316] [2022-01-19 14:39:18,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:39:18,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:39:18,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:39:18,802 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:39:18,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-19 14:39:18,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:39:18,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:39:18,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:39:18,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:39:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:39:19,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:40:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:40:29,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756759316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:40:29,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:40:29,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 14:40:29,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790406331] [2022-01-19 14:40:29,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:40:29,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:40:29,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:40:29,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:40:29,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:40:29,300 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:40:29,301 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 916 places, 5161 transitions, 277780 flow. Second operand has 19 states, 19 states have (on average 63.8421052631579) internal successors, (1213), 19 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:40:29,301 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:40:29,301 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:40:29,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:40:55,387 INFO L129 PetriNetUnfolder]: 4634/14599 cut-off events. [2022-01-19 14:40:55,387 INFO L130 PetriNetUnfolder]: For 1167957/1167971 co-relation queries the response was YES. [2022-01-19 14:40:55,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238880 conditions, 14599 events. 4634/14599 cut-off events. For 1167957/1167971 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 172769 event pairs, 262 based on Foata normal form. 9/14557 useless extension candidates. Maximal degree in co-relation 238638. Up to 3496 conditions per place. [2022-01-19 14:40:55,807 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1868 selfloop transitions, 3315 changer transitions 3/5245 dead transitions. [2022-01-19 14:40:55,807 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 950 places, 5245 transitions, 291662 flow [2022-01-19 14:40:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-19 14:40:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-01-19 14:40:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2425 transitions. [2022-01-19 14:40:55,810 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7802445302445302 [2022-01-19 14:40:55,810 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2425 transitions. [2022-01-19 14:40:55,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2425 transitions. [2022-01-19 14:40:55,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:40:55,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2425 transitions. [2022-01-19 14:40:55,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 65.54054054054055) internal successors, (2425), 37 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:40:55,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:40:55,815 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:40:55,815 INFO L186 Difference]: Start difference. First operand has 916 places, 5161 transitions, 277780 flow. Second operand 37 states and 2425 transitions. [2022-01-19 14:40:55,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 950 places, 5245 transitions, 291662 flow [2022-01-19 14:41:16,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 936 places, 5245 transitions, 291094 flow, removed 147 selfloop flow, removed 14 redundant places. [2022-01-19 14:41:16,985 INFO L242 Difference]: Finished difference. Result has 948 places, 5214 transitions, 291480 flow [2022-01-19 14:41:16,989 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=277248, PETRI_DIFFERENCE_MINUEND_PLACES=900, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1857, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=291480, PETRI_PLACES=948, PETRI_TRANSITIONS=5214} [2022-01-19 14:41:16,989 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 874 predicate places. [2022-01-19 14:41:16,989 INFO L470 AbstractCegarLoop]: Abstraction has has 948 places, 5214 transitions, 291480 flow [2022-01-19 14:41:16,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.8421052631579) internal successors, (1213), 19 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:41:16,990 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:41:16,990 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:41:17,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-19 14:41:17,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:41:17,190 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:41:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:41:17,191 INFO L85 PathProgramCache]: Analyzing trace with hash -478409363, now seen corresponding path program 23 times [2022-01-19 14:41:17,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:41:17,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354197659] [2022-01-19 14:41:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:41:17,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:41:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:41:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:41:17,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:41:17,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354197659] [2022-01-19 14:41:17,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354197659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:41:17,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089023722] [2022-01-19 14:41:17,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:41:17,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:41:17,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:41:17,318 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:41:17,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-19 14:41:17,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:41:17,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:41:17,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:41:17,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:41:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:41:17,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:41:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:41:38,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089023722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:41:38,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:41:38,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 14:41:38,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863715418] [2022-01-19 14:41:38,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:41:38,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:41:38,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:41:38,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:41:38,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:41:38,732 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 14:41:38,733 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 948 places, 5214 transitions, 291480 flow. Second operand has 19 states, 19 states have (on average 63.8421052631579) internal successors, (1213), 19 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:41:38,733 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:41:38,733 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 14:41:38,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:42:05,697 INFO L129 PetriNetUnfolder]: 4632/14596 cut-off events. [2022-01-19 14:42:05,697 INFO L130 PetriNetUnfolder]: For 1288676/1288689 co-relation queries the response was YES. [2022-01-19 14:42:05,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246990 conditions, 14596 events. 4632/14596 cut-off events. For 1288676/1288689 co-relation queries the response was YES. Maximal size of possible extension queue 1045. Compared 172711 event pairs, 267 based on Foata normal form. 4/14555 useless extension candidates. Maximal degree in co-relation 246737. Up to 3821 conditions per place. [2022-01-19 14:42:06,110 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 2220 selfloop transitions, 2947 changer transitions 4/5230 dead transitions. [2022-01-19 14:42:06,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 5230 transitions, 302136 flow [2022-01-19 14:42:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 14:42:06,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 14:42:06,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1189 transitions. [2022-01-19 14:42:06,111 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7863756613756614 [2022-01-19 14:42:06,112 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1189 transitions. [2022-01-19 14:42:06,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1189 transitions. [2022-01-19 14:42:06,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:42:06,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1189 transitions. [2022-01-19 14:42:06,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.05555555555556) internal successors, (1189), 18 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:42:06,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:42:06,114 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:42:06,114 INFO L186 Difference]: Start difference. First operand has 948 places, 5214 transitions, 291480 flow. Second operand 18 states and 1189 transitions. [2022-01-19 14:42:06,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 5230 transitions, 302136 flow [2022-01-19 14:42:30,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 942 places, 5230 transitions, 300577 flow, removed 117 selfloop flow, removed 20 redundant places. [2022-01-19 14:42:30,728 INFO L242 Difference]: Finished difference. Result has 944 places, 5208 transitions, 299122 flow [2022-01-19 14:42:30,732 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=289720, PETRI_DIFFERENCE_MINUEND_PLACES=925, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2945, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=299122, PETRI_PLACES=944, PETRI_TRANSITIONS=5208} [2022-01-19 14:42:30,732 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 870 predicate places. [2022-01-19 14:42:30,732 INFO L470 AbstractCegarLoop]: Abstraction has has 944 places, 5208 transitions, 299122 flow [2022-01-19 14:42:30,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.8421052631579) internal successors, (1213), 19 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:42:30,732 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:42:30,733 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:42:30,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-19 14:42:30,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-19 14:42:30,935 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:42:30,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:42:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1627337661, now seen corresponding path program 24 times [2022-01-19 14:42:30,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:42:30,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003694241] [2022-01-19 14:42:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:42:30,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:42:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:42:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:42:31,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:42:31,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003694241] [2022-01-19 14:42:31,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003694241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:42:31,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259950472] [2022-01-19 14:42:31,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:42:31,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:42:31,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:42:31,269 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:42:31,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-19 14:42:31,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 14:42:31,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:42:31,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-19 14:42:31,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:42:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:42:31,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:42:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:42:32,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259950472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:42:32,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:42:32,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 24 [2022-01-19 14:42:32,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890781404] [2022-01-19 14:42:32,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:42:32,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 14:42:32,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:42:32,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 14:42:32,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-01-19 14:42:32,409 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2022-01-19 14:42:32,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 944 places, 5208 transitions, 299122 flow. Second operand has 24 states, 24 states have (on average 52.25) internal successors, (1254), 24 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:42:32,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:42:32,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2022-01-19 14:42:32,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-01-19 14:43:01,063 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 14:43:01,063 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 [2022-01-19 14:43:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-19 14:43:01,269 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 14:43:01,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-19 14:43:01,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-19 14:43:01,470 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (24states, 49/84 universal loopers) in iteration 27,while PetriNetUnfolder was constructing finite prefix that currently has 248620 conditions, 10678 events (4096/10677 cut-off events. For 1503969/1503969 co-relation queries the response was YES. Maximal size of possible extension queue 1540. Compared 125210 event pairs, 58 based on Foata normal form. 0/12075 useless extension candidates. Maximal degree in co-relation 248366. Up to 2672 conditions per place.). [2022-01-19 14:43:01,472 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 14:43:01,472 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 14:43:01,476 INFO L732 BasicCegarLoop]: Path program histogram: [24, 2, 1] [2022-01-19 14:43:01,477 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 14:43:01,477 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 14:43:01,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 02:43:01 BasicIcfg [2022-01-19 14:43:01,479 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 14:43:01,479 INFO L158 Benchmark]: Toolchain (without parser) took 830012.82ms. Allocated memory was 360.7MB in the beginning and 7.3GB in the end (delta: 6.9GB). Free memory was 307.3MB in the beginning and 5.2GB in the end (delta: -4.9GB). Peak memory consumption was 2.5GB. Max. memory is 16.0GB. [2022-01-19 14:43:01,479 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 360.7MB. Free memory is still 324.0MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 14:43:01,480 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.03ms. Allocated memory was 360.7MB in the beginning and 434.1MB in the end (delta: 73.4MB). Free memory was 307.1MB in the beginning and 408.2MB in the end (delta: -101.1MB). Peak memory consumption was 10.6MB. Max. memory is 16.0GB. [2022-01-19 14:43:01,480 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.08ms. Allocated memory is still 434.1MB. Free memory was 407.4MB in the beginning and 406.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 14:43:01,480 INFO L158 Benchmark]: Boogie Preprocessor took 17.04ms. Allocated memory is still 434.1MB. Free memory was 406.3MB in the beginning and 405.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 14:43:01,480 INFO L158 Benchmark]: RCFGBuilder took 312.91ms. Allocated memory is still 434.1MB. Free memory was 405.3MB in the beginning and 389.5MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2022-01-19 14:43:01,480 INFO L158 Benchmark]: TraceAbstraction took 829449.17ms. Allocated memory was 434.1MB in the beginning and 7.3GB in the end (delta: 6.8GB). Free memory was 389.5MB in the beginning and 5.2GB in the end (delta: -4.8GB). Peak memory consumption was 2.6GB. Max. memory is 16.0GB. [2022-01-19 14:43:01,481 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 360.7MB. Free memory is still 324.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 203.03ms. Allocated memory was 360.7MB in the beginning and 434.1MB in the end (delta: 73.4MB). Free memory was 307.1MB in the beginning and 408.2MB in the end (delta: -101.1MB). Peak memory consumption was 10.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 22.08ms. Allocated memory is still 434.1MB. Free memory was 407.4MB in the beginning and 406.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 17.04ms. Allocated memory is still 434.1MB. Free memory was 406.3MB in the beginning and 405.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 312.91ms. Allocated memory is still 434.1MB. Free memory was 405.3MB in the beginning and 389.5MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 829449.17ms. Allocated memory was 434.1MB in the beginning and 7.3GB in the end (delta: 6.8GB). Free memory was 389.5MB in the beginning and 5.2GB in the end (delta: -4.8GB). Peak memory consumption was 2.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (24states, 49/84 universal loopers) in iteration 27,while PetriNetUnfolder was constructing finite prefix that currently has 248620 conditions, 10678 events (4096/10677 cut-off events. For 1503969/1503969 co-relation queries the response was YES. Maximal size of possible extension queue 1540. Compared 125210 event pairs, 58 based on Foata normal form. 0/12075 useless extension candidates. Maximal degree in co-relation 248366. Up to 2672 conditions per place.). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (24states, 49/84 universal loopers) in iteration 27,while PetriNetUnfolder was constructing finite prefix that currently has 248620 conditions, 10678 events (4096/10677 cut-off events. For 1503969/1503969 co-relation queries the response was YES. Maximal size of possible extension queue 1540. Compared 125210 event pairs, 58 based on Foata normal form. 0/12075 useless extension candidates. Maximal degree in co-relation 248366. Up to 2672 conditions per place.). - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (24states, 49/84 universal loopers) in iteration 27,while PetriNetUnfolder was constructing finite prefix that currently has 248620 conditions, 10678 events (4096/10677 cut-off events. For 1503969/1503969 co-relation queries the response was YES. Maximal size of possible extension queue 1540. Compared 125210 event pairs, 58 based on Foata normal form. 0/12075 useless extension candidates. Maximal degree in co-relation 248366. Up to 2672 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 96 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 829.3s, OverallIterations: 27, TraceHistogramMax: 2, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.0s, AutomataDifference: 474.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2989 SdHoareTripleChecker+Valid, 10.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2989 mSDsluCounter, 2393 SdHoareTripleChecker+Invalid, 9.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3271 mSDsCounter, 1358 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11498 IncrementalHoareTripleChecker+Invalid, 12856 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1358 mSolverCounterUnsat, 494 mSDtfsCounter, 11498 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4455 GetRequests, 3293 SyntacticMatches, 34 SemanticMatches, 1128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18532 ImplicationChecksByTransitivity, 30.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=299122occurred in iteration=26, InterpolantAutomatonStates: 972, 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: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 347.3s InterpolantComputationTime, 3696 NumberOfCodeBlocks, 3531 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 5345 ConstructedInterpolants, 0 QuantifiedInterpolants, 27080 SizeOfPredicates, 267 NumberOfNonLiveVariables, 3568 ConjunctsInSsa, 299 ConjunctsInUnsatCore, 76 InterpolantComputations, 3 PerfectInterpolantSequences, 334/570 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