/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-channel-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 13:59:57,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 13:59:57,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 13:59:57,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 13:59:57,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 13:59:57,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 13:59:57,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 13:59:57,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 13:59:57,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 13:59:57,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 13:59:57,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 13:59:57,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 13:59:57,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 13:59:57,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 13:59:57,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 13:59:57,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 13:59:57,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 13:59:57,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 13:59:57,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 13:59:57,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 13:59:57,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 13:59:57,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 13:59:57,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 13:59:57,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 13:59:57,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 13:59:57,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 13:59:57,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 13:59:57,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 13:59:57,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 13:59:57,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 13:59:57,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 13:59:57,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 13:59:57,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 13:59:57,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 13:59:57,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 13:59:57,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 13:59:57,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 13:59:57,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 13:59:57,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 13:59:57,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 13:59:57,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 13:59:57,476 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 13:59:57,506 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 13:59:57,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 13:59:57,507 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 13:59:57,507 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 13:59:57,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 13:59:57,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 13:59:57,508 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 13:59:57,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 13:59:57,508 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 13:59:57,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 13:59:57,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 13:59:57,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 13:59:57,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 13:59:57,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 13:59:57,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 13:59:57,509 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 13:59:57,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 13:59:57,510 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 13:59:57,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 13:59:57,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 13:59:57,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 13:59:57,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 13:59:57,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 13:59:57,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 13:59:57,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 13:59:57,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 13:59:57,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 13:59:57,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 13:59:57,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 13:59:57,511 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 13:59:57,511 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 13:59:57,511 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=AFTER [2022-01-19 13:59:57,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 13:59:57,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 13:59:57,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 13:59:57,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 13:59:57,797 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 13:59:57,798 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 13:59:57,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2022-01-19 13:59:57,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/132b2afb4/47b7adcdbb2d4837951d4392c44b4a0c/FLAGaf1ca81dd [2022-01-19 13:59:58,245 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 13:59:58,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2022-01-19 13:59:58,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/132b2afb4/47b7adcdbb2d4837951d4392c44b4a0c/FLAGaf1ca81dd [2022-01-19 13:59:58,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/132b2afb4/47b7adcdbb2d4837951d4392c44b4a0c [2022-01-19 13:59:58,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 13:59:58,272 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 13:59:58,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 13:59:58,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 13:59:58,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 13:59:58,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:59:58" (1/1) ... [2022-01-19 13:59:58,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f906be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:59:58, skipping insertion in model container [2022-01-19 13:59:58,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:59:58" (1/1) ... [2022-01-19 13:59:58,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 13:59:58,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 13:59:58,530 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-channel-sum.wvr.c[2947,2960] [2022-01-19 13:59:58,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 13:59:58,544 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 13:59:58,580 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-channel-sum.wvr.c[2947,2960] [2022-01-19 13:59:58,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 13:59:58,596 INFO L208 MainTranslator]: Completed translation [2022-01-19 13:59:58,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:59:58 WrapperNode [2022-01-19 13:59:58,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 13:59:58,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 13:59:58,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 13:59:58,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 13:59:58,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:59:58" (1/1) ... [2022-01-19 13:59:58,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:59:58" (1/1) ... [2022-01-19 13:59:58,647 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 151 [2022-01-19 13:59:58,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 13:59:58,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 13:59:58,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 13:59:58,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 13:59:58,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:59:58" (1/1) ... [2022-01-19 13:59:58,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:59:58" (1/1) ... [2022-01-19 13:59:58,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:59:58" (1/1) ... [2022-01-19 13:59:58,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:59:58" (1/1) ... [2022-01-19 13:59:58,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:59:58" (1/1) ... [2022-01-19 13:59:58,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:59:58" (1/1) ... [2022-01-19 13:59:58,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:59:58" (1/1) ... [2022-01-19 13:59:58,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 13:59:58,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 13:59:58,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 13:59:58,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 13:59:58,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:59:58" (1/1) ... [2022-01-19 13:59:58,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 13:59:58,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:59:58,728 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 13:59:58,751 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 13:59:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 13:59:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 13:59:58,772 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 13:59:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 13:59:58,772 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 13:59:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 13:59:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 13:59:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 13:59:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 13:59:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 13:59:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-19 13:59:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 13:59:58,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 13:59:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 13:59:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 13:59:58,779 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 13:59:58,865 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 13:59:58,866 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 13:59:59,073 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 13:59:59,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 13:59:59,142 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-19 13:59:59,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:59:59 BoogieIcfgContainer [2022-01-19 13:59:59,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 13:59:59,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 13:59:59,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 13:59:59,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 13:59:59,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 01:59:58" (1/3) ... [2022-01-19 13:59:59,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a3298b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:59:59, skipping insertion in model container [2022-01-19 13:59:59,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:59:58" (2/3) ... [2022-01-19 13:59:59,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a3298b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:59:59, skipping insertion in model container [2022-01-19 13:59:59,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:59:59" (3/3) ... [2022-01-19 13:59:59,172 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2022-01-19 13:59:59,176 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 13:59:59,176 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 13:59:59,176 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 13:59:59,227 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,228 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,228 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,229 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,229 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,229 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,230 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,230 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,230 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,230 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,230 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,231 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,231 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,231 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,231 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,231 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,231 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,232 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,232 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,232 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,232 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,232 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,232 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,233 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,233 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,233 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,233 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,233 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,234 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,234 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,234 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,234 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,234 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,235 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,235 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,235 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,236 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,236 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,236 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,236 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,236 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,238 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,238 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,238 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,238 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,238 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,239 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,239 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,246 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,246 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,246 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,247 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,247 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,247 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,247 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,247 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,247 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,248 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,248 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,248 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,248 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,249 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,249 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,249 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,249 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,249 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,250 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,250 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,250 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,250 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,250 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,250 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,253 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,253 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,253 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,253 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,253 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,254 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,254 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,254 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,255 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,255 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,255 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,255 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,255 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,255 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,255 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,256 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,256 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:59:59,267 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 13:59:59,318 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 13:59:59,325 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 13:59:59,326 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 13:59:59,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 138 places, 142 transitions, 300 flow [2022-01-19 13:59:59,427 INFO L129 PetriNetUnfolder]: 11/140 cut-off events. [2022-01-19 13:59:59,427 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 13:59:59,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 140 events. 11/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2022-01-19 13:59:59,431 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 142 transitions, 300 flow [2022-01-19 13:59:59,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 131 transitions, 274 flow [2022-01-19 13:59:59,480 INFO L129 PetriNetUnfolder]: 11/130 cut-off events. [2022-01-19 13:59:59,480 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 13:59:59,481 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:59:59,481 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:59:59,482 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:59:59,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:59:59,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1559977782, now seen corresponding path program 1 times [2022-01-19 13:59:59,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:59:59,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982251844] [2022-01-19 13:59:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:59:59,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:59:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:59:59,731 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 13:59:59,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:59:59,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982251844] [2022-01-19 13:59:59,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982251844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:59:59,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:59:59,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 13:59:59,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820243494] [2022-01-19 13:59:59,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:59:59,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 13:59:59,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:59:59,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 13:59:59,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 13:59:59,776 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 142 [2022-01-19 13:59:59,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 131 transitions, 274 flow. Second operand has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:59:59,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:59:59,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 142 [2022-01-19 13:59:59,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:59:59,856 INFO L129 PetriNetUnfolder]: 11/144 cut-off events. [2022-01-19 13:59:59,857 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-01-19 13:59:59,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 144 events. 11/144 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 201 event pairs, 4 based on Foata normal form. 18/152 useless extension candidates. Maximal degree in co-relation 95. Up to 21 conditions per place. [2022-01-19 13:59:59,860 INFO L132 encePairwiseOnDemand]: 135/142 looper letters, 9 selfloop transitions, 0 changer transitions 3/124 dead transitions. [2022-01-19 13:59:59,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 124 transitions, 278 flow [2022-01-19 13:59:59,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 13:59:59,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 13:59:59,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 266 transitions. [2022-01-19 13:59:59,877 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9366197183098591 [2022-01-19 13:59:59,877 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 266 transitions. [2022-01-19 13:59:59,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 266 transitions. [2022-01-19 13:59:59,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:59:59,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 266 transitions. [2022-01-19 13:59:59,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 133.0) internal successors, (266), 2 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:59:59,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:59:59,895 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:59:59,896 INFO L186 Difference]: Start difference. First operand has 127 places, 131 transitions, 274 flow. Second operand 2 states and 266 transitions. [2022-01-19 13:59:59,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 124 transitions, 278 flow [2022-01-19 13:59:59,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 124 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 13:59:59,903 INFO L242 Difference]: Finished difference. Result has 124 places, 121 transitions, 246 flow [2022-01-19 13:59:59,905 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=246, PETRI_PLACES=124, PETRI_TRANSITIONS=121} [2022-01-19 13:59:59,909 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, -3 predicate places. [2022-01-19 13:59:59,910 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 121 transitions, 246 flow [2022-01-19 13:59:59,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:59:59,910 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:59:59,910 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:59:59,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 13:59:59,911 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:59:59,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:59:59,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1317567152, now seen corresponding path program 1 times [2022-01-19 13:59:59,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:59:59,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605210414] [2022-01-19 13:59:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:59:59,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:00:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:00:00,143 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 14:00:00,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:00:00,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605210414] [2022-01-19 14:00:00,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605210414] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:00:00,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:00:00,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:00:00,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265652128] [2022-01-19 14:00:00,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:00:00,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:00:00,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:00:00,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:00:00,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:00:00,149 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 142 [2022-01-19 14:00:00,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 121 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:00:00,151 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 142 [2022-01-19 14:00:00,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:00:00,265 INFO L129 PetriNetUnfolder]: 27/291 cut-off events. [2022-01-19 14:00:00,266 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-01-19 14:00:00,268 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 291 events. 27/291 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1037 event pairs, 4 based on Foata normal form. 1/268 useless extension candidates. Maximal degree in co-relation 359. Up to 34 conditions per place. [2022-01-19 14:00:00,269 INFO L132 encePairwiseOnDemand]: 137/142 looper letters, 29 selfloop transitions, 2 changer transitions 4/133 dead transitions. [2022-01-19 14:00:00,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 133 transitions, 343 flow [2022-01-19 14:00:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 14:00:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 14:00:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 576 transitions. [2022-01-19 14:00:00,272 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8112676056338028 [2022-01-19 14:00:00,272 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 576 transitions. [2022-01-19 14:00:00,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 576 transitions. [2022-01-19 14:00:00,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:00:00,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 576 transitions. [2022-01-19 14:00:00,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,278 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,278 INFO L186 Difference]: Start difference. First operand has 124 places, 121 transitions, 246 flow. Second operand 5 states and 576 transitions. [2022-01-19 14:00:00,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 133 transitions, 343 flow [2022-01-19 14:00:00,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 133 transitions, 343 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 14:00:00,282 INFO L242 Difference]: Finished difference. Result has 128 places, 122 transitions, 262 flow [2022-01-19 14:00:00,282 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2022-01-19 14:00:00,283 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 1 predicate places. [2022-01-19 14:00:00,283 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 262 flow [2022-01-19 14:00:00,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,284 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:00:00,285 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:00:00,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 14:00:00,285 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:00:00,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:00:00,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1193186558, now seen corresponding path program 1 times [2022-01-19 14:00:00,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:00:00,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684418054] [2022-01-19 14:00:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:00:00,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:00:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:00:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:00:00,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:00:00,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684418054] [2022-01-19 14:00:00,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684418054] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:00:00,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:00:00,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 14:00:00,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783837963] [2022-01-19 14:00:00,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:00:00,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 14:00:00,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:00:00,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 14:00:00,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-19 14:00:00,431 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-01-19 14:00:00,432 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:00:00,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-01-19 14:00:00,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:00:00,536 INFO L129 PetriNetUnfolder]: 105/445 cut-off events. [2022-01-19 14:00:00,536 INFO L130 PetriNetUnfolder]: For 16/17 co-relation queries the response was YES. [2022-01-19 14:00:00,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 445 events. 105/445 cut-off events. For 16/17 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1678 event pairs, 46 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 659. Up to 163 conditions per place. [2022-01-19 14:00:00,540 INFO L132 encePairwiseOnDemand]: 137/142 looper letters, 27 selfloop transitions, 6 changer transitions 3/137 dead transitions. [2022-01-19 14:00:00,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 137 transitions, 367 flow [2022-01-19 14:00:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 14:00:00,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 14:00:00,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2022-01-19 14:00:00,542 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8609154929577465 [2022-01-19 14:00:00,542 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2022-01-19 14:00:00,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2022-01-19 14:00:00,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:00:00,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2022-01-19 14:00:00,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,546 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,546 INFO L186 Difference]: Start difference. First operand has 128 places, 122 transitions, 262 flow. Second operand 4 states and 489 transitions. [2022-01-19 14:00:00,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 137 transitions, 367 flow [2022-01-19 14:00:00,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 137 transitions, 361 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 14:00:00,552 INFO L242 Difference]: Finished difference. Result has 128 places, 127 transitions, 293 flow [2022-01-19 14:00:00,552 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=128, PETRI_TRANSITIONS=127} [2022-01-19 14:00:00,554 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 1 predicate places. [2022-01-19 14:00:00,554 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 127 transitions, 293 flow [2022-01-19 14:00:00,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,555 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:00:00,555 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:00:00,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 14:00:00,556 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:00:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:00:00,558 INFO L85 PathProgramCache]: Analyzing trace with hash -152225810, now seen corresponding path program 1 times [2022-01-19 14:00:00,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:00:00,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540718006] [2022-01-19 14:00:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:00:00,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:00:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:00:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:00:00,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:00:00,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540718006] [2022-01-19 14:00:00,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540718006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:00:00,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:00:00,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 14:00:00,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666267075] [2022-01-19 14:00:00,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:00:00,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 14:00:00,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:00:00,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 14:00:00,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 14:00:00,703 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 142 [2022-01-19 14:00:00,704 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 127 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,704 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:00:00,704 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 142 [2022-01-19 14:00:00,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:00:00,757 INFO L129 PetriNetUnfolder]: 30/232 cut-off events. [2022-01-19 14:00:00,758 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-01-19 14:00:00,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 232 events. 30/232 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 703 event pairs, 13 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 331. Up to 56 conditions per place. [2022-01-19 14:00:00,759 INFO L132 encePairwiseOnDemand]: 139/142 looper letters, 18 selfloop transitions, 2 changer transitions 1/131 dead transitions. [2022-01-19 14:00:00,759 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 131 transitions, 339 flow [2022-01-19 14:00:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 14:00:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 14:00:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 384 transitions. [2022-01-19 14:00:00,761 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9014084507042254 [2022-01-19 14:00:00,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 384 transitions. [2022-01-19 14:00:00,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 384 transitions. [2022-01-19 14:00:00,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:00:00,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 384 transitions. [2022-01-19 14:00:00,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,764 INFO L186 Difference]: Start difference. First operand has 128 places, 127 transitions, 293 flow. Second operand 3 states and 384 transitions. [2022-01-19 14:00:00,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 131 transitions, 339 flow [2022-01-19 14:00:00,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 131 transitions, 337 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-01-19 14:00:00,770 INFO L242 Difference]: Finished difference. Result has 131 places, 126 transitions, 293 flow [2022-01-19 14:00:00,770 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=131, PETRI_TRANSITIONS=126} [2022-01-19 14:00:00,771 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 4 predicate places. [2022-01-19 14:00:00,772 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 126 transitions, 293 flow [2022-01-19 14:00:00,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,772 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:00:00,772 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:00:00,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 14:00:00,773 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:00:00,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:00:00,774 INFO L85 PathProgramCache]: Analyzing trace with hash -873764727, now seen corresponding path program 1 times [2022-01-19 14:00:00,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:00:00,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056440752] [2022-01-19 14:00:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:00:00,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:00:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:00:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:00:00,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:00:00,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056440752] [2022-01-19 14:00:00,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056440752] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:00:00,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:00:00,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:00:00,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640925279] [2022-01-19 14:00:00,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:00:00,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:00:00,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:00:00,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:00:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:00:00,934 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-01-19 14:00:00,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 126 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:00,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:00:00,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-01-19 14:00:00,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:00:01,060 INFO L129 PetriNetUnfolder]: 122/513 cut-off events. [2022-01-19 14:00:01,060 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-01-19 14:00:01,062 INFO L84 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 513 events. 122/513 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2140 event pairs, 48 based on Foata normal form. 5/490 useless extension candidates. Maximal degree in co-relation 825. Up to 142 conditions per place. [2022-01-19 14:00:01,065 INFO L132 encePairwiseOnDemand]: 137/142 looper letters, 26 selfloop transitions, 3 changer transitions 9/140 dead transitions. [2022-01-19 14:00:01,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 140 transitions, 402 flow [2022-01-19 14:00:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 14:00:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 14:00:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 604 transitions. [2022-01-19 14:00:01,074 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8507042253521127 [2022-01-19 14:00:01,074 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 604 transitions. [2022-01-19 14:00:01,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 604 transitions. [2022-01-19 14:00:01,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:00:01,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 604 transitions. [2022-01-19 14:00:01,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.8) internal successors, (604), 5 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:01,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:01,078 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:01,078 INFO L186 Difference]: Start difference. First operand has 131 places, 126 transitions, 293 flow. Second operand 5 states and 604 transitions. [2022-01-19 14:00:01,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 140 transitions, 402 flow [2022-01-19 14:00:01,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 140 transitions, 400 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 14:00:01,082 INFO L242 Difference]: Finished difference. Result has 135 places, 124 transitions, 289 flow [2022-01-19 14:00:01,082 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=135, PETRI_TRANSITIONS=124} [2022-01-19 14:00:01,084 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 8 predicate places. [2022-01-19 14:00:01,084 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 124 transitions, 289 flow [2022-01-19 14:00:01,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:01,086 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:00:01,086 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:00:01,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 14:00:01,086 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:00:01,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:00:01,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1497190495, now seen corresponding path program 2 times [2022-01-19 14:00:01,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:00:01,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755517162] [2022-01-19 14:00:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:00:01,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:00:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:00:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:00:01,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:00:01,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755517162] [2022-01-19 14:00:01,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755517162] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:00:01,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:00:01,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-19 14:00:01,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014688089] [2022-01-19 14:00:01,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:00:01,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-19 14:00:01,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:00:01,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-19 14:00:01,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-19 14:00:01,228 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 142 [2022-01-19 14:00:01,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 124 transitions, 289 flow. Second operand has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:01,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:00:01,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 142 [2022-01-19 14:00:01,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:00:01,567 INFO L129 PetriNetUnfolder]: 169/645 cut-off events. [2022-01-19 14:00:01,567 INFO L130 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2022-01-19 14:00:01,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1106 conditions, 645 events. 169/645 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2855 event pairs, 40 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 1096. Up to 117 conditions per place. [2022-01-19 14:00:01,571 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 47 selfloop transitions, 6 changer transitions 41/180 dead transitions. [2022-01-19 14:00:01,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 180 transitions, 614 flow [2022-01-19 14:00:01,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 14:00:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 14:00:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1257 transitions. [2022-01-19 14:00:01,574 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7376760563380281 [2022-01-19 14:00:01,574 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1257 transitions. [2022-01-19 14:00:01,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1257 transitions. [2022-01-19 14:00:01,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:00:01,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1257 transitions. [2022-01-19 14:00:01,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.75) internal successors, (1257), 12 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:01,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:01,580 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:01,581 INFO L186 Difference]: Start difference. First operand has 135 places, 124 transitions, 289 flow. Second operand 12 states and 1257 transitions. [2022-01-19 14:00:01,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 180 transitions, 614 flow [2022-01-19 14:00:01,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 180 transitions, 602 flow, removed 2 selfloop flow, removed 4 redundant places. [2022-01-19 14:00:01,585 INFO L242 Difference]: Finished difference. Result has 146 places, 125 transitions, 313 flow [2022-01-19 14:00:01,585 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=313, PETRI_PLACES=146, PETRI_TRANSITIONS=125} [2022-01-19 14:00:01,586 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 19 predicate places. [2022-01-19 14:00:01,586 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 125 transitions, 313 flow [2022-01-19 14:00:01,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:01,587 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:00:01,587 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:00:01,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 14:00:01,587 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:00:01,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:00:01,587 INFO L85 PathProgramCache]: Analyzing trace with hash 756272725, now seen corresponding path program 1 times [2022-01-19 14:00:01,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:00:01,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703873524] [2022-01-19 14:00:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:00:01,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:00:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:00:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:00:01,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:00:01,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703873524] [2022-01-19 14:00:01,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703873524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:00:01,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987093925] [2022-01-19 14:00:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:00:01,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:00:01,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:00:01,759 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 14:00:01,760 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 14:00:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:00:01,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-19 14:00:01,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:00:02,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 14:00:02,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 14:00:02,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 14:00:03,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 14:00:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:00:03,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:00:04,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:00:04,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 72 [2022-01-19 14:00:04,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:00:04,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 224 [2022-01-19 14:00:05,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:00:05,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 206 [2022-01-19 14:00:05,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:00:05,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 170 [2022-01-19 14:00:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:00:06,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987093925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:00:06,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:00:06,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 28, 25] total 52 [2022-01-19 14:00:06,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423355611] [2022-01-19 14:00:06,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:00:06,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-19 14:00:06,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:00:06,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-19 14:00:06,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=2150, Unknown=34, NotChecked=0, Total=2652 [2022-01-19 14:00:06,126 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2022-01-19 14:00:06,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 125 transitions, 313 flow. Second operand has 52 states, 52 states have (on average 59.26923076923077) internal successors, (3082), 52 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:06,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:00:06,129 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2022-01-19 14:00:06,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:00:09,210 INFO L129 PetriNetUnfolder]: 810/1870 cut-off events. [2022-01-19 14:00:09,210 INFO L130 PetriNetUnfolder]: For 373/373 co-relation queries the response was YES. [2022-01-19 14:00:09,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3886 conditions, 1870 events. 810/1870 cut-off events. For 373/373 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 10974 event pairs, 54 based on Foata normal form. 11/1824 useless extension candidates. Maximal degree in co-relation 3872. Up to 324 conditions per place. [2022-01-19 14:00:09,224 INFO L132 encePairwiseOnDemand]: 106/142 looper letters, 191 selfloop transitions, 81 changer transitions 8/331 dead transitions. [2022-01-19 14:00:09,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 331 transitions, 1431 flow [2022-01-19 14:00:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-19 14:00:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-01-19 14:00:09,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3141 transitions. [2022-01-19 14:00:09,233 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43371996685998343 [2022-01-19 14:00:09,233 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3141 transitions. [2022-01-19 14:00:09,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3141 transitions. [2022-01-19 14:00:09,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:00:09,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3141 transitions. [2022-01-19 14:00:09,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 61.588235294117645) internal successors, (3141), 51 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:09,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 142.0) internal successors, (7384), 52 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:09,253 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 142.0) internal successors, (7384), 52 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:09,253 INFO L186 Difference]: Start difference. First operand has 146 places, 125 transitions, 313 flow. Second operand 51 states and 3141 transitions. [2022-01-19 14:00:09,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 331 transitions, 1431 flow [2022-01-19 14:00:09,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 331 transitions, 1347 flow, removed 38 selfloop flow, removed 7 redundant places. [2022-01-19 14:00:09,261 INFO L242 Difference]: Finished difference. Result has 216 places, 197 transitions, 897 flow [2022-01-19 14:00:09,262 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=897, PETRI_PLACES=216, PETRI_TRANSITIONS=197} [2022-01-19 14:00:09,262 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 89 predicate places. [2022-01-19 14:00:09,263 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 197 transitions, 897 flow [2022-01-19 14:00:09,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 59.26923076923077) internal successors, (3082), 52 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:09,264 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:00:09,264 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:00:09,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-19 14:00:09,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:00:09,486 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:00:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:00:09,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1655218113, now seen corresponding path program 2 times [2022-01-19 14:00:09,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:00:09,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826053012] [2022-01-19 14:00:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:00:09,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:00:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:00:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:00:09,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:00:09,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826053012] [2022-01-19 14:00:09,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826053012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:00:09,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817451305] [2022-01-19 14:00:09,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:00:09,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:00:09,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:00:09,592 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 14:00:09,617 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 14:00:09,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:00:09,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:00:09,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:00:09,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:00:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:00:09,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:00:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:00:10,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817451305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:00:10,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:00:10,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 9 [2022-01-19 14:00:10,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660145607] [2022-01-19 14:00:10,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:00:10,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 14:00:10,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:00:10,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 14:00:10,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-19 14:00:10,230 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 142 [2022-01-19 14:00:10,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 197 transitions, 897 flow. Second operand has 9 states, 9 states have (on average 115.66666666666667) internal successors, (1041), 9 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:10,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:00:10,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 142 [2022-01-19 14:00:10,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:00:10,720 INFO L129 PetriNetUnfolder]: 615/1911 cut-off events. [2022-01-19 14:00:10,720 INFO L130 PetriNetUnfolder]: For 9808/9826 co-relation queries the response was YES. [2022-01-19 14:00:10,733 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6538 conditions, 1911 events. 615/1911 cut-off events. For 9808/9826 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 11673 event pairs, 39 based on Foata normal form. 12/1839 useless extension candidates. Maximal degree in co-relation 6495. Up to 394 conditions per place. [2022-01-19 14:00:10,743 INFO L132 encePairwiseOnDemand]: 133/142 looper letters, 146 selfloop transitions, 85 changer transitions 19/375 dead transitions. [2022-01-19 14:00:10,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 375 transitions, 2687 flow [2022-01-19 14:00:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 14:00:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 14:00:10,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1435 transitions. [2022-01-19 14:00:10,746 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421361502347418 [2022-01-19 14:00:10,747 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1435 transitions. [2022-01-19 14:00:10,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1435 transitions. [2022-01-19 14:00:10,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:00:10,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1435 transitions. [2022-01-19 14:00:10,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 119.58333333333333) internal successors, (1435), 12 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:10,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:10,753 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:10,753 INFO L186 Difference]: Start difference. First operand has 216 places, 197 transitions, 897 flow. Second operand 12 states and 1435 transitions. [2022-01-19 14:00:10,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 375 transitions, 2687 flow [2022-01-19 14:00:10,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 375 transitions, 2582 flow, removed 33 selfloop flow, removed 16 redundant places. [2022-01-19 14:00:10,775 INFO L242 Difference]: Finished difference. Result has 215 places, 285 transitions, 1785 flow [2022-01-19 14:00:10,776 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1785, PETRI_PLACES=215, PETRI_TRANSITIONS=285} [2022-01-19 14:00:10,776 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 88 predicate places. [2022-01-19 14:00:10,776 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 285 transitions, 1785 flow [2022-01-19 14:00:10,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 115.66666666666667) internal successors, (1041), 9 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:10,777 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:00:10,777 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:00:10,806 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 14:00:11,000 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,SelfDestructingSolverStorable7 [2022-01-19 14:00:11,001 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:00:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:00:11,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1666240596, now seen corresponding path program 3 times [2022-01-19 14:00:11,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:00:11,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678948738] [2022-01-19 14:00:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:00:11,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:00:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:00:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-19 14:00:11,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:00:11,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678948738] [2022-01-19 14:00:11,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678948738] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:00:11,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:00:11,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 14:00:11,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747441458] [2022-01-19 14:00:11,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:00:11,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 14:00:11,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:00:11,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 14:00:11,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-19 14:00:11,098 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 142 [2022-01-19 14:00:11,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 285 transitions, 1785 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:11,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:00:11,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 142 [2022-01-19 14:00:11,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:00:11,383 INFO L129 PetriNetUnfolder]: 363/1679 cut-off events. [2022-01-19 14:00:11,383 INFO L130 PetriNetUnfolder]: For 9000/9208 co-relation queries the response was YES. [2022-01-19 14:00:11,396 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5484 conditions, 1679 events. 363/1679 cut-off events. For 9000/9208 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 11025 event pairs, 92 based on Foata normal form. 147/1713 useless extension candidates. Maximal degree in co-relation 5437. Up to 362 conditions per place. [2022-01-19 14:00:11,404 INFO L132 encePairwiseOnDemand]: 138/142 looper letters, 116 selfloop transitions, 4 changer transitions 0/275 dead transitions. [2022-01-19 14:00:11,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 275 transitions, 1910 flow [2022-01-19 14:00:11,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 14:00:11,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 14:00:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2022-01-19 14:00:11,406 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8855633802816901 [2022-01-19 14:00:11,406 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2022-01-19 14:00:11,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2022-01-19 14:00:11,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:00:11,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2022-01-19 14:00:11,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:11,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:11,409 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:11,409 INFO L186 Difference]: Start difference. First operand has 215 places, 285 transitions, 1785 flow. Second operand 4 states and 503 transitions. [2022-01-19 14:00:11,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 275 transitions, 1910 flow [2022-01-19 14:00:11,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 275 transitions, 1818 flow, removed 43 selfloop flow, removed 2 redundant places. [2022-01-19 14:00:11,433 INFO L242 Difference]: Finished difference. Result has 218 places, 265 transitions, 1533 flow [2022-01-19 14:00:11,434 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1533, PETRI_PLACES=218, PETRI_TRANSITIONS=265} [2022-01-19 14:00:11,434 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 91 predicate places. [2022-01-19 14:00:11,435 INFO L470 AbstractCegarLoop]: Abstraction has has 218 places, 265 transitions, 1533 flow [2022-01-19 14:00:11,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:11,435 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:00:11,435 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:00:11,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-19 14:00:11,436 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:00:11,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:00:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash 207056101, now seen corresponding path program 1 times [2022-01-19 14:00:11,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:00:11,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075192803] [2022-01-19 14:00:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:00:11,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:00:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:00:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-19 14:00:11,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:00:11,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075192803] [2022-01-19 14:00:11,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075192803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:00:11,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549042863] [2022-01-19 14:00:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:00:11,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:00:11,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:00:11,585 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 14:00:11,587 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 14:00:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:00:11,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:00:11,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:00:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:00:12,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:00:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 14:00:13,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549042863] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:00:13,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:00:13,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 15] total 35 [2022-01-19 14:00:13,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461123091] [2022-01-19 14:00:13,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:00:13,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-19 14:00:13,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:00:13,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-19 14:00:13,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-01-19 14:00:13,011 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 142 [2022-01-19 14:00:13,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 265 transitions, 1533 flow. Second operand has 35 states, 35 states have (on average 98.05714285714286) internal successors, (3432), 35 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:13,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:00:13,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 142 [2022-01-19 14:00:13,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:00:13,920 INFO L129 PetriNetUnfolder]: 447/1756 cut-off events. [2022-01-19 14:00:13,921 INFO L130 PetriNetUnfolder]: For 8582/8596 co-relation queries the response was YES. [2022-01-19 14:00:13,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6296 conditions, 1756 events. 447/1756 cut-off events. For 8582/8596 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 10383 event pairs, 240 based on Foata normal form. 23/1702 useless extension candidates. Maximal degree in co-relation 6247. Up to 860 conditions per place. [2022-01-19 14:00:13,939 INFO L132 encePairwiseOnDemand]: 123/142 looper letters, 101 selfloop transitions, 14 changer transitions 27/236 dead transitions. [2022-01-19 14:00:13,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 236 transitions, 1519 flow [2022-01-19 14:00:13,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-19 14:00:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-01-19 14:00:13,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2166 transitions. [2022-01-19 14:00:13,947 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6933418693982074 [2022-01-19 14:00:13,947 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2166 transitions. [2022-01-19 14:00:13,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2166 transitions. [2022-01-19 14:00:13,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:00:13,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2166 transitions. [2022-01-19 14:00:13,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 98.45454545454545) internal successors, (2166), 22 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:13,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:13,958 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:13,958 INFO L186 Difference]: Start difference. First operand has 218 places, 265 transitions, 1533 flow. Second operand 22 states and 2166 transitions. [2022-01-19 14:00:13,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 236 transitions, 1519 flow [2022-01-19 14:00:13,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 236 transitions, 1468 flow, removed 25 selfloop flow, removed 3 redundant places. [2022-01-19 14:00:13,977 INFO L242 Difference]: Finished difference. Result has 233 places, 204 transitions, 1068 flow [2022-01-19 14:00:13,978 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1068, PETRI_PLACES=233, PETRI_TRANSITIONS=204} [2022-01-19 14:00:13,979 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 106 predicate places. [2022-01-19 14:00:13,979 INFO L470 AbstractCegarLoop]: Abstraction has has 233 places, 204 transitions, 1068 flow [2022-01-19 14:00:13,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 98.05714285714286) internal successors, (3432), 35 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:00:13,980 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:00:13,981 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:00:14,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 14:00:14,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:00:14,195 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:00:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:00:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1887549627, now seen corresponding path program 2 times [2022-01-19 14:00:14,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:00:14,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644954115] [2022-01-19 14:00:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:00:14,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:00:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:00:15,913 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:00:15,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:00:15,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644954115] [2022-01-19 14:00:15,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644954115] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:00:15,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346015839] [2022-01-19 14:00:15,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:00:15,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:00:15,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:00:15,915 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 14:00:15,916 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 14:00:15,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:00:15,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:00:16,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 76 conjunts are in the unsatisfiable core [2022-01-19 14:00:16,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:00:16,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 14:00:17,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 14:00:17,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 14:00:18,696 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-19 14:00:18,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 15 [2022-01-19 14:00:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:00:18,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:00:21,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:00:21,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 125 [2022-01-19 14:00:21,714 INFO L353 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-01-19 14:00:21,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 808 treesize of output 758 [2022-01-19 14:00:21,756 INFO L353 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-01-19 14:00:21,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 706 treesize of output 602 [2022-01-19 14:00:21,791 INFO L353 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-01-19 14:00:21,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 550 treesize of output 524 [2022-01-19 14:00:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:00:25,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346015839] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:00:25,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:00:25,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 36] total 103 [2022-01-19 14:00:25,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774979403] [2022-01-19 14:00:25,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:00:25,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-19 14:00:25,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:00:25,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-19 14:00:25,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=9253, Unknown=50, NotChecked=0, Total=10506 [2022-01-19 14:00:25,404 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 142 [2022-01-19 14:00:25,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 204 transitions, 1068 flow. Second operand has 103 states, 103 states have (on average 54.271844660194176) internal successors, (5590), 103 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 14:00:25,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:00:25,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 142 [2022-01-19 14:00:25,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:01:04,931 INFO L129 PetriNetUnfolder]: 6652/15630 cut-off events. [2022-01-19 14:01:04,931 INFO L130 PetriNetUnfolder]: For 107435/107487 co-relation queries the response was YES. [2022-01-19 14:01:05,027 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63709 conditions, 15630 events. 6652/15630 cut-off events. For 107435/107487 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 146425 event pairs, 279 based on Foata normal form. 20/15135 useless extension candidates. Maximal degree in co-relation 63657. Up to 2128 conditions per place. [2022-01-19 14:01:05,107 INFO L132 encePairwiseOnDemand]: 99/142 looper letters, 1040 selfloop transitions, 813 changer transitions 95/1999 dead transitions. [2022-01-19 14:01:05,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 1999 transitions, 19641 flow [2022-01-19 14:01:05,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 312 states. [2022-01-19 14:01:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2022-01-19 14:01:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 17836 transitions. [2022-01-19 14:01:05,138 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4025821596244131 [2022-01-19 14:01:05,138 INFO L72 ComplementDD]: Start complementDD. Operand 312 states and 17836 transitions. [2022-01-19 14:01:05,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 312 states and 17836 transitions. [2022-01-19 14:01:05,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:01:05,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 312 states and 17836 transitions. [2022-01-19 14:01:05,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 313 states, 312 states have (on average 57.166666666666664) internal successors, (17836), 312 states have internal predecessors, (17836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:01:05,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 313 states, 313 states have (on average 142.0) internal successors, (44446), 313 states have internal predecessors, (44446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:01:05,273 INFO L81 ComplementDD]: Finished complementDD. Result has 313 states, 313 states have (on average 142.0) internal successors, (44446), 313 states have internal predecessors, (44446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:01:05,273 INFO L186 Difference]: Start difference. First operand has 233 places, 204 transitions, 1068 flow. Second operand 312 states and 17836 transitions. [2022-01-19 14:01:05,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 1999 transitions, 19641 flow [2022-01-19 14:01:05,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1999 transitions, 18408 flow, removed 607 selfloop flow, removed 19 redundant places. [2022-01-19 14:01:05,425 INFO L242 Difference]: Finished difference. Result has 651 places, 1149 transitions, 12938 flow [2022-01-19 14:01:05,426 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=312, PETRI_FLOW=12938, PETRI_PLACES=651, PETRI_TRANSITIONS=1149} [2022-01-19 14:01:05,426 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 524 predicate places. [2022-01-19 14:01:05,426 INFO L470 AbstractCegarLoop]: Abstraction has has 651 places, 1149 transitions, 12938 flow [2022-01-19 14:01:05,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 54.271844660194176) internal successors, (5590), 103 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 14:01:05,428 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:01:05,428 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:01:05,455 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 14:01:05,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:01:05,643 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:01:05,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:01:05,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1593357063, now seen corresponding path program 3 times [2022-01-19 14:01:05,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:01:05,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66316254] [2022-01-19 14:01:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:01:05,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:01:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:01:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:01:07,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:01:07,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66316254] [2022-01-19 14:01:07,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66316254] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:01:07,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416875484] [2022-01-19 14:01:07,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:01:07,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:01:07,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:01:07,122 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 14:01:07,123 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 14:01:07,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 14:01:07,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:01:07,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 90 conjunts are in the unsatisfiable core [2022-01-19 14:01:07,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:01:08,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 14:01:08,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 14:01:08,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 14:01:10,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 14:01:10,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 14:01:10,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-19 14:01:10,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:01:10,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 22 [2022-01-19 14:01:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:01:10,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:01:22,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:01:22,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2022-01-19 14:01:22,650 INFO L353 Elim1Store]: treesize reduction 73, result has 24.7 percent of original size [2022-01-19 14:01:22,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 784 treesize of output 711 [2022-01-19 14:01:22,692 INFO L353 Elim1Store]: treesize reduction 80, result has 17.5 percent of original size [2022-01-19 14:01:22,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 688 treesize of output 632 [2022-01-19 14:01:22,733 INFO L353 Elim1Store]: treesize reduction 80, result has 17.5 percent of original size [2022-01-19 14:01:22,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 616 treesize of output 488 [2022-01-19 14:01:22,754 INFO L884 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2022-01-19 14:01:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:01:24,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416875484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:01:24,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:01:24,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 46, 43] total 114 [2022-01-19 14:01:24,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738016967] [2022-01-19 14:01:24,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:01:24,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-19 14:01:24,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:01:24,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-19 14:01:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1632, Invalid=11210, Unknown=40, NotChecked=0, Total=12882 [2022-01-19 14:01:24,579 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2022-01-19 14:01:24,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 1149 transitions, 12938 flow. Second operand has 114 states, 114 states have (on average 55.18421052631579) internal successors, (6291), 114 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:01:24,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:01:24,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2022-01-19 14:01:24,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:04:30,735 INFO L129 PetriNetUnfolder]: 45901/112574 cut-off events. [2022-01-19 14:04:30,736 INFO L130 PetriNetUnfolder]: For 13346961/13350549 co-relation queries the response was YES. [2022-01-19 14:04:35,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 964813 conditions, 112574 events. 45901/112574 cut-off events. For 13346961/13350549 co-relation queries the response was YES. Maximal size of possible extension queue 2739. Compared 1422140 event pairs, 1880 based on Foata normal form. 1043/108376 useless extension candidates. Maximal degree in co-relation 964622. Up to 13899 conditions per place. [2022-01-19 14:04:35,788 INFO L132 encePairwiseOnDemand]: 95/142 looper letters, 5817 selfloop transitions, 7916 changer transitions 894/14676 dead transitions. [2022-01-19 14:04:35,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1444 places, 14676 transitions, 243005 flow [2022-01-19 14:04:35,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 801 states. [2022-01-19 14:04:35,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 801 states. [2022-01-19 14:04:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 46898 transitions. [2022-01-19 14:04:35,843 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4123191081570572 [2022-01-19 14:04:35,844 INFO L72 ComplementDD]: Start complementDD. Operand 801 states and 46898 transitions. [2022-01-19 14:04:35,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 801 states and 46898 transitions. [2022-01-19 14:04:35,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:04:35,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 801 states and 46898 transitions. [2022-01-19 14:04:35,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 802 states, 801 states have (on average 58.54931335830212) internal successors, (46898), 801 states have internal predecessors, (46898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:36,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 802 states, 802 states have (on average 142.0) internal successors, (113884), 802 states have internal predecessors, (113884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:36,059 INFO L81 ComplementDD]: Finished complementDD. Result has 802 states, 802 states have (on average 142.0) internal successors, (113884), 802 states have internal predecessors, (113884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:36,059 INFO L186 Difference]: Start difference. First operand has 651 places, 1149 transitions, 12938 flow. Second operand 801 states and 46898 transitions. [2022-01-19 14:04:36,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1444 places, 14676 transitions, 243005 flow [2022-01-19 14:05:18,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1411 places, 14676 transitions, 191853 flow, removed 22981 selfloop flow, removed 33 redundant places. [2022-01-19 14:05:18,464 INFO L242 Difference]: Finished difference. Result has 1999 places, 9991 transitions, 127734 flow [2022-01-19 14:05:18,466 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=7913, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=591, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=801, PETRI_FLOW=127734, PETRI_PLACES=1999, PETRI_TRANSITIONS=9991} [2022-01-19 14:05:18,466 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 1872 predicate places. [2022-01-19 14:05:18,467 INFO L470 AbstractCegarLoop]: Abstraction has has 1999 places, 9991 transitions, 127734 flow [2022-01-19 14:05:18,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 55.18421052631579) internal successors, (6291), 114 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:18,468 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:18,468 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:05:18,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 14:05:18,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 14:05:18,669 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:18,669 INFO L85 PathProgramCache]: Analyzing trace with hash -522964649, now seen corresponding path program 4 times [2022-01-19 14:05:18,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:18,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446564935] [2022-01-19 14:05:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:18,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:05:19,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:19,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446564935] [2022-01-19 14:05:19,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446564935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:19,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728782601] [2022-01-19 14:05:19,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:05:19,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:19,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:19,926 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 14:05:19,927 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 14:05:19,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:05:19,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:05:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 63 conjunts are in the unsatisfiable core [2022-01-19 14:05:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:21,617 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-19 14:05:21,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 15 [2022-01-19 14:05:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:05:21,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:22,773 INFO L353 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-01-19 14:05:22,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 78 [2022-01-19 14:05:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:05:24,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728782601] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:24,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:24,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 30, 30] total 89 [2022-01-19 14:05:24,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255951672] [2022-01-19 14:05:24,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:24,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-19 14:05:24,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:24,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-19 14:05:24,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=6998, Unknown=0, NotChecked=0, Total=7832 [2022-01-19 14:05:24,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 142 [2022-01-19 14:05:24,072 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1999 places, 9991 transitions, 127734 flow. Second operand has 89 states, 89 states have (on average 54.71910112359551) internal successors, (4870), 89 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:24,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:24,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 142 [2022-01-19 14:05:24,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand