/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-mult-equiv.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 14:43:04,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 14:43:04,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 14:43:04,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 14:43:04,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 14:43:04,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 14:43:04,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 14:43:04,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 14:43:04,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 14:43:04,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 14:43:04,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 14:43:04,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 14:43:04,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 14:43:04,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 14:43:04,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 14:43:04,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 14:43:04,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 14:43:04,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 14:43:04,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 14:43:04,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 14:43:04,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 14:43:04,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 14:43:04,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 14:43:04,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 14:43:04,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 14:43:04,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 14:43:04,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 14:43:04,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 14:43:04,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 14:43:04,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 14:43:04,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 14:43:04,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 14:43:04,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 14:43:04,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 14:43:04,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 14:43:04,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 14:43:04,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 14:43:04,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 14:43:04,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 14:43:04,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 14:43:04,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 14:43:04,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-After.epf [2022-01-19 14:43:04,508 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 14:43:04,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 14:43:04,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 14:43:04,509 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 14:43:04,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 14:43:04,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 14:43:04,509 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 14:43:04,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 14:43:04,509 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 14:43:04,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 14:43:04,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 14:43:04,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 14:43:04,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 14:43:04,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 14:43:04,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 14:43:04,510 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 14:43:04,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 14:43:04,511 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 14:43:04,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 14:43:04,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 14:43:04,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 14:43:04,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 14:43:04,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 14:43:04,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:43:04,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 14:43:04,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 14:43:04,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 14:43:04,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 14:43:04,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 14:43:04,515 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 14:43:04,515 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 14:43:04,515 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=AFTER [2022-01-19 14:43:04,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 14:43:04,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 14:43:04,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 14:43:04,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 14:43:04,734 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 14:43:04,736 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 14:43:04,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2022-01-19 14:43:04,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23bda1178/d794d253c5334d0e929283f213c592f5/FLAGb776209c4 [2022-01-19 14:43:05,156 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 14:43:05,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2022-01-19 14:43:05,161 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23bda1178/d794d253c5334d0e929283f213c592f5/FLAGb776209c4 [2022-01-19 14:43:05,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23bda1178/d794d253c5334d0e929283f213c592f5 [2022-01-19 14:43:05,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 14:43:05,174 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 14:43:05,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 14:43:05,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 14:43:05,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 14:43:05,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:43:05" (1/1) ... [2022-01-19 14:43:05,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a0012fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:43:05, skipping insertion in model container [2022-01-19 14:43:05,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:43:05" (1/1) ... [2022-01-19 14:43:05,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 14:43:05,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 14:43:05,360 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-mult-equiv.wvr.c[2591,2604] [2022-01-19 14:43:05,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:43:05,369 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 14:43:05,387 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-mult-equiv.wvr.c[2591,2604] [2022-01-19 14:43:05,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:43:05,402 INFO L208 MainTranslator]: Completed translation [2022-01-19 14:43:05,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:43:05 WrapperNode [2022-01-19 14:43:05,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 14:43:05,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 14:43:05,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 14:43:05,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 14:43:05,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:43:05" (1/1) ... [2022-01-19 14:43:05,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:43:05" (1/1) ... [2022-01-19 14:43:05,429 INFO L137 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-01-19 14:43:05,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 14:43:05,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 14:43:05,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 14:43:05,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 14:43:05,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:43:05" (1/1) ... [2022-01-19 14:43:05,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:43:05" (1/1) ... [2022-01-19 14:43:05,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:43:05" (1/1) ... [2022-01-19 14:43:05,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:43:05" (1/1) ... [2022-01-19 14:43:05,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:43:05" (1/1) ... [2022-01-19 14:43:05,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:43:05" (1/1) ... [2022-01-19 14:43:05,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:43:05" (1/1) ... [2022-01-19 14:43:05,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 14:43:05,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 14:43:05,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 14:43:05,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 14:43:05,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:43:05" (1/1) ... [2022-01-19 14:43:05,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:43:05,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:43:05,483 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 14:43:05,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-19 14:43:05,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 14:43:05,515 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 14:43:05,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 14:43:05,515 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 14:43:05,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 14:43:05,515 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-19 14:43:05,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-19 14:43:05,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 14:43:05,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 14:43:05,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 14:43:05,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 14:43:05,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 14:43:05,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 14:43:05,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 14:43:05,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 14:43:05,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 14:43:05,518 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 14:43:05,601 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 14:43:05,603 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 14:43:05,791 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 14:43:05,830 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 14:43:05,830 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-19 14:43:05,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:43:05 BoogieIcfgContainer [2022-01-19 14:43:05,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 14:43:05,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 14:43:05,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 14:43:05,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 14:43:05,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:43:05" (1/3) ... [2022-01-19 14:43:05,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cce8328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:43:05, skipping insertion in model container [2022-01-19 14:43:05,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:43:05" (2/3) ... [2022-01-19 14:43:05,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cce8328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:43:05, skipping insertion in model container [2022-01-19 14:43:05,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:43:05" (3/3) ... [2022-01-19 14:43:05,845 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2022-01-19 14:43:05,849 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 14:43:05,850 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 14:43:05,850 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 14:43:05,878 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,879 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,879 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,880 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,880 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,880 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,883 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,883 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,883 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,883 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,884 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,884 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,884 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,884 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,885 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,885 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,886 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,886 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,886 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,886 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,887 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,887 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,887 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,887 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,887 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,888 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,888 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,889 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,890 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,890 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,890 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,890 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,890 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,890 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,893 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,894 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,894 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,894 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,895 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,896 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,896 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,896 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:43:05,900 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-19 14:43:05,938 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 14:43:05,944 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 14:43:05,944 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-19 14:43:05,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2022-01-19 14:43:06,002 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2022-01-19 14:43:06,003 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 14:43:06,006 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2022-01-19 14:43:06,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2022-01-19 14:43:06,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2022-01-19 14:43:06,030 INFO L129 PetriNetUnfolder]: 7/82 cut-off events. [2022-01-19 14:43:06,031 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 14:43:06,033 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:06,035 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] [2022-01-19 14:43:06,035 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:06,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:06,039 INFO L85 PathProgramCache]: Analyzing trace with hash 64157928, now seen corresponding path program 1 times [2022-01-19 14:43:06,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:06,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440897006] [2022-01-19 14:43:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:06,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:06,282 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 14:43:06,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:06,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440897006] [2022-01-19 14:43:06,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440897006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:06,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:06,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 14:43:06,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345024799] [2022-01-19 14:43:06,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:06,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 14:43:06,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:06,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 14:43:06,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 14:43:06,327 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2022-01-19 14:43:06,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:06,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:06,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2022-01-19 14:43:06,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:06,420 INFO L129 PetriNetUnfolder]: 26/138 cut-off events. [2022-01-19 14:43:06,420 INFO L130 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2022-01-19 14:43:06,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 246 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2022-01-19 14:43:06,425 INFO L132 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2022-01-19 14:43:06,425 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2022-01-19 14:43:06,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 14:43:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 14:43:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2022-01-19 14:43:06,452 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2022-01-19 14:43:06,453 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2022-01-19 14:43:06,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2022-01-19 14:43:06,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:06,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2022-01-19 14:43:06,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:06,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:06,469 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:06,471 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2022-01-19 14:43:06,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2022-01-19 14:43:06,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-01-19 14:43:06,477 INFO L242 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2022-01-19 14:43:06,479 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2022-01-19 14:43:06,484 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2022-01-19 14:43:06,484 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2022-01-19 14:43:06,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:06,485 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:06,485 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] [2022-01-19 14:43:06,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 14:43:06,487 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:06,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:06,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1292779301, now seen corresponding path program 1 times [2022-01-19 14:43:06,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:06,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535994468] [2022-01-19 14:43:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:06,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:06,776 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 14:43:06,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:06,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535994468] [2022-01-19 14:43:06,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535994468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:06,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:06,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 14:43:06,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521809653] [2022-01-19 14:43:06,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:06,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 14:43:06,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:06,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 14:43:06,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 14:43:06,782 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2022-01-19 14:43:06,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 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 14:43:06,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:06,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2022-01-19 14:43:06,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:06,909 INFO L129 PetriNetUnfolder]: 34/192 cut-off events. [2022-01-19 14:43:06,910 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-01-19 14:43:06,912 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 479 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2022-01-19 14:43:06,914 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2022-01-19 14:43:06,914 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2022-01-19 14:43:06,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:43:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:43:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-01-19 14:43:06,921 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-01-19 14:43:06,921 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-01-19 14:43:06,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-01-19 14:43:06,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:06,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-01-19 14:43:06,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:06,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:06,927 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:06,928 INFO L186 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2022-01-19 14:43:06,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2022-01-19 14:43:06,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 14:43:06,931 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2022-01-19 14:43:06,931 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-01-19 14:43:06,932 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2022-01-19 14:43:06,932 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2022-01-19 14:43:06,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 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 14:43:06,933 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:06,933 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] [2022-01-19 14:43:06,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 14:43:06,933 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:06,935 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2022-01-19 14:43:06,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:06,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065959428] [2022-01-19 14:43:06,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:06,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:07,232 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 14:43:07,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:07,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065959428] [2022-01-19 14:43:07,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065959428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:07,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:07,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 14:43:07,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231585127] [2022-01-19 14:43:07,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:07,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 14:43:07,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:07,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 14:43:07,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-19 14:43:07,239 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 14:43:07,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:07,239 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:07,241 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 14:43:07,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:07,536 INFO L129 PetriNetUnfolder]: 297/760 cut-off events. [2022-01-19 14:43:07,537 INFO L130 PetriNetUnfolder]: For 129/134 co-relation queries the response was YES. [2022-01-19 14:43:07,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 760 events. 297/760 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4079 event pairs, 54 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1452. Up to 254 conditions per place. [2022-01-19 14:43:07,544 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 53 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2022-01-19 14:43:07,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 486 flow [2022-01-19 14:43:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 14:43:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 14:43:07,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 636 transitions. [2022-01-19 14:43:07,546 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8195876288659794 [2022-01-19 14:43:07,546 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 636 transitions. [2022-01-19 14:43:07,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 636 transitions. [2022-01-19 14:43:07,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:07,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 636 transitions. [2022-01-19 14:43:07,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.5) internal successors, (636), 8 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:07,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:07,550 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:07,550 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 8 states and 636 transitions. [2022-01-19 14:43:07,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 486 flow [2022-01-19 14:43:07,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-01-19 14:43:07,558 INFO L242 Difference]: Finished difference. Result has 96 places, 98 transitions, 330 flow [2022-01-19 14:43:07,558 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2022-01-19 14:43:07,560 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 10 predicate places. [2022-01-19 14:43:07,560 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 330 flow [2022-01-19 14:43:07,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:07,560 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:07,561 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] [2022-01-19 14:43:07,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 14:43:07,561 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:07,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1540254679, now seen corresponding path program 2 times [2022-01-19 14:43:07,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:07,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421099171] [2022-01-19 14:43:07,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:07,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:07,741 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 14:43:07,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:07,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421099171] [2022-01-19 14:43:07,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421099171] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:07,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:07,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:43:07,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614080827] [2022-01-19 14:43:07,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:07,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:43:07,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:43:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:43:07,746 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 14:43:07,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:07,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:07,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 14:43:07,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:07,944 INFO L129 PetriNetUnfolder]: 371/890 cut-off events. [2022-01-19 14:43:07,944 INFO L130 PetriNetUnfolder]: For 450/454 co-relation queries the response was YES. [2022-01-19 14:43:07,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 890 events. 371/890 cut-off events. For 450/454 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4800 event pairs, 71 based on Foata normal form. 18/843 useless extension candidates. Maximal degree in co-relation 2091. Up to 395 conditions per place. [2022-01-19 14:43:07,952 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 53 selfloop transitions, 21 changer transitions 2/133 dead transitions. [2022-01-19 14:43:07,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 628 flow [2022-01-19 14:43:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:43:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:43:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2022-01-19 14:43:07,954 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-01-19 14:43:07,954 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2022-01-19 14:43:07,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2022-01-19 14:43:07,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:07,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2022-01-19 14:43:07,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:07,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:07,958 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:07,958 INFO L186 Difference]: Start difference. First operand has 96 places, 98 transitions, 330 flow. Second operand 6 states and 485 transitions. [2022-01-19 14:43:07,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 628 flow [2022-01-19 14:43:07,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 14:43:07,966 INFO L242 Difference]: Finished difference. Result has 104 places, 108 transitions, 469 flow [2022-01-19 14:43:07,967 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=104, PETRI_TRANSITIONS=108} [2022-01-19 14:43:07,968 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2022-01-19 14:43:07,968 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 108 transitions, 469 flow [2022-01-19 14:43:07,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:07,968 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:07,969 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] [2022-01-19 14:43:07,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 14:43:07,969 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:07,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:07,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1923841693, now seen corresponding path program 3 times [2022-01-19 14:43:07,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:07,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140361710] [2022-01-19 14:43:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:07,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:08,144 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 14:43:08,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:08,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140361710] [2022-01-19 14:43:08,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140361710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:08,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:08,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 14:43:08,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90430235] [2022-01-19 14:43:08,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:08,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 14:43:08,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:08,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 14:43:08,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-19 14:43:08,147 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 14:43:08,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 108 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:08,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:08,148 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 14:43:08,148 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:08,504 INFO L129 PetriNetUnfolder]: 576/1343 cut-off events. [2022-01-19 14:43:08,504 INFO L130 PetriNetUnfolder]: For 998/1044 co-relation queries the response was YES. [2022-01-19 14:43:08,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3285 conditions, 1343 events. 576/1343 cut-off events. For 998/1044 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8163 event pairs, 89 based on Foata normal form. 19/1294 useless extension candidates. Maximal degree in co-relation 3269. Up to 389 conditions per place. [2022-01-19 14:43:08,518 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 70 selfloop transitions, 38 changer transitions 2/167 dead transitions. [2022-01-19 14:43:08,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 917 flow [2022-01-19 14:43:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 14:43:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 14:43:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 731 transitions. [2022-01-19 14:43:08,521 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8373424971363116 [2022-01-19 14:43:08,521 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 731 transitions. [2022-01-19 14:43:08,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 731 transitions. [2022-01-19 14:43:08,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:08,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 731 transitions. [2022-01-19 14:43:08,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.22222222222223) internal successors, (731), 9 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:08,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:08,525 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:08,525 INFO L186 Difference]: Start difference. First operand has 104 places, 108 transitions, 469 flow. Second operand 9 states and 731 transitions. [2022-01-19 14:43:08,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 917 flow [2022-01-19 14:43:08,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 871 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-01-19 14:43:08,535 INFO L242 Difference]: Finished difference. Result has 116 places, 121 transitions, 671 flow [2022-01-19 14:43:08,536 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=671, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2022-01-19 14:43:08,538 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2022-01-19 14:43:08,538 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 671 flow [2022-01-19 14:43:08,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:08,538 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:08,538 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] [2022-01-19 14:43:08,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 14:43:08,539 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:08,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:08,539 INFO L85 PathProgramCache]: Analyzing trace with hash 982794509, now seen corresponding path program 4 times [2022-01-19 14:43:08,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:08,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540274379] [2022-01-19 14:43:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:08,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:08,678 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 14:43:08,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:08,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540274379] [2022-01-19 14:43:08,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540274379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:08,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:08,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 14:43:08,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344455275] [2022-01-19 14:43:08,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:08,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 14:43:08,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:08,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 14:43:08,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-19 14:43:08,681 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 14:43:08,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 671 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:08,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:08,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 14:43:08,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:08,912 INFO L129 PetriNetUnfolder]: 594/1397 cut-off events. [2022-01-19 14:43:08,913 INFO L130 PetriNetUnfolder]: For 2230/2243 co-relation queries the response was YES. [2022-01-19 14:43:08,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3953 conditions, 1397 events. 594/1397 cut-off events. For 2230/2243 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8647 event pairs, 153 based on Foata normal form. 16/1310 useless extension candidates. Maximal degree in co-relation 3932. Up to 527 conditions per place. [2022-01-19 14:43:08,926 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 64 selfloop transitions, 37 changer transitions 2/160 dead transitions. [2022-01-19 14:43:08,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1072 flow [2022-01-19 14:43:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 14:43:08,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 14:43:08,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2022-01-19 14:43:08,929 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8234536082474226 [2022-01-19 14:43:08,929 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2022-01-19 14:43:08,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2022-01-19 14:43:08,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:08,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2022-01-19 14:43:08,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:08,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:08,933 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:08,933 INFO L186 Difference]: Start difference. First operand has 116 places, 121 transitions, 671 flow. Second operand 8 states and 639 transitions. [2022-01-19 14:43:08,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1072 flow [2022-01-19 14:43:08,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 1052 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-01-19 14:43:08,946 INFO L242 Difference]: Finished difference. Result has 124 places, 128 transitions, 818 flow [2022-01-19 14:43:08,947 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2022-01-19 14:43:08,949 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 38 predicate places. [2022-01-19 14:43:08,949 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 818 flow [2022-01-19 14:43:08,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:08,951 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:08,951 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:43:08,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 14:43:08,951 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:08,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1775458840, now seen corresponding path program 1 times [2022-01-19 14:43:08,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:08,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592710887] [2022-01-19 14:43:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:08,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:09,032 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 14:43:09,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:09,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592710887] [2022-01-19 14:43:09,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592710887] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:09,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:09,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:43:09,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157335129] [2022-01-19 14:43:09,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:09,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:43:09,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:09,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:43:09,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:43:09,038 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 14:43:09,038 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 128 transitions, 818 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:09,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:09,039 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 14:43:09,039 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:09,325 INFO L129 PetriNetUnfolder]: 836/1929 cut-off events. [2022-01-19 14:43:09,325 INFO L130 PetriNetUnfolder]: For 3921/4121 co-relation queries the response was YES. [2022-01-19 14:43:09,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5970 conditions, 1929 events. 836/1929 cut-off events. For 3921/4121 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13026 event pairs, 166 based on Foata normal form. 81/1833 useless extension candidates. Maximal degree in co-relation 5945. Up to 719 conditions per place. [2022-01-19 14:43:09,344 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 49 selfloop transitions, 41 changer transitions 0/156 dead transitions. [2022-01-19 14:43:09,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 156 transitions, 1099 flow [2022-01-19 14:43:09,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:43:09,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:43:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-01-19 14:43:09,346 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-01-19 14:43:09,346 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-01-19 14:43:09,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-01-19 14:43:09,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:09,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-01-19 14:43:09,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:09,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:09,348 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:09,349 INFO L186 Difference]: Start difference. First operand has 124 places, 128 transitions, 818 flow. Second operand 6 states and 486 transitions. [2022-01-19 14:43:09,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 156 transitions, 1099 flow [2022-01-19 14:43:09,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 156 transitions, 1035 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-01-19 14:43:09,370 INFO L242 Difference]: Finished difference. Result has 127 places, 133 transitions, 920 flow [2022-01-19 14:43:09,370 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=920, PETRI_PLACES=127, PETRI_TRANSITIONS=133} [2022-01-19 14:43:09,371 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 41 predicate places. [2022-01-19 14:43:09,371 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 133 transitions, 920 flow [2022-01-19 14:43:09,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:09,371 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:09,371 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] [2022-01-19 14:43:09,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 14:43:09,372 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:09,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2079569762, now seen corresponding path program 2 times [2022-01-19 14:43:09,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:09,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119787509] [2022-01-19 14:43:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:09,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:09,457 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 14:43:09,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:09,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119787509] [2022-01-19 14:43:09,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119787509] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:09,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:09,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:43:09,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313772121] [2022-01-19 14:43:09,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:09,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:43:09,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:09,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:43:09,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:43:09,459 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 14:43:09,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 133 transitions, 920 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:09,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:09,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 14:43:09,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:09,822 INFO L129 PetriNetUnfolder]: 996/2323 cut-off events. [2022-01-19 14:43:09,823 INFO L130 PetriNetUnfolder]: For 7235/7426 co-relation queries the response was YES. [2022-01-19 14:43:09,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8181 conditions, 2323 events. 996/2323 cut-off events. For 7235/7426 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16848 event pairs, 79 based on Foata normal form. 81/2312 useless extension candidates. Maximal degree in co-relation 8153. Up to 752 conditions per place. [2022-01-19 14:43:09,844 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 99 selfloop transitions, 74 changer transitions 2/241 dead transitions. [2022-01-19 14:43:09,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 241 transitions, 2537 flow [2022-01-19 14:43:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 14:43:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 14:43:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 411 transitions. [2022-01-19 14:43:09,846 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8474226804123711 [2022-01-19 14:43:09,846 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 411 transitions. [2022-01-19 14:43:09,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 411 transitions. [2022-01-19 14:43:09,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:09,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 411 transitions. [2022-01-19 14:43:09,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:09,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:09,848 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:09,849 INFO L186 Difference]: Start difference. First operand has 127 places, 133 transitions, 920 flow. Second operand 5 states and 411 transitions. [2022-01-19 14:43:09,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 241 transitions, 2537 flow [2022-01-19 14:43:09,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 241 transitions, 2403 flow, removed 15 selfloop flow, removed 2 redundant places. [2022-01-19 14:43:09,874 INFO L242 Difference]: Finished difference. Result has 132 places, 188 transitions, 1830 flow [2022-01-19 14:43:09,874 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1830, PETRI_PLACES=132, PETRI_TRANSITIONS=188} [2022-01-19 14:43:09,875 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 46 predicate places. [2022-01-19 14:43:09,875 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 188 transitions, 1830 flow [2022-01-19 14:43:09,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:09,875 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:09,876 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] [2022-01-19 14:43:09,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-19 14:43:09,876 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:09,876 INFO L85 PathProgramCache]: Analyzing trace with hash 823447134, now seen corresponding path program 1 times [2022-01-19 14:43:09,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:09,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84353219] [2022-01-19 14:43:09,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:09,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:43:09,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84353219] [2022-01-19 14:43:09,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84353219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:43:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506628203] [2022-01-19 14:43:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:09,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:43:09,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:43:09,992 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 14:43:10,023 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 14:43:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:10,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 14:43:10,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:43:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:43:10,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:43:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:43:11,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506628203] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:43:11,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:43:11,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-01-19 14:43:11,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103339914] [2022-01-19 14:43:11,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:43:11,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 14:43:11,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:11,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 14:43:11,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-19 14:43:11,260 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-01-19 14:43:11,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 188 transitions, 1830 flow. Second operand has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:11,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:11,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-01-19 14:43:11,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:12,084 INFO L129 PetriNetUnfolder]: 1451/3478 cut-off events. [2022-01-19 14:43:12,084 INFO L130 PetriNetUnfolder]: For 13232/13363 co-relation queries the response was YES. [2022-01-19 14:43:12,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13593 conditions, 3478 events. 1451/3478 cut-off events. For 13232/13363 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 27180 event pairs, 165 based on Foata normal form. 172/3581 useless extension candidates. Maximal degree in co-relation 13562. Up to 760 conditions per place. [2022-01-19 14:43:12,124 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 197 selfloop transitions, 110 changer transitions 10/369 dead transitions. [2022-01-19 14:43:12,124 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 369 transitions, 4117 flow [2022-01-19 14:43:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-19 14:43:12,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-01-19 14:43:12,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1089 transitions. [2022-01-19 14:43:12,127 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7484536082474227 [2022-01-19 14:43:12,127 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1089 transitions. [2022-01-19 14:43:12,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1089 transitions. [2022-01-19 14:43:12,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:12,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1089 transitions. [2022-01-19 14:43:12,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.6) internal successors, (1089), 15 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:12,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:12,133 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:12,133 INFO L186 Difference]: Start difference. First operand has 132 places, 188 transitions, 1830 flow. Second operand 15 states and 1089 transitions. [2022-01-19 14:43:12,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 369 transitions, 4117 flow [2022-01-19 14:43:12,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 369 transitions, 4115 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-01-19 14:43:12,172 INFO L242 Difference]: Finished difference. Result has 153 places, 228 transitions, 2620 flow [2022-01-19 14:43:12,172 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2620, PETRI_PLACES=153, PETRI_TRANSITIONS=228} [2022-01-19 14:43:12,173 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 67 predicate places. [2022-01-19 14:43:12,173 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 228 transitions, 2620 flow [2022-01-19 14:43:12,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:12,174 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:12,174 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] [2022-01-19 14:43:12,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 14:43:12,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:43:12,388 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:12,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:12,388 INFO L85 PathProgramCache]: Analyzing trace with hash 124335744, now seen corresponding path program 2 times [2022-01-19 14:43:12,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:12,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326446807] [2022-01-19 14:43:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:12,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:43:12,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:12,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326446807] [2022-01-19 14:43:12,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326446807] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:43:12,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784038749] [2022-01-19 14:43:12,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:43:12,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:43:12,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:43:12,584 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 14:43:12,622 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 14:43:12,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:43:12,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:43:12,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:43:12,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:43:12,868 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 14:43:12,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 14:43:12,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784038749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:12,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 14:43:12,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-01-19 14:43:12,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298380290] [2022-01-19 14:43:12,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:12,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 14:43:12,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:12,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 14:43:12,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-01-19 14:43:12,870 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-01-19 14:43:12,870 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 228 transitions, 2620 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:12,870 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:12,871 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-01-19 14:43:12,871 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:13,823 INFO L129 PetriNetUnfolder]: 2586/5598 cut-off events. [2022-01-19 14:43:13,823 INFO L130 PetriNetUnfolder]: For 25913/25913 co-relation queries the response was YES. [2022-01-19 14:43:13,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23983 conditions, 5598 events. 2586/5598 cut-off events. For 25913/25913 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46389 event pairs, 870 based on Foata normal form. 19/5496 useless extension candidates. Maximal degree in co-relation 23944. Up to 3766 conditions per place. [2022-01-19 14:43:13,888 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 180 selfloop transitions, 82 changer transitions 7/324 dead transitions. [2022-01-19 14:43:13,888 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 324 transitions, 4252 flow [2022-01-19 14:43:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 14:43:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 14:43:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 642 transitions. [2022-01-19 14:43:13,890 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273195876288659 [2022-01-19 14:43:13,890 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 642 transitions. [2022-01-19 14:43:13,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 642 transitions. [2022-01-19 14:43:13,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:13,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 642 transitions. [2022-01-19 14:43:13,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.25) internal successors, (642), 8 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:13,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:13,894 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:13,894 INFO L186 Difference]: Start difference. First operand has 153 places, 228 transitions, 2620 flow. Second operand 8 states and 642 transitions. [2022-01-19 14:43:13,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 324 transitions, 4252 flow [2022-01-19 14:43:13,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 324 transitions, 4088 flow, removed 33 selfloop flow, removed 5 redundant places. [2022-01-19 14:43:13,992 INFO L242 Difference]: Finished difference. Result has 159 places, 271 transitions, 3537 flow [2022-01-19 14:43:13,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2508, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3537, PETRI_PLACES=159, PETRI_TRANSITIONS=271} [2022-01-19 14:43:13,993 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 73 predicate places. [2022-01-19 14:43:13,993 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 271 transitions, 3537 flow [2022-01-19 14:43:13,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:13,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:13,994 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] [2022-01-19 14:43:14,023 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 14:43:14,203 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,SelfDestructingSolverStorable9 [2022-01-19 14:43:14,204 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:14,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1893633040, now seen corresponding path program 3 times [2022-01-19 14:43:14,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:14,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286509840] [2022-01-19 14:43:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:14,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:14,316 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 14:43:14,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:14,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286509840] [2022-01-19 14:43:14,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286509840] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:14,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:14,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 14:43:14,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534574097] [2022-01-19 14:43:14,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:14,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 14:43:14,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:14,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 14:43:14,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 14:43:14,318 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-01-19 14:43:14,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 271 transitions, 3537 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:14,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:14,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-01-19 14:43:14,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:15,161 INFO L129 PetriNetUnfolder]: 2587/5651 cut-off events. [2022-01-19 14:43:15,162 INFO L130 PetriNetUnfolder]: For 30144/30227 co-relation queries the response was YES. [2022-01-19 14:43:15,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25255 conditions, 5651 events. 2587/5651 cut-off events. For 30144/30227 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 46822 event pairs, 1032 based on Foata normal form. 12/5506 useless extension candidates. Maximal degree in co-relation 25212. Up to 3838 conditions per place. [2022-01-19 14:43:15,233 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 164 selfloop transitions, 75 changer transitions 1/295 dead transitions. [2022-01-19 14:43:15,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 295 transitions, 4192 flow [2022-01-19 14:43:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 14:43:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 14:43:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 403 transitions. [2022-01-19 14:43:15,235 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8309278350515464 [2022-01-19 14:43:15,235 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 403 transitions. [2022-01-19 14:43:15,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 403 transitions. [2022-01-19 14:43:15,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:15,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 403 transitions. [2022-01-19 14:43:15,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:15,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:15,238 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:15,238 INFO L186 Difference]: Start difference. First operand has 159 places, 271 transitions, 3537 flow. Second operand 5 states and 403 transitions. [2022-01-19 14:43:15,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 295 transitions, 4192 flow [2022-01-19 14:43:15,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 295 transitions, 4149 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-01-19 14:43:15,348 INFO L242 Difference]: Finished difference. Result has 164 places, 273 transitions, 3764 flow [2022-01-19 14:43:15,348 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3494, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3764, PETRI_PLACES=164, PETRI_TRANSITIONS=273} [2022-01-19 14:43:15,348 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 78 predicate places. [2022-01-19 14:43:15,349 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 273 transitions, 3764 flow [2022-01-19 14:43:15,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:15,349 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:15,349 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] [2022-01-19 14:43:15,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-19 14:43:15,349 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:15,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:15,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1885417408, now seen corresponding path program 3 times [2022-01-19 14:43:15,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:15,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550360264] [2022-01-19 14:43:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:15,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:15,455 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 14:43:15,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:15,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550360264] [2022-01-19 14:43:15,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550360264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:15,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:15,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:43:15,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329560455] [2022-01-19 14:43:15,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:15,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:43:15,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:15,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:43:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:43:15,457 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 14:43:15,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 273 transitions, 3764 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:15,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:15,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 14:43:15,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:16,280 INFO L129 PetriNetUnfolder]: 2293/5624 cut-off events. [2022-01-19 14:43:16,280 INFO L130 PetriNetUnfolder]: For 30705/31223 co-relation queries the response was YES. [2022-01-19 14:43:16,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24668 conditions, 5624 events. 2293/5624 cut-off events. For 30705/31223 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 50519 event pairs, 309 based on Foata normal form. 82/5549 useless extension candidates. Maximal degree in co-relation 24623. Up to 2011 conditions per place. [2022-01-19 14:43:16,352 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 101 selfloop transitions, 199 changer transitions 2/376 dead transitions. [2022-01-19 14:43:16,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 376 transitions, 5527 flow [2022-01-19 14:43:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:43:16,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:43:16,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 497 transitions. [2022-01-19 14:43:16,354 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539518900343642 [2022-01-19 14:43:16,354 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 497 transitions. [2022-01-19 14:43:16,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 497 transitions. [2022-01-19 14:43:16,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:16,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 497 transitions. [2022-01-19 14:43:16,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:16,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:16,356 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:16,356 INFO L186 Difference]: Start difference. First operand has 164 places, 273 transitions, 3764 flow. Second operand 6 states and 497 transitions. [2022-01-19 14:43:16,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 376 transitions, 5527 flow [2022-01-19 14:43:16,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 376 transitions, 5446 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-19 14:43:16,455 INFO L242 Difference]: Finished difference. Result has 170 places, 333 transitions, 5068 flow [2022-01-19 14:43:16,455 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3689, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5068, PETRI_PLACES=170, PETRI_TRANSITIONS=333} [2022-01-19 14:43:16,456 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 84 predicate places. [2022-01-19 14:43:16,456 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 333 transitions, 5068 flow [2022-01-19 14:43:16,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:16,457 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:16,457 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] [2022-01-19 14:43:16,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-19 14:43:16,457 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:16,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:16,457 INFO L85 PathProgramCache]: Analyzing trace with hash 20413346, now seen corresponding path program 4 times [2022-01-19 14:43:16,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:16,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927937140] [2022-01-19 14:43:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:16,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:16,609 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 14:43:16,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:16,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927937140] [2022-01-19 14:43:16,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927937140] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:16,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:16,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:43:16,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103252691] [2022-01-19 14:43:16,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:16,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:43:16,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:16,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:43:16,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:43:16,611 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 14:43:16,611 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 333 transitions, 5068 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:16,611 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:16,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 14:43:16,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:17,332 INFO L129 PetriNetUnfolder]: 2118/5578 cut-off events. [2022-01-19 14:43:17,333 INFO L130 PetriNetUnfolder]: For 39697/40209 co-relation queries the response was YES. [2022-01-19 14:43:17,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26399 conditions, 5578 events. 2118/5578 cut-off events. For 39697/40209 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 52132 event pairs, 307 based on Foata normal form. 70/5484 useless extension candidates. Maximal degree in co-relation 26351. Up to 1847 conditions per place. [2022-01-19 14:43:17,394 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 102 selfloop transitions, 213 changer transitions 8/397 dead transitions. [2022-01-19 14:43:17,394 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 397 transitions, 6532 flow [2022-01-19 14:43:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:43:17,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:43:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-01-19 14:43:17,396 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-01-19 14:43:17,396 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-01-19 14:43:17,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-01-19 14:43:17,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:17,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-01-19 14:43:17,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:17,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:17,399 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:17,399 INFO L186 Difference]: Start difference. First operand has 170 places, 333 transitions, 5068 flow. Second operand 6 states and 493 transitions. [2022-01-19 14:43:17,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 397 transitions, 6532 flow [2022-01-19 14:43:17,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 397 transitions, 6502 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-01-19 14:43:17,539 INFO L242 Difference]: Finished difference. Result has 177 places, 352 transitions, 5898 flow [2022-01-19 14:43:17,539 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4994, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5898, PETRI_PLACES=177, PETRI_TRANSITIONS=352} [2022-01-19 14:43:17,539 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 91 predicate places. [2022-01-19 14:43:17,540 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 352 transitions, 5898 flow [2022-01-19 14:43:17,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:17,540 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:17,540 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] [2022-01-19 14:43:17,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-19 14:43:17,540 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:17,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:17,541 INFO L85 PathProgramCache]: Analyzing trace with hash 620855476, now seen corresponding path program 5 times [2022-01-19 14:43:17,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:17,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189795492] [2022-01-19 14:43:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:17,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:43:17,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:17,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189795492] [2022-01-19 14:43:17,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189795492] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:43:17,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743563133] [2022-01-19 14:43:17,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:43:17,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:43:17,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:43:17,660 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 14:43:17,661 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 14:43:17,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:43:17,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:43:17,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:43:17,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:43:18,081 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 14:43:18,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 14:43:18,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743563133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:18,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 14:43:18,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-01-19 14:43:18,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205305420] [2022-01-19 14:43:18,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:18,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 14:43:18,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:18,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 14:43:18,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-19 14:43:18,083 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-01-19 14:43:18,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 352 transitions, 5898 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:18,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:18,084 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-01-19 14:43:18,084 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:19,156 INFO L129 PetriNetUnfolder]: 3277/7199 cut-off events. [2022-01-19 14:43:19,157 INFO L130 PetriNetUnfolder]: For 62000/62000 co-relation queries the response was YES. [2022-01-19 14:43:19,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37679 conditions, 7199 events. 3277/7199 cut-off events. For 62000/62000 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 63126 event pairs, 948 based on Foata normal form. 39/7115 useless extension candidates. Maximal degree in co-relation 37628. Up to 4843 conditions per place. [2022-01-19 14:43:19,359 INFO L132 encePairwiseOnDemand]: 86/97 looper letters, 256 selfloop transitions, 108 changer transitions 9/428 dead transitions. [2022-01-19 14:43:19,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 428 transitions, 7523 flow [2022-01-19 14:43:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 14:43:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 14:43:19,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 716 transitions. [2022-01-19 14:43:19,476 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8201603665521191 [2022-01-19 14:43:19,476 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 716 transitions. [2022-01-19 14:43:19,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 716 transitions. [2022-01-19 14:43:19,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:19,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 716 transitions. [2022-01-19 14:43:19,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.55555555555556) internal successors, (716), 9 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:19,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:19,479 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:19,479 INFO L186 Difference]: Start difference. First operand has 177 places, 352 transitions, 5898 flow. Second operand 9 states and 716 transitions. [2022-01-19 14:43:19,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 428 transitions, 7523 flow [2022-01-19 14:43:19,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 428 transitions, 7499 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-01-19 14:43:19,707 INFO L242 Difference]: Finished difference. Result has 189 places, 378 transitions, 6637 flow [2022-01-19 14:43:19,707 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=5878, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6637, PETRI_PLACES=189, PETRI_TRANSITIONS=378} [2022-01-19 14:43:19,707 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 103 predicate places. [2022-01-19 14:43:19,707 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 378 transitions, 6637 flow [2022-01-19 14:43:19,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:19,708 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:19,708 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] [2022-01-19 14:43:19,724 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 14:43:19,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:43:19,908 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:19,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1277185608, now seen corresponding path program 4 times [2022-01-19 14:43:19,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:19,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12873866] [2022-01-19 14:43:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:19,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:19,976 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 14:43:19,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:19,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12873866] [2022-01-19 14:43:19,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12873866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:19,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:19,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:43:19,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200176655] [2022-01-19 14:43:19,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:19,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:43:19,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:19,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:43:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:43:19,978 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 14:43:19,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 378 transitions, 6637 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:19,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:19,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 14:43:19,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:20,740 INFO L129 PetriNetUnfolder]: 2135/5356 cut-off events. [2022-01-19 14:43:20,740 INFO L130 PetriNetUnfolder]: For 54730/54890 co-relation queries the response was YES. [2022-01-19 14:43:20,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29082 conditions, 5356 events. 2135/5356 cut-off events. For 54730/54890 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 48142 event pairs, 658 based on Foata normal form. 108/5291 useless extension candidates. Maximal degree in co-relation 29026. Up to 3210 conditions per place. [2022-01-19 14:43:20,795 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 275 selfloop transitions, 63 changer transitions 6/407 dead transitions. [2022-01-19 14:43:20,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 407 transitions, 7506 flow [2022-01-19 14:43:20,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:43:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:43:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2022-01-19 14:43:20,797 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2022-01-19 14:43:20,797 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2022-01-19 14:43:20,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2022-01-19 14:43:20,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:20,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2022-01-19 14:43:20,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:20,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:20,800 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:20,800 INFO L186 Difference]: Start difference. First operand has 189 places, 378 transitions, 6637 flow. Second operand 6 states and 476 transitions. [2022-01-19 14:43:20,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 407 transitions, 7506 flow [2022-01-19 14:43:21,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 407 transitions, 7348 flow, removed 39 selfloop flow, removed 2 redundant places. [2022-01-19 14:43:21,062 INFO L242 Difference]: Finished difference. Result has 195 places, 368 transitions, 6376 flow [2022-01-19 14:43:21,062 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6376, PETRI_PLACES=195, PETRI_TRANSITIONS=368} [2022-01-19 14:43:21,063 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 109 predicate places. [2022-01-19 14:43:21,063 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 368 transitions, 6376 flow [2022-01-19 14:43:21,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:21,063 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:21,064 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:43:21,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-19 14:43:21,064 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:21,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:21,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1504437282, now seen corresponding path program 6 times [2022-01-19 14:43:21,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:21,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852186190] [2022-01-19 14:43:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:21,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:21,165 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 14:43:21,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:21,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852186190] [2022-01-19 14:43:21,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852186190] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:21,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:21,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:43:21,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781036405] [2022-01-19 14:43:21,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:21,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:43:21,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:21,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:43:21,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:43:21,168 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 14:43:21,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 368 transitions, 6376 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:21,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:21,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 14:43:21,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:22,069 INFO L129 PetriNetUnfolder]: 2291/5559 cut-off events. [2022-01-19 14:43:22,069 INFO L130 PetriNetUnfolder]: For 53061/53664 co-relation queries the response was YES. [2022-01-19 14:43:22,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29823 conditions, 5559 events. 2291/5559 cut-off events. For 53061/53664 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 49667 event pairs, 249 based on Foata normal form. 127/5531 useless extension candidates. Maximal degree in co-relation 29763. Up to 1798 conditions per place. [2022-01-19 14:43:22,133 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 152 selfloop transitions, 195 changer transitions 4/423 dead transitions. [2022-01-19 14:43:22,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 423 transitions, 7783 flow [2022-01-19 14:43:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 14:43:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 14:43:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2022-01-19 14:43:22,136 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8577319587628865 [2022-01-19 14:43:22,136 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2022-01-19 14:43:22,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2022-01-19 14:43:22,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:22,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2022-01-19 14:43:22,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:22,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:22,139 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:22,139 INFO L186 Difference]: Start difference. First operand has 195 places, 368 transitions, 6376 flow. Second operand 5 states and 416 transitions. [2022-01-19 14:43:22,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 423 transitions, 7783 flow [2022-01-19 14:43:22,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 423 transitions, 7627 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-01-19 14:43:22,313 INFO L242 Difference]: Finished difference. Result has 198 places, 384 transitions, 7213 flow [2022-01-19 14:43:22,313 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6209, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7213, PETRI_PLACES=198, PETRI_TRANSITIONS=384} [2022-01-19 14:43:22,314 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 112 predicate places. [2022-01-19 14:43:22,314 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 384 transitions, 7213 flow [2022-01-19 14:43:22,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:22,314 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:22,314 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] [2022-01-19 14:43:22,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-19 14:43:22,314 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:22,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:22,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2008782444, now seen corresponding path program 7 times [2022-01-19 14:43:22,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:22,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980482997] [2022-01-19 14:43:22,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:22,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:22,400 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 14:43:22,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:22,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980482997] [2022-01-19 14:43:22,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980482997] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:22,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:22,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:43:22,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380207157] [2022-01-19 14:43:22,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:22,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:43:22,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:43:22,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:43:22,403 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 14:43:22,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 384 transitions, 7213 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:22,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:22,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 14:43:22,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:23,610 INFO L129 PetriNetUnfolder]: 2808/6674 cut-off events. [2022-01-19 14:43:23,611 INFO L130 PetriNetUnfolder]: For 76261/76441 co-relation queries the response was YES. [2022-01-19 14:43:23,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37474 conditions, 6674 events. 2808/6674 cut-off events. For 76261/76441 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 60870 event pairs, 801 based on Foata normal form. 70/6555 useless extension candidates. Maximal degree in co-relation 37413. Up to 4100 conditions per place. [2022-01-19 14:43:23,681 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 326 selfloop transitions, 75 changer transitions 3/475 dead transitions. [2022-01-19 14:43:23,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 475 transitions, 9561 flow [2022-01-19 14:43:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:43:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:43:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 487 transitions. [2022-01-19 14:43:23,683 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8367697594501718 [2022-01-19 14:43:23,683 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 487 transitions. [2022-01-19 14:43:23,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 487 transitions. [2022-01-19 14:43:23,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:23,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 487 transitions. [2022-01-19 14:43:23,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.16666666666667) internal successors, (487), 6 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:23,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:23,685 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:23,685 INFO L186 Difference]: Start difference. First operand has 198 places, 384 transitions, 7213 flow. Second operand 6 states and 487 transitions. [2022-01-19 14:43:23,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 475 transitions, 9561 flow [2022-01-19 14:43:23,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 475 transitions, 9114 flow, removed 13 selfloop flow, removed 6 redundant places. [2022-01-19 14:43:23,912 INFO L242 Difference]: Finished difference. Result has 198 places, 399 transitions, 7385 flow [2022-01-19 14:43:23,913 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7385, PETRI_PLACES=198, PETRI_TRANSITIONS=399} [2022-01-19 14:43:23,913 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 112 predicate places. [2022-01-19 14:43:23,913 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 399 transitions, 7385 flow [2022-01-19 14:43:23,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:23,913 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:23,914 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] [2022-01-19 14:43:23,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-19 14:43:23,914 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:23,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:23,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1727722086, now seen corresponding path program 8 times [2022-01-19 14:43:23,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:23,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859839493] [2022-01-19 14:43:23,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:23,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:23,964 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 14:43:23,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:23,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859839493] [2022-01-19 14:43:23,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859839493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:23,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:23,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:43:23,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139168122] [2022-01-19 14:43:23,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:23,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:43:23,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:23,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:43:23,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:43:23,966 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 14:43:23,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 399 transitions, 7385 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:23,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:23,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 14:43:23,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:25,230 INFO L129 PetriNetUnfolder]: 2775/6460 cut-off events. [2022-01-19 14:43:25,230 INFO L130 PetriNetUnfolder]: For 73749/73919 co-relation queries the response was YES. [2022-01-19 14:43:25,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36509 conditions, 6460 events. 2775/6460 cut-off events. For 73749/73919 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 57894 event pairs, 799 based on Foata normal form. 54/6334 useless extension candidates. Maximal degree in co-relation 36450. Up to 4237 conditions per place. [2022-01-19 14:43:25,287 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 264 selfloop transitions, 73 changer transitions 6/414 dead transitions. [2022-01-19 14:43:25,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 414 transitions, 8153 flow [2022-01-19 14:43:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:43:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:43:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 470 transitions. [2022-01-19 14:43:25,288 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8075601374570447 [2022-01-19 14:43:25,288 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 470 transitions. [2022-01-19 14:43:25,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 470 transitions. [2022-01-19 14:43:25,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:25,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 470 transitions. [2022-01-19 14:43:25,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.33333333333333) internal successors, (470), 6 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:25,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:25,291 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:25,291 INFO L186 Difference]: Start difference. First operand has 198 places, 399 transitions, 7385 flow. Second operand 6 states and 470 transitions. [2022-01-19 14:43:25,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 414 transitions, 8153 flow [2022-01-19 14:43:25,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 414 transitions, 8089 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-19 14:43:25,456 INFO L242 Difference]: Finished difference. Result has 203 places, 398 transitions, 7406 flow [2022-01-19 14:43:25,457 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7203, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7406, PETRI_PLACES=203, PETRI_TRANSITIONS=398} [2022-01-19 14:43:25,457 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 117 predicate places. [2022-01-19 14:43:25,457 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 398 transitions, 7406 flow [2022-01-19 14:43:25,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:25,458 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:25,458 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] [2022-01-19 14:43:25,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-19 14:43:25,458 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:25,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1741852028, now seen corresponding path program 9 times [2022-01-19 14:43:25,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:25,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667139777] [2022-01-19 14:43:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:25,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:25,550 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 14:43:25,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:25,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667139777] [2022-01-19 14:43:25,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667139777] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:43:25,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:43:25,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:43:25,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751202434] [2022-01-19 14:43:25,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:43:25,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:43:25,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:25,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:43:25,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:43:25,552 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 14:43:25,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 398 transitions, 7406 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:25,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:25,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 14:43:25,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:26,792 INFO L129 PetriNetUnfolder]: 2756/6325 cut-off events. [2022-01-19 14:43:26,792 INFO L130 PetriNetUnfolder]: For 77953/78126 co-relation queries the response was YES. [2022-01-19 14:43:26,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36374 conditions, 6325 events. 2756/6325 cut-off events. For 77953/78126 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 55857 event pairs, 836 based on Foata normal form. 57/6173 useless extension candidates. Maximal degree in co-relation 36313. Up to 4241 conditions per place. [2022-01-19 14:43:26,849 INFO L132 encePairwiseOnDemand]: 90/97 looper letters, 253 selfloop transitions, 76 changer transitions 3/403 dead transitions. [2022-01-19 14:43:26,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 403 transitions, 7974 flow [2022-01-19 14:43:26,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 14:43:26,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 14:43:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 398 transitions. [2022-01-19 14:43:26,851 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8206185567010309 [2022-01-19 14:43:26,851 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 398 transitions. [2022-01-19 14:43:26,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 398 transitions. [2022-01-19 14:43:26,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:26,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 398 transitions. [2022-01-19 14:43:26,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:26,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:26,853 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:26,853 INFO L186 Difference]: Start difference. First operand has 203 places, 398 transitions, 7406 flow. Second operand 5 states and 398 transitions. [2022-01-19 14:43:26,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 403 transitions, 7974 flow [2022-01-19 14:43:27,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 403 transitions, 7675 flow, removed 23 selfloop flow, removed 9 redundant places. [2022-01-19 14:43:27,026 INFO L242 Difference]: Finished difference. Result has 197 places, 390 transitions, 7103 flow [2022-01-19 14:43:27,026 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6835, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7103, PETRI_PLACES=197, PETRI_TRANSITIONS=390} [2022-01-19 14:43:27,027 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 111 predicate places. [2022-01-19 14:43:27,027 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 390 transitions, 7103 flow [2022-01-19 14:43:27,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:27,027 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:27,027 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] [2022-01-19 14:43:27,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-19 14:43:27,027 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2069702826, now seen corresponding path program 1 times [2022-01-19 14:43:27,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:27,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439898779] [2022-01-19 14:43:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:27,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:43:27,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:27,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439898779] [2022-01-19 14:43:27,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439898779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:43:27,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607986057] [2022-01-19 14:43:27,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:27,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:43:27,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:43:27,168 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 14:43:27,171 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 14:43:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:27,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-19 14:43:27,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:43:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:43:27,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:43:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:43:28,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607986057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:43:28,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:43:28,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 16 [2022-01-19 14:43:28,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794079570] [2022-01-19 14:43:28,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:43:28,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 14:43:28,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:28,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 14:43:28,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-19 14:43:28,860 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-01-19 14:43:28,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 390 transitions, 7103 flow. Second operand has 16 states, 16 states have (on average 67.3125) internal successors, (1077), 16 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:28,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:28,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-01-19 14:43:28,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:29,985 INFO L129 PetriNetUnfolder]: 2379/6531 cut-off events. [2022-01-19 14:43:29,985 INFO L130 PetriNetUnfolder]: For 77316/77938 co-relation queries the response was YES. [2022-01-19 14:43:30,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36000 conditions, 6531 events. 2379/6531 cut-off events. For 77316/77938 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 63821 event pairs, 282 based on Foata normal form. 252/6634 useless extension candidates. Maximal degree in co-relation 35943. Up to 2576 conditions per place. [2022-01-19 14:43:30,166 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 246 selfloop transitions, 317 changer transitions 6/645 dead transitions. [2022-01-19 14:43:30,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 645 transitions, 12563 flow [2022-01-19 14:43:30,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-19 14:43:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-01-19 14:43:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 928 transitions. [2022-01-19 14:43:30,168 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7359238699444886 [2022-01-19 14:43:30,168 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 928 transitions. [2022-01-19 14:43:30,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 928 transitions. [2022-01-19 14:43:30,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:30,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 928 transitions. [2022-01-19 14:43:30,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 71.38461538461539) internal successors, (928), 13 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:30,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:30,174 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:30,174 INFO L186 Difference]: Start difference. First operand has 197 places, 390 transitions, 7103 flow. Second operand 13 states and 928 transitions. [2022-01-19 14:43:30,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 645 transitions, 12563 flow [2022-01-19 14:43:30,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 645 transitions, 12373 flow, removed 12 selfloop flow, removed 7 redundant places. [2022-01-19 14:43:30,341 INFO L242 Difference]: Finished difference. Result has 202 places, 536 transitions, 10308 flow [2022-01-19 14:43:30,342 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6913, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10308, PETRI_PLACES=202, PETRI_TRANSITIONS=536} [2022-01-19 14:43:30,342 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 116 predicate places. [2022-01-19 14:43:30,342 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 536 transitions, 10308 flow [2022-01-19 14:43:30,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.3125) internal successors, (1077), 16 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:30,343 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:30,343 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] [2022-01-19 14:43:30,363 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 14:43:30,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:43:30,549 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:30,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1920456064, now seen corresponding path program 2 times [2022-01-19 14:43:30,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:30,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813086918] [2022-01-19 14:43:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:30,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:43:30,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813086918] [2022-01-19 14:43:30,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813086918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:43:30,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425933910] [2022-01-19 14:43:30,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:43:30,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:43:30,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:43:30,714 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 14:43:30,738 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 14:43:30,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:43:30,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:43:30,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 14:43:30,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:43:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:43:31,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:43:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:43:35,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425933910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:43:35,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:43:35,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2022-01-19 14:43:35,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110685496] [2022-01-19 14:43:35,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:43:35,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:43:35,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:43:35,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:43:35,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:43:35,083 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2022-01-19 14:43:35,085 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 536 transitions, 10308 flow. Second operand has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:35,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:43:35,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2022-01-19 14:43:35,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:43:37,333 INFO L129 PetriNetUnfolder]: 4094/10933 cut-off events. [2022-01-19 14:43:37,334 INFO L130 PetriNetUnfolder]: For 125497/125753 co-relation queries the response was YES. [2022-01-19 14:43:37,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62444 conditions, 10933 events. 4094/10933 cut-off events. For 125497/125753 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 116416 event pairs, 302 based on Foata normal form. 165/10910 useless extension candidates. Maximal degree in co-relation 62385. Up to 3256 conditions per place. [2022-01-19 14:43:37,440 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 364 selfloop transitions, 448 changer transitions 9/881 dead transitions. [2022-01-19 14:43:37,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 881 transitions, 17699 flow [2022-01-19 14:43:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 14:43:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 14:43:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1262 transitions. [2022-01-19 14:43:37,443 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.722794959908362 [2022-01-19 14:43:37,443 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1262 transitions. [2022-01-19 14:43:37,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1262 transitions. [2022-01-19 14:43:37,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:43:37,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1262 transitions. [2022-01-19 14:43:37,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 70.11111111111111) internal successors, (1262), 18 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:37,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 97.0) internal successors, (1843), 19 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:37,448 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 97.0) internal successors, (1843), 19 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:37,449 INFO L186 Difference]: Start difference. First operand has 202 places, 536 transitions, 10308 flow. Second operand 18 states and 1262 transitions. [2022-01-19 14:43:37,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 881 transitions, 17699 flow [2022-01-19 14:43:37,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 881 transitions, 17168 flow, removed 230 selfloop flow, removed 4 redundant places. [2022-01-19 14:43:37,873 INFO L242 Difference]: Finished difference. Result has 218 places, 654 transitions, 13234 flow [2022-01-19 14:43:37,873 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=9841, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13234, PETRI_PLACES=218, PETRI_TRANSITIONS=654} [2022-01-19 14:43:37,874 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 132 predicate places. [2022-01-19 14:43:37,874 INFO L470 AbstractCegarLoop]: Abstraction has has 218 places, 654 transitions, 13234 flow [2022-01-19 14:43:37,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:43:37,874 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:43:37,874 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] [2022-01-19 14:43:37,890 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 14:43:38,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:43:38,076 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 14:43:38,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:43:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2081286502, now seen corresponding path program 3 times [2022-01-19 14:43:38,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:43:38,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202094810] [2022-01-19 14:43:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:43:38,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:43:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:43:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:43:38,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:43:38,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202094810] [2022-01-19 14:43:38,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202094810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:43:38,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803183392] [2022-01-19 14:43:38,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:43:38,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:43:38,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:43:38,264 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 14:43:38,265 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 14:43:38,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 14:43:38,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:43:38,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 14:43:38,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:43:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:43:38,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-01-19 14:57:13,713 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-19 14:57:13,715 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-01-19 14:57:13,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 14:57:13,732 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 14:57:13,732 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 14:57:13,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:57:13,924 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 31ms.. [2022-01-19 14:57:13,925 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-19 14:57:13,925 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-19 14:57:13,925 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-19 14:57:13,928 INFO L732 BasicCegarLoop]: Path program histogram: [9, 4, 4, 3, 1, 1] [2022-01-19 14:57:13,929 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 14:57:13,930 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 14:57:13,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 02:57:13 BasicIcfg [2022-01-19 14:57:13,931 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 14:57:13,932 INFO L158 Benchmark]: Toolchain (without parser) took 848757.49ms. Allocated memory was 383.8MB in the beginning and 7.9GB in the end (delta: 7.5GB). Free memory was 325.7MB in the beginning and 5.7GB in the end (delta: -5.3GB). Peak memory consumption was 2.3GB. Max. memory is 16.0GB. [2022-01-19 14:57:13,932 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 383.8MB. Free memory is still 342.7MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 14:57:13,932 INFO L158 Benchmark]: CACSL2BoogieTranslator took 219.40ms. Allocated memory was 383.8MB in the beginning and 511.7MB in the end (delta: 127.9MB). Free memory was 325.5MB in the beginning and 480.3MB in the end (delta: -154.7MB). Peak memory consumption was 6.4MB. Max. memory is 16.0GB. [2022-01-19 14:57:13,932 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.39ms. Allocated memory is still 511.7MB. Free memory was 480.3MB in the beginning and 479.3MB in the end (delta: 969.0kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 14:57:13,933 INFO L158 Benchmark]: Boogie Preprocessor took 19.55ms. Allocated memory is still 511.7MB. Free memory was 479.3MB in the beginning and 477.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 14:57:13,933 INFO L158 Benchmark]: RCFGBuilder took 382.17ms. Allocated memory is still 511.7MB. Free memory was 477.2MB in the beginning and 460.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2022-01-19 14:57:13,933 INFO L158 Benchmark]: TraceAbstraction took 848096.73ms. Allocated memory was 511.7MB in the beginning and 7.9GB in the end (delta: 7.4GB). Free memory was 459.4MB in the beginning and 5.7GB in the end (delta: -5.2GB). Peak memory consumption was 2.3GB. Max. memory is 16.0GB. [2022-01-19 14:57:13,934 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 383.8MB. Free memory is still 342.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 219.40ms. Allocated memory was 383.8MB in the beginning and 511.7MB in the end (delta: 127.9MB). Free memory was 325.5MB in the beginning and 480.3MB in the end (delta: -154.7MB). Peak memory consumption was 6.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.39ms. Allocated memory is still 511.7MB. Free memory was 480.3MB in the beginning and 479.3MB in the end (delta: 969.0kB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 19.55ms. Allocated memory is still 511.7MB. Free memory was 479.3MB in the beginning and 477.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 382.17ms. Allocated memory is still 511.7MB. Free memory was 477.2MB in the beginning and 460.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 848096.73ms. Allocated memory was 511.7MB in the beginning and 7.9GB in the end (delta: 7.4GB). Free memory was 459.4MB in the beginning and 5.7GB in the end (delta: -5.2GB). Peak memory consumption was 2.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 31ms.. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 31ms.. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 31ms.. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 31ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 113 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 848.0s, OverallIterations: 22, TraceHistogramMax: 1, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 19.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 967 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 967 mSDsluCounter, 899 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 144 IncrementalHoareTripleChecker+Unchecked, 1385 mSDsCounter, 145 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2812 IncrementalHoareTripleChecker+Invalid, 3101 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 145 mSolverCounterUnsat, 237 mSDtfsCounter, 2812 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 781 GetRequests, 599 SyntacticMatches, 10 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13234occurred in iteration=21, InterpolantAutomatonStates: 158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 9.8s InterpolantComputationTime, 1896 NumberOfCodeBlocks, 1896 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 2090 ConstructedInterpolants, 27 QuantifiedInterpolants, 15204 SizeOfPredicates, 32 NumberOfNonLiveVariables, 970 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 29 InterpolantComputations, 18 PerfectInterpolantSequences, 16/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown