/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-nonblocking-cntr-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 14:45:09,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 14:45:09,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 14:45:09,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 14:45:09,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 14:45:09,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 14:45:09,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 14:45:09,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 14:45:09,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 14:45:09,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 14:45:09,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 14:45:09,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 14:45:09,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 14:45:09,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 14:45:09,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 14:45:09,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 14:45:09,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 14:45:09,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 14:45:09,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 14:45:09,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 14:45:09,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 14:45:09,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 14:45:09,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 14:45:09,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 14:45:09,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 14:45:09,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 14:45:09,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 14:45:09,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 14:45:09,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 14:45:09,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 14:45:09,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 14:45:09,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 14:45:09,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 14:45:09,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 14:45:09,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 14:45:09,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 14:45:09,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 14:45:09,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 14:45:09,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 14:45:09,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 14:45:09,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 14:45:09,640 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 14:45:09,656 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 14:45:09,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 14:45:09,657 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 14:45:09,657 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 14:45:09,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 14:45:09,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 14:45:09,658 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 14:45:09,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 14:45:09,658 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 14:45:09,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 14:45:09,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 14:45:09,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 14:45:09,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 14:45:09,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 14:45:09,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 14:45:09,661 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 14:45:09,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 14:45:09,661 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 14:45:09,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 14:45:09,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 14:45:09,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 14:45:09,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 14:45:09,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 14:45:09,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:45:09,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 14:45:09,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 14:45:09,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 14:45:09,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 14:45:09,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 14:45:09,663 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 14:45:09,663 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 14:45:09,664 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=AFTER [2022-01-19 14:45:09,664 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 14:45:09,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 14:45:09,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 14:45:09,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 14:45:09,833 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 14:45:09,835 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 14:45:09,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-01-19 14:45:09,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74a1adbda/af5c2dd4cb8442f3b2429b832a1b0866/FLAG818447a57 [2022-01-19 14:45:10,256 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 14:45:10,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-01-19 14:45:10,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74a1adbda/af5c2dd4cb8442f3b2429b832a1b0866/FLAG818447a57 [2022-01-19 14:45:10,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74a1adbda/af5c2dd4cb8442f3b2429b832a1b0866 [2022-01-19 14:45:10,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 14:45:10,277 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 14:45:10,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 14:45:10,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 14:45:10,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 14:45:10,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:45:10" (1/1) ... [2022-01-19 14:45:10,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18d3bbb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:10, skipping insertion in model container [2022-01-19 14:45:10,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:45:10" (1/1) ... [2022-01-19 14:45:10,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 14:45:10,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 14:45:10,422 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-01-19 14:45:10,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:45:10,428 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 14:45:10,444 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-01-19 14:45:10,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:45:10,455 INFO L208 MainTranslator]: Completed translation [2022-01-19 14:45:10,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:10 WrapperNode [2022-01-19 14:45:10,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 14:45:10,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 14:45:10,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 14:45:10,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 14:45:10,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:10" (1/1) ... [2022-01-19 14:45:10,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:10" (1/1) ... [2022-01-19 14:45:10,483 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2022-01-19 14:45:10,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 14:45:10,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 14:45:10,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 14:45:10,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 14:45:10,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:10" (1/1) ... [2022-01-19 14:45:10,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:10" (1/1) ... [2022-01-19 14:45:10,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:10" (1/1) ... [2022-01-19 14:45:10,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:10" (1/1) ... [2022-01-19 14:45:10,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:10" (1/1) ... [2022-01-19 14:45:10,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:10" (1/1) ... [2022-01-19 14:45:10,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:10" (1/1) ... [2022-01-19 14:45:10,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 14:45:10,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 14:45:10,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 14:45:10,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 14:45:10,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:10" (1/1) ... [2022-01-19 14:45:10,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:45:10,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:10,540 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 14:45:10,572 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 14:45:10,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 14:45:10,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 14:45:10,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 14:45:10,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 14:45:10,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 14:45:10,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 14:45:10,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 14:45:10,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 14:45:10,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 14:45:10,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 14:45:10,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 14:45:10,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 14:45:10,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 14:45:10,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 14:45:10,590 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 14:45:10,662 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 14:45:10,663 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 14:45:10,800 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 14:45:10,821 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 14:45:10,822 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 14:45:10,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:45:10 BoogieIcfgContainer [2022-01-19 14:45:10,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 14:45:10,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 14:45:10,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 14:45:10,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 14:45:10,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:45:10" (1/3) ... [2022-01-19 14:45:10,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a3660b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:45:10, skipping insertion in model container [2022-01-19 14:45:10,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:10" (2/3) ... [2022-01-19 14:45:10,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a3660b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:45:10, skipping insertion in model container [2022-01-19 14:45:10,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:45:10" (3/3) ... [2022-01-19 14:45:10,829 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-01-19 14:45:10,832 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 14:45:10,832 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 14:45:10,832 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 14:45:10,853 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,853 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,853 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,853 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,854 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,854 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,855 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,855 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,856 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,856 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,856 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,857 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,857 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,857 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,857 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,857 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,858 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,858 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,858 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,858 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,858 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,858 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,858 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,858 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,858 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,859 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,859 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,859 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,859 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,859 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,859 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,859 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,862 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,862 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,862 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,862 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,862 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,863 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:10,866 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 14:45:10,895 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 14:45:10,899 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 14:45:10,900 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 14:45:10,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2022-01-19 14:45:10,936 INFO L129 PetriNetUnfolder]: 6/84 cut-off events. [2022-01-19 14:45:10,936 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 14:45:10,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-01-19 14:45:10,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2022-01-19 14:45:10,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2022-01-19 14:45:10,963 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-01-19 14:45:10,963 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 14:45:10,963 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:10,964 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 14:45:10,964 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:10,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:10,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1565492451, now seen corresponding path program 1 times [2022-01-19 14:45:10,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:10,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259093011] [2022-01-19 14:45:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:10,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:11,156 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 14:45:11,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:11,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259093011] [2022-01-19 14:45:11,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259093011] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:45:11,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:45:11,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 14:45:11,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136431910] [2022-01-19 14:45:11,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:45:11,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 14:45:11,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:11,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 14:45:11,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 14:45:11,195 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 86 [2022-01-19 14:45:11,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 162 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 14:45:11,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:11,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 86 [2022-01-19 14:45:11,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:11,253 INFO L129 PetriNetUnfolder]: 10/97 cut-off events. [2022-01-19 14:45:11,253 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-01-19 14:45:11,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 97 events. 10/97 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 1 based on Foata normal form. 11/98 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-01-19 14:45:11,255 INFO L132 encePairwiseOnDemand]: 82/86 looper letters, 6 selfloop transitions, 0 changer transitions 2/71 dead transitions. [2022-01-19 14:45:11,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 166 flow [2022-01-19 14:45:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 14:45:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 14:45:11,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2022-01-19 14:45:11,268 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2022-01-19 14:45:11,268 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2022-01-19 14:45:11,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2022-01-19 14:45:11,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:11,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2022-01-19 14:45:11,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 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 14:45:11,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 14:45:11,282 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 14:45:11,284 INFO L186 Difference]: Start difference. First operand has 76 places, 75 transitions, 162 flow. Second operand 2 states and 160 transitions. [2022-01-19 14:45:11,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 166 flow [2022-01-19 14:45:11,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 14:45:11,294 INFO L242 Difference]: Finished difference. Result has 73 places, 69 transitions, 142 flow [2022-01-19 14:45:11,295 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2022-01-19 14:45:11,297 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2022-01-19 14:45:11,298 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 142 flow [2022-01-19 14:45:11,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 14:45:11,298 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:11,298 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 14:45:11,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 14:45:11,299 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:11,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:11,299 INFO L85 PathProgramCache]: Analyzing trace with hash -305653797, now seen corresponding path program 1 times [2022-01-19 14:45:11,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:11,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128345491] [2022-01-19 14:45:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:11,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:11,518 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 14:45:11,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:11,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128345491] [2022-01-19 14:45:11,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128345491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:45:11,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:45:11,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 14:45:11,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668211625] [2022-01-19 14:45:11,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:45:11,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 14:45:11,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:11,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 14:45:11,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-19 14:45:11,523 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 86 [2022-01-19 14:45:11,524 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 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 14:45:11,524 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:11,524 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 86 [2022-01-19 14:45:11,524 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:11,617 INFO L129 PetriNetUnfolder]: 41/148 cut-off events. [2022-01-19 14:45:11,617 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-01-19 14:45:11,619 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 148 events. 41/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 367 event pairs, 13 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 240. Up to 58 conditions per place. [2022-01-19 14:45:11,620 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 24 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2022-01-19 14:45:11,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 213 flow [2022-01-19 14:45:11,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:45:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:45:11,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2022-01-19 14:45:11,626 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2022-01-19 14:45:11,626 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2022-01-19 14:45:11,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2022-01-19 14:45:11,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:11,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2022-01-19 14:45:11,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 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 14:45:11,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 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 14:45:11,633 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 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 14:45:11,633 INFO L186 Difference]: Start difference. First operand has 73 places, 69 transitions, 142 flow. Second operand 6 states and 366 transitions. [2022-01-19 14:45:11,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 213 flow [2022-01-19 14:45:11,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 14:45:11,635 INFO L242 Difference]: Finished difference. Result has 77 places, 70 transitions, 160 flow [2022-01-19 14:45:11,635 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, 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=160, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2022-01-19 14:45:11,636 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2022-01-19 14:45:11,636 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 160 flow [2022-01-19 14:45:11,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 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 14:45:11,637 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:11,637 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] [2022-01-19 14:45:11,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 14:45:11,637 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:11,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:11,638 INFO L85 PathProgramCache]: Analyzing trace with hash -443057429, now seen corresponding path program 1 times [2022-01-19 14:45:11,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:11,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885698308] [2022-01-19 14:45:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:11,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:11,747 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 14:45:11,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:11,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885698308] [2022-01-19 14:45:11,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885698308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:11,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518505213] [2022-01-19 14:45:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:11,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:11,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:11,751 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 14:45:11,752 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 14:45:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:11,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 14:45:11,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:12,017 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 14:45:12,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:12,244 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 14:45:12,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518505213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:12,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:12,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-19 14:45:12,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168096066] [2022-01-19 14:45:12,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:12,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 14:45:12,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:12,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 14:45:12,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-19 14:45:12,249 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 86 [2022-01-19 14:45:12,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 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 14:45:12,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:12,249 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 86 [2022-01-19 14:45:12,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:12,325 INFO L129 PetriNetUnfolder]: 27/138 cut-off events. [2022-01-19 14:45:12,326 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-01-19 14:45:12,326 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 138 events. 27/138 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 357 event pairs, 5 based on Foata normal form. 4/136 useless extension candidates. Maximal degree in co-relation 221. Up to 25 conditions per place. [2022-01-19 14:45:12,327 INFO L132 encePairwiseOnDemand]: 81/86 looper letters, 19 selfloop transitions, 7 changer transitions 2/83 dead transitions. [2022-01-19 14:45:12,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 83 transitions, 254 flow [2022-01-19 14:45:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 14:45:12,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 14:45:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 363 transitions. [2022-01-19 14:45:12,329 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8441860465116279 [2022-01-19 14:45:12,331 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 363 transitions. [2022-01-19 14:45:12,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 363 transitions. [2022-01-19 14:45:12,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:12,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 363 transitions. [2022-01-19 14:45:12,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.6) internal successors, (363), 5 states have internal predecessors, (363), 0 states have call successors, (0), 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 14:45:12,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 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 14:45:12,335 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 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 14:45:12,335 INFO L186 Difference]: Start difference. First operand has 77 places, 70 transitions, 160 flow. Second operand 5 states and 363 transitions. [2022-01-19 14:45:12,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 83 transitions, 254 flow [2022-01-19 14:45:12,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 83 transitions, 244 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 14:45:12,338 INFO L242 Difference]: Finished difference. Result has 81 places, 76 transitions, 212 flow [2022-01-19 14:45:12,338 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2022-01-19 14:45:12,340 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 5 predicate places. [2022-01-19 14:45:12,340 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 212 flow [2022-01-19 14:45:12,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 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 14:45:12,340 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:12,340 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, 1, 1] [2022-01-19 14:45:12,359 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 14:45:12,555 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 14:45:12,555 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:12,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1484029817, now seen corresponding path program 1 times [2022-01-19 14:45:12,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:12,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495857581] [2022-01-19 14:45:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:12,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:12,781 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 14:45:12,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:12,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495857581] [2022-01-19 14:45:12,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495857581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:12,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268667208] [2022-01-19 14:45:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:12,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:12,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:12,786 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 14:45:12,823 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 14:45:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:12,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:45:12,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:13,265 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 14:45:13,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:13,797 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 14:45:13,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268667208] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:13,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:13,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 14:45:13,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399617807] [2022-01-19 14:45:13,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:13,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 14:45:13,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:13,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 14:45:13,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 14:45:13,802 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:45:13,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 212 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 14:45:13,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:13,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:45:13,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:15,403 INFO L129 PetriNetUnfolder]: 260/787 cut-off events. [2022-01-19 14:45:15,403 INFO L130 PetriNetUnfolder]: For 564/572 co-relation queries the response was YES. [2022-01-19 14:45:15,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2084 conditions, 787 events. 260/787 cut-off events. For 564/572 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4626 event pairs, 6 based on Foata normal form. 7/754 useless extension candidates. Maximal degree in co-relation 2076. Up to 143 conditions per place. [2022-01-19 14:45:15,409 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 112 selfloop transitions, 121 changer transitions 53/327 dead transitions. [2022-01-19 14:45:15,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 327 transitions, 1946 flow [2022-01-19 14:45:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 14:45:15,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 14:45:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3152 transitions. [2022-01-19 14:45:15,421 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6430028559771522 [2022-01-19 14:45:15,421 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3152 transitions. [2022-01-19 14:45:15,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3152 transitions. [2022-01-19 14:45:15,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:15,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3152 transitions. [2022-01-19 14:45:15,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 55.29824561403509) internal successors, (3152), 57 states have internal predecessors, (3152), 0 states have call successors, (0), 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 14:45:15,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 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 14:45:15,436 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 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 14:45:15,437 INFO L186 Difference]: Start difference. First operand has 81 places, 76 transitions, 212 flow. Second operand 57 states and 3152 transitions. [2022-01-19 14:45:15,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 327 transitions, 1946 flow [2022-01-19 14:45:15,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 327 transitions, 1946 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 14:45:15,449 INFO L242 Difference]: Finished difference. Result has 168 places, 203 transitions, 1379 flow [2022-01-19 14:45:15,449 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1379, PETRI_PLACES=168, PETRI_TRANSITIONS=203} [2022-01-19 14:45:15,450 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 92 predicate places. [2022-01-19 14:45:15,450 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 203 transitions, 1379 flow [2022-01-19 14:45:15,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 14:45:15,451 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:15,451 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, 1, 1] [2022-01-19 14:45:15,471 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 14:45:15,667 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 14:45:15,668 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1760521617, now seen corresponding path program 2 times [2022-01-19 14:45:15,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:15,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422041013] [2022-01-19 14:45:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:15,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:15,880 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 14:45:15,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:15,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422041013] [2022-01-19 14:45:15,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422041013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:15,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051670658] [2022-01-19 14:45:15,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:45:15,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:15,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:15,881 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 14:45:15,882 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 14:45:15,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:45:15,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:15,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:45:15,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:16,321 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 14:45:16,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:16,808 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 14:45:16,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051670658] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:16,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:16,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 14:45:16,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253583516] [2022-01-19 14:45:16,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:16,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 14:45:16,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:16,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 14:45:16,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 14:45:16,811 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:45:16,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 203 transitions, 1379 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 14:45:16,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:16,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:45:16,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:19,248 INFO L129 PetriNetUnfolder]: 347/1098 cut-off events. [2022-01-19 14:45:19,249 INFO L130 PetriNetUnfolder]: For 3000/3000 co-relation queries the response was YES. [2022-01-19 14:45:19,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4264 conditions, 1098 events. 347/1098 cut-off events. For 3000/3000 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7229 event pairs, 15 based on Foata normal form. 2/1092 useless extension candidates. Maximal degree in co-relation 4224. Up to 224 conditions per place. [2022-01-19 14:45:19,260 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 136 selfloop transitions, 230 changer transitions 34/441 dead transitions. [2022-01-19 14:45:19,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 441 transitions, 4005 flow [2022-01-19 14:45:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-19 14:45:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-01-19 14:45:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4115 transitions. [2022-01-19 14:45:19,267 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.637984496124031 [2022-01-19 14:45:19,267 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4115 transitions. [2022-01-19 14:45:19,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4115 transitions. [2022-01-19 14:45:19,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:19,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4115 transitions. [2022-01-19 14:45:19,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 54.86666666666667) internal successors, (4115), 75 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:45:19,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 86.0) internal successors, (6536), 76 states have internal predecessors, (6536), 0 states have call successors, (0), 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 14:45:19,285 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 86.0) internal successors, (6536), 76 states have internal predecessors, (6536), 0 states have call successors, (0), 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 14:45:19,285 INFO L186 Difference]: Start difference. First operand has 168 places, 203 transitions, 1379 flow. Second operand 75 states and 4115 transitions. [2022-01-19 14:45:19,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 441 transitions, 4005 flow [2022-01-19 14:45:19,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 441 transitions, 3689 flow, removed 158 selfloop flow, removed 14 redundant places. [2022-01-19 14:45:19,310 INFO L242 Difference]: Finished difference. Result has 230 places, 332 transitions, 3004 flow [2022-01-19 14:45:19,310 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=3004, PETRI_PLACES=230, PETRI_TRANSITIONS=332} [2022-01-19 14:45:19,312 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 154 predicate places. [2022-01-19 14:45:19,312 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 332 transitions, 3004 flow [2022-01-19 14:45:19,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 14:45:19,312 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:19,312 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, 1, 1] [2022-01-19 14:45:19,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-19 14:45:19,527 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 14:45:19,529 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:19,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1200502709, now seen corresponding path program 3 times [2022-01-19 14:45:19,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:19,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845075106] [2022-01-19 14:45:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:19,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:19,734 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 14:45:19,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:19,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845075106] [2022-01-19 14:45:19,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845075106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:19,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588160069] [2022-01-19 14:45:19,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:45:19,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:19,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:19,735 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 14:45:19,736 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 14:45:19,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 14:45:19,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:19,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:45:19,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:20,147 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 14:45:20,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:20,625 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 14:45:20,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588160069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:20,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:20,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:45:20,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286681545] [2022-01-19 14:45:20,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:20,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:45:20,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:20,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:45:20,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:45:20,628 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:45:20,629 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 332 transitions, 3004 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:45:20,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:20,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:45:20,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:22,671 INFO L129 PetriNetUnfolder]: 544/1748 cut-off events. [2022-01-19 14:45:22,671 INFO L130 PetriNetUnfolder]: For 7138/7157 co-relation queries the response was YES. [2022-01-19 14:45:22,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7937 conditions, 1748 events. 544/1748 cut-off events. For 7138/7157 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13271 event pairs, 31 based on Foata normal form. 9/1751 useless extension candidates. Maximal degree in co-relation 7890. Up to 483 conditions per place. [2022-01-19 14:45:22,685 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 255 selfloop transitions, 331 changer transitions 37/664 dead transitions. [2022-01-19 14:45:22,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 664 transitions, 7611 flow [2022-01-19 14:45:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-19 14:45:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-01-19 14:45:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3363 transitions. [2022-01-19 14:45:22,689 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6410598551277163 [2022-01-19 14:45:22,689 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3363 transitions. [2022-01-19 14:45:22,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3363 transitions. [2022-01-19 14:45:22,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:22,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3363 transitions. [2022-01-19 14:45:22,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 55.131147540983605) internal successors, (3363), 61 states have internal predecessors, (3363), 0 states have call successors, (0), 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 14:45:22,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 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 14:45:22,700 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 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 14:45:22,700 INFO L186 Difference]: Start difference. First operand has 230 places, 332 transitions, 3004 flow. Second operand 61 states and 3363 transitions. [2022-01-19 14:45:22,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 664 transitions, 7611 flow [2022-01-19 14:45:22,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 664 transitions, 7140 flow, removed 138 selfloop flow, removed 20 redundant places. [2022-01-19 14:45:22,748 INFO L242 Difference]: Finished difference. Result has 299 places, 542 transitions, 6409 flow [2022-01-19 14:45:22,748 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=6409, PETRI_PLACES=299, PETRI_TRANSITIONS=542} [2022-01-19 14:45:22,750 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 223 predicate places. [2022-01-19 14:45:22,750 INFO L470 AbstractCegarLoop]: Abstraction has has 299 places, 542 transitions, 6409 flow [2022-01-19 14:45:22,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:45:22,751 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:22,751 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, 1, 1] [2022-01-19 14:45:22,767 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 14:45:22,951 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 14:45:22,951 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:22,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:22,952 INFO L85 PathProgramCache]: Analyzing trace with hash -596230533, now seen corresponding path program 4 times [2022-01-19 14:45:22,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:22,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171017241] [2022-01-19 14:45:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:22,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:23,159 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 14:45:23,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:23,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171017241] [2022-01-19 14:45:23,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171017241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:23,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653243759] [2022-01-19 14:45:23,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:45:23,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:23,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:23,161 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 14:45:23,161 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 14:45:23,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:45:23,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:23,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:45:23,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:23,526 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 14:45:23,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:23,961 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 14:45:23,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653243759] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:23,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:23,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:45:23,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128624037] [2022-01-19 14:45:23,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:23,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:45:23,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:23,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:45:23,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:45:23,964 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:45:23,965 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 542 transitions, 6409 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:45:23,965 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:23,965 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:45:23,965 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:26,470 INFO L129 PetriNetUnfolder]: 757/2442 cut-off events. [2022-01-19 14:45:26,471 INFO L130 PetriNetUnfolder]: For 18516/18567 co-relation queries the response was YES. [2022-01-19 14:45:26,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13333 conditions, 2442 events. 757/2442 cut-off events. For 18516/18567 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20302 event pairs, 59 based on Foata normal form. 11/2447 useless extension candidates. Maximal degree in co-relation 13254. Up to 786 conditions per place. [2022-01-19 14:45:26,497 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 342 selfloop transitions, 462 changer transitions 48/893 dead transitions. [2022-01-19 14:45:26,497 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 893 transitions, 12607 flow [2022-01-19 14:45:26,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-19 14:45:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-01-19 14:45:26,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3585 transitions. [2022-01-19 14:45:26,500 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6413237924865832 [2022-01-19 14:45:26,500 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3585 transitions. [2022-01-19 14:45:26,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3585 transitions. [2022-01-19 14:45:26,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:26,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3585 transitions. [2022-01-19 14:45:26,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 55.15384615384615) internal successors, (3585), 65 states have internal predecessors, (3585), 0 states have call successors, (0), 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 14:45:26,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 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 14:45:26,523 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 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 14:45:26,523 INFO L186 Difference]: Start difference. First operand has 299 places, 542 transitions, 6409 flow. Second operand 65 states and 3585 transitions. [2022-01-19 14:45:26,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 893 transitions, 12607 flow [2022-01-19 14:45:26,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 893 transitions, 12293 flow, removed 152 selfloop flow, removed 9 redundant places. [2022-01-19 14:45:26,639 INFO L242 Difference]: Finished difference. Result has 387 places, 757 transitions, 11210 flow [2022-01-19 14:45:26,640 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6247, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=11210, PETRI_PLACES=387, PETRI_TRANSITIONS=757} [2022-01-19 14:45:26,640 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 311 predicate places. [2022-01-19 14:45:26,640 INFO L470 AbstractCegarLoop]: Abstraction has has 387 places, 757 transitions, 11210 flow [2022-01-19 14:45:26,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:45:26,641 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:26,641 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, 1, 1] [2022-01-19 14:45:26,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-19 14:45:26,859 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 14:45:26,859 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:26,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:26,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1699910441, now seen corresponding path program 5 times [2022-01-19 14:45:26,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:26,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252091730] [2022-01-19 14:45:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:26,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:27,015 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 14:45:27,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:27,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252091730] [2022-01-19 14:45:27,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252091730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:27,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812871527] [2022-01-19 14:45:27,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:45:27,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:27,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:27,017 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 14:45:27,018 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 14:45:27,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:45:27,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:27,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:45:27,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:27,411 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 14:45:27,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:27,850 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 14:45:27,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812871527] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:27,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:27,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 14:45:27,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285591623] [2022-01-19 14:45:27,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:27,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 14:45:27,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:27,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 14:45:27,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 14:45:27,852 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:45:27,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 757 transitions, 11210 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 14:45:27,853 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:27,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:45:27,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:30,692 INFO L129 PetriNetUnfolder]: 792/2558 cut-off events. [2022-01-19 14:45:30,693 INFO L130 PetriNetUnfolder]: For 32950/32974 co-relation queries the response was YES. [2022-01-19 14:45:30,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16678 conditions, 2558 events. 792/2558 cut-off events. For 32950/32974 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21500 event pairs, 25 based on Foata normal form. 7/2563 useless extension candidates. Maximal degree in co-relation 16564. Up to 504 conditions per place. [2022-01-19 14:45:30,728 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 232 selfloop transitions, 633 changer transitions 38/944 dead transitions. [2022-01-19 14:45:30,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 944 transitions, 15762 flow [2022-01-19 14:45:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-19 14:45:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-01-19 14:45:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4176 transitions. [2022-01-19 14:45:30,753 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6389228886168911 [2022-01-19 14:45:30,753 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4176 transitions. [2022-01-19 14:45:30,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4176 transitions. [2022-01-19 14:45:30,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:30,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4176 transitions. [2022-01-19 14:45:30,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 54.94736842105263) internal successors, (4176), 76 states have internal predecessors, (4176), 0 states have call successors, (0), 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 14:45:30,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 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 14:45:30,764 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 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 14:45:30,764 INFO L186 Difference]: Start difference. First operand has 387 places, 757 transitions, 11210 flow. Second operand 76 states and 4176 transitions. [2022-01-19 14:45:30,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 944 transitions, 15762 flow [2022-01-19 14:45:30,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 944 transitions, 15182 flow, removed 285 selfloop flow, removed 8 redundant places. [2022-01-19 14:45:30,991 INFO L242 Difference]: Finished difference. Result has 456 places, 822 transitions, 13352 flow [2022-01-19 14:45:30,992 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=10830, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=13352, PETRI_PLACES=456, PETRI_TRANSITIONS=822} [2022-01-19 14:45:30,992 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 380 predicate places. [2022-01-19 14:45:30,992 INFO L470 AbstractCegarLoop]: Abstraction has has 456 places, 822 transitions, 13352 flow [2022-01-19 14:45:30,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 14:45:30,993 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:30,993 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, 1, 1] [2022-01-19 14:45:31,012 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 14:45:31,199 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 14:45:31,200 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:31,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:31,200 INFO L85 PathProgramCache]: Analyzing trace with hash 351983375, now seen corresponding path program 6 times [2022-01-19 14:45:31,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:31,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185574415] [2022-01-19 14:45:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:31,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:31,369 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 14:45:31,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:31,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185574415] [2022-01-19 14:45:31,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185574415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:31,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277931292] [2022-01-19 14:45:31,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:45:31,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:31,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:31,371 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 14:45:31,371 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 14:45:31,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 14:45:31,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:31,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:45:31,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:31,709 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 14:45:31,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:32,141 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 14:45:32,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277931292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:32,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:32,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:45:32,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784367905] [2022-01-19 14:45:32,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:32,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:45:32,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:32,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:45:32,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:45:32,144 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:45:32,145 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 822 transitions, 13352 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:45:32,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:32,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:45:32,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:34,720 INFO L129 PetriNetUnfolder]: 907/3024 cut-off events. [2022-01-19 14:45:34,720 INFO L130 PetriNetUnfolder]: For 48445/48480 co-relation queries the response was YES. [2022-01-19 14:45:34,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20947 conditions, 3024 events. 907/3024 cut-off events. For 48445/48480 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26809 event pairs, 100 based on Foata normal form. 5/3019 useless extension candidates. Maximal degree in co-relation 20828. Up to 1057 conditions per place. [2022-01-19 14:45:34,762 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 421 selfloop transitions, 567 changer transitions 50/1079 dead transitions. [2022-01-19 14:45:34,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1079 transitions, 19817 flow [2022-01-19 14:45:34,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-19 14:45:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-01-19 14:45:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3529 transitions. [2022-01-19 14:45:34,765 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6411700581395349 [2022-01-19 14:45:34,765 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3529 transitions. [2022-01-19 14:45:34,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3529 transitions. [2022-01-19 14:45:34,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:34,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3529 transitions. [2022-01-19 14:45:34,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 55.140625) internal successors, (3529), 64 states have internal predecessors, (3529), 0 states have call successors, (0), 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 14:45:34,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 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 14:45:34,774 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 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 14:45:34,774 INFO L186 Difference]: Start difference. First operand has 456 places, 822 transitions, 13352 flow. Second operand 64 states and 3529 transitions. [2022-01-19 14:45:34,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1079 transitions, 19817 flow [2022-01-19 14:45:35,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1079 transitions, 18789 flow, removed 174 selfloop flow, removed 40 redundant places. [2022-01-19 14:45:35,073 INFO L242 Difference]: Finished difference. Result has 497 places, 944 transitions, 17074 flow [2022-01-19 14:45:35,074 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=12570, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=17074, PETRI_PLACES=497, PETRI_TRANSITIONS=944} [2022-01-19 14:45:35,075 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 421 predicate places. [2022-01-19 14:45:35,075 INFO L470 AbstractCegarLoop]: Abstraction has has 497 places, 944 transitions, 17074 flow [2022-01-19 14:45:35,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:45:35,075 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:35,075 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, 1, 1] [2022-01-19 14:45:35,093 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 14:45:35,291 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 14:45:35,291 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:35,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:35,292 INFO L85 PathProgramCache]: Analyzing trace with hash -381220039, now seen corresponding path program 7 times [2022-01-19 14:45:35,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:35,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487153450] [2022-01-19 14:45:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:35,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:35,437 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 14:45:35,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:35,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487153450] [2022-01-19 14:45:35,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487153450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:35,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738036546] [2022-01-19 14:45:35,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:45:35,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:35,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:35,438 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 14:45:35,439 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 14:45:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:35,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:45:35,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:35,812 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 14:45:35,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:36,217 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 14:45:36,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738036546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:36,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:36,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 14:45:36,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104237048] [2022-01-19 14:45:36,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:36,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 14:45:36,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:36,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 14:45:36,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 14:45:36,220 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:45:36,221 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 944 transitions, 17074 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:45:36,221 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:36,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:45:36,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:39,814 INFO L129 PetriNetUnfolder]: 1130/3900 cut-off events. [2022-01-19 14:45:39,814 INFO L130 PetriNetUnfolder]: For 95550/95585 co-relation queries the response was YES. [2022-01-19 14:45:39,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29889 conditions, 3900 events. 1130/3900 cut-off events. For 95550/95585 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 37369 event pairs, 45 based on Foata normal form. 14/3910 useless extension candidates. Maximal degree in co-relation 29750. Up to 766 conditions per place. [2022-01-19 14:45:39,872 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 446 selfloop transitions, 830 changer transitions 31/1348 dead transitions. [2022-01-19 14:45:39,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1348 transitions, 27580 flow [2022-01-19 14:45:39,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-19 14:45:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-01-19 14:45:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4259 transitions. [2022-01-19 14:45:39,875 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6431591664149804 [2022-01-19 14:45:39,875 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4259 transitions. [2022-01-19 14:45:39,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4259 transitions. [2022-01-19 14:45:39,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:39,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4259 transitions. [2022-01-19 14:45:39,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 55.311688311688314) internal successors, (4259), 77 states have internal predecessors, (4259), 0 states have call successors, (0), 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 14:45:39,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 86.0) internal successors, (6708), 78 states have internal predecessors, (6708), 0 states have call successors, (0), 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 14:45:39,884 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 86.0) internal successors, (6708), 78 states have internal predecessors, (6708), 0 states have call successors, (0), 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 14:45:39,884 INFO L186 Difference]: Start difference. First operand has 497 places, 944 transitions, 17074 flow. Second operand 77 states and 4259 transitions. [2022-01-19 14:45:39,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1348 transitions, 27580 flow [2022-01-19 14:45:40,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1348 transitions, 26329 flow, removed 525 selfloop flow, removed 28 redundant places. [2022-01-19 14:45:40,582 INFO L242 Difference]: Finished difference. Result has 562 places, 1159 transitions, 23296 flow [2022-01-19 14:45:40,583 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=16312, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=636, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=23296, PETRI_PLACES=562, PETRI_TRANSITIONS=1159} [2022-01-19 14:45:40,583 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 486 predicate places. [2022-01-19 14:45:40,583 INFO L470 AbstractCegarLoop]: Abstraction has has 562 places, 1159 transitions, 23296 flow [2022-01-19 14:45:40,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:45:40,587 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:40,587 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, 1, 1] [2022-01-19 14:45:40,607 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 14:45:40,803 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 14:45:40,803 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:40,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1766817381, now seen corresponding path program 8 times [2022-01-19 14:45:40,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:40,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660372346] [2022-01-19 14:45:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:40,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:40,955 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 14:45:40,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:40,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660372346] [2022-01-19 14:45:40,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660372346] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:40,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475446881] [2022-01-19 14:45:40,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:45:40,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:40,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:40,957 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 14:45:40,958 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 14:45:41,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:45:41,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:41,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:45:41,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:41,322 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 14:45:41,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:41,742 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 14:45:41,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475446881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:41,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:41,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 14:45:41,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513513662] [2022-01-19 14:45:41,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:41,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 14:45:41,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 14:45:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 14:45:41,744 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:45:41,745 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 1159 transitions, 23296 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 14:45:41,745 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:41,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:45:41,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:45,493 INFO L129 PetriNetUnfolder]: 1131/3759 cut-off events. [2022-01-19 14:45:45,494 INFO L130 PetriNetUnfolder]: For 115420/115455 co-relation queries the response was YES. [2022-01-19 14:45:45,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31640 conditions, 3759 events. 1131/3759 cut-off events. For 115420/115455 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 35156 event pairs, 68 based on Foata normal form. 12/3764 useless extension candidates. Maximal degree in co-relation 31500. Up to 766 conditions per place. [2022-01-19 14:45:45,546 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 325 selfloop transitions, 876 changer transitions 46/1288 dead transitions. [2022-01-19 14:45:45,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1288 transitions, 27966 flow [2022-01-19 14:45:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-19 14:45:45,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-01-19 14:45:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 4384 transitions. [2022-01-19 14:45:45,549 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6372093023255814 [2022-01-19 14:45:45,549 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 4384 transitions. [2022-01-19 14:45:45,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 4384 transitions. [2022-01-19 14:45:45,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:45,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 4384 transitions. [2022-01-19 14:45:45,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 54.8) internal successors, (4384), 80 states have internal predecessors, (4384), 0 states have call successors, (0), 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 14:45:45,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 86.0) internal successors, (6966), 81 states have internal predecessors, (6966), 0 states have call successors, (0), 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 14:45:45,559 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 86.0) internal successors, (6966), 81 states have internal predecessors, (6966), 0 states have call successors, (0), 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 14:45:45,559 INFO L186 Difference]: Start difference. First operand has 562 places, 1159 transitions, 23296 flow. Second operand 80 states and 4384 transitions. [2022-01-19 14:45:45,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1288 transitions, 27966 flow [2022-01-19 14:45:46,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 1288 transitions, 26972 flow, removed 325 selfloop flow, removed 32 redundant places. [2022-01-19 14:45:46,268 INFO L242 Difference]: Finished difference. Result has 610 places, 1153 transitions, 24222 flow [2022-01-19 14:45:46,269 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=22503, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=868, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=24222, PETRI_PLACES=610, PETRI_TRANSITIONS=1153} [2022-01-19 14:45:46,269 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 534 predicate places. [2022-01-19 14:45:46,269 INFO L470 AbstractCegarLoop]: Abstraction has has 610 places, 1153 transitions, 24222 flow [2022-01-19 14:45:46,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 14:45:46,270 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:46,270 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, 1, 1] [2022-01-19 14:45:46,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 14:45:46,470 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 14:45:46,470 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:46,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:46,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1296723879, now seen corresponding path program 9 times [2022-01-19 14:45:46,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:46,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81470951] [2022-01-19 14:45:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:46,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:46,621 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 14:45:46,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:46,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81470951] [2022-01-19 14:45:46,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81470951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:46,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334538864] [2022-01-19 14:45:46,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:45:46,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:46,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:46,622 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 14:45:46,622 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 14:45:46,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 14:45:46,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:46,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:45:46,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:47,010 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 14:45:47,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:47,429 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 14:45:47,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334538864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:47,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:47,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 14:45:47,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393423602] [2022-01-19 14:45:47,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:47,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 14:45:47,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:47,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 14:45:47,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 14:45:47,432 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:45:47,432 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 1153 transitions, 24222 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:45:47,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:47,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:45:47,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:50,546 INFO L129 PetriNetUnfolder]: 1389/4472 cut-off events. [2022-01-19 14:45:50,546 INFO L130 PetriNetUnfolder]: For 142331/142366 co-relation queries the response was YES. [2022-01-19 14:45:50,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39489 conditions, 4472 events. 1389/4472 cut-off events. For 142331/142366 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 43173 event pairs, 96 based on Foata normal form. 8/4464 useless extension candidates. Maximal degree in co-relation 39351. Up to 1427 conditions per place. [2022-01-19 14:45:50,620 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 450 selfloop transitions, 1094 changer transitions 23/1608 dead transitions. [2022-01-19 14:45:50,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 1608 transitions, 37635 flow [2022-01-19 14:45:50,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-19 14:45:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-01-19 14:45:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3184 transitions. [2022-01-19 14:45:50,623 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6383319967923016 [2022-01-19 14:45:50,623 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3184 transitions. [2022-01-19 14:45:50,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3184 transitions. [2022-01-19 14:45:50,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:50,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3184 transitions. [2022-01-19 14:45:50,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 54.89655172413793) internal successors, (3184), 58 states have internal predecessors, (3184), 0 states have call successors, (0), 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 14:45:50,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 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 14:45:50,630 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 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 14:45:50,631 INFO L186 Difference]: Start difference. First operand has 610 places, 1153 transitions, 24222 flow. Second operand 58 states and 3184 transitions. [2022-01-19 14:45:50,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 1608 transitions, 37635 flow [2022-01-19 14:45:51,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 1608 transitions, 35381 flow, removed 57 selfloop flow, removed 69 redundant places. [2022-01-19 14:45:51,481 INFO L242 Difference]: Finished difference. Result has 600 places, 1498 transitions, 34421 flow [2022-01-19 14:45:51,482 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=22585, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=761, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=34421, PETRI_PLACES=600, PETRI_TRANSITIONS=1498} [2022-01-19 14:45:51,482 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 524 predicate places. [2022-01-19 14:45:51,482 INFO L470 AbstractCegarLoop]: Abstraction has has 600 places, 1498 transitions, 34421 flow [2022-01-19 14:45:51,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:45:51,482 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:51,482 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, 1, 1] [2022-01-19 14:45:51,498 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 14:45:51,684 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 14:45:51,685 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:51,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1628944037, now seen corresponding path program 10 times [2022-01-19 14:45:51,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:51,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782844450] [2022-01-19 14:45:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:51,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:51,844 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 14:45:51,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:51,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782844450] [2022-01-19 14:45:51,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782844450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:51,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689453472] [2022-01-19 14:45:51,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:45:51,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:51,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:51,845 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 14:45:51,846 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 14:45:51,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:45:51,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:51,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:45:51,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:52,210 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 14:45:52,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:52,583 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 14:45:52,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689453472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:52,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:52,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 14:45:52,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419519914] [2022-01-19 14:45:52,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:52,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 14:45:52,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:52,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 14:45:52,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 14:45:52,585 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:45:52,586 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 1498 transitions, 34421 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:45:52,586 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:52,586 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:45:52,586 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:56,794 INFO L129 PetriNetUnfolder]: 1542/5029 cut-off events. [2022-01-19 14:45:56,794 INFO L130 PetriNetUnfolder]: For 177983/178018 co-relation queries the response was YES. [2022-01-19 14:45:56,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45724 conditions, 5029 events. 1542/5029 cut-off events. For 177983/178018 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 50386 event pairs, 118 based on Foata normal form. 8/5019 useless extension candidates. Maximal degree in co-relation 45577. Up to 1425 conditions per place. [2022-01-19 14:45:56,884 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 426 selfloop transitions, 1299 changer transitions 53/1819 dead transitions. [2022-01-19 14:45:56,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 1819 transitions, 45250 flow [2022-01-19 14:45:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-19 14:45:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-01-19 14:45:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3752 transitions. [2022-01-19 14:45:56,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6415868673050615 [2022-01-19 14:45:56,887 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3752 transitions. [2022-01-19 14:45:56,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3752 transitions. [2022-01-19 14:45:56,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:56,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3752 transitions. [2022-01-19 14:45:56,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 55.1764705882353) internal successors, (3752), 68 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:45:56,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 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 14:45:56,894 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 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 14:45:56,894 INFO L186 Difference]: Start difference. First operand has 600 places, 1498 transitions, 34421 flow. Second operand 68 states and 3752 transitions. [2022-01-19 14:45:56,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 1819 transitions, 45250 flow [2022-01-19 14:45:58,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 1819 transitions, 44072 flow, removed 409 selfloop flow, removed 21 redundant places. [2022-01-19 14:45:58,331 INFO L242 Difference]: Finished difference. Result has 662 places, 1680 transitions, 41710 flow [2022-01-19 14:45:58,332 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=33397, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=41710, PETRI_PLACES=662, PETRI_TRANSITIONS=1680} [2022-01-19 14:45:58,333 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 586 predicate places. [2022-01-19 14:45:58,334 INFO L470 AbstractCegarLoop]: Abstraction has has 662 places, 1680 transitions, 41710 flow [2022-01-19 14:45:58,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:45:58,334 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:58,334 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, 1, 1] [2022-01-19 14:45:58,353 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 14:45:58,543 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 14:45:58,543 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:58,544 INFO L85 PathProgramCache]: Analyzing trace with hash -815631631, now seen corresponding path program 11 times [2022-01-19 14:45:58,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:58,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115806512] [2022-01-19 14:45:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:58,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:58,738 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 14:45:58,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:58,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115806512] [2022-01-19 14:45:58,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115806512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:58,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628909379] [2022-01-19 14:45:58,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:45:58,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:58,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:58,740 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 14:45:58,741 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 14:45:58,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:45:58,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:58,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:45:58,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:59,144 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 14:45:59,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:59,556 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 14:45:59,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628909379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:59,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:59,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 14:45:59,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555544830] [2022-01-19 14:45:59,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:59,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 14:45:59,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:59,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 14:45:59,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 14:45:59,558 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:45:59,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 1680 transitions, 41710 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 14:45:59,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:59,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:45:59,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:46:03,380 INFO L129 PetriNetUnfolder]: 1479/4684 cut-off events. [2022-01-19 14:46:03,380 INFO L130 PetriNetUnfolder]: For 177210/177234 co-relation queries the response was YES. [2022-01-19 14:46:03,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44895 conditions, 4684 events. 1479/4684 cut-off events. For 177210/177234 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 45371 event pairs, 101 based on Foata normal form. 7/4685 useless extension candidates. Maximal degree in co-relation 44739. Up to 1349 conditions per place. [2022-01-19 14:46:03,469 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 543 selfloop transitions, 1161 changer transitions 26/1771 dead transitions. [2022-01-19 14:46:03,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 1771 transitions, 46862 flow [2022-01-19 14:46:03,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-19 14:46:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-01-19 14:46:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3405 transitions. [2022-01-19 14:46:03,472 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6385971492873218 [2022-01-19 14:46:03,472 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3405 transitions. [2022-01-19 14:46:03,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3405 transitions. [2022-01-19 14:46:03,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:46:03,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3405 transitions. [2022-01-19 14:46:03,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 54.91935483870968) internal successors, (3405), 62 states have internal predecessors, (3405), 0 states have call successors, (0), 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 14:46:03,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 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 14:46:03,478 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 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 14:46:03,478 INFO L186 Difference]: Start difference. First operand has 662 places, 1680 transitions, 41710 flow. Second operand 62 states and 3405 transitions. [2022-01-19 14:46:03,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 1771 transitions, 46862 flow [2022-01-19 14:46:05,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 1771 transitions, 45530 flow, removed 278 selfloop flow, removed 37 redundant places. [2022-01-19 14:46:05,190 INFO L242 Difference]: Finished difference. Result has 690 places, 1692 transitions, 43205 flow [2022-01-19 14:46:05,191 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=40459, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=43205, PETRI_PLACES=690, PETRI_TRANSITIONS=1692} [2022-01-19 14:46:05,192 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 614 predicate places. [2022-01-19 14:46:05,192 INFO L470 AbstractCegarLoop]: Abstraction has has 690 places, 1692 transitions, 43205 flow [2022-01-19 14:46:05,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 14:46:05,192 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:46:05,192 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, 1, 1] [2022-01-19 14:46:05,212 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 14:46:05,399 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 14:46:05,400 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:46:05,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:46:05,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1921340575, now seen corresponding path program 12 times [2022-01-19 14:46:05,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:46:05,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606024172] [2022-01-19 14:46:05,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:46:05,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:46:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:46:05,578 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 14:46:05,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:46:05,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606024172] [2022-01-19 14:46:05,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606024172] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:46:05,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993463212] [2022-01-19 14:46:05,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:46:05,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:46:05,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:46:05,600 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 14:46:05,601 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 14:46:05,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 14:46:05,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:46:05,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:46:05,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:46:05,978 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 14:46:05,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:46:06,408 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 14:46:06,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993463212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:46:06,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:46:06,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 14:46:06,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546131076] [2022-01-19 14:46:06,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:46:06,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 14:46:06,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:46:06,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 14:46:06,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 14:46:06,411 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:46:06,412 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 1692 transitions, 43205 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:46:06,412 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:46:06,412 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:46:06,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:46:09,684 INFO L129 PetriNetUnfolder]: 1561/4845 cut-off events. [2022-01-19 14:46:09,685 INFO L130 PetriNetUnfolder]: For 189682/189706 co-relation queries the response was YES. [2022-01-19 14:46:09,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48552 conditions, 4845 events. 1561/4845 cut-off events. For 189682/189706 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 46770 event pairs, 116 based on Foata normal form. 5/4837 useless extension candidates. Maximal degree in co-relation 48390. Up to 2011 conditions per place. [2022-01-19 14:46:09,768 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 754 selfloop transitions, 1114 changer transitions 14/1923 dead transitions. [2022-01-19 14:46:09,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 1923 transitions, 52668 flow [2022-01-19 14:46:09,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-19 14:46:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-01-19 14:46:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2211 transitions. [2022-01-19 14:46:09,770 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6427325581395349 [2022-01-19 14:46:09,771 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2211 transitions. [2022-01-19 14:46:09,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2211 transitions. [2022-01-19 14:46:09,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:46:09,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2211 transitions. [2022-01-19 14:46:09,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.275) internal successors, (2211), 40 states have internal predecessors, (2211), 0 states have call successors, (0), 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 14:46:09,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 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 14:46:09,775 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 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 14:46:09,775 INFO L186 Difference]: Start difference. First operand has 690 places, 1692 transitions, 43205 flow. Second operand 40 states and 2211 transitions. [2022-01-19 14:46:09,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 1923 transitions, 52668 flow [2022-01-19 14:46:11,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 691 places, 1923 transitions, 52017 flow, removed 82 selfloop flow, removed 30 redundant places. [2022-01-19 14:46:11,198 INFO L242 Difference]: Finished difference. Result has 708 places, 1847 transitions, 50811 flow [2022-01-19 14:46:11,199 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=42646, PETRI_DIFFERENCE_MINUEND_PLACES=652, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=980, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=50811, PETRI_PLACES=708, PETRI_TRANSITIONS=1847} [2022-01-19 14:46:11,199 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 632 predicate places. [2022-01-19 14:46:11,199 INFO L470 AbstractCegarLoop]: Abstraction has has 708 places, 1847 transitions, 50811 flow [2022-01-19 14:46:11,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:46:11,200 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:46:11,200 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, 1, 1] [2022-01-19 14:46:11,221 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 14:46:11,415 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 14:46:11,415 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:46:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:46:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash 394267245, now seen corresponding path program 13 times [2022-01-19 14:46:11,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:46:11,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714371760] [2022-01-19 14:46:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:46:11,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:46:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:46:11,578 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 14:46:11,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:46:11,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714371760] [2022-01-19 14:46:11,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714371760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:46:11,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694977285] [2022-01-19 14:46:11,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:46:11,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:46:11,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:46:11,580 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 14:46:11,581 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 14:46:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:46:11,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:46:11,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:46:12,004 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 14:46:12,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:46:12,425 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 14:46:12,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694977285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:46:12,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:46:12,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 14:46:12,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655628825] [2022-01-19 14:46:12,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:46:12,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 14:46:12,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:46:12,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 14:46:12,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 14:46:12,427 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:46:12,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 1847 transitions, 50811 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:46:12,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:46:12,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:46:12,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:46:16,596 INFO L129 PetriNetUnfolder]: 1604/5007 cut-off events. [2022-01-19 14:46:16,597 INFO L130 PetriNetUnfolder]: For 206273/206301 co-relation queries the response was YES. [2022-01-19 14:46:16,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52641 conditions, 5007 events. 1604/5007 cut-off events. For 206273/206301 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 48902 event pairs, 125 based on Foata normal form. 6/4997 useless extension candidates. Maximal degree in co-relation 52472. Up to 1869 conditions per place. [2022-01-19 14:46:16,746 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 633 selfloop transitions, 1309 changer transitions 21/2004 dead transitions. [2022-01-19 14:46:16,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 754 places, 2004 transitions, 58885 flow [2022-01-19 14:46:16,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-19 14:46:16,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-01-19 14:46:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2766 transitions. [2022-01-19 14:46:16,749 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6432558139534884 [2022-01-19 14:46:16,749 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2766 transitions. [2022-01-19 14:46:16,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2766 transitions. [2022-01-19 14:46:16,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:46:16,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2766 transitions. [2022-01-19 14:46:16,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 55.32) internal successors, (2766), 50 states have internal predecessors, (2766), 0 states have call successors, (0), 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 14:46:16,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 86.0) internal successors, (4386), 51 states have internal predecessors, (4386), 0 states have call successors, (0), 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 14:46:16,753 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 86.0) internal successors, (4386), 51 states have internal predecessors, (4386), 0 states have call successors, (0), 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 14:46:16,754 INFO L186 Difference]: Start difference. First operand has 708 places, 1847 transitions, 50811 flow. Second operand 50 states and 2766 transitions. [2022-01-19 14:46:16,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 754 places, 2004 transitions, 58885 flow [2022-01-19 14:46:18,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 2004 transitions, 58597 flow, removed 129 selfloop flow, removed 8 redundant places. [2022-01-19 14:46:18,509 INFO L242 Difference]: Finished difference. Result has 759 places, 1905 transitions, 55617 flow [2022-01-19 14:46:18,511 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=50585, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=55617, PETRI_PLACES=759, PETRI_TRANSITIONS=1905} [2022-01-19 14:46:18,511 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 683 predicate places. [2022-01-19 14:46:18,511 INFO L470 AbstractCegarLoop]: Abstraction has has 759 places, 1905 transitions, 55617 flow [2022-01-19 14:46:18,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:46:18,512 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:46:18,512 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, 1, 1] [2022-01-19 14:46:18,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 14:46:18,717 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 14:46:18,717 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:46:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:46:18,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1033346749, now seen corresponding path program 14 times [2022-01-19 14:46:18,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:46:18,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570473202] [2022-01-19 14:46:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:46:18,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:46:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:46:18,892 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 14:46:18,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:46:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570473202] [2022-01-19 14:46:18,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570473202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:46:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824050242] [2022-01-19 14:46:18,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:46:18,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:46:18,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:46:18,894 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 14:46:18,895 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 14:46:18,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:46:18,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:46:18,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:46:18,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:46:19,333 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 14:46:19,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:46:19,729 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 14:46:19,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824050242] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:46:19,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:46:19,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 14:46:19,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604497408] [2022-01-19 14:46:19,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:46:19,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 14:46:19,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:46:19,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 14:46:19,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 14:46:19,732 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:46:19,733 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 1905 transitions, 55617 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:46:19,733 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:46:19,733 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:46:19,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:46:24,006 INFO L129 PetriNetUnfolder]: 1642/5123 cut-off events. [2022-01-19 14:46:24,006 INFO L130 PetriNetUnfolder]: For 236579/236607 co-relation queries the response was YES. [2022-01-19 14:46:24,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57138 conditions, 5123 events. 1642/5123 cut-off events. For 236579/236607 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 50279 event pairs, 122 based on Foata normal form. 6/5112 useless extension candidates. Maximal degree in co-relation 56958. Up to 2003 conditions per place. [2022-01-19 14:46:24,163 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 679 selfloop transitions, 1414 changer transitions 19/2153 dead transitions. [2022-01-19 14:46:24,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 806 places, 2153 transitions, 66549 flow [2022-01-19 14:46:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-19 14:46:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-01-19 14:46:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2806 transitions. [2022-01-19 14:46:24,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6397628818969449 [2022-01-19 14:46:24,166 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2806 transitions. [2022-01-19 14:46:24,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2806 transitions. [2022-01-19 14:46:24,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:46:24,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2806 transitions. [2022-01-19 14:46:24,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 55.01960784313726) internal successors, (2806), 51 states have internal predecessors, (2806), 0 states have call successors, (0), 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 14:46:24,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 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 14:46:24,172 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 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 14:46:24,173 INFO L186 Difference]: Start difference. First operand has 759 places, 1905 transitions, 55617 flow. Second operand 51 states and 2806 transitions. [2022-01-19 14:46:24,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 806 places, 2153 transitions, 66549 flow [2022-01-19 14:46:26,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 772 places, 2153 transitions, 65360 flow, removed 170 selfloop flow, removed 34 redundant places. [2022-01-19 14:46:26,409 INFO L242 Difference]: Finished difference. Result has 790 places, 2055 transitions, 64059 flow [2022-01-19 14:46:26,411 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=54497, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=64059, PETRI_PLACES=790, PETRI_TRANSITIONS=2055} [2022-01-19 14:46:26,411 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 714 predicate places. [2022-01-19 14:46:26,411 INFO L470 AbstractCegarLoop]: Abstraction has has 790 places, 2055 transitions, 64059 flow [2022-01-19 14:46:26,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:46:26,411 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:46:26,411 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, 1, 1] [2022-01-19 14:46:26,427 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 14:46:26,612 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 14:46:26,612 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:46:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:46:26,613 INFO L85 PathProgramCache]: Analyzing trace with hash -20529845, now seen corresponding path program 15 times [2022-01-19 14:46:26,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:46:26,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330723299] [2022-01-19 14:46:26,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:46:26,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:46:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:46:26,788 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 14:46:26,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:46:26,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330723299] [2022-01-19 14:46:26,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330723299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:46:26,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730568160] [2022-01-19 14:46:26,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:46:26,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:46:26,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:46:26,789 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 14:46:26,790 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 14:46:26,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 14:46:26,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:46:26,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:46:26,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:46:27,227 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 14:46:27,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:46:27,678 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 14:46:27,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730568160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:46:27,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:46:27,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 14:46:27,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595867888] [2022-01-19 14:46:27,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:46:27,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 14:46:27,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:46:27,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 14:46:27,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 14:46:27,680 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:46:27,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 790 places, 2055 transitions, 64059 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 14:46:27,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:46:27,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:46:27,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:46:32,349 INFO L129 PetriNetUnfolder]: 1642/5097 cut-off events. [2022-01-19 14:46:32,350 INFO L130 PetriNetUnfolder]: For 262727/262751 co-relation queries the response was YES. [2022-01-19 14:46:32,420 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60095 conditions, 5097 events. 1642/5097 cut-off events. For 262727/262751 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 49894 event pairs, 102 based on Foata normal form. 5/5090 useless extension candidates. Maximal degree in co-relation 59902. Up to 1811 conditions per place. [2022-01-19 14:46:32,453 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 877 selfloop transitions, 1207 changer transitions 17/2142 dead transitions. [2022-01-19 14:46:32,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 2142 transitions, 70246 flow [2022-01-19 14:46:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-19 14:46:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-01-19 14:46:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2693 transitions. [2022-01-19 14:46:32,455 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6390602752728999 [2022-01-19 14:46:32,455 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2693 transitions. [2022-01-19 14:46:32,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2693 transitions. [2022-01-19 14:46:32,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:46:32,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2693 transitions. [2022-01-19 14:46:32,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 54.95918367346939) internal successors, (2693), 49 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:46:32,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 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 14:46:32,460 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 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 14:46:32,460 INFO L186 Difference]: Start difference. First operand has 790 places, 2055 transitions, 64059 flow. Second operand 49 states and 2693 transitions. [2022-01-19 14:46:32,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 2142 transitions, 70246 flow [2022-01-19 14:46:34,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 815 places, 2142 transitions, 69462 flow, removed 172 selfloop flow, removed 19 redundant places. [2022-01-19 14:46:34,933 INFO L242 Difference]: Finished difference. Result has 821 places, 2059 transitions, 65992 flow [2022-01-19 14:46:34,934 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=63317, PETRI_DIFFERENCE_MINUEND_PLACES=767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=849, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=65992, PETRI_PLACES=821, PETRI_TRANSITIONS=2059} [2022-01-19 14:46:34,934 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 745 predicate places. [2022-01-19 14:46:34,934 INFO L470 AbstractCegarLoop]: Abstraction has has 821 places, 2059 transitions, 65992 flow [2022-01-19 14:46:34,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 14:46:34,935 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:46:34,935 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, 1, 1] [2022-01-19 14:46:34,950 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 14:46:35,135 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 14:46:35,135 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:46:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:46:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1636260209, now seen corresponding path program 16 times [2022-01-19 14:46:35,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:46:35,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585065530] [2022-01-19 14:46:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:46:35,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:46:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:46:35,285 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 14:46:35,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:46:35,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585065530] [2022-01-19 14:46:35,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585065530] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:46:35,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661433208] [2022-01-19 14:46:35,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:46:35,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:46:35,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:46:35,287 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 14:46:35,287 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 14:46:35,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:46:35,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:46:35,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:46:35,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:46:35,723 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 14:46:35,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:46:36,104 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 14:46:36,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661433208] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:46:36,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:46:36,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 14:46:36,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465687449] [2022-01-19 14:46:36,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:46:36,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 14:46:36,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:46:36,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 14:46:36,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 14:46:36,106 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:46:36,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 2059 transitions, 65992 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:46:36,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:46:36,107 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:46:36,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:46:41,228 INFO L129 PetriNetUnfolder]: 1636/5148 cut-off events. [2022-01-19 14:46:41,229 INFO L130 PetriNetUnfolder]: For 271632/271678 co-relation queries the response was YES. [2022-01-19 14:46:41,289 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61599 conditions, 5148 events. 1636/5148 cut-off events. For 271632/271678 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 50801 event pairs, 117 based on Foata normal form. 10/5145 useless extension candidates. Maximal degree in co-relation 61403. Up to 1951 conditions per place. [2022-01-19 14:46:41,319 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 695 selfloop transitions, 1447 changer transitions 34/2217 dead transitions. [2022-01-19 14:46:41,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 872 places, 2217 transitions, 74598 flow [2022-01-19 14:46:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 14:46:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 14:46:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3151 transitions. [2022-01-19 14:46:41,322 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6427988576091391 [2022-01-19 14:46:41,322 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3151 transitions. [2022-01-19 14:46:41,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3151 transitions. [2022-01-19 14:46:41,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:46:41,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3151 transitions. [2022-01-19 14:46:41,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 55.280701754385966) internal successors, (3151), 57 states have internal predecessors, (3151), 0 states have call successors, (0), 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 14:46:41,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 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 14:46:41,327 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 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 14:46:41,327 INFO L186 Difference]: Start difference. First operand has 821 places, 2059 transitions, 65992 flow. Second operand 57 states and 3151 transitions. [2022-01-19 14:46:41,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 872 places, 2217 transitions, 74598 flow [2022-01-19 14:46:43,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 839 places, 2217 transitions, 74057 flow, removed 49 selfloop flow, removed 33 redundant places. [2022-01-19 14:46:43,637 INFO L242 Difference]: Finished difference. Result has 858 places, 2092 transitions, 71898 flow [2022-01-19 14:46:43,639 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=65502, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2059, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=71898, PETRI_PLACES=858, PETRI_TRANSITIONS=2092} [2022-01-19 14:46:43,639 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 782 predicate places. [2022-01-19 14:46:43,639 INFO L470 AbstractCegarLoop]: Abstraction has has 858 places, 2092 transitions, 71898 flow [2022-01-19 14:46:43,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:46:43,640 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:46:43,640 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, 1, 1] [2022-01-19 14:46:43,655 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 14:46:43,855 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 14:46:43,855 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:46:43,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:46:43,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1095262929, now seen corresponding path program 17 times [2022-01-19 14:46:43,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:46:43,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909030923] [2022-01-19 14:46:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:46:43,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:46:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:46:44,020 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 14:46:44,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:46:44,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909030923] [2022-01-19 14:46:44,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909030923] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:46:44,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295967732] [2022-01-19 14:46:44,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:46:44,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:46:44,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:46:44,022 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 14:46:44,023 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 14:46:44,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:46:44,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:46:44,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:46:44,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:46:44,491 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 14:46:44,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:46:44,918 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 14:46:44,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295967732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:46:44,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:46:44,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 14:46:44,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883767106] [2022-01-19 14:46:44,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:46:44,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 14:46:44,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:46:44,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 14:46:44,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 14:46:44,920 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:46:44,921 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 858 places, 2092 transitions, 71898 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:46:44,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:46:44,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:46:44,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:46:49,505 INFO L129 PetriNetUnfolder]: 1611/4966 cut-off events. [2022-01-19 14:46:49,505 INFO L130 PetriNetUnfolder]: For 303280/303315 co-relation queries the response was YES. [2022-01-19 14:46:49,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64133 conditions, 4966 events. 1611/4966 cut-off events. For 303280/303315 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 48049 event pairs, 122 based on Foata normal form. 9/4964 useless extension candidates. Maximal degree in co-relation 63927. Up to 1830 conditions per place. [2022-01-19 14:46:49,608 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 895 selfloop transitions, 1222 changer transitions 18/2176 dead transitions. [2022-01-19 14:46:49,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 896 places, 2176 transitions, 78068 flow [2022-01-19 14:46:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-19 14:46:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-01-19 14:46:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2375 transitions. [2022-01-19 14:46:49,610 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6422390481341266 [2022-01-19 14:46:49,610 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2375 transitions. [2022-01-19 14:46:49,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2375 transitions. [2022-01-19 14:46:49,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:46:49,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2375 transitions. [2022-01-19 14:46:49,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 55.23255813953488) internal successors, (2375), 43 states have internal predecessors, (2375), 0 states have call successors, (0), 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 14:46:49,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 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 14:46:49,614 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 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 14:46:49,614 INFO L186 Difference]: Start difference. First operand has 858 places, 2092 transitions, 71898 flow. Second operand 43 states and 2375 transitions. [2022-01-19 14:46:49,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 896 places, 2176 transitions, 78068 flow [2022-01-19 14:46:52,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 869 places, 2176 transitions, 77108 flow, removed 262 selfloop flow, removed 27 redundant places. [2022-01-19 14:46:52,621 INFO L242 Difference]: Finished difference. Result has 873 places, 2099 transitions, 73651 flow [2022-01-19 14:46:52,622 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=71012, PETRI_DIFFERENCE_MINUEND_PLACES=827, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2092, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=876, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=73651, PETRI_PLACES=873, PETRI_TRANSITIONS=2099} [2022-01-19 14:46:52,623 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 797 predicate places. [2022-01-19 14:46:52,623 INFO L470 AbstractCegarLoop]: Abstraction has has 873 places, 2099 transitions, 73651 flow [2022-01-19 14:46:52,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 14:46:52,623 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:46:52,623 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, 1, 1] [2022-01-19 14:46:52,645 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 14:46:52,839 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 14:46:52,839 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:46:52,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:46:52,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1335362405, now seen corresponding path program 18 times [2022-01-19 14:46:52,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:46:52,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425875902] [2022-01-19 14:46:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:46:52,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:46:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:46:52,992 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 14:46:52,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:46:52,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425875902] [2022-01-19 14:46:52,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425875902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:46:52,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100651294] [2022-01-19 14:46:52,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:46:52,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:46:52,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:46:52,993 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 14:46:53,011 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 14:46:53,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 14:46:53,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:46:53,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:46:53,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:46:53,456 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 14:46:53,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:46:53,880 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 14:46:53,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100651294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:46:53,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:46:53,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:46:53,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425637476] [2022-01-19 14:46:53,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:46:53,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:46:53,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:46:53,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:46:53,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:46:53,883 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:46:53,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 873 places, 2099 transitions, 73651 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:46:53,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:46:53,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:46:53,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:46:59,625 INFO L129 PetriNetUnfolder]: 1638/5072 cut-off events. [2022-01-19 14:46:59,626 INFO L130 PetriNetUnfolder]: For 318465/318489 co-relation queries the response was YES. [2022-01-19 14:46:59,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66629 conditions, 5072 events. 1638/5072 cut-off events. For 318465/318489 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 49496 event pairs, 87 based on Foata normal form. 8/5067 useless extension candidates. Maximal degree in co-relation 66425. Up to 1728 conditions per place. [2022-01-19 14:46:59,724 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 793 selfloop transitions, 1419 changer transitions 52/2305 dead transitions. [2022-01-19 14:46:59,724 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 933 places, 2305 transitions, 83942 flow [2022-01-19 14:46:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-19 14:46:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-01-19 14:46:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3582 transitions. [2022-01-19 14:46:59,726 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6407871198568873 [2022-01-19 14:46:59,726 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3582 transitions. [2022-01-19 14:46:59,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3582 transitions. [2022-01-19 14:46:59,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:46:59,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3582 transitions. [2022-01-19 14:46:59,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 55.10769230769231) internal successors, (3582), 65 states have internal predecessors, (3582), 0 states have call successors, (0), 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 14:46:59,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 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 14:46:59,732 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 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 14:46:59,732 INFO L186 Difference]: Start difference. First operand has 873 places, 2099 transitions, 73651 flow. Second operand 65 states and 3582 transitions. [2022-01-19 14:46:59,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 933 places, 2305 transitions, 83942 flow [2022-01-19 14:47:02,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 907 places, 2305 transitions, 83246 flow, removed 130 selfloop flow, removed 26 redundant places. [2022-01-19 14:47:02,577 INFO L242 Difference]: Finished difference. Result has 920 places, 2126 transitions, 77443 flow [2022-01-19 14:47:02,579 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=73098, PETRI_DIFFERENCE_MINUEND_PLACES=843, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2099, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=77443, PETRI_PLACES=920, PETRI_TRANSITIONS=2126} [2022-01-19 14:47:02,579 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 844 predicate places. [2022-01-19 14:47:02,579 INFO L470 AbstractCegarLoop]: Abstraction has has 920 places, 2126 transitions, 77443 flow [2022-01-19 14:47:02,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:47:02,580 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:47:02,580 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, 1, 1] [2022-01-19 14:47:02,595 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 14:47:02,780 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 14:47:02,780 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:47:02,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:47:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1138470815, now seen corresponding path program 19 times [2022-01-19 14:47:02,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:47:02,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417928242] [2022-01-19 14:47:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:47:02,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:47:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:47:02,946 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 14:47:02,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:47:02,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417928242] [2022-01-19 14:47:02,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417928242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:47:02,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044420689] [2022-01-19 14:47:02,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:47:02,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:47:02,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:47:02,948 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 14:47:02,949 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 14:47:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:47:03,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:47:03,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:47:03,327 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 14:47:03,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:47:03,762 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 14:47:03,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044420689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:47:03,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:47:03,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-01-19 14:47:03,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939703977] [2022-01-19 14:47:03,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:47:03,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 14:47:03,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:47:03,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 14:47:03,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-01-19 14:47:03,764 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:47:03,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 920 places, 2126 transitions, 77443 flow. Second operand has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 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 14:47:03,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:47:03,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:47:03,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:47:10,633 INFO L129 PetriNetUnfolder]: 1839/5735 cut-off events. [2022-01-19 14:47:10,633 INFO L130 PetriNetUnfolder]: For 387373/387407 co-relation queries the response was YES. [2022-01-19 14:47:10,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78140 conditions, 5735 events. 1839/5735 cut-off events. For 387373/387407 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 57568 event pairs, 92 based on Foata normal form. 12/5730 useless extension candidates. Maximal degree in co-relation 77928. Up to 2331 conditions per place. [2022-01-19 14:47:10,765 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1045 selfloop transitions, 1548 changer transitions 37/2671 dead transitions. [2022-01-19 14:47:10,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 981 places, 2671 transitions, 101201 flow [2022-01-19 14:47:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-19 14:47:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-01-19 14:47:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4075 transitions. [2022-01-19 14:47:10,767 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6403205531112508 [2022-01-19 14:47:10,767 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4075 transitions. [2022-01-19 14:47:10,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4075 transitions. [2022-01-19 14:47:10,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:47:10,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4075 transitions. [2022-01-19 14:47:10,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 55.067567567567565) internal successors, (4075), 74 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:47:10,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 86.0) internal successors, (6450), 75 states have internal predecessors, (6450), 0 states have call successors, (0), 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 14:47:10,774 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 86.0) internal successors, (6450), 75 states have internal predecessors, (6450), 0 states have call successors, (0), 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 14:47:10,774 INFO L186 Difference]: Start difference. First operand has 920 places, 2126 transitions, 77443 flow. Second operand 74 states and 4075 transitions. [2022-01-19 14:47:10,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 981 places, 2671 transitions, 101201 flow [2022-01-19 14:47:14,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 936 places, 2671 transitions, 98546 flow, removed 230 selfloop flow, removed 45 redundant places. [2022-01-19 14:47:14,910 INFO L242 Difference]: Finished difference. Result has 988 places, 2530 transitions, 97084 flow [2022-01-19 14:47:14,911 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=75525, PETRI_DIFFERENCE_MINUEND_PLACES=863, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=97084, PETRI_PLACES=988, PETRI_TRANSITIONS=2530} [2022-01-19 14:47:14,912 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 912 predicate places. [2022-01-19 14:47:14,912 INFO L470 AbstractCegarLoop]: Abstraction has has 988 places, 2530 transitions, 97084 flow [2022-01-19 14:47:14,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 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 14:47:14,912 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:47:14,912 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, 1, 1] [2022-01-19 14:47:14,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-19 14:47:15,112 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 14:47:15,113 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:47:15,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:47:15,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1734421807, now seen corresponding path program 20 times [2022-01-19 14:47:15,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:47:15,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281120406] [2022-01-19 14:47:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:47:15,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:47:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:47:15,287 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 14:47:15,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:47:15,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281120406] [2022-01-19 14:47:15,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281120406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:47:15,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584017564] [2022-01-19 14:47:15,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:47:15,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:47:15,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:47:15,289 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 14:47:15,289 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 14:47:15,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:47:15,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:47:15,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:47:15,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:47:15,636 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 14:47:15,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:47:16,038 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 14:47:16,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584017564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:47:16,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:47:16,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-01-19 14:47:16,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711204804] [2022-01-19 14:47:16,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:47:16,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 14:47:16,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:47:16,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 14:47:16,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2022-01-19 14:47:16,040 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:47:16,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 988 places, 2530 transitions, 97084 flow. Second operand has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 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 14:47:16,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:47:16,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:47:16,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:47:22,037 INFO L129 PetriNetUnfolder]: 1868/5764 cut-off events. [2022-01-19 14:47:22,037 INFO L130 PetriNetUnfolder]: For 416492/416530 co-relation queries the response was YES. [2022-01-19 14:47:22,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82376 conditions, 5764 events. 1868/5764 cut-off events. For 416492/416530 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 57580 event pairs, 95 based on Foata normal form. 9/5756 useless extension candidates. Maximal degree in co-relation 82123. Up to 2548 conditions per place. [2022-01-19 14:47:22,208 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1197 selfloop transitions, 1418 changer transitions 20/2676 dead transitions. [2022-01-19 14:47:22,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1014 places, 2676 transitions, 106917 flow [2022-01-19 14:47:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-19 14:47:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-01-19 14:47:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2054 transitions. [2022-01-19 14:47:22,212 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6455059710873664 [2022-01-19 14:47:22,212 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2054 transitions. [2022-01-19 14:47:22,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2054 transitions. [2022-01-19 14:47:22,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:47:22,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2054 transitions. [2022-01-19 14:47:22,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.513513513513516) internal successors, (2054), 37 states have internal predecessors, (2054), 0 states have call successors, (0), 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 14:47:22,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 86.0) internal successors, (3268), 38 states have internal predecessors, (3268), 0 states have call successors, (0), 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 14:47:22,216 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 86.0) internal successors, (3268), 38 states have internal predecessors, (3268), 0 states have call successors, (0), 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 14:47:22,216 INFO L186 Difference]: Start difference. First operand has 988 places, 2530 transitions, 97084 flow. Second operand 37 states and 2054 transitions. [2022-01-19 14:47:22,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1014 places, 2676 transitions, 106917 flow [2022-01-19 14:47:26,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 997 places, 2676 transitions, 104859 flow, removed 999 selfloop flow, removed 17 redundant places. [2022-01-19 14:47:26,959 INFO L242 Difference]: Finished difference. Result has 1013 places, 2577 transitions, 102801 flow [2022-01-19 14:47:26,961 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=95460, PETRI_DIFFERENCE_MINUEND_PLACES=961, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=102801, PETRI_PLACES=1013, PETRI_TRANSITIONS=2577} [2022-01-19 14:47:26,962 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 937 predicate places. [2022-01-19 14:47:26,962 INFO L470 AbstractCegarLoop]: Abstraction has has 1013 places, 2577 transitions, 102801 flow [2022-01-19 14:47:26,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 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 14:47:26,962 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:47:26,962 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, 1, 1] [2022-01-19 14:47:26,985 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 14:47:27,162 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 14:47:27,163 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:47:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:47:27,163 INFO L85 PathProgramCache]: Analyzing trace with hash 541108433, now seen corresponding path program 21 times [2022-01-19 14:47:27,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:47:27,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433353523] [2022-01-19 14:47:27,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:47:27,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:47:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:47:27,321 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 14:47:27,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:47:27,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433353523] [2022-01-19 14:47:27,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433353523] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:47:27,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11839416] [2022-01-19 14:47:27,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:47:27,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:47:27,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:47:27,322 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 14:47:27,322 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 14:47:27,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 14:47:27,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:47:27,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:47:27,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:47:27,706 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 14:47:27,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:47:28,211 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 14:47:28,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11839416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:47:28,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:47:28,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:47:28,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365671592] [2022-01-19 14:47:28,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:47:28,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:47:28,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:47:28,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:47:28,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:47:28,212 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:47:28,213 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1013 places, 2577 transitions, 102801 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 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 14:47:28,213 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:47:28,213 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:47:28,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:47:34,424 INFO L129 PetriNetUnfolder]: 1881/5772 cut-off events. [2022-01-19 14:47:34,425 INFO L130 PetriNetUnfolder]: For 428983/429003 co-relation queries the response was YES. [2022-01-19 14:47:34,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85154 conditions, 5772 events. 1881/5772 cut-off events. For 428983/429003 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 57528 event pairs, 94 based on Foata normal form. 5/5759 useless extension candidates. Maximal degree in co-relation 84895. Up to 2608 conditions per place. [2022-01-19 14:47:34,559 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 971 selfloop transitions, 1717 changer transitions 16/2745 dead transitions. [2022-01-19 14:47:34,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1059 places, 2745 transitions, 113223 flow [2022-01-19 14:47:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-19 14:47:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-01-19 14:47:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2750 transitions. [2022-01-19 14:47:34,561 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6395348837209303 [2022-01-19 14:47:34,561 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2750 transitions. [2022-01-19 14:47:34,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2750 transitions. [2022-01-19 14:47:34,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:47:34,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2750 transitions. [2022-01-19 14:47:34,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 55.0) internal successors, (2750), 50 states have internal predecessors, (2750), 0 states have call successors, (0), 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 14:47:34,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 86.0) internal successors, (4386), 51 states have internal predecessors, (4386), 0 states have call successors, (0), 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 14:47:34,565 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 86.0) internal successors, (4386), 51 states have internal predecessors, (4386), 0 states have call successors, (0), 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 14:47:34,565 INFO L186 Difference]: Start difference. First operand has 1013 places, 2577 transitions, 102801 flow. Second operand 50 states and 2750 transitions. [2022-01-19 14:47:34,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1059 places, 2745 transitions, 113223 flow [2022-01-19 14:47:38,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1045 places, 2745 transitions, 113030 flow, removed 42 selfloop flow, removed 14 redundant places. [2022-01-19 14:47:39,069 INFO L242 Difference]: Finished difference. Result has 1060 places, 2660 transitions, 110510 flow [2022-01-19 14:47:39,071 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=102628, PETRI_DIFFERENCE_MINUEND_PLACES=996, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=911, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=110510, PETRI_PLACES=1060, PETRI_TRANSITIONS=2660} [2022-01-19 14:47:39,071 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 984 predicate places. [2022-01-19 14:47:39,071 INFO L470 AbstractCegarLoop]: Abstraction has has 1060 places, 2660 transitions, 110510 flow [2022-01-19 14:47:39,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 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 14:47:39,071 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:47:39,071 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, 1, 1] [2022-01-19 14:47:39,087 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 14:47:39,272 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 14:47:39,272 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:47:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:47:39,272 INFO L85 PathProgramCache]: Analyzing trace with hash -62303967, now seen corresponding path program 22 times [2022-01-19 14:47:39,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:47:39,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527332063] [2022-01-19 14:47:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:47:39,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:47:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:47:39,418 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 14:47:39,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:47:39,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527332063] [2022-01-19 14:47:39,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527332063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:47:39,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093899417] [2022-01-19 14:47:39,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:47:39,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:47:39,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:47:39,420 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 14:47:39,421 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 14:47:39,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:47:39,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:47:39,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:47:39,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:47:39,776 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 14:47:39,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:47:40,188 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 14:47:40,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093899417] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:47:40,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:47:40,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:47:40,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109033879] [2022-01-19 14:47:40,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:47:40,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:47:40,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:47:40,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:47:40,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:47:40,190 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:47:40,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1060 places, 2660 transitions, 110510 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 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 14:47:40,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:47:40,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:47:40,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:47:47,138 INFO L129 PetriNetUnfolder]: 1920/5911 cut-off events. [2022-01-19 14:47:47,138 INFO L130 PetriNetUnfolder]: For 477462/477482 co-relation queries the response was YES. [2022-01-19 14:47:47,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90663 conditions, 5911 events. 1920/5911 cut-off events. For 477462/477482 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 59399 event pairs, 95 based on Foata normal form. 5/5900 useless extension candidates. Maximal degree in co-relation 90392. Up to 2485 conditions per place. [2022-01-19 14:47:47,282 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 885 selfloop transitions, 1881 changer transitions 24/2831 dead transitions. [2022-01-19 14:47:47,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1114 places, 2831 transitions, 122063 flow [2022-01-19 14:47:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-19 14:47:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-01-19 14:47:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3201 transitions. [2022-01-19 14:47:47,285 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6417401764234162 [2022-01-19 14:47:47,285 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3201 transitions. [2022-01-19 14:47:47,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3201 transitions. [2022-01-19 14:47:47,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:47:47,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3201 transitions. [2022-01-19 14:47:47,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 55.189655172413794) internal successors, (3201), 58 states have internal predecessors, (3201), 0 states have call successors, (0), 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 14:47:47,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 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 14:47:47,291 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 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 14:47:47,291 INFO L186 Difference]: Start difference. First operand has 1060 places, 2660 transitions, 110510 flow. Second operand 58 states and 3201 transitions. [2022-01-19 14:47:47,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1114 places, 2831 transitions, 122063 flow [2022-01-19 14:47:52,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1099 places, 2831 transitions, 121648 flow, removed 169 selfloop flow, removed 15 redundant places. [2022-01-19 14:47:52,540 INFO L242 Difference]: Finished difference. Result has 1111 places, 2717 transitions, 117249 flow [2022-01-19 14:47:52,542 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=110113, PETRI_DIFFERENCE_MINUEND_PLACES=1042, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1825, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=117249, PETRI_PLACES=1111, PETRI_TRANSITIONS=2717} [2022-01-19 14:47:52,542 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1035 predicate places. [2022-01-19 14:47:52,542 INFO L470 AbstractCegarLoop]: Abstraction has has 1111 places, 2717 transitions, 117249 flow [2022-01-19 14:47:52,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 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 14:47:52,543 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:47:52,543 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, 1, 1] [2022-01-19 14:47:52,561 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 14:47:52,743 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 14:47:52,743 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:47:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:47:52,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1440863673, now seen corresponding path program 23 times [2022-01-19 14:47:52,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:47:52,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801965500] [2022-01-19 14:47:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:47:52,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:47:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:47:52,920 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 14:47:52,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:47:52,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801965500] [2022-01-19 14:47:52,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801965500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:47:52,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078722880] [2022-01-19 14:47:52,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:47:52,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:47:52,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:47:52,922 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 14:47:52,922 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 14:47:52,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:47:52,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:47:52,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:47:52,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:47:53,270 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 14:47:53,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:47:53,659 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 14:47:53,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078722880] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:47:53,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:47:53,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-01-19 14:47:53,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280899039] [2022-01-19 14:47:53,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:47:53,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 14:47:53,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:47:53,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 14:47:53,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-01-19 14:47:53,661 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:47:53,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1111 places, 2717 transitions, 117249 flow. Second operand has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 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 14:47:53,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:47:53,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:47:53,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:48:00,147 INFO L129 PetriNetUnfolder]: 1908/5887 cut-off events. [2022-01-19 14:48:00,147 INFO L130 PetriNetUnfolder]: For 499260/499301 co-relation queries the response was YES. [2022-01-19 14:48:00,253 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92954 conditions, 5887 events. 1908/5887 cut-off events. For 499260/499301 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 59095 event pairs, 69 based on Foata normal form. 11/5883 useless extension candidates. Maximal degree in co-relation 92673. Up to 2596 conditions per place. [2022-01-19 14:48:00,299 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1236 selfloop transitions, 1495 changer transitions 12/2784 dead transitions. [2022-01-19 14:48:00,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1143 places, 2784 transitions, 124293 flow [2022-01-19 14:48:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-19 14:48:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-01-19 14:48:00,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1973 transitions. [2022-01-19 14:48:00,300 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6372739018087855 [2022-01-19 14:48:00,300 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1973 transitions. [2022-01-19 14:48:00,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1973 transitions. [2022-01-19 14:48:00,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:48:00,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1973 transitions. [2022-01-19 14:48:00,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 54.80555555555556) internal successors, (1973), 36 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 14:48:00,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 86.0) internal successors, (3182), 37 states have internal predecessors, (3182), 0 states have call successors, (0), 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 14:48:00,303 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 86.0) internal successors, (3182), 37 states have internal predecessors, (3182), 0 states have call successors, (0), 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 14:48:00,303 INFO L186 Difference]: Start difference. First operand has 1111 places, 2717 transitions, 117249 flow. Second operand 36 states and 1973 transitions. [2022-01-19 14:48:00,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1143 places, 2784 transitions, 124293 flow [2022-01-19 14:48:05,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1104 places, 2784 transitions, 122506 flow, removed 268 selfloop flow, removed 39 redundant places. [2022-01-19 14:48:05,997 INFO L242 Difference]: Finished difference. Result has 1111 places, 2721 transitions, 120404 flow [2022-01-19 14:48:05,999 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=115479, PETRI_DIFFERENCE_MINUEND_PLACES=1069, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1489, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=120404, PETRI_PLACES=1111, PETRI_TRANSITIONS=2721} [2022-01-19 14:48:05,999 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1035 predicate places. [2022-01-19 14:48:05,999 INFO L470 AbstractCegarLoop]: Abstraction has has 1111 places, 2721 transitions, 120404 flow [2022-01-19 14:48:06,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 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 14:48:06,000 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:48:06,000 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, 1, 1] [2022-01-19 14:48:06,016 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 14:48:06,200 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 14:48:06,200 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:48:06,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:48:06,201 INFO L85 PathProgramCache]: Analyzing trace with hash -705547355, now seen corresponding path program 24 times [2022-01-19 14:48:06,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:48:06,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690850757] [2022-01-19 14:48:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:48:06,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:48:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:48:06,343 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 14:48:06,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:48:06,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690850757] [2022-01-19 14:48:06,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690850757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:48:06,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828687281] [2022-01-19 14:48:06,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:48:06,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:48:06,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:48:06,344 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 14:48:06,345 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 14:48:06,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 14:48:06,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:48:06,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 14:48:06,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:48:06,854 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 14:48:06,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:48:07,651 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 14:48:07,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828687281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:48:07,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:48:07,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 38 [2022-01-19 14:48:07,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891082355] [2022-01-19 14:48:07,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:48:07,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 14:48:07,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:48:07,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 14:48:07,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 14:48:07,653 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:48:07,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1111 places, 2721 transitions, 120404 flow. Second operand has 38 states, 38 states have (on average 52.78947368421053) internal successors, (2006), 38 states have internal predecessors, (2006), 0 states have call successors, (0), 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 14:48:07,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:48:07,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:48:07,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:48:16,479 INFO L129 PetriNetUnfolder]: 1923/6368 cut-off events. [2022-01-19 14:48:16,479 INFO L130 PetriNetUnfolder]: For 570979/570984 co-relation queries the response was YES. [2022-01-19 14:48:16,587 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98318 conditions, 6368 events. 1923/6368 cut-off events. For 570979/570984 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 66488 event pairs, 48 based on Foata normal form. 24/6372 useless extension candidates. Maximal degree in co-relation 98034. Up to 1534 conditions per place. [2022-01-19 14:48:16,636 INFO L132 encePairwiseOnDemand]: 65/86 looper letters, 923 selfloop transitions, 1972 changer transitions 57/2993 dead transitions. [2022-01-19 14:48:16,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1177 places, 2993 transitions, 135252 flow [2022-01-19 14:48:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 14:48:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 14:48:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3858 transitions. [2022-01-19 14:48:16,639 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6408637873754153 [2022-01-19 14:48:16,639 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3858 transitions. [2022-01-19 14:48:16,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3858 transitions. [2022-01-19 14:48:16,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:48:16,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3858 transitions. [2022-01-19 14:48:16,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 55.114285714285714) internal successors, (3858), 70 states have internal predecessors, (3858), 0 states have call successors, (0), 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 14:48:16,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 86.0) internal successors, (6106), 71 states have internal predecessors, (6106), 0 states have call successors, (0), 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 14:48:16,647 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 86.0) internal successors, (6106), 71 states have internal predecessors, (6106), 0 states have call successors, (0), 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 14:48:16,647 INFO L186 Difference]: Start difference. First operand has 1111 places, 2721 transitions, 120404 flow. Second operand 70 states and 3858 transitions. [2022-01-19 14:48:16,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1177 places, 2993 transitions, 135252 flow [2022-01-19 14:48:22,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1153 places, 2993 transitions, 133910 flow, removed 66 selfloop flow, removed 24 redundant places. [2022-01-19 14:48:22,430 INFO L242 Difference]: Finished difference. Result has 1181 places, 2831 transitions, 131187 flow [2022-01-19 14:48:22,432 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=119199, PETRI_DIFFERENCE_MINUEND_PLACES=1084, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1869, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=804, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=131187, PETRI_PLACES=1181, PETRI_TRANSITIONS=2831} [2022-01-19 14:48:22,432 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1105 predicate places. [2022-01-19 14:48:22,432 INFO L470 AbstractCegarLoop]: Abstraction has has 1181 places, 2831 transitions, 131187 flow [2022-01-19 14:48:22,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.78947368421053) internal successors, (2006), 38 states have internal predecessors, (2006), 0 states have call successors, (0), 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 14:48:22,433 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:48:22,433 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, 1, 1] [2022-01-19 14:48:22,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-19 14:48:22,633 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 14:48:22,633 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:48:22,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:48:22,633 INFO L85 PathProgramCache]: Analyzing trace with hash -21380387, now seen corresponding path program 25 times [2022-01-19 14:48:22,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:48:22,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470476653] [2022-01-19 14:48:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:48:22,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:48:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:48:22,790 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 14:48:22,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:48:22,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470476653] [2022-01-19 14:48:22,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470476653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:48:22,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885454520] [2022-01-19 14:48:22,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:48:22,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:48:22,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:48:22,791 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:48:22,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-19 14:48:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:48:22,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:48:22,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:48:23,133 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 14:48:23,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:48:23,479 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 14:48:23,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885454520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:48:23,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:48:23,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:48:23,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395854451] [2022-01-19 14:48:23,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:48:23,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:48:23,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:48:23,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:48:23,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:48:23,481 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:48:23,481 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1181 places, 2831 transitions, 131187 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 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 14:48:23,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:48:23,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:48:23,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:48:31,158 INFO L129 PetriNetUnfolder]: 1882/6112 cut-off events. [2022-01-19 14:48:31,158 INFO L130 PetriNetUnfolder]: For 547241/547246 co-relation queries the response was YES. [2022-01-19 14:48:31,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 100104 conditions, 6112 events. 1882/6112 cut-off events. For 547241/547246 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 62654 event pairs, 86 based on Foata normal form. 5/6079 useless extension candidates. Maximal degree in co-relation 99799. Up to 2864 conditions per place. [2022-01-19 14:48:31,323 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1256 selfloop transitions, 1658 changer transitions 6/2961 dead transitions. [2022-01-19 14:48:31,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1209 places, 2961 transitions, 141260 flow [2022-01-19 14:48:31,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-19 14:48:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-01-19 14:48:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2093 transitions. [2022-01-19 14:48:31,324 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.640452876376989 [2022-01-19 14:48:31,324 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2093 transitions. [2022-01-19 14:48:31,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2093 transitions. [2022-01-19 14:48:31,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:48:31,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2093 transitions. [2022-01-19 14:48:31,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.078947368421055) internal successors, (2093), 38 states have internal predecessors, (2093), 0 states have call successors, (0), 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 14:48:31,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 86.0) internal successors, (3354), 39 states have internal predecessors, (3354), 0 states have call successors, (0), 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 14:48:31,328 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 86.0) internal successors, (3354), 39 states have internal predecessors, (3354), 0 states have call successors, (0), 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 14:48:31,328 INFO L186 Difference]: Start difference. First operand has 1181 places, 2831 transitions, 131187 flow. Second operand 38 states and 2093 transitions. [2022-01-19 14:48:31,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1209 places, 2961 transitions, 141260 flow [2022-01-19 14:48:38,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1174 places, 2961 transitions, 137804 flow, removed 1199 selfloop flow, removed 35 redundant places. [2022-01-19 14:48:38,259 INFO L242 Difference]: Finished difference. Result has 1186 places, 2890 transitions, 134829 flow [2022-01-19 14:48:38,260 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=128524, PETRI_DIFFERENCE_MINUEND_PLACES=1137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=134829, PETRI_PLACES=1186, PETRI_TRANSITIONS=2890} [2022-01-19 14:48:38,261 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1110 predicate places. [2022-01-19 14:48:38,261 INFO L470 AbstractCegarLoop]: Abstraction has has 1186 places, 2890 transitions, 134829 flow [2022-01-19 14:48:38,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 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 14:48:38,261 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:48:38,261 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, 1, 1] [2022-01-19 14:48:38,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-19 14:48:38,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 14:48:38,464 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:48:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:48:38,465 INFO L85 PathProgramCache]: Analyzing trace with hash -332518107, now seen corresponding path program 26 times [2022-01-19 14:48:38,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:48:38,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011103974] [2022-01-19 14:48:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:48:38,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:48:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:48:38,627 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 14:48:38,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:48:38,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011103974] [2022-01-19 14:48:38,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011103974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:48:38,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133765154] [2022-01-19 14:48:38,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:48:38,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:48:38,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:48:38,628 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:48:38,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-19 14:48:38,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:48:38,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:48:38,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:48:38,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:48:39,016 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 14:48:39,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:48:39,420 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 14:48:39,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133765154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:48:39,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:48:39,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:48:39,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002796550] [2022-01-19 14:48:39,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:48:39,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:48:39,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:48:39,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:48:39,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:48:39,421 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:48:39,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1186 places, 2890 transitions, 134829 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:48:39,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:48:39,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:48:39,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:48:46,812 INFO L129 PetriNetUnfolder]: 1905/6154 cut-off events. [2022-01-19 14:48:46,812 INFO L130 PetriNetUnfolder]: For 496140/496145 co-relation queries the response was YES. [2022-01-19 14:48:46,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99584 conditions, 6154 events. 1905/6154 cut-off events. For 496140/496145 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 62839 event pairs, 82 based on Foata normal form. 5/6126 useless extension candidates. Maximal degree in co-relation 99285. Up to 2605 conditions per place. [2022-01-19 14:48:46,982 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1329 selfloop transitions, 1644 changer transitions 8/3022 dead transitions. [2022-01-19 14:48:46,982 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1220 places, 3022 transitions, 144951 flow [2022-01-19 14:48:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-19 14:48:46,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-01-19 14:48:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2098 transitions. [2022-01-19 14:48:46,984 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6419828641370869 [2022-01-19 14:48:46,984 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2098 transitions. [2022-01-19 14:48:46,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2098 transitions. [2022-01-19 14:48:46,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:48:46,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2098 transitions. [2022-01-19 14:48:46,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.21052631578947) internal successors, (2098), 38 states have internal predecessors, (2098), 0 states have call successors, (0), 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 14:48:46,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 86.0) internal successors, (3354), 39 states have internal predecessors, (3354), 0 states have call successors, (0), 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 14:48:46,989 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 86.0) internal successors, (3354), 39 states have internal predecessors, (3354), 0 states have call successors, (0), 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 14:48:46,989 INFO L186 Difference]: Start difference. First operand has 1186 places, 2890 transitions, 134829 flow. Second operand 38 states and 2098 transitions. [2022-01-19 14:48:46,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1220 places, 3022 transitions, 144951 flow [2022-01-19 14:48:52,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1207 places, 3022 transitions, 144723 flow, removed 53 selfloop flow, removed 13 redundant places. [2022-01-19 14:48:52,868 INFO L242 Difference]: Finished difference. Result has 1218 places, 2939 transitions, 143313 flow [2022-01-19 14:48:52,870 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=134625, PETRI_DIFFERENCE_MINUEND_PLACES=1170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=143313, PETRI_PLACES=1218, PETRI_TRANSITIONS=2939} [2022-01-19 14:48:52,871 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1142 predicate places. [2022-01-19 14:48:52,871 INFO L470 AbstractCegarLoop]: Abstraction has has 1218 places, 2939 transitions, 143313 flow [2022-01-19 14:48:52,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:48:52,871 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:48:52,871 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, 1, 1] [2022-01-19 14:48:52,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-19 14:48:53,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-19 14:48:53,073 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:48:53,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:48:53,073 INFO L85 PathProgramCache]: Analyzing trace with hash 29545351, now seen corresponding path program 27 times [2022-01-19 14:48:53,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:48:53,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032889760] [2022-01-19 14:48:53,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:48:53,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:48:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:48:53,243 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 14:48:53,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:48:53,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032889760] [2022-01-19 14:48:53,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032889760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:48:53,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445942538] [2022-01-19 14:48:53,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:48:53,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:48:53,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:48:53,244 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:48:53,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-19 14:48:53,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 14:48:53,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:48:53,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:48:53,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:48:53,616 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 14:48:53,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:48:54,004 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 14:48:54,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445942538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:48:54,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:48:54,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:48:54,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654206140] [2022-01-19 14:48:54,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:48:54,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:48:54,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:48:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:48:54,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:48:54,006 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:48:54,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1218 places, 2939 transitions, 143313 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:48:54,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:48:54,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:48:54,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:49:03,217 INFO L129 PetriNetUnfolder]: 1947/6238 cut-off events. [2022-01-19 14:49:03,218 INFO L130 PetriNetUnfolder]: For 562151/562156 co-relation queries the response was YES. [2022-01-19 14:49:03,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105610 conditions, 6238 events. 1947/6238 cut-off events. For 562151/562156 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 63829 event pairs, 75 based on Foata normal form. 5/6211 useless extension candidates. Maximal degree in co-relation 105303. Up to 2610 conditions per place. [2022-01-19 14:49:03,385 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1388 selfloop transitions, 1660 changer transitions 8/3097 dead transitions. [2022-01-19 14:49:03,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1259 places, 3097 transitions, 155526 flow [2022-01-19 14:49:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-19 14:49:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-01-19 14:49:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2511 transitions. [2022-01-19 14:49:03,387 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.634732052578362 [2022-01-19 14:49:03,387 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2511 transitions. [2022-01-19 14:49:03,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2511 transitions. [2022-01-19 14:49:03,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:49:03,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2511 transitions. [2022-01-19 14:49:03,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.58695652173913) internal successors, (2511), 46 states have internal predecessors, (2511), 0 states have call successors, (0), 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 14:49:03,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 86.0) internal successors, (4042), 47 states have internal predecessors, (4042), 0 states have call successors, (0), 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 14:49:03,390 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 86.0) internal successors, (4042), 47 states have internal predecessors, (4042), 0 states have call successors, (0), 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 14:49:03,390 INFO L186 Difference]: Start difference. First operand has 1218 places, 2939 transitions, 143313 flow. Second operand 46 states and 2511 transitions. [2022-01-19 14:49:03,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1259 places, 3097 transitions, 155526 flow [2022-01-19 14:49:10,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1236 places, 3097 transitions, 155182 flow, removed 38 selfloop flow, removed 23 redundant places. [2022-01-19 14:49:10,188 INFO L242 Difference]: Finished difference. Result has 1243 places, 2984 transitions, 149249 flow [2022-01-19 14:49:10,190 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142989, PETRI_DIFFERENCE_MINUEND_PLACES=1191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=149249, PETRI_PLACES=1243, PETRI_TRANSITIONS=2984} [2022-01-19 14:49:10,191 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1167 predicate places. [2022-01-19 14:49:10,191 INFO L470 AbstractCegarLoop]: Abstraction has has 1243 places, 2984 transitions, 149249 flow [2022-01-19 14:49:10,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:49:10,191 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:49:10,192 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, 1, 1] [2022-01-19 14:49:10,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-19 14:49:10,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:49:10,407 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:49:10,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:49:10,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2111950715, now seen corresponding path program 28 times [2022-01-19 14:49:10,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:49:10,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007740486] [2022-01-19 14:49:10,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:49:10,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:49:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:49:10,594 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 14:49:10,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:49:10,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007740486] [2022-01-19 14:49:10,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007740486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:49:10,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176778621] [2022-01-19 14:49:10,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:49:10,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:49:10,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:49:10,596 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:49:10,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-19 14:49:10,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:49:10,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:49:10,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:49:10,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:49:10,961 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 14:49:10,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:49:11,331 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 14:49:11,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176778621] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:49:11,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:49:11,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:49:11,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937489259] [2022-01-19 14:49:11,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:49:11,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:49:11,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:49:11,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:49:11,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:49:11,333 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:49:11,334 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1243 places, 2984 transitions, 149249 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 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 14:49:11,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:49:11,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:49:11,334 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:49:22,840 INFO L129 PetriNetUnfolder]: 2363/7511 cut-off events. [2022-01-19 14:49:22,840 INFO L130 PetriNetUnfolder]: For 696871/696876 co-relation queries the response was YES. [2022-01-19 14:49:22,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129523 conditions, 7511 events. 2363/7511 cut-off events. For 696871/696876 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 79655 event pairs, 105 based on Foata normal form. 9/7481 useless extension candidates. Maximal degree in co-relation 129213. Up to 3124 conditions per place. [2022-01-19 14:49:23,123 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1499 selfloop transitions, 2269 changer transitions 20/3829 dead transitions. [2022-01-19 14:49:23,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1327 places, 3829 transitions, 193509 flow [2022-01-19 14:49:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-19 14:49:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-01-19 14:49:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4786 transitions. [2022-01-19 14:49:23,126 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.632399577167019 [2022-01-19 14:49:23,126 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4786 transitions. [2022-01-19 14:49:23,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4786 transitions. [2022-01-19 14:49:23,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:49:23,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4786 transitions. [2022-01-19 14:49:23,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 54.38636363636363) internal successors, (4786), 88 states have internal predecessors, (4786), 0 states have call successors, (0), 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 14:49:23,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 86.0) internal successors, (7654), 89 states have internal predecessors, (7654), 0 states have call successors, (0), 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 14:49:23,132 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 86.0) internal successors, (7654), 89 states have internal predecessors, (7654), 0 states have call successors, (0), 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 14:49:23,133 INFO L186 Difference]: Start difference. First operand has 1243 places, 2984 transitions, 149249 flow. Second operand 88 states and 4786 transitions. [2022-01-19 14:49:23,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1327 places, 3829 transitions, 193509 flow [2022-01-19 14:49:31,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1305 places, 3829 transitions, 191658 flow, removed 35 selfloop flow, removed 22 redundant places. [2022-01-19 14:49:32,017 INFO L242 Difference]: Finished difference. Result has 1345 places, 3625 transitions, 188775 flow [2022-01-19 14:49:32,020 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=147722, PETRI_DIFFERENCE_MINUEND_PLACES=1218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=188775, PETRI_PLACES=1345, PETRI_TRANSITIONS=3625} [2022-01-19 14:49:32,020 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1269 predicate places. [2022-01-19 14:49:32,020 INFO L470 AbstractCegarLoop]: Abstraction has has 1345 places, 3625 transitions, 188775 flow [2022-01-19 14:49:32,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 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 14:49:32,020 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:49:32,020 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, 1, 1] [2022-01-19 14:49:32,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-19 14:49:32,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:49:32,236 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:49:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:49:32,237 INFO L85 PathProgramCache]: Analyzing trace with hash 748254819, now seen corresponding path program 29 times [2022-01-19 14:49:32,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:49:32,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389966172] [2022-01-19 14:49:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:49:32,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:49:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:49:32,398 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 14:49:32,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:49:32,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389966172] [2022-01-19 14:49:32,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389966172] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:49:32,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147576458] [2022-01-19 14:49:32,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:49:32,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:49:32,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:49:32,416 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:49:32,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-19 14:49:32,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 14:49:32,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:49:32,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:49:32,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:49:32,887 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 14:49:32,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:49:33,318 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 14:49:33,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147576458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:49:33,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:49:33,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-01-19 14:49:33,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196728489] [2022-01-19 14:49:33,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:49:33,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 14:49:33,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:49:33,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 14:49:33,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-01-19 14:49:33,320 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:49:33,321 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1345 places, 3625 transitions, 188775 flow. Second operand has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 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 14:49:33,321 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:49:33,321 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:49:33,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:49:47,904 INFO L129 PetriNetUnfolder]: 2863/8963 cut-off events. [2022-01-19 14:49:47,904 INFO L130 PetriNetUnfolder]: For 905620/905625 co-relation queries the response was YES. [2022-01-19 14:49:48,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161023 conditions, 8963 events. 2863/8963 cut-off events. For 905620/905625 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 98169 event pairs, 94 based on Foata normal form. 52/8982 useless extension candidates. Maximal degree in co-relation 160679. Up to 3763 conditions per place. [2022-01-19 14:49:48,184 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 2025 selfloop transitions, 2407 changer transitions 58/4531 dead transitions. [2022-01-19 14:49:48,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1398 places, 4531 transitions, 241608 flow [2022-01-19 14:49:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-19 14:49:48,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-01-19 14:49:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3446 transitions. [2022-01-19 14:49:48,186 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6360280546327058 [2022-01-19 14:49:48,186 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3446 transitions. [2022-01-19 14:49:48,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3446 transitions. [2022-01-19 14:49:48,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:49:48,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3446 transitions. [2022-01-19 14:49:48,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 54.698412698412696) internal successors, (3446), 63 states have internal predecessors, (3446), 0 states have call successors, (0), 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 14:49:48,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 86.0) internal successors, (5504), 64 states have internal predecessors, (5504), 0 states have call successors, (0), 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 14:49:48,191 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 86.0) internal successors, (5504), 64 states have internal predecessors, (5504), 0 states have call successors, (0), 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 14:49:48,191 INFO L186 Difference]: Start difference. First operand has 1345 places, 3625 transitions, 188775 flow. Second operand 63 states and 3446 transitions. [2022-01-19 14:49:48,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1398 places, 4531 transitions, 241608 flow [2022-01-19 14:50:01,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1375 places, 4531 transitions, 239482 flow, removed 1026 selfloop flow, removed 23 redundant places. [2022-01-19 14:50:01,681 INFO L242 Difference]: Finished difference. Result has 1422 places, 4286 transitions, 232869 flow [2022-01-19 14:50:01,683 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=187585, PETRI_DIFFERENCE_MINUEND_PLACES=1313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1806, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=232869, PETRI_PLACES=1422, PETRI_TRANSITIONS=4286} [2022-01-19 14:50:01,684 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1346 predicate places. [2022-01-19 14:50:01,684 INFO L470 AbstractCegarLoop]: Abstraction has has 1422 places, 4286 transitions, 232869 flow [2022-01-19 14:50:01,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 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 14:50:01,685 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:50:01,685 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, 1, 1] [2022-01-19 14:50:01,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-19 14:50:01,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-19 14:50:01,905 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:50:01,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:50:01,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1229955019, now seen corresponding path program 30 times [2022-01-19 14:50:01,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:50:01,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654532171] [2022-01-19 14:50:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:50:01,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:50:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:50:02,067 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 14:50:02,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:50:02,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654532171] [2022-01-19 14:50:02,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654532171] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:50:02,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187964231] [2022-01-19 14:50:02,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:50:02,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:50:02,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:50:02,072 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:50:02,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-19 14:50:02,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 14:50:02,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:50:02,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:50:02,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:50:02,469 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 14:50:02,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:50:02,877 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 14:50:02,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187964231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:50:02,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:50:02,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:50:02,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748955910] [2022-01-19 14:50:02,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:50:02,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:50:02,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:50:02,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:50:02,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:50:02,879 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:50:02,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1422 places, 4286 transitions, 232869 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:50:02,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:50:02,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:50:02,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:50:19,868 INFO L129 PetriNetUnfolder]: 2849/8783 cut-off events. [2022-01-19 14:50:19,869 INFO L130 PetriNetUnfolder]: For 980310/980325 co-relation queries the response was YES. [2022-01-19 14:50:20,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165488 conditions, 8783 events. 2849/8783 cut-off events. For 980310/980325 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 94888 event pairs, 97 based on Foata normal form. 25/8780 useless extension candidates. Maximal degree in co-relation 165108. Up to 2947 conditions per place. [2022-01-19 14:50:20,179 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1641 selfloop transitions, 2710 changer transitions 42/4434 dead transitions. [2022-01-19 14:50:20,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1475 places, 4434 transitions, 245883 flow [2022-01-19 14:50:20,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-19 14:50:20,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-01-19 14:50:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4047 transitions. [2022-01-19 14:50:20,181 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6359208045254557 [2022-01-19 14:50:20,181 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4047 transitions. [2022-01-19 14:50:20,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4047 transitions. [2022-01-19 14:50:20,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:50:20,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4047 transitions. [2022-01-19 14:50:20,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 54.689189189189186) internal successors, (4047), 74 states have internal predecessors, (4047), 0 states have call successors, (0), 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 14:50:20,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 86.0) internal successors, (6450), 75 states have internal predecessors, (6450), 0 states have call successors, (0), 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 14:50:20,187 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 86.0) internal successors, (6450), 75 states have internal predecessors, (6450), 0 states have call successors, (0), 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 14:50:20,187 INFO L186 Difference]: Start difference. First operand has 1422 places, 4286 transitions, 232869 flow. Second operand 74 states and 4047 transitions. [2022-01-19 14:50:20,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1475 places, 4434 transitions, 245883 flow [2022-01-19 14:50:34,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1452 places, 4434 transitions, 244885 flow, removed 474 selfloop flow, removed 23 redundant places. [2022-01-19 14:50:35,060 INFO L242 Difference]: Finished difference. Result has 1459 places, 4265 transitions, 236679 flow [2022-01-19 14:50:35,063 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=230168, PETRI_DIFFERENCE_MINUEND_PLACES=1379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=236679, PETRI_PLACES=1459, PETRI_TRANSITIONS=4265} [2022-01-19 14:50:35,063 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1383 predicate places. [2022-01-19 14:50:35,064 INFO L470 AbstractCegarLoop]: Abstraction has has 1459 places, 4265 transitions, 236679 flow [2022-01-19 14:50:35,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:50:35,064 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:50:35,064 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, 1, 1] [2022-01-19 14:50:35,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-19 14:50:35,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:50:35,283 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:50:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:50:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash -472880727, now seen corresponding path program 31 times [2022-01-19 14:50:35,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:50:35,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187673490] [2022-01-19 14:50:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:50:35,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:50:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:50:35,471 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 14:50:35,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:50:35,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187673490] [2022-01-19 14:50:35,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187673490] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:50:35,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054755725] [2022-01-19 14:50:35,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:50:35,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:50:35,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:50:35,473 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:50:35,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-19 14:50:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:50:35,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:50:35,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:50:35,844 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 14:50:35,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:50:36,272 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 14:50:36,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054755725] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:50:36,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:50:36,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-01-19 14:50:36,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690066823] [2022-01-19 14:50:36,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:50:36,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 14:50:36,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:50:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 14:50:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-01-19 14:50:36,274 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:50:36,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1459 places, 4265 transitions, 236679 flow. Second operand has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 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 14:50:36,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:50:36,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:50:36,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:50:51,780 INFO L129 PetriNetUnfolder]: 2926/8865 cut-off events. [2022-01-19 14:50:51,781 INFO L130 PetriNetUnfolder]: For 1020880/1020895 co-relation queries the response was YES. [2022-01-19 14:50:52,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 173645 conditions, 8865 events. 2926/8865 cut-off events. For 1020880/1020895 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 95173 event pairs, 116 based on Foata normal form. 10/8837 useless extension candidates. Maximal degree in co-relation 173274. Up to 4283 conditions per place. [2022-01-19 14:50:52,113 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1926 selfloop transitions, 2562 changer transitions 8/4537 dead transitions. [2022-01-19 14:50:52,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1475 places, 4537 transitions, 258413 flow [2022-01-19 14:50:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-19 14:50:52,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-01-19 14:50:52,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1555 transitions. [2022-01-19 14:50:52,115 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.645764119601329 [2022-01-19 14:50:52,115 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1555 transitions. [2022-01-19 14:50:52,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1555 transitions. [2022-01-19 14:50:52,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:50:52,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1555 transitions. [2022-01-19 14:50:52,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.535714285714285) internal successors, (1555), 28 states have internal predecessors, (1555), 0 states have call successors, (0), 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 14:50:52,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 86.0) internal successors, (2494), 29 states have internal predecessors, (2494), 0 states have call successors, (0), 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 14:50:52,117 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 86.0) internal successors, (2494), 29 states have internal predecessors, (2494), 0 states have call successors, (0), 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 14:50:52,117 INFO L186 Difference]: Start difference. First operand has 1459 places, 4265 transitions, 236679 flow. Second operand 28 states and 1555 transitions. [2022-01-19 14:50:52,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1475 places, 4537 transitions, 258413 flow [2022-01-19 14:51:08,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1434 places, 4537 transitions, 255511 flow, removed 177 selfloop flow, removed 41 redundant places. [2022-01-19 14:51:08,562 INFO L242 Difference]: Finished difference. Result has 1452 places, 4431 transitions, 254396 flow [2022-01-19 14:51:08,565 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=233947, PETRI_DIFFERENCE_MINUEND_PLACES=1407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1788, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=254396, PETRI_PLACES=1452, PETRI_TRANSITIONS=4431} [2022-01-19 14:51:08,565 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1376 predicate places. [2022-01-19 14:51:08,565 INFO L470 AbstractCegarLoop]: Abstraction has has 1452 places, 4431 transitions, 254396 flow [2022-01-19 14:51:08,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 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 14:51:08,565 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:51:08,566 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, 1, 1] [2022-01-19 14:51:08,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-19 14:51:08,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:51:08,767 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:51:08,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:51:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash 957402633, now seen corresponding path program 32 times [2022-01-19 14:51:08,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:51:08,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679632035] [2022-01-19 14:51:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:51:08,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:51:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:51:08,924 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 14:51:08,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:51:08,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679632035] [2022-01-19 14:51:08,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679632035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:51:08,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991023434] [2022-01-19 14:51:08,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:51:08,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:51:08,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:51:08,925 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:51:08,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-19 14:51:08,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:51:08,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:51:08,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:51:08,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:51:09,275 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 14:51:09,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:51:09,629 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 14:51:09,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991023434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:51:09,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:51:09,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:51:09,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378851992] [2022-01-19 14:51:09,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:51:09,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:51:09,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:51:09,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:51:09,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:51:09,631 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:51:09,631 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1452 places, 4431 transitions, 254396 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 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 14:51:09,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:51:09,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:51:09,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:51:27,530 INFO L129 PetriNetUnfolder]: 2948/8894 cut-off events. [2022-01-19 14:51:27,530 INFO L130 PetriNetUnfolder]: For 1090197/1090212 co-relation queries the response was YES. [2022-01-19 14:51:27,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 179089 conditions, 8894 events. 2948/8894 cut-off events. For 1090197/1090212 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 95280 event pairs, 114 based on Foata normal form. 9/8865 useless extension candidates. Maximal degree in co-relation 178708. Up to 4141 conditions per place. [2022-01-19 14:51:27,846 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1868 selfloop transitions, 2617 changer transitions 6/4532 dead transitions. [2022-01-19 14:51:27,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1482 places, 4532 transitions, 266431 flow [2022-01-19 14:51:27,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-19 14:51:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-01-19 14:51:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1932 transitions. [2022-01-19 14:51:27,847 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.641860465116279 [2022-01-19 14:51:27,847 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1932 transitions. [2022-01-19 14:51:27,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1932 transitions. [2022-01-19 14:51:27,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:51:27,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1932 transitions. [2022-01-19 14:51:27,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.2) internal successors, (1932), 35 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 14:51:27,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 86.0) internal successors, (3096), 36 states have internal predecessors, (3096), 0 states have call successors, (0), 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 14:51:27,850 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 86.0) internal successors, (3096), 36 states have internal predecessors, (3096), 0 states have call successors, (0), 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 14:51:27,850 INFO L186 Difference]: Start difference. First operand has 1452 places, 4431 transitions, 254396 flow. Second operand 35 states and 1932 transitions. [2022-01-19 14:51:27,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1482 places, 4532 transitions, 266431 flow [2022-01-19 14:51:44,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1467 places, 4532 transitions, 266301 flow, removed 27 selfloop flow, removed 15 redundant places. [2022-01-19 14:51:44,903 INFO L242 Difference]: Finished difference. Result has 1478 places, 4462 transitions, 265169 flow [2022-01-19 14:51:44,906 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=254282, PETRI_DIFFERENCE_MINUEND_PLACES=1433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=265169, PETRI_PLACES=1478, PETRI_TRANSITIONS=4462} [2022-01-19 14:51:44,906 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1402 predicate places. [2022-01-19 14:51:44,906 INFO L470 AbstractCegarLoop]: Abstraction has has 1478 places, 4462 transitions, 265169 flow [2022-01-19 14:51:44,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 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 14:51:44,906 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:51:44,906 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, 1, 1] [2022-01-19 14:51:44,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-19 14:51:45,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-19 14:51:45,107 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:51:45,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:51:45,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1583815767, now seen corresponding path program 33 times [2022-01-19 14:51:45,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:51:45,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590840965] [2022-01-19 14:51:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:51:45,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:51:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:51:45,251 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 14:51:45,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:51:45,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590840965] [2022-01-19 14:51:45,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590840965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:51:45,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537179661] [2022-01-19 14:51:45,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:51:45,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:51:45,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:51:45,252 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:51:45,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-19 14:51:45,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 14:51:45,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:51:45,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:51:45,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:51:45,644 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 14:51:45,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:51:46,009 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 14:51:46,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537179661] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:51:46,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:51:46,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:51:46,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973774567] [2022-01-19 14:51:46,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:51:46,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:51:46,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:51:46,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:51:46,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:51:46,011 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:51:46,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1478 places, 4462 transitions, 265169 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 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 14:51:46,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:51:46,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:51:46,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:52:10,829 INFO L129 PetriNetUnfolder]: 3358/10096 cut-off events. [2022-01-19 14:52:10,829 INFO L130 PetriNetUnfolder]: For 1355762/1355777 co-relation queries the response was YES. [2022-01-19 14:52:11,083 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208784 conditions, 10096 events. 3358/10096 cut-off events. For 1355762/1355777 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 110823 event pairs, 95 based on Foata normal form. 14/10070 useless extension candidates. Maximal degree in co-relation 208396. Up to 3256 conditions per place. [2022-01-19 14:52:11,182 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1760 selfloop transitions, 3488 changer transitions 16/5305 dead transitions. [2022-01-19 14:52:11,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1545 places, 5305 transitions, 318813 flow [2022-01-19 14:52:11,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-19 14:52:11,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-01-19 14:52:11,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3867 transitions. [2022-01-19 14:52:11,184 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6333114968883066 [2022-01-19 14:52:11,184 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3867 transitions. [2022-01-19 14:52:11,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3867 transitions. [2022-01-19 14:52:11,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:52:11,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3867 transitions. [2022-01-19 14:52:11,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 54.46478873239437) internal successors, (3867), 71 states have internal predecessors, (3867), 0 states have call successors, (0), 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 14:52:11,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 86.0) internal successors, (6192), 72 states have internal predecessors, (6192), 0 states have call successors, (0), 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 14:52:11,190 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 86.0) internal successors, (6192), 72 states have internal predecessors, (6192), 0 states have call successors, (0), 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 14:52:11,190 INFO L186 Difference]: Start difference. First operand has 1478 places, 4462 transitions, 265169 flow. Second operand 71 states and 3867 transitions. [2022-01-19 14:52:11,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1545 places, 5305 transitions, 318813 flow [2022-01-19 14:52:32,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1536 places, 5305 transitions, 318719 flow, removed 31 selfloop flow, removed 9 redundant places. [2022-01-19 14:52:32,832 INFO L242 Difference]: Finished difference. Result has 1564 places, 5094 transitions, 312370 flow [2022-01-19 14:52:32,834 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=265099, PETRI_DIFFERENCE_MINUEND_PLACES=1466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2892, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=312370, PETRI_PLACES=1564, PETRI_TRANSITIONS=5094} [2022-01-19 14:52:32,835 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1488 predicate places. [2022-01-19 14:52:32,835 INFO L470 AbstractCegarLoop]: Abstraction has has 1564 places, 5094 transitions, 312370 flow [2022-01-19 14:52:32,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 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 14:52:32,835 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:52:32,835 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, 1, 1] [2022-01-19 14:52:32,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-19 14:52:33,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-19 14:52:33,036 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:52:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:52:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1996243731, now seen corresponding path program 34 times [2022-01-19 14:52:33,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:52:33,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138787677] [2022-01-19 14:52:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:52:33,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:52:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:52:33,196 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 14:52:33,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:52:33,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138787677] [2022-01-19 14:52:33,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138787677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:52:33,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351522511] [2022-01-19 14:52:33,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:52:33,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:52:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:52:33,198 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:52:33,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-19 14:52:33,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:52:33,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:52:33,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:52:33,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:52:33,590 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 14:52:33,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:52:34,060 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 14:52:34,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351522511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:52:34,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:52:34,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-01-19 14:52:34,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743051797] [2022-01-19 14:52:34,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:52:34,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 14:52:34,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:52:34,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 14:52:34,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-01-19 14:52:34,062 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:52:34,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1564 places, 5094 transitions, 312370 flow. Second operand has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 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 14:52:34,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:52:34,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:52:34,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:53:04,549 INFO L129 PetriNetUnfolder]: 3696/10947 cut-off events. [2022-01-19 14:53:04,549 INFO L130 PetriNetUnfolder]: For 1622829/1622844 co-relation queries the response was YES. [2022-01-19 14:53:04,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237262 conditions, 10947 events. 3696/10947 cut-off events. For 1622829/1622844 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 121071 event pairs, 129 based on Foata normal form. 53/10969 useless extension candidates. Maximal degree in co-relation 236849. Up to 4275 conditions per place. [2022-01-19 14:53:05,022 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 2364 selfloop transitions, 3351 changer transitions 52/5808 dead transitions. [2022-01-19 14:53:05,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1618 places, 5808 transitions, 363443 flow [2022-01-19 14:53:05,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-19 14:53:05,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-01-19 14:53:05,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3323 transitions. [2022-01-19 14:53:05,024 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6334349980937858 [2022-01-19 14:53:05,024 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3323 transitions. [2022-01-19 14:53:05,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3323 transitions. [2022-01-19 14:53:05,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:53:05,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3323 transitions. [2022-01-19 14:53:05,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.47540983606557) internal successors, (3323), 61 states have internal predecessors, (3323), 0 states have call successors, (0), 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 14:53:05,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 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 14:53:05,029 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 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 14:53:05,029 INFO L186 Difference]: Start difference. First operand has 1564 places, 5094 transitions, 312370 flow. Second operand 61 states and 3323 transitions. [2022-01-19 14:53:05,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1618 places, 5808 transitions, 363443 flow [2022-01-19 14:53:33,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1590 places, 5808 transitions, 360844 flow, removed 989 selfloop flow, removed 28 redundant places. [2022-01-19 14:53:33,921 INFO L242 Difference]: Finished difference. Result has 1627 places, 5595 transitions, 355001 flow [2022-01-19 14:53:33,924 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=306492, PETRI_DIFFERENCE_MINUEND_PLACES=1530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2813, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=355001, PETRI_PLACES=1627, PETRI_TRANSITIONS=5595} [2022-01-19 14:53:33,924 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1551 predicate places. [2022-01-19 14:53:33,924 INFO L470 AbstractCegarLoop]: Abstraction has has 1627 places, 5595 transitions, 355001 flow [2022-01-19 14:53:33,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 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 14:53:33,925 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:53:33,951 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, 1, 1] [2022-01-19 14:53:33,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-19 14:53:34,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-19 14:53:34,152 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:53:34,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:53:34,152 INFO L85 PathProgramCache]: Analyzing trace with hash -392691941, now seen corresponding path program 35 times [2022-01-19 14:53:34,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:53:34,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623864867] [2022-01-19 14:53:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:53:34,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:53:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:53:34,305 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 14:53:34,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:53:34,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623864867] [2022-01-19 14:53:34,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623864867] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:53:34,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882936264] [2022-01-19 14:53:34,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:53:34,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:53:34,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:53:34,306 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:53:34,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-19 14:53:34,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:53:34,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:53:34,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:53:34,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:53:34,711 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 14:53:34,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:53:35,082 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 14:53:35,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882936264] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:53:35,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:53:35,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:53:35,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542264185] [2022-01-19 14:53:35,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:53:35,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:53:35,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:53:35,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:53:35,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:53:35,088 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:53:35,089 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1627 places, 5595 transitions, 355001 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:53:35,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:53:35,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:53:35,089 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:54:10,284 INFO L129 PetriNetUnfolder]: 3856/11389 cut-off events. [2022-01-19 14:54:10,284 INFO L130 PetriNetUnfolder]: For 1830241/1830256 co-relation queries the response was YES. [2022-01-19 14:54:10,627 INFO L84 FinitePrefix]: Finished finitePrefix Result has 254212 conditions, 11389 events. 3856/11389 cut-off events. For 1830241/1830256 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 126119 event pairs, 105 based on Foata normal form. 24/11383 useless extension candidates. Maximal degree in co-relation 253772. Up to 3899 conditions per place. [2022-01-19 14:54:10,757 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 2429 selfloop transitions, 3563 changer transitions 25/6058 dead transitions. [2022-01-19 14:54:10,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1705 places, 6058 transitions, 392645 flow [2022-01-19 14:54:10,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-19 14:54:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-01-19 14:54:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4785 transitions. [2022-01-19 14:54:10,760 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6322674418604651 [2022-01-19 14:54:10,760 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4785 transitions. [2022-01-19 14:54:10,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4785 transitions. [2022-01-19 14:54:10,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:54:10,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4785 transitions. [2022-01-19 14:54:10,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 54.375) internal successors, (4785), 88 states have internal predecessors, (4785), 0 states have call successors, (0), 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 14:54:10,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 86.0) internal successors, (7654), 89 states have internal predecessors, (7654), 0 states have call successors, (0), 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 14:54:10,767 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 86.0) internal successors, (7654), 89 states have internal predecessors, (7654), 0 states have call successors, (0), 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 14:54:10,767 INFO L186 Difference]: Start difference. First operand has 1627 places, 5595 transitions, 355001 flow. Second operand 88 states and 4785 transitions. [2022-01-19 14:54:10,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1705 places, 6058 transitions, 392645 flow [2022-01-19 14:54:45,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1688 places, 6058 transitions, 391002 flow, removed 742 selfloop flow, removed 17 redundant places. [2022-01-19 14:54:45,628 INFO L242 Difference]: Finished difference. Result has 1713 places, 5822 transitions, 381117 flow [2022-01-19 14:54:45,631 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=352115, PETRI_DIFFERENCE_MINUEND_PLACES=1601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=381117, PETRI_PLACES=1713, PETRI_TRANSITIONS=5822} [2022-01-19 14:54:45,631 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1637 predicate places. [2022-01-19 14:54:45,631 INFO L470 AbstractCegarLoop]: Abstraction has has 1713 places, 5822 transitions, 381117 flow [2022-01-19 14:54:45,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:54:45,631 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:54:45,631 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, 1, 1] [2022-01-19 14:54:45,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-19 14:54:45,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:54:45,832 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:54:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:54:45,832 INFO L85 PathProgramCache]: Analyzing trace with hash 505823423, now seen corresponding path program 36 times [2022-01-19 14:54:45,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:54:45,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412887011] [2022-01-19 14:54:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:54:45,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:54:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:54:45,986 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 14:54:45,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:54:45,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412887011] [2022-01-19 14:54:45,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412887011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:54:45,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051618842] [2022-01-19 14:54:45,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:54:45,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:54:45,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:54:45,987 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:54:45,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-19 14:54:46,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 14:54:46,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:54:46,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:54:46,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:54:46,404 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 14:54:46,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:54:46,782 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 14:54:46,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051618842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:54:46,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:54:46,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:54:46,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101014598] [2022-01-19 14:54:46,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:54:46,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:54:46,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:54:46,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:54:46,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:54:46,784 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:54:46,784 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1713 places, 5822 transitions, 381117 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:54:46,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:54:46,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:54:46,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:55:25,902 INFO L129 PetriNetUnfolder]: 3970/11753 cut-off events. [2022-01-19 14:55:25,902 INFO L130 PetriNetUnfolder]: For 2001386/2001401 co-relation queries the response was YES. [2022-01-19 14:55:26,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 268394 conditions, 11753 events. 3970/11753 cut-off events. For 2001386/2001401 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 130915 event pairs, 140 based on Foata normal form. 11/11736 useless extension candidates. Maximal degree in co-relation 267936. Up to 4537 conditions per place. [2022-01-19 14:55:26,476 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 2593 selfloop transitions, 3490 changer transitions 14/6138 dead transitions. [2022-01-19 14:55:26,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1771 places, 6138 transitions, 409460 flow [2022-01-19 14:55:26,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-19 14:55:26,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-01-19 14:55:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3660 transitions. [2022-01-19 14:55:26,479 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6351961124609511 [2022-01-19 14:55:26,479 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3660 transitions. [2022-01-19 14:55:26,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3660 transitions. [2022-01-19 14:55:26,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:55:26,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3660 transitions. [2022-01-19 14:55:26,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 54.62686567164179) internal successors, (3660), 67 states have internal predecessors, (3660), 0 states have call successors, (0), 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 14:55:26,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 86.0) internal successors, (5848), 68 states have internal predecessors, (5848), 0 states have call successors, (0), 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 14:55:26,484 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 86.0) internal successors, (5848), 68 states have internal predecessors, (5848), 0 states have call successors, (0), 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 14:55:26,484 INFO L186 Difference]: Start difference. First operand has 1713 places, 5822 transitions, 381117 flow. Second operand 67 states and 3660 transitions. [2022-01-19 14:55:26,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1771 places, 6138 transitions, 409460 flow [2022-01-19 14:56:04,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1740 places, 6138 transitions, 407647 flow, removed 456 selfloop flow, removed 31 redundant places. [2022-01-19 14:56:04,871 INFO L242 Difference]: Finished difference. Result has 1758 places, 5967 transitions, 401737 flow [2022-01-19 14:56:04,874 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=379348, PETRI_DIFFERENCE_MINUEND_PLACES=1674, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=401737, PETRI_PLACES=1758, PETRI_TRANSITIONS=5967} [2022-01-19 14:56:04,874 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1682 predicate places. [2022-01-19 14:56:04,874 INFO L470 AbstractCegarLoop]: Abstraction has has 1758 places, 5967 transitions, 401737 flow [2022-01-19 14:56:04,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 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 14:56:04,875 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:56:04,875 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, 1, 1] [2022-01-19 14:56:04,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-19 14:56:05,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-19 14:56:05,091 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:56:05,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:56:05,091 INFO L85 PathProgramCache]: Analyzing trace with hash 789417423, now seen corresponding path program 37 times [2022-01-19 14:56:05,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:56:05,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075380156] [2022-01-19 14:56:05,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:56:05,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:56:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:56:05,258 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 14:56:05,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:56:05,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075380156] [2022-01-19 14:56:05,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075380156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:56:05,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673315720] [2022-01-19 14:56:05,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:56:05,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:56:05,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:56:05,259 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:56:05,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-19 14:56:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:56:05,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:56:05,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:56:05,666 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 14:56:05,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:56:06,040 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 14:56:06,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673315720] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:56:06,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:56:06,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 14:56:06,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639988912] [2022-01-19 14:56:06,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:56:06,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 14:56:06,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:56:06,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 14:56:06,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-01-19 14:56:06,042 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:56:06,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1758 places, 5967 transitions, 401737 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 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 14:56:06,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:56:06,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:56:06,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:56:53,476 INFO L129 PetriNetUnfolder]: 4229/12588 cut-off events. [2022-01-19 14:56:53,476 INFO L130 PetriNetUnfolder]: For 2299943/2299958 co-relation queries the response was YES. [2022-01-19 14:56:53,985 INFO L84 FinitePrefix]: Finished finitePrefix Result has 293572 conditions, 12588 events. 4229/12588 cut-off events. For 2299943/2299958 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 142662 event pairs, 160 based on Foata normal form. 11/12564 useless extension candidates. Maximal degree in co-relation 293106. Up to 6400 conditions per place. [2022-01-19 14:56:54,138 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 2941 selfloop transitions, 3511 changer transitions 30/6523 dead transitions. [2022-01-19 14:56:54,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1834 places, 6523 transitions, 446483 flow [2022-01-19 14:56:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-19 14:56:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-01-19 14:56:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4586 transitions. [2022-01-19 14:56:54,140 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.634828349944629 [2022-01-19 14:56:54,140 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4586 transitions. [2022-01-19 14:56:54,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4586 transitions. [2022-01-19 14:56:54,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:56:54,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4586 transitions. [2022-01-19 14:56:54,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 54.595238095238095) internal successors, (4586), 84 states have internal predecessors, (4586), 0 states have call successors, (0), 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 14:56:54,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 86.0) internal successors, (7310), 85 states have internal predecessors, (7310), 0 states have call successors, (0), 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 14:56:54,148 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 86.0) internal successors, (7310), 85 states have internal predecessors, (7310), 0 states have call successors, (0), 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 14:56:54,149 INFO L186 Difference]: Start difference. First operand has 1758 places, 5967 transitions, 401737 flow. Second operand 84 states and 4586 transitions. [2022-01-19 14:56:54,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1834 places, 6523 transitions, 446483 flow [2022-01-19 14:57:36,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1803 places, 6523 transitions, 444971 flow, removed 204 selfloop flow, removed 31 redundant places. [2022-01-19 14:57:36,868 INFO L242 Difference]: Finished difference. Result has 1839 places, 6361 transitions, 440612 flow [2022-01-19 14:57:36,871 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=400327, PETRI_DIFFERENCE_MINUEND_PLACES=1720, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=440612, PETRI_PLACES=1839, PETRI_TRANSITIONS=6361} [2022-01-19 14:57:36,872 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1763 predicate places. [2022-01-19 14:57:36,872 INFO L470 AbstractCegarLoop]: Abstraction has has 1839 places, 6361 transitions, 440612 flow [2022-01-19 14:57:36,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 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 14:57:36,872 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:57:36,872 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, 1, 1] [2022-01-19 14:57:36,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-19 14:57:37,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-19 14:57:37,075 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:57:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:57:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash -166104477, now seen corresponding path program 38 times [2022-01-19 14:57:37,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:57:37,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716514767] [2022-01-19 14:57:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:57:37,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:57:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:57:37,224 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 14:57:37,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:57:37,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716514767] [2022-01-19 14:57:37,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716514767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:57:37,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200739865] [2022-01-19 14:57:37,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:57:37,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:57:37,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:57:37,226 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:57:37,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-19 14:57:37,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:57:37,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:57:37,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 14:57:37,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:57:37,592 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 14:57:37,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:57:37,995 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 14:57:37,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200739865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:57:37,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:57:37,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-01-19 14:57:37,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759717659] [2022-01-19 14:57:37,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:57:37,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 14:57:37,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:57:37,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 14:57:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-01-19 14:57:37,997 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 14:57:37,998 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1839 places, 6361 transitions, 440612 flow. Second operand has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 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 14:57:37,998 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:57:37,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 14:57:37,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:58:27,341 INFO L129 PetriNetUnfolder]: 4374/13063 cut-off events. [2022-01-19 14:58:27,341 INFO L130 PetriNetUnfolder]: For 2527626/2527641 co-relation queries the response was YES. [2022-01-19 14:58:27,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 313451 conditions, 13063 events. 4374/13063 cut-off events. For 2527626/2527641 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 149532 event pairs, 164 based on Foata normal form. 7/13032 useless extension candidates. Maximal degree in co-relation 312971. Up to 6839 conditions per place. [2022-01-19 14:58:27,932 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 2985 selfloop transitions, 3659 changer transitions 11/6696 dead transitions. [2022-01-19 14:58:27,933 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1857 places, 6696 transitions, 473464 flow [2022-01-19 14:58:27,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-19 14:58:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-01-19 14:58:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1562 transitions. [2022-01-19 14:58:27,936 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6486710963455149 [2022-01-19 14:58:27,936 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1562 transitions. [2022-01-19 14:58:27,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1562 transitions. [2022-01-19 14:58:27,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:58:27,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1562 transitions. [2022-01-19 14:58:27,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.785714285714285) internal successors, (1562), 28 states have internal predecessors, (1562), 0 states have call successors, (0), 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 14:58:27,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 86.0) internal successors, (2494), 29 states have internal predecessors, (2494), 0 states have call successors, (0), 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 14:58:27,939 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 86.0) internal successors, (2494), 29 states have internal predecessors, (2494), 0 states have call successors, (0), 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 14:58:27,939 INFO L186 Difference]: Start difference. First operand has 1839 places, 6361 transitions, 440612 flow. Second operand 28 states and 1562 transitions. [2022-01-19 14:58:27,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1857 places, 6696 transitions, 473464 flow Received shutdown request... [2022-01-19 14:58:55,296 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 14:58:55,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-19 14:58:55,315 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 14:58:55,315 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 14:58:55,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:58:55,497 WARN L594 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-01-19 14:58:55,498 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 14:58:55,498 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 14:58:55,501 INFO L732 BasicCegarLoop]: Path program histogram: [38, 1, 1, 1] [2022-01-19 14:58:55,502 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 14:58:55,503 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 14:58:55,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 02:58:55 BasicIcfg [2022-01-19 14:58:55,504 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 14:58:55,505 INFO L158 Benchmark]: Toolchain (without parser) took 825228.15ms. Allocated memory was 442.5MB in the beginning and 5.8GB in the end (delta: 5.4GB). Free memory was 387.7MB in the beginning and 3.6GB in the end (delta: -3.2GB). Peak memory consumption was 2.5GB. Max. memory is 16.0GB. [2022-01-19 14:58:55,505 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 442.5MB. Free memory is still 404.1MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 14:58:55,505 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.15ms. Allocated memory was 442.5MB in the beginning and 572.5MB in the end (delta: 130.0MB). Free memory was 387.5MB in the beginning and 544.6MB in the end (delta: -157.1MB). Peak memory consumption was 8.3MB. Max. memory is 16.0GB. [2022-01-19 14:58:55,505 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.51ms. Allocated memory is still 572.5MB. Free memory was 543.6MB in the beginning and 542.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 14:58:55,505 INFO L158 Benchmark]: Boogie Preprocessor took 14.33ms. Allocated memory is still 572.5MB. Free memory was 542.5MB in the beginning and 541.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 14:58:55,506 INFO L158 Benchmark]: RCFGBuilder took 324.31ms. Allocated memory is still 572.5MB. Free memory was 541.5MB in the beginning and 525.8MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-19 14:58:55,506 INFO L158 Benchmark]: TraceAbstraction took 824680.20ms. Allocated memory was 572.5MB in the beginning and 5.8GB in the end (delta: 5.3GB). Free memory was 525.8MB in the beginning and 3.6GB in the end (delta: -3.0GB). Peak memory consumption was 2.5GB. Max. memory is 16.0GB. [2022-01-19 14:58:55,507 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 442.5MB. Free memory is still 404.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 177.15ms. Allocated memory was 442.5MB in the beginning and 572.5MB in the end (delta: 130.0MB). Free memory was 387.5MB in the beginning and 544.6MB in the end (delta: -157.1MB). Peak memory consumption was 8.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.51ms. Allocated memory is still 572.5MB. Free memory was 543.6MB in the beginning and 542.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 14.33ms. Allocated memory is still 572.5MB. Free memory was 542.5MB in the beginning and 541.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 324.31ms. Allocated memory is still 572.5MB. Free memory was 541.5MB in the beginning and 525.8MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 824680.20ms. Allocated memory was 572.5MB in the beginning and 5.8GB in the end (delta: 5.3GB). Free memory was 525.8MB in the beginning and 3.6GB in the end (delta: -3.0GB). Peak memory consumption was 2.5GB. 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 executing RemoveRedundantFlow. - 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 executing RemoveRedundantFlow. - 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 executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 98 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: 824.6s, OverallIterations: 41, TraceHistogramMax: 1, PathProgramHistogramMax: 38, EmptinessCheckTime: 0.0s, AutomataDifference: 777.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9490 SdHoareTripleChecker+Valid, 19.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9490 mSDsluCounter, 13955 SdHoareTripleChecker+Invalid, 16.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 17947 mSDsCounter, 3458 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50082 IncrementalHoareTripleChecker+Invalid, 53540 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3458 mSolverCounterUnsat, 1397 mSDtfsCounter, 50082 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7616 GetRequests, 4634 SyntacticMatches, 80 SemanticMatches, 2902 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72272 ImplicationChecksByTransitivity, 63.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=440612occurred in iteration=40, InterpolantAutomatonStates: 2217, 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: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 35.9s InterpolantComputationTime, 5496 NumberOfCodeBlocks, 5460 NumberOfCodeBlocksAsserted, 111 NumberOfCheckSat, 8063 ConstructedInterpolants, 0 QuantifiedInterpolants, 61611 SizeOfPredicates, 463 NumberOfNonLiveVariables, 5917 ConjunctsInSsa, 767 ConjunctsInUnsatCore, 119 InterpolantComputations, 2 PerfectInterpolantSequences, 0/231 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