/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-Before.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 08:08:58,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 08:08:58,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 08:08:58,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 08:08:58,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 08:08:58,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 08:08:58,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 08:08:58,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 08:08:58,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 08:08:58,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 08:08:58,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 08:08:58,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 08:08:58,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 08:08:58,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 08:08:58,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 08:08:58,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 08:08:58,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 08:08:58,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 08:08:58,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 08:08:58,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 08:08:58,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 08:08:58,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 08:08:58,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 08:08:58,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 08:08:58,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 08:08:58,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 08:08:58,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 08:08:58,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 08:08:58,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 08:08:58,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 08:08:58,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 08:08:58,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 08:08:58,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 08:08:58,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 08:08:58,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 08:08:58,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 08:08:58,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 08:08:58,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 08:08:58,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 08:08:58,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 08:08:58,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 08:08:58,116 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-Before.epf [2022-01-19 08:08:58,137 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 08:08:58,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 08:08:58,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 08:08:58,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 08:08:58,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 08:08:58,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 08:08:58,138 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 08:08:58,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 08:08:58,138 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 08:08:58,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 08:08:58,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 08:08:58,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 08:08:58,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 08:08:58,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 08:08:58,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 08:08:58,156 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 08:08:58,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 08:08:58,156 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 08:08:58,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 08:08:58,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 08:08:58,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 08:08:58,157 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 08:08:58,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 08:08:58,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:08:58,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 08:08:58,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 08:08:58,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 08:08:58,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 08:08:58,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 08:08:58,157 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 08:08:58,157 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 08:08:58,157 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 08:08:58,158 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 08:08:58,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 08:08:58,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 08:08:58,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 08:08:58,293 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 08:08:58,294 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 08:08:58,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2022-01-19 08:08:58,325 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2e32fde3/7e7e267df10744bba6ef6944e94b26e6/FLAGfb212a5ce [2022-01-19 08:08:58,683 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 08:08:58,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2022-01-19 08:08:58,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2e32fde3/7e7e267df10744bba6ef6944e94b26e6/FLAGfb212a5ce [2022-01-19 08:08:59,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2e32fde3/7e7e267df10744bba6ef6944e94b26e6 [2022-01-19 08:08:59,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 08:08:59,138 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 08:08:59,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 08:08:59,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 08:08:59,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 08:08:59,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:08:59" (1/1) ... [2022-01-19 08:08:59,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6968ea91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:08:59, skipping insertion in model container [2022-01-19 08:08:59,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:08:59" (1/1) ... [2022-01-19 08:08:59,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 08:08:59,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 08:08:59,333 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-figure3.wvr.c[2121,2134] [2022-01-19 08:08:59,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:08:59,341 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 08:08:59,365 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-figure3.wvr.c[2121,2134] [2022-01-19 08:08:59,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:08:59,378 INFO L208 MainTranslator]: Completed translation [2022-01-19 08:08:59,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:08:59 WrapperNode [2022-01-19 08:08:59,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 08:08:59,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 08:08:59,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 08:08:59,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 08:08:59,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:08:59" (1/1) ... [2022-01-19 08:08:59,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:08:59" (1/1) ... [2022-01-19 08:08:59,405 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-01-19 08:08:59,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 08:08:59,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 08:08:59,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 08:08:59,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 08:08:59,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:08:59" (1/1) ... [2022-01-19 08:08:59,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:08:59" (1/1) ... [2022-01-19 08:08:59,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:08:59" (1/1) ... [2022-01-19 08:08:59,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:08:59" (1/1) ... [2022-01-19 08:08:59,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:08:59" (1/1) ... [2022-01-19 08:08:59,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:08:59" (1/1) ... [2022-01-19 08:08:59,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:08:59" (1/1) ... [2022-01-19 08:08:59,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 08:08:59,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 08:08:59,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 08:08:59,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 08:08:59,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:08:59" (1/1) ... [2022-01-19 08:08:59,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:08:59,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:08:59,464 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 08:08:59,482 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 08:08:59,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 08:08:59,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 08:08:59,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 08:08:59,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 08:08:59,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 08:08:59,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 08:08:59,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 08:08:59,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 08:08:59,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 08:08:59,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 08:08:59,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 08:08:59,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 08:08:59,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 08:08:59,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 08:08:59,502 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 08:08:59,548 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 08:08:59,549 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 08:08:59,657 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 08:08:59,675 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 08:08:59,675 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 08:08:59,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:08:59 BoogieIcfgContainer [2022-01-19 08:08:59,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 08:08:59,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 08:08:59,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 08:08:59,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 08:08:59,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 08:08:59" (1/3) ... [2022-01-19 08:08:59,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9ae895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:08:59, skipping insertion in model container [2022-01-19 08:08:59,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:08:59" (2/3) ... [2022-01-19 08:08:59,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9ae895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:08:59, skipping insertion in model container [2022-01-19 08:08:59,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:08:59" (3/3) ... [2022-01-19 08:08:59,684 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-01-19 08:08:59,687 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 08:08:59,687 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 08:08:59,687 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 08:08:59,721 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,722 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,722 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,722 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,723 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,724 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,725 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,725 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,725 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,726 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,726 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,726 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,726 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,726 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,727 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,727 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,731 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,731 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,732 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,732 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,732 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,732 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,732 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,733 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,733 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,735 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,735 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,735 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,735 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,735 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,735 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,736 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,736 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,737 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,737 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,737 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,737 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,737 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,737 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,738 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,738 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,738 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,739 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,760 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,760 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,760 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,760 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,761 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,761 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,761 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,761 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,761 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,762 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:08:59,767 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 08:08:59,796 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 08:08:59,802 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 08:08:59,802 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 08:08:59,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-01-19 08:08:59,838 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2022-01-19 08:08:59,838 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:08:59,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-01-19 08:08:59,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-01-19 08:08:59,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-01-19 08:08:59,856 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2022-01-19 08:08:59,856 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:08:59,856 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:08:59,857 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:08:59,857 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:08:59,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:08:59,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1603327647, now seen corresponding path program 1 times [2022-01-19 08:08:59,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:08:59,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999025639] [2022-01-19 08:08:59,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:08:59,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:08:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:08:59,973 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 08:08:59,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:08:59,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999025639] [2022-01-19 08:08:59,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999025639] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:08:59,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:08:59,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 08:08:59,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388816061] [2022-01-19 08:08:59,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:08:59,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 08:08:59,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:08:59,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 08:08:59,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 08:09:00,005 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 87 [2022-01-19 08:09:00,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:00,009 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:00,009 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 87 [2022-01-19 08:09:00,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:00,051 INFO L129 PetriNetUnfolder]: 5/83 cut-off events. [2022-01-19 08:09:00,051 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-01-19 08:09:00,052 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 83 events. 5/83 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 1 based on Foata normal form. 8/85 useless extension candidates. Maximal degree in co-relation 49. Up to 10 conditions per place. [2022-01-19 08:09:00,053 INFO L132 encePairwiseOnDemand]: 83/87 looper letters, 5 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2022-01-19 08:09:00,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 166 flow [2022-01-19 08:09:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 08:09:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 08:09:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2022-01-19 08:09:00,073 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9367816091954023 [2022-01-19 08:09:00,073 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2022-01-19 08:09:00,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2022-01-19 08:09:00,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:00,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2022-01-19 08:09:00,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:00,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:00,085 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:00,087 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 163 transitions. [2022-01-19 08:09:00,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 166 flow [2022-01-19 08:09:00,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 08:09:00,100 INFO L242 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2022-01-19 08:09:00,101 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2022-01-19 08:09:00,106 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2022-01-19 08:09:00,106 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2022-01-19 08:09:00,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:00,106 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:00,107 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:09:00,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 08:09:00,107 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:00,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:00,109 INFO L85 PathProgramCache]: Analyzing trace with hash 653583360, now seen corresponding path program 1 times [2022-01-19 08:09:00,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:00,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663854339] [2022-01-19 08:09:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:00,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:00,297 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 08:09:00,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:00,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663854339] [2022-01-19 08:09:00,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663854339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:09:00,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:09:00,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:09:00,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319406163] [2022-01-19 08:09:00,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:09:00,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:09:00,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:00,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:09:00,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:09:00,301 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-01-19 08:09:00,301 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:00,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:00,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-01-19 08:09:00,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:00,356 INFO L129 PetriNetUnfolder]: 8/111 cut-off events. [2022-01-19 08:09:00,356 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-01-19 08:09:00,357 INFO L84 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 111 events. 8/111 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 176 event pairs, 1 based on Foata normal form. 4/107 useless extension candidates. Maximal degree in co-relation 144. Up to 19 conditions per place. [2022-01-19 08:09:00,357 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 2 changer transitions 5/77 dead transitions. [2022-01-19 08:09:00,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 205 flow [2022-01-19 08:09:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 08:09:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 08:09:00,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2022-01-19 08:09:00,360 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8022988505747126 [2022-01-19 08:09:00,360 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2022-01-19 08:09:00,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2022-01-19 08:09:00,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:00,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2022-01-19 08:09:00,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:00,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:00,364 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:00,364 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 5 states and 349 transitions. [2022-01-19 08:09:00,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 205 flow [2022-01-19 08:09:00,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 08:09:00,366 INFO L242 Difference]: Finished difference. Result has 79 places, 71 transitions, 162 flow [2022-01-19 08:09:00,366 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-01-19 08:09:00,366 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 2 predicate places. [2022-01-19 08:09:00,366 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 162 flow [2022-01-19 08:09:00,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:00,367 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:00,367 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] [2022-01-19 08:09:00,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 08:09:00,367 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:00,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:00,368 INFO L85 PathProgramCache]: Analyzing trace with hash -824748536, now seen corresponding path program 1 times [2022-01-19 08:09:00,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:00,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518411976] [2022-01-19 08:09:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:00,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:00,501 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 08:09:00,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:00,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518411976] [2022-01-19 08:09:00,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518411976] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:00,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206865139] [2022-01-19 08:09:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:00,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:00,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:00,503 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 08:09:00,541 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 08:09:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:00,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 08:09:00,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:00,780 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 08:09:00,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:00,946 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 08:09:00,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206865139] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:00,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-19 08:09:00,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-01-19 08:09:00,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785657961] [2022-01-19 08:09:00,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:09:00,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 08:09:00,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:00,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 08:09:00,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-19 08:09:00,950 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 87 [2022-01-19 08:09:00,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:00,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:00,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 87 [2022-01-19 08:09:00,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:01,023 INFO L129 PetriNetUnfolder]: 42/189 cut-off events. [2022-01-19 08:09:01,024 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-01-19 08:09:01,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 189 events. 42/189 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 706 event pairs, 12 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 300. Up to 38 conditions per place. [2022-01-19 08:09:01,026 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 18 selfloop transitions, 5 changer transitions 3/83 dead transitions. [2022-01-19 08:09:01,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 83 transitions, 242 flow [2022-01-19 08:09:01,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 08:09:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 08:09:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2022-01-19 08:09:01,030 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8591954022988506 [2022-01-19 08:09:01,033 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2022-01-19 08:09:01,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2022-01-19 08:09:01,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:01,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2022-01-19 08:09:01,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:01,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:01,039 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:01,039 INFO L186 Difference]: Start difference. First operand has 79 places, 71 transitions, 162 flow. Second operand 4 states and 299 transitions. [2022-01-19 08:09:01,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 83 transitions, 242 flow [2022-01-19 08:09:01,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 83 transitions, 236 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 08:09:01,042 INFO L242 Difference]: Finished difference. Result has 80 places, 75 transitions, 192 flow [2022-01-19 08:09:01,042 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2022-01-19 08:09:01,044 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-01-19 08:09:01,045 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 192 flow [2022-01-19 08:09:01,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:01,045 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:01,045 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] [2022-01-19 08:09:01,080 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 08:09:01,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:01,260 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:01,261 INFO L85 PathProgramCache]: Analyzing trace with hash 565393570, now seen corresponding path program 2 times [2022-01-19 08:09:01,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:01,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931450119] [2022-01-19 08:09:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:01,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:01,337 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 08:09:01,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:01,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931450119] [2022-01-19 08:09:01,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931450119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:09:01,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:09:01,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:09:01,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724976805] [2022-01-19 08:09:01,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:09:01,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:09:01,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:01,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:09:01,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:09:01,343 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-01-19 08:09:01,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:01,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:01,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-01-19 08:09:01,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:01,438 INFO L129 PetriNetUnfolder]: 85/313 cut-off events. [2022-01-19 08:09:01,438 INFO L130 PetriNetUnfolder]: For 115/124 co-relation queries the response was YES. [2022-01-19 08:09:01,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 313 events. 85/313 cut-off events. For 115/124 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1507 event pairs, 28 based on Foata normal form. 7/313 useless extension candidates. Maximal degree in co-relation 637. Up to 107 conditions per place. [2022-01-19 08:09:01,442 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 38 selfloop transitions, 8 changer transitions 11/111 dead transitions. [2022-01-19 08:09:01,442 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 438 flow [2022-01-19 08:09:01,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:09:01,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:09:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 441 transitions. [2022-01-19 08:09:01,443 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8448275862068966 [2022-01-19 08:09:01,443 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 441 transitions. [2022-01-19 08:09:01,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 441 transitions. [2022-01-19 08:09:01,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:01,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 441 transitions. [2022-01-19 08:09:01,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.5) internal successors, (441), 6 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:01,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:01,446 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:01,446 INFO L186 Difference]: Start difference. First operand has 80 places, 75 transitions, 192 flow. Second operand 6 states and 441 transitions. [2022-01-19 08:09:01,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 438 flow [2022-01-19 08:09:01,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 438 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 08:09:01,452 INFO L242 Difference]: Finished difference. Result has 89 places, 82 transitions, 268 flow [2022-01-19 08:09:01,452 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=89, PETRI_TRANSITIONS=82} [2022-01-19 08:09:01,453 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 12 predicate places. [2022-01-19 08:09:01,453 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 82 transitions, 268 flow [2022-01-19 08:09:01,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:01,454 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:01,454 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] [2022-01-19 08:09:01,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 08:09:01,454 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:01,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:01,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1895955256, now seen corresponding path program 3 times [2022-01-19 08:09:01,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:01,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529793644] [2022-01-19 08:09:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:01,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:01,573 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 08:09:01,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:01,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529793644] [2022-01-19 08:09:01,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529793644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:01,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675774299] [2022-01-19 08:09:01,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:09:01,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:01,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:01,590 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 08:09:01,601 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 08:09:01,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 08:09:01,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:09:01,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 08:09:01,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:01,864 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 08:09:01,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:01,979 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 08:09:01,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675774299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:09:01,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:09:01,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-19 08:09:01,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142076442] [2022-01-19 08:09:01,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:09:01,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 08:09:01,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:01,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 08:09:01,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-19 08:09:01,982 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-01-19 08:09:01,982 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 82 transitions, 268 flow. Second operand has 9 states, 9 states have (on average 67.55555555555556) internal successors, (608), 9 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:01,982 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:01,982 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-01-19 08:09:01,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:02,114 INFO L129 PetriNetUnfolder]: 111/369 cut-off events. [2022-01-19 08:09:02,114 INFO L130 PetriNetUnfolder]: For 348/348 co-relation queries the response was YES. [2022-01-19 08:09:02,115 INFO L84 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 369 events. 111/369 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1628 event pairs, 19 based on Foata normal form. 9/371 useless extension candidates. Maximal degree in co-relation 931. Up to 83 conditions per place. [2022-01-19 08:09:02,117 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 47 selfloop transitions, 20 changer transitions 2/123 dead transitions. [2022-01-19 08:09:02,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 123 transitions, 594 flow [2022-01-19 08:09:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 08:09:02,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 08:09:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 578 transitions. [2022-01-19 08:09:02,119 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8304597701149425 [2022-01-19 08:09:02,119 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 578 transitions. [2022-01-19 08:09:02,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 578 transitions. [2022-01-19 08:09:02,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:02,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 578 transitions. [2022-01-19 08:09:02,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.25) internal successors, (578), 8 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:02,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:02,122 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:02,122 INFO L186 Difference]: Start difference. First operand has 89 places, 82 transitions, 268 flow. Second operand 8 states and 578 transitions. [2022-01-19 08:09:02,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 123 transitions, 594 flow [2022-01-19 08:09:02,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 123 transitions, 588 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-01-19 08:09:02,126 INFO L242 Difference]: Finished difference. Result has 99 places, 93 transitions, 427 flow [2022-01-19 08:09:02,126 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=427, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2022-01-19 08:09:02,126 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 22 predicate places. [2022-01-19 08:09:02,127 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 427 flow [2022-01-19 08:09:02,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 67.55555555555556) internal successors, (608), 9 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:02,127 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:02,127 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] [2022-01-19 08:09:02,145 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 08:09:02,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:02,346 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:02,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:02,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2095100888, now seen corresponding path program 4 times [2022-01-19 08:09:02,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:02,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027792677] [2022-01-19 08:09:02,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:02,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:02,399 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 08:09:02,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:02,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027792677] [2022-01-19 08:09:02,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027792677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:09:02,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:09:02,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:09:02,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530746942] [2022-01-19 08:09:02,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:09:02,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:09:02,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:02,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:09:02,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:09:02,401 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-01-19 08:09:02,402 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 427 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:02,402 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:02,402 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-01-19 08:09:02,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:02,476 INFO L129 PetriNetUnfolder]: 110/332 cut-off events. [2022-01-19 08:09:02,476 INFO L130 PetriNetUnfolder]: For 773/775 co-relation queries the response was YES. [2022-01-19 08:09:02,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 332 events. 110/332 cut-off events. For 773/775 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1380 event pairs, 40 based on Foata normal form. 2/327 useless extension candidates. Maximal degree in co-relation 1046. Up to 120 conditions per place. [2022-01-19 08:09:02,479 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 37 selfloop transitions, 9 changer transitions 2/102 dead transitions. [2022-01-19 08:09:02,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 102 transitions, 570 flow [2022-01-19 08:09:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:09:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:09:02,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 421 transitions. [2022-01-19 08:09:02,481 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8065134099616859 [2022-01-19 08:09:02,481 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 421 transitions. [2022-01-19 08:09:02,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 421 transitions. [2022-01-19 08:09:02,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:02,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 421 transitions. [2022-01-19 08:09:02,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.16666666666667) internal successors, (421), 6 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:02,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:02,483 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:02,483 INFO L186 Difference]: Start difference. First operand has 99 places, 93 transitions, 427 flow. Second operand 6 states and 421 transitions. [2022-01-19 08:09:02,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 102 transitions, 570 flow [2022-01-19 08:09:02,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 102 transitions, 550 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-01-19 08:09:02,487 INFO L242 Difference]: Finished difference. Result has 105 places, 93 transitions, 440 flow [2022-01-19 08:09:02,487 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=440, PETRI_PLACES=105, PETRI_TRANSITIONS=93} [2022-01-19 08:09:02,488 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 28 predicate places. [2022-01-19 08:09:02,488 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 93 transitions, 440 flow [2022-01-19 08:09:02,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:02,488 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:02,488 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 08:09:02,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 08:09:02,488 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:02,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:02,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1438588188, now seen corresponding path program 1 times [2022-01-19 08:09:02,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:02,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119497647] [2022-01-19 08:09:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:02,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:02,555 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 08:09:02,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:02,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119497647] [2022-01-19 08:09:02,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119497647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:02,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726511116] [2022-01-19 08:09:02,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:02,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:02,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:02,571 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 08:09:02,572 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 08:09:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:02,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 08:09:02,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:09:02,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:09:02,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726511116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:09:02,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:09:02,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2022-01-19 08:09:02,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68253350] [2022-01-19 08:09:02,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:09:02,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 08:09:02,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:02,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 08:09:02,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-19 08:09:02,852 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:09:02,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 93 transitions, 440 flow. Second operand has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:02,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:02,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:09:02,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:02,966 INFO L129 PetriNetUnfolder]: 61/380 cut-off events. [2022-01-19 08:09:02,966 INFO L130 PetriNetUnfolder]: For 829/850 co-relation queries the response was YES. [2022-01-19 08:09:02,967 INFO L84 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 380 events. 61/380 cut-off events. For 829/850 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1898 event pairs, 13 based on Foata normal form. 11/384 useless extension candidates. Maximal degree in co-relation 967. Up to 45 conditions per place. [2022-01-19 08:09:02,968 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 22 selfloop transitions, 7 changer transitions 5/109 dead transitions. [2022-01-19 08:09:02,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 109 transitions, 552 flow [2022-01-19 08:09:02,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 08:09:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 08:09:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2022-01-19 08:09:02,972 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7816091954022989 [2022-01-19 08:09:02,972 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2022-01-19 08:09:02,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2022-01-19 08:09:02,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:02,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2022-01-19 08:09:02,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.0) internal successors, (476), 7 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 08:09:02,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:02,974 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:02,974 INFO L186 Difference]: Start difference. First operand has 105 places, 93 transitions, 440 flow. Second operand 7 states and 476 transitions. [2022-01-19 08:09:02,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 109 transitions, 552 flow [2022-01-19 08:09:02,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 109 transitions, 518 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-01-19 08:09:02,977 INFO L242 Difference]: Finished difference. Result has 107 places, 96 transitions, 454 flow [2022-01-19 08:09:02,977 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=454, PETRI_PLACES=107, PETRI_TRANSITIONS=96} [2022-01-19 08:09:02,978 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 30 predicate places. [2022-01-19 08:09:02,978 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 96 transitions, 454 flow [2022-01-19 08:09:02,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:02,978 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:02,978 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:09:02,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-19 08:09:03,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:03,191 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:03,192 INFO L85 PathProgramCache]: Analyzing trace with hash -664902924, now seen corresponding path program 2 times [2022-01-19 08:09:03,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:03,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536176715] [2022-01-19 08:09:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:03,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:03,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:03,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536176715] [2022-01-19 08:09:03,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536176715] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:03,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267989323] [2022-01-19 08:09:03,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:09:03,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:03,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:03,292 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 08:09:03,293 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 08:09:03,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:09:03,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:09:03,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:09:03,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:03,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:03,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267989323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:09:03,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:09:03,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-19 08:09:03,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570555617] [2022-01-19 08:09:03,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:09:03,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 08:09:03,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:03,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 08:09:03,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-01-19 08:09:03,699 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:09:03,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 96 transitions, 454 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:03,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:03,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:09:03,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:04,230 INFO L129 PetriNetUnfolder]: 343/992 cut-off events. [2022-01-19 08:09:04,231 INFO L130 PetriNetUnfolder]: For 2196/2202 co-relation queries the response was YES. [2022-01-19 08:09:04,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 992 events. 343/992 cut-off events. For 2196/2202 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6084 event pairs, 60 based on Foata normal form. 5/992 useless extension candidates. Maximal degree in co-relation 3146. Up to 170 conditions per place. [2022-01-19 08:09:04,237 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 89 selfloop transitions, 46 changer transitions 9/198 dead transitions. [2022-01-19 08:09:04,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 198 transitions, 1378 flow [2022-01-19 08:09:04,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-19 08:09:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-01-19 08:09:04,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1556 transitions. [2022-01-19 08:09:04,241 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7776111944027986 [2022-01-19 08:09:04,241 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1556 transitions. [2022-01-19 08:09:04,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1556 transitions. [2022-01-19 08:09:04,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:04,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1556 transitions. [2022-01-19 08:09:04,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 67.65217391304348) internal successors, (1556), 23 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:04,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 87.0) internal successors, (2088), 24 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:04,247 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 87.0) internal successors, (2088), 24 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:04,247 INFO L186 Difference]: Start difference. First operand has 107 places, 96 transitions, 454 flow. Second operand 23 states and 1556 transitions. [2022-01-19 08:09:04,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 198 transitions, 1378 flow [2022-01-19 08:09:04,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 198 transitions, 1352 flow, removed 12 selfloop flow, removed 3 redundant places. [2022-01-19 08:09:04,256 INFO L242 Difference]: Finished difference. Result has 138 places, 128 transitions, 865 flow [2022-01-19 08:09:04,256 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=865, PETRI_PLACES=138, PETRI_TRANSITIONS=128} [2022-01-19 08:09:04,258 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 61 predicate places. [2022-01-19 08:09:04,258 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 128 transitions, 865 flow [2022-01-19 08:09:04,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:04,259 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:04,259 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:09:04,292 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 08:09:04,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:04,477 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1281276886, now seen corresponding path program 3 times [2022-01-19 08:09:04,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:04,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638413327] [2022-01-19 08:09:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:04,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:04,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:04,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638413327] [2022-01-19 08:09:04,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638413327] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:04,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775831829] [2022-01-19 08:09:04,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:09:04,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:04,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:04,587 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 08:09:04,619 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 08:09:04,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 08:09:04,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:09:04,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:09:04,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:04,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:04,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775831829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:09:04,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:09:04,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-19 08:09:04,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6664747] [2022-01-19 08:09:04,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:09:04,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:09:04,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:04,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:09:04,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:09:04,940 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:09:04,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 128 transitions, 865 flow. Second operand has 16 states, 16 states have (on average 65.5) internal successors, (1048), 16 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:04,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:04,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:09:04,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:05,883 INFO L129 PetriNetUnfolder]: 510/1339 cut-off events. [2022-01-19 08:09:05,884 INFO L130 PetriNetUnfolder]: For 5950/5958 co-relation queries the response was YES. [2022-01-19 08:09:05,888 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5665 conditions, 1339 events. 510/1339 cut-off events. For 5950/5958 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 8575 event pairs, 25 based on Foata normal form. 22/1352 useless extension candidates. Maximal degree in co-relation 5633. Up to 143 conditions per place. [2022-01-19 08:09:05,894 INFO L132 encePairwiseOnDemand]: 76/87 looper letters, 132 selfloop transitions, 174 changer transitions 12/372 dead transitions. [2022-01-19 08:09:05,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 372 transitions, 3609 flow [2022-01-19 08:09:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-19 08:09:05,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-01-19 08:09:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3173 transitions. [2022-01-19 08:09:05,901 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7759843482514062 [2022-01-19 08:09:05,901 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3173 transitions. [2022-01-19 08:09:05,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3173 transitions. [2022-01-19 08:09:05,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:05,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3173 transitions. [2022-01-19 08:09:05,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.51063829787235) internal successors, (3173), 47 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:05,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:05,914 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:05,914 INFO L186 Difference]: Start difference. First operand has 138 places, 128 transitions, 865 flow. Second operand 47 states and 3173 transitions. [2022-01-19 08:09:05,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 372 transitions, 3609 flow [2022-01-19 08:09:05,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 372 transitions, 3318 flow, removed 110 selfloop flow, removed 10 redundant places. [2022-01-19 08:09:05,934 INFO L242 Difference]: Finished difference. Result has 186 places, 264 transitions, 2469 flow [2022-01-19 08:09:05,934 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2469, PETRI_PLACES=186, PETRI_TRANSITIONS=264} [2022-01-19 08:09:05,935 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 109 predicate places. [2022-01-19 08:09:05,935 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 264 transitions, 2469 flow [2022-01-19 08:09:05,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.5) internal successors, (1048), 16 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:05,935 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:05,935 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:09:05,963 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 08:09:06,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:06,164 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:06,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:06,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1077969640, now seen corresponding path program 4 times [2022-01-19 08:09:06,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:06,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426198941] [2022-01-19 08:09:06,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:06,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:06,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:06,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426198941] [2022-01-19 08:09:06,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426198941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:06,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821538549] [2022-01-19 08:09:06,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:09:06,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:06,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:06,251 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 08:09:06,252 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 08:09:06,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:09:06,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:09:06,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:09:06,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:06,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:06,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821538549] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:09:06,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:09:06,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:09:06,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598239139] [2022-01-19 08:09:06,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:09:06,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:09:06,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:06,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:09:06,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:09:06,596 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:09:06,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 264 transitions, 2469 flow. Second operand has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:06,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:06,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:09:06,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:07,974 INFO L129 PetriNetUnfolder]: 709/2014 cut-off events. [2022-01-19 08:09:07,974 INFO L130 PetriNetUnfolder]: For 13737/13746 co-relation queries the response was YES. [2022-01-19 08:09:07,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9587 conditions, 2014 events. 709/2014 cut-off events. For 13737/13746 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 15185 event pairs, 7 based on Foata normal form. 10/2017 useless extension candidates. Maximal degree in co-relation 9543. Up to 218 conditions per place. [2022-01-19 08:09:07,991 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 225 selfloop transitions, 264 changer transitions 39/582 dead transitions. [2022-01-19 08:09:07,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 582 transitions, 6856 flow [2022-01-19 08:09:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-19 08:09:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-01-19 08:09:07,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4777 transitions. [2022-01-19 08:09:07,995 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7733527602395985 [2022-01-19 08:09:07,995 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4777 transitions. [2022-01-19 08:09:07,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4777 transitions. [2022-01-19 08:09:07,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:07,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4777 transitions. [2022-01-19 08:09:08,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 67.28169014084507) internal successors, (4777), 71 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:08,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 87.0) internal successors, (6264), 72 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:08,013 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 87.0) internal successors, (6264), 72 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:08,013 INFO L186 Difference]: Start difference. First operand has 186 places, 264 transitions, 2469 flow. Second operand 71 states and 4777 transitions. [2022-01-19 08:09:08,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 582 transitions, 6856 flow [2022-01-19 08:09:08,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 582 transitions, 6408 flow, removed 149 selfloop flow, removed 2 redundant places. [2022-01-19 08:09:08,061 INFO L242 Difference]: Finished difference. Result has 277 places, 417 transitions, 4636 flow [2022-01-19 08:09:08,062 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=4636, PETRI_PLACES=277, PETRI_TRANSITIONS=417} [2022-01-19 08:09:08,062 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 200 predicate places. [2022-01-19 08:09:08,062 INFO L470 AbstractCegarLoop]: Abstraction has has 277 places, 417 transitions, 4636 flow [2022-01-19 08:09:08,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:08,063 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:08,063 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:09:08,092 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 08:09:08,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:08,278 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:08,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:08,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1322624998, now seen corresponding path program 5 times [2022-01-19 08:09:08,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:08,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995244169] [2022-01-19 08:09:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:08,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:08,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:08,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995244169] [2022-01-19 08:09:08,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995244169] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:08,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677472255] [2022-01-19 08:09:08,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:09:08,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:08,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:08,403 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:09:08,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 08:09:08,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:09:08,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:09:08,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 08:09:08,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:08,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:08,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677472255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:09:08,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:09:08,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 08:09:08,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060558536] [2022-01-19 08:09:08,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:09:08,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 08:09:08,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 08:09:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-19 08:09:08,867 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:09:08,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 417 transitions, 4636 flow. Second operand has 21 states, 21 states have (on average 65.28571428571429) internal successors, (1371), 21 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:08,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:08,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:09:08,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:11,071 INFO L129 PetriNetUnfolder]: 1218/3588 cut-off events. [2022-01-19 08:09:11,071 INFO L130 PetriNetUnfolder]: For 57806/57820 co-relation queries the response was YES. [2022-01-19 08:09:11,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20377 conditions, 3588 events. 1218/3588 cut-off events. For 57806/57820 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31670 event pairs, 67 based on Foata normal form. 34/3604 useless extension candidates. Maximal degree in co-relation 20309. Up to 430 conditions per place. [2022-01-19 08:09:11,115 INFO L132 encePairwiseOnDemand]: 72/87 looper letters, 251 selfloop transitions, 554 changer transitions 5/864 dead transitions. [2022-01-19 08:09:11,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 864 transitions, 11929 flow [2022-01-19 08:09:11,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-19 08:09:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-01-19 08:09:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3657 transitions. [2022-01-19 08:09:11,118 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7784163473818646 [2022-01-19 08:09:11,118 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3657 transitions. [2022-01-19 08:09:11,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3657 transitions. [2022-01-19 08:09:11,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:11,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3657 transitions. [2022-01-19 08:09:11,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 67.72222222222223) internal successors, (3657), 54 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:11,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:11,129 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:11,129 INFO L186 Difference]: Start difference. First operand has 277 places, 417 transitions, 4636 flow. Second operand 54 states and 3657 transitions. [2022-01-19 08:09:11,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 864 transitions, 11929 flow [2022-01-19 08:09:11,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 864 transitions, 10547 flow, removed 608 selfloop flow, removed 6 redundant places. [2022-01-19 08:09:11,377 INFO L242 Difference]: Finished difference. Result has 337 places, 713 transitions, 9140 flow [2022-01-19 08:09:11,378 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=9140, PETRI_PLACES=337, PETRI_TRANSITIONS=713} [2022-01-19 08:09:11,378 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 260 predicate places. [2022-01-19 08:09:11,378 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 713 transitions, 9140 flow [2022-01-19 08:09:11,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 65.28571428571429) internal successors, (1371), 21 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:11,379 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:11,379 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:09:11,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 08:09:11,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:11,583 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:11,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:11,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1299198750, now seen corresponding path program 6 times [2022-01-19 08:09:11,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:11,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297045579] [2022-01-19 08:09:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:11,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:11,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:11,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297045579] [2022-01-19 08:09:11,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297045579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:11,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018269026] [2022-01-19 08:09:11,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:09:11,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:11,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:11,692 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:09:11,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 08:09:11,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 08:09:11,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:09:11,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:09:11,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:11,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:12,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018269026] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:09:12,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:09:12,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-19 08:09:12,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146500127] [2022-01-19 08:09:12,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:09:12,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 08:09:12,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:12,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 08:09:12,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-19 08:09:12,048 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:09:12,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 713 transitions, 9140 flow. Second operand has 20 states, 20 states have (on average 65.3) internal successors, (1306), 20 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:12,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:12,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:09:12,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:15,290 INFO L129 PetriNetUnfolder]: 1744/5140 cut-off events. [2022-01-19 08:09:15,290 INFO L130 PetriNetUnfolder]: For 87893/87911 co-relation queries the response was YES. [2022-01-19 08:09:15,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30648 conditions, 5140 events. 1744/5140 cut-off events. For 87893/87911 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 49796 event pairs, 53 based on Foata normal form. 36/5152 useless extension candidates. Maximal degree in co-relation 30564. Up to 665 conditions per place. [2022-01-19 08:09:15,350 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 255 selfloop transitions, 887 changer transitions 11/1207 dead transitions. [2022-01-19 08:09:15,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1207 transitions, 18397 flow [2022-01-19 08:09:15,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-19 08:09:15,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-01-19 08:09:15,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 7221 transitions. [2022-01-19 08:09:15,357 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7685185185185185 [2022-01-19 08:09:15,357 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 7221 transitions. [2022-01-19 08:09:15,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 7221 transitions. [2022-01-19 08:09:15,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:15,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 7221 transitions. [2022-01-19 08:09:15,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 66.86111111111111) internal successors, (7221), 108 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:15,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:15,376 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:15,376 INFO L186 Difference]: Start difference. First operand has 337 places, 713 transitions, 9140 flow. Second operand 108 states and 7221 transitions. [2022-01-19 08:09:15,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1207 transitions, 18397 flow [2022-01-19 08:09:15,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1207 transitions, 18138 flow, removed 123 selfloop flow, removed 4 redundant places. [2022-01-19 08:09:15,752 INFO L242 Difference]: Finished difference. Result has 471 places, 1049 transitions, 16429 flow [2022-01-19 08:09:15,752 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=9087, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=16429, PETRI_PLACES=471, PETRI_TRANSITIONS=1049} [2022-01-19 08:09:15,753 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 394 predicate places. [2022-01-19 08:09:15,753 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 1049 transitions, 16429 flow [2022-01-19 08:09:15,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.3) internal successors, (1306), 20 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:15,753 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:15,753 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:09:15,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 08:09:15,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 08:09:15,974 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:15,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:15,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1287637296, now seen corresponding path program 7 times [2022-01-19 08:09:15,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:15,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157716059] [2022-01-19 08:09:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:15,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:16,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:16,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157716059] [2022-01-19 08:09:16,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157716059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:16,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368869228] [2022-01-19 08:09:16,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:09:16,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:16,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:16,063 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:09:16,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 08:09:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:16,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:09:16,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:16,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:16,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368869228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:09:16,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:09:16,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:09:16,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691627953] [2022-01-19 08:09:16,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:09:16,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:09:16,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:16,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:09:16,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:09:16,582 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:09:16,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1049 transitions, 16429 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 08:09:16,583 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:16,583 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:09:16,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:20,381 INFO L129 PetriNetUnfolder]: 2332/6723 cut-off events. [2022-01-19 08:09:20,381 INFO L130 PetriNetUnfolder]: For 149849/149865 co-relation queries the response was YES. [2022-01-19 08:09:20,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45589 conditions, 6723 events. 2332/6723 cut-off events. For 149849/149865 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 68695 event pairs, 88 based on Foata normal form. 36/6731 useless extension candidates. Maximal degree in co-relation 45475. Up to 854 conditions per place. [2022-01-19 08:09:20,539 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 282 selfloop transitions, 1271 changer transitions 6/1613 dead transitions. [2022-01-19 08:09:20,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 1613 transitions, 28646 flow [2022-01-19 08:09:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-19 08:09:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-01-19 08:09:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 5263 transitions. [2022-01-19 08:09:20,545 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7657500363742179 [2022-01-19 08:09:20,545 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 5263 transitions. [2022-01-19 08:09:20,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 5263 transitions. [2022-01-19 08:09:20,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:20,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 5263 transitions. [2022-01-19 08:09:20,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 66.62025316455696) internal successors, (5263), 79 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:20,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:20,556 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:20,556 INFO L186 Difference]: Start difference. First operand has 471 places, 1049 transitions, 16429 flow. Second operand 79 states and 5263 transitions. [2022-01-19 08:09:20,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 1613 transitions, 28646 flow [2022-01-19 08:09:21,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 1613 transitions, 27473 flow, removed 291 selfloop flow, removed 30 redundant places. [2022-01-19 08:09:21,588 INFO L242 Difference]: Finished difference. Result has 552 places, 1519 transitions, 27372 flow [2022-01-19 08:09:21,589 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15527, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1048, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=802, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=27372, PETRI_PLACES=552, PETRI_TRANSITIONS=1519} [2022-01-19 08:09:21,590 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 475 predicate places. [2022-01-19 08:09:21,590 INFO L470 AbstractCegarLoop]: Abstraction has has 552 places, 1519 transitions, 27372 flow [2022-01-19 08:09:21,590 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 08:09:21,590 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:21,590 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:09:21,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 08:09:21,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 08:09:21,806 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:21,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:21,807 INFO L85 PathProgramCache]: Analyzing trace with hash 41325334, now seen corresponding path program 8 times [2022-01-19 08:09:21,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:21,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073991832] [2022-01-19 08:09:21,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:21,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:21,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:21,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073991832] [2022-01-19 08:09:21,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073991832] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:21,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62973800] [2022-01-19 08:09:21,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:09:21,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:21,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:21,914 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:09:21,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 08:09:21,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:09:21,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:09:21,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:09:21,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:22,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:22,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62973800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:09:22,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:09:22,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 08:09:22,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777949494] [2022-01-19 08:09:22,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:09:22,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 08:09:22,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:22,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 08:09:22,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-19 08:09:22,257 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:09:22,257 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 1519 transitions, 27372 flow. Second operand has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:22,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:22,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:09:22,257 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:27,971 INFO L129 PetriNetUnfolder]: 3627/10432 cut-off events. [2022-01-19 08:09:27,971 INFO L130 PetriNetUnfolder]: For 268855/268873 co-relation queries the response was YES. [2022-01-19 08:09:28,188 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77244 conditions, 10432 events. 3627/10432 cut-off events. For 268855/268873 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 114513 event pairs, 307 based on Foata normal form. 16/10297 useless extension candidates. Maximal degree in co-relation 77101. Up to 1646 conditions per place. [2022-01-19 08:09:28,248 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 866 selfloop transitions, 1692 changer transitions 6/2618 dead transitions. [2022-01-19 08:09:28,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 2618 transitions, 53706 flow [2022-01-19 08:09:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-19 08:09:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2022-01-19 08:09:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 6267 transitions. [2022-01-19 08:09:28,254 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7663242846661775 [2022-01-19 08:09:28,254 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 6267 transitions. [2022-01-19 08:09:28,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 6267 transitions. [2022-01-19 08:09:28,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:28,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 6267 transitions. [2022-01-19 08:09:28,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 66.67021276595744) internal successors, (6267), 94 states have internal predecessors, (6267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:28,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 87.0) internal successors, (8265), 95 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:28,268 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 87.0) internal successors, (8265), 95 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:28,268 INFO L186 Difference]: Start difference. First operand has 552 places, 1519 transitions, 27372 flow. Second operand 94 states and 6267 transitions. [2022-01-19 08:09:28,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 2618 transitions, 53706 flow [2022-01-19 08:09:31,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 2618 transitions, 53459 flow, removed 49 selfloop flow, removed 13 redundant places. [2022-01-19 08:09:31,281 INFO L242 Difference]: Finished difference. Result has 662 places, 2435 transitions, 51170 flow [2022-01-19 08:09:31,282 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=27165, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=51170, PETRI_PLACES=662, PETRI_TRANSITIONS=2435} [2022-01-19 08:09:31,286 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 585 predicate places. [2022-01-19 08:09:31,286 INFO L470 AbstractCegarLoop]: Abstraction has has 662 places, 2435 transitions, 51170 flow [2022-01-19 08:09:31,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:31,286 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:31,286 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:09:31,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 08:09:31,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 08:09:31,502 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:31,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1361762118, now seen corresponding path program 9 times [2022-01-19 08:09:31,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:31,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82213640] [2022-01-19 08:09:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:31,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:31,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:31,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82213640] [2022-01-19 08:09:31,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82213640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:31,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277239919] [2022-01-19 08:09:31,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:09:31,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:31,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:31,597 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:09:31,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 08:09:31,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 08:09:31,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:09:31,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:09:31,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:31,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:32,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277239919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:09:32,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:09:32,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 08:09:32,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640727222] [2022-01-19 08:09:32,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:09:32,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 08:09:32,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:32,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 08:09:32,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-19 08:09:32,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:09:32,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 2435 transitions, 51170 flow. Second operand has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:32,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:32,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:09:32,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:40,471 INFO L129 PetriNetUnfolder]: 4556/13004 cut-off events. [2022-01-19 08:09:40,471 INFO L130 PetriNetUnfolder]: For 431492/431524 co-relation queries the response was YES. [2022-01-19 08:09:40,757 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108838 conditions, 13004 events. 4556/13004 cut-off events. For 431492/431524 co-relation queries the response was YES. Maximal size of possible extension queue 971. Compared 147728 event pairs, 381 based on Foata normal form. 15/12822 useless extension candidates. Maximal degree in co-relation 108666. Up to 2428 conditions per place. [2022-01-19 08:09:40,818 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 1162 selfloop transitions, 1811 changer transitions 6/3033 dead transitions. [2022-01-19 08:09:40,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 3033 transitions, 70163 flow [2022-01-19 08:09:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 08:09:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 08:09:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3864 transitions. [2022-01-19 08:09:40,821 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.779189352692075 [2022-01-19 08:09:40,821 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3864 transitions. [2022-01-19 08:09:40,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3864 transitions. [2022-01-19 08:09:40,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:40,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3864 transitions. [2022-01-19 08:09:40,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 67.78947368421052) internal successors, (3864), 57 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:40,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 87.0) internal successors, (5046), 58 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:40,829 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 87.0) internal successors, (5046), 58 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:40,829 INFO L186 Difference]: Start difference. First operand has 662 places, 2435 transitions, 51170 flow. Second operand 57 states and 3864 transitions. [2022-01-19 08:09:40,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 3033 transitions, 70163 flow [2022-01-19 08:09:49,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 3033 transitions, 67424 flow, removed 1358 selfloop flow, removed 3 redundant places. [2022-01-19 08:09:49,563 INFO L242 Difference]: Finished difference. Result has 732 places, 2863 transitions, 64007 flow [2022-01-19 08:09:49,564 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=49313, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=64007, PETRI_PLACES=732, PETRI_TRANSITIONS=2863} [2022-01-19 08:09:49,564 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 655 predicate places. [2022-01-19 08:09:49,564 INFO L470 AbstractCegarLoop]: Abstraction has has 732 places, 2863 transitions, 64007 flow [2022-01-19 08:09:49,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:49,565 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:49,565 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:09:49,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 08:09:49,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 08:09:49,779 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:49,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:49,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1238803636, now seen corresponding path program 10 times [2022-01-19 08:09:49,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:49,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549369937] [2022-01-19 08:09:49,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:49,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:49,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:49,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549369937] [2022-01-19 08:09:49,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549369937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:49,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502026330] [2022-01-19 08:09:49,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:09:49,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:49,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:49,874 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:09:49,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 08:09:49,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:09:49,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:09:49,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:09:49,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:50,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:50,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502026330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:09:50,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:09:50,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:09:50,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082956234] [2022-01-19 08:09:50,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:09:50,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:09:50,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:50,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:09:50,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:09:50,281 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:09:50,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 2863 transitions, 64007 flow. Second operand has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:50,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:50,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:09:50,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:10:03,036 INFO L129 PetriNetUnfolder]: 4829/13945 cut-off events. [2022-01-19 08:10:03,037 INFO L130 PetriNetUnfolder]: For 411844/411880 co-relation queries the response was YES. [2022-01-19 08:10:03,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117434 conditions, 13945 events. 4829/13945 cut-off events. For 411844/411880 co-relation queries the response was YES. Maximal size of possible extension queue 1092. Compared 161731 event pairs, 433 based on Foata normal form. 43/13788 useless extension candidates. Maximal degree in co-relation 117243. Up to 1944 conditions per place. [2022-01-19 08:10:03,419 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 631 selfloop transitions, 2562 changer transitions 1/3248 dead transitions. [2022-01-19 08:10:03,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 860 places, 3248 transitions, 78226 flow [2022-01-19 08:10:03,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-19 08:10:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2022-01-19 08:10:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 8662 transitions. [2022-01-19 08:10:03,426 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7658709106984969 [2022-01-19 08:10:03,426 INFO L72 ComplementDD]: Start complementDD. Operand 130 states and 8662 transitions. [2022-01-19 08:10:03,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 8662 transitions. [2022-01-19 08:10:03,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:10:03,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 130 states and 8662 transitions. [2022-01-19 08:10:03,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 131 states, 130 states have (on average 66.63076923076923) internal successors, (8662), 130 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:03,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:03,446 INFO L81 ComplementDD]: Finished complementDD. Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:03,447 INFO L186 Difference]: Start difference. First operand has 732 places, 2863 transitions, 64007 flow. Second operand 130 states and 8662 transitions. [2022-01-19 08:10:03,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 860 places, 3248 transitions, 78226 flow [2022-01-19 08:10:10,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 3248 transitions, 77693 flow, removed 232 selfloop flow, removed 8 redundant places. [2022-01-19 08:10:10,725 INFO L242 Difference]: Finished difference. Result has 876 places, 3104 transitions, 76734 flow [2022-01-19 08:10:10,726 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=63474, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=76734, PETRI_PLACES=876, PETRI_TRANSITIONS=3104} [2022-01-19 08:10:10,727 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 799 predicate places. [2022-01-19 08:10:10,727 INFO L470 AbstractCegarLoop]: Abstraction has has 876 places, 3104 transitions, 76734 flow [2022-01-19 08:10:10,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:10,727 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:10:10,727 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:10:10,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 08:10:10,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-19 08:10:10,943 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:10:10,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:10:10,943 INFO L85 PathProgramCache]: Analyzing trace with hash 262790282, now seen corresponding path program 11 times [2022-01-19 08:10:10,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:10:10,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763955602] [2022-01-19 08:10:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:10:10,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:10:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:10:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:10:11,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:10:11,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763955602] [2022-01-19 08:10:11,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763955602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:10:11,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601055799] [2022-01-19 08:10:11,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:10:11,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:10:11,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:10:11,040 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:10:11,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 08:10:11,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:10:11,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:10:11,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 08:10:11,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:10:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:10:11,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:10:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:10:11,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601055799] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:10:11,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:10:11,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-19 08:10:11,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570843436] [2022-01-19 08:10:11,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:10:11,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 08:10:11,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:10:11,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 08:10:11,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-19 08:10:11,492 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:10:11,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 876 places, 3104 transitions, 76734 flow. Second operand has 22 states, 22 states have (on average 65.0909090909091) internal successors, (1432), 22 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:11,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:10:11,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:10:11,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:10:30,448 INFO L129 PetriNetUnfolder]: 7737/22351 cut-off events. [2022-01-19 08:10:30,448 INFO L130 PetriNetUnfolder]: For 773389/773411 co-relation queries the response was YES. [2022-01-19 08:10:30,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 197699 conditions, 22351 events. 7737/22351 cut-off events. For 773389/773411 co-relation queries the response was YES. Maximal size of possible extension queue 1700. Compared 278491 event pairs, 768 based on Foata normal form. 17/22033 useless extension candidates. Maximal degree in co-relation 197484. Up to 3287 conditions per place. [2022-01-19 08:10:30,904 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 1809 selfloop transitions, 3057 changer transitions 22/4942 dead transitions. [2022-01-19 08:10:30,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 945 places, 4942 transitions, 131960 flow [2022-01-19 08:10:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 08:10:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 08:10:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4702 transitions. [2022-01-19 08:10:30,908 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7720853858784893 [2022-01-19 08:10:30,908 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4702 transitions. [2022-01-19 08:10:30,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4702 transitions. [2022-01-19 08:10:30,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:10:30,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4702 transitions. [2022-01-19 08:10:30,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 67.17142857142858) internal successors, (4702), 70 states have internal predecessors, (4702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:30,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 87.0) internal successors, (6177), 71 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:30,916 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 87.0) internal successors, (6177), 71 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:30,916 INFO L186 Difference]: Start difference. First operand has 876 places, 3104 transitions, 76734 flow. Second operand 70 states and 4702 transitions. [2022-01-19 08:10:30,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 945 places, 4942 transitions, 131960 flow [2022-01-19 08:10:45,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 4942 transitions, 129507 flow, removed 285 selfloop flow, removed 59 redundant places. [2022-01-19 08:10:45,234 INFO L242 Difference]: Finished difference. Result has 923 places, 4694 transitions, 128059 flow [2022-01-19 08:10:45,236 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=75105, PETRI_DIFFERENCE_MINUEND_PLACES=817, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1768, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1018, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=128059, PETRI_PLACES=923, PETRI_TRANSITIONS=4694} [2022-01-19 08:10:45,237 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 846 predicate places. [2022-01-19 08:10:45,237 INFO L470 AbstractCegarLoop]: Abstraction has has 923 places, 4694 transitions, 128059 flow [2022-01-19 08:10:45,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 65.0909090909091) internal successors, (1432), 22 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:45,237 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:10:45,237 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:10:45,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 08:10:45,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-19 08:10:45,452 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:10:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:10:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1258186080, now seen corresponding path program 12 times [2022-01-19 08:10:45,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:10:45,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59715720] [2022-01-19 08:10:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:10:45,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:10:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:10:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:10:45,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:10:45,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59715720] [2022-01-19 08:10:45,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59715720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:10:45,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138627185] [2022-01-19 08:10:45,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:10:45,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:10:45,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:10:45,530 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:10:45,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 08:10:45,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 08:10:45,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:10:45,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:10:45,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:10:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:10:45,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:10:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:10:45,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138627185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:10:45,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:10:45,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:10:45,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531302448] [2022-01-19 08:10:45,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:10:45,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:10:45,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:10:45,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:10:45,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:10:45,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:10:45,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 923 places, 4694 transitions, 128059 flow. Second operand has 19 states, 19 states have (on average 65.21052631578948) internal successors, (1239), 19 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:45,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:10:45,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:10:45,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:11:14,440 INFO L129 PetriNetUnfolder]: 8050/23040 cut-off events. [2022-01-19 08:11:14,440 INFO L130 PetriNetUnfolder]: For 1049489/1049543 co-relation queries the response was YES. [2022-01-19 08:11:14,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 224860 conditions, 23040 events. 8050/23040 cut-off events. For 1049489/1049543 co-relation queries the response was YES. Maximal size of possible extension queue 1743. Compared 287041 event pairs, 731 based on Foata normal form. 46/22716 useless extension candidates. Maximal degree in co-relation 224613. Up to 3302 conditions per place. [2022-01-19 08:11:14,994 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 995 selfloop transitions, 4020 changer transitions 5/5074 dead transitions. [2022-01-19 08:11:14,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 5074 transitions, 147461 flow [2022-01-19 08:11:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-19 08:11:14,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-01-19 08:11:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5583 transitions. [2022-01-19 08:11:14,998 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7731616119651018 [2022-01-19 08:11:14,998 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5583 transitions. [2022-01-19 08:11:14,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5583 transitions. [2022-01-19 08:11:14,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:11:14,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5583 transitions. [2022-01-19 08:11:15,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 67.26506024096386) internal successors, (5583), 83 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:11:15,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:11:15,006 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:11:15,007 INFO L186 Difference]: Start difference. First operand has 923 places, 4694 transitions, 128059 flow. Second operand 83 states and 5583 transitions. [2022-01-19 08:11:15,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 5074 transitions, 147461 flow [2022-01-19 08:11:35,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 982 places, 5074 transitions, 144531 flow, removed 428 selfloop flow, removed 13 redundant places. [2022-01-19 08:11:35,374 INFO L242 Difference]: Finished difference. Result has 1000 places, 4898 transitions, 144382 flow [2022-01-19 08:11:35,378 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=124810, PETRI_DIFFERENCE_MINUEND_PLACES=900, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3796, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=144382, PETRI_PLACES=1000, PETRI_TRANSITIONS=4898} [2022-01-19 08:11:35,378 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 923 predicate places. [2022-01-19 08:11:35,378 INFO L470 AbstractCegarLoop]: Abstraction has has 1000 places, 4898 transitions, 144382 flow [2022-01-19 08:11:35,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.21052631578948) internal successors, (1239), 19 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:11:35,378 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:11:35,378 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:11:35,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-19 08:11:35,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:11:35,593 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:11:35,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:11:35,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1842044668, now seen corresponding path program 13 times [2022-01-19 08:11:35,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:11:35,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919737365] [2022-01-19 08:11:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:11:35,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:11:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:11:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:11:35,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:11:35,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919737365] [2022-01-19 08:11:35,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919737365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:11:35,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820940555] [2022-01-19 08:11:35,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:11:35,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:11:35,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:11:35,685 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:11:35,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 08:11:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:11:35,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:11:35,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:11:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:11:35,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:11:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:11:36,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820940555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:11:36,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:11:36,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 08:11:36,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010187099] [2022-01-19 08:11:36,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:11:36,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 08:11:36,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:11:36,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 08:11:36,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-19 08:11:36,031 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:11:36,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1000 places, 4898 transitions, 144382 flow. Second operand has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:11:36,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:11:36,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:11:36,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:12:13,985 INFO L129 PetriNetUnfolder]: 9677/27387 cut-off events. [2022-01-19 08:12:13,985 INFO L130 PetriNetUnfolder]: For 1464590/1464707 co-relation queries the response was YES. [2022-01-19 08:12:15,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 289404 conditions, 27387 events. 9677/27387 cut-off events. For 1464590/1464707 co-relation queries the response was YES. Maximal size of possible extension queue 2048. Compared 348540 event pairs, 826 based on Foata normal form. 76/27016 useless extension candidates. Maximal degree in co-relation 289142. Up to 3970 conditions per place. [2022-01-19 08:12:15,639 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 1046 selfloop transitions, 5220 changer transitions 3/6323 dead transitions. [2022-01-19 08:12:15,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1073 places, 6323 transitions, 197765 flow [2022-01-19 08:12:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-19 08:12:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-01-19 08:12:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5028 transitions. [2022-01-19 08:12:15,656 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7705747126436782 [2022-01-19 08:12:15,656 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5028 transitions. [2022-01-19 08:12:15,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5028 transitions. [2022-01-19 08:12:15,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:12:15,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5028 transitions. [2022-01-19 08:12:15,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 67.04) internal successors, (5028), 75 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:12:15,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:12:15,664 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:12:15,664 INFO L186 Difference]: Start difference. First operand has 1000 places, 4898 transitions, 144382 flow. Second operand 75 states and 5028 transitions. [2022-01-19 08:12:15,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1073 places, 6323 transitions, 197765 flow [2022-01-19 08:12:48,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1031 places, 6323 transitions, 196178 flow, removed 349 selfloop flow, removed 42 redundant places. [2022-01-19 08:12:48,763 INFO L242 Difference]: Finished difference. Result has 1061 places, 6201 transitions, 199570 flow [2022-01-19 08:12:48,767 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=142927, PETRI_DIFFERENCE_MINUEND_PLACES=957, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3918, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=199570, PETRI_PLACES=1061, PETRI_TRANSITIONS=6201} [2022-01-19 08:12:48,767 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 984 predicate places. [2022-01-19 08:12:48,767 INFO L470 AbstractCegarLoop]: Abstraction has has 1061 places, 6201 transitions, 199570 flow [2022-01-19 08:12:48,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:12:48,767 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:12:48,768 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:12:48,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-19 08:12:48,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:12:48,979 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:12:48,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:12:48,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1245142102, now seen corresponding path program 14 times [2022-01-19 08:12:48,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:12:48,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491637878] [2022-01-19 08:12:48,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:12:48,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:12:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:12:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:12:49,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:12:49,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491637878] [2022-01-19 08:12:49,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491637878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:12:49,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483695909] [2022-01-19 08:12:49,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:12:49,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:12:49,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:12:49,120 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:12:49,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-19 08:12:49,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:12:49,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:12:49,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:12:49,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:12:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:12:49,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:12:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:12:49,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483695909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:12:49,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:12:49,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:12:49,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004884435] [2022-01-19 08:12:49,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:12:49,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:12:49,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:12:49,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:12:49,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:12:49,474 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:12:49,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1061 places, 6201 transitions, 199570 flow. Second operand has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:12:49,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:12:49,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:12:49,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:13:55,569 INFO L129 PetriNetUnfolder]: 11284/31567 cut-off events. [2022-01-19 08:13:55,569 INFO L130 PetriNetUnfolder]: For 1918870/1919002 co-relation queries the response was YES. [2022-01-19 08:13:56,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 358158 conditions, 31567 events. 11284/31567 cut-off events. For 1918870/1919002 co-relation queries the response was YES. Maximal size of possible extension queue 2363. Compared 407731 event pairs, 544 based on Foata normal form. 62/31473 useless extension candidates. Maximal degree in co-relation 357871. Up to 4617 conditions per place. [2022-01-19 08:13:56,854 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 1195 selfloop transitions, 6481 changer transitions 17/7747 dead transitions. [2022-01-19 08:13:56,854 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1193 places, 7747 transitions, 264029 flow [2022-01-19 08:13:56,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-19 08:13:56,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2022-01-19 08:13:56,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 8829 transitions. [2022-01-19 08:13:56,859 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7630282603059373 [2022-01-19 08:13:56,859 INFO L72 ComplementDD]: Start complementDD. Operand 133 states and 8829 transitions. [2022-01-19 08:13:56,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 133 states and 8829 transitions. [2022-01-19 08:13:56,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:13:56,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 133 states and 8829 transitions. [2022-01-19 08:13:56,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 134 states, 133 states have (on average 66.38345864661655) internal successors, (8829), 133 states have internal predecessors, (8829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:13:56,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 134 states, 134 states have (on average 87.0) internal successors, (11658), 134 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:13:56,872 INFO L81 ComplementDD]: Finished complementDD. Result has 134 states, 134 states have (on average 87.0) internal successors, (11658), 134 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:13:56,872 INFO L186 Difference]: Start difference. First operand has 1061 places, 6201 transitions, 199570 flow. Second operand 133 states and 8829 transitions. [2022-01-19 08:13:56,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1193 places, 7747 transitions, 264029 flow [2022-01-19 08:14:43,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1186 places, 7747 transitions, 262866 flow, removed 507 selfloop flow, removed 7 redundant places. [2022-01-19 08:14:43,851 INFO L242 Difference]: Finished difference. Result has 1234 places, 7553 transitions, 267750 flow [2022-01-19 08:14:43,855 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=198740, PETRI_DIFFERENCE_MINUEND_PLACES=1054, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=133, PETRI_FLOW=267750, PETRI_PLACES=1234, PETRI_TRANSITIONS=7553} [2022-01-19 08:14:43,856 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1157 predicate places. [2022-01-19 08:14:43,856 INFO L470 AbstractCegarLoop]: Abstraction has has 1234 places, 7553 transitions, 267750 flow [2022-01-19 08:14:43,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:14:43,856 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:14:43,856 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:14:43,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-19 08:14:44,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:14:44,072 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:14:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:14:44,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1234851806, now seen corresponding path program 15 times [2022-01-19 08:14:44,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:14:44,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294737149] [2022-01-19 08:14:44,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:14:44,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:14:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:14:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:14:44,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:14:44,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294737149] [2022-01-19 08:14:44,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294737149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:14:44,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943291144] [2022-01-19 08:14:44,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:14:44,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:14:44,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:14:44,180 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:14:44,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-19 08:14:44,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 08:14:44,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:14:44,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:14:44,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:14:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:14:44,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:14:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:14:44,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943291144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:14:44,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:14:44,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 08:14:44,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685182393] [2022-01-19 08:14:44,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:14:44,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 08:14:44,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:14:44,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 08:14:44,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-19 08:14:44,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:14:44,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1234 places, 7553 transitions, 267750 flow. Second operand has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:14:44,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:14:44,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:14:44,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:16:04,649 INFO L129 PetriNetUnfolder]: 12045/33597 cut-off events. [2022-01-19 08:16:04,649 INFO L130 PetriNetUnfolder]: For 2364947/2365051 co-relation queries the response was YES. [2022-01-19 08:16:05,971 INFO L84 FinitePrefix]: Finished finitePrefix Result has 411839 conditions, 33597 events. 12045/33597 cut-off events. For 2364947/2365051 co-relation queries the response was YES. Maximal size of possible extension queue 2478. Compared 437048 event pairs, 1157 based on Foata normal form. 80/33163 useless extension candidates. Maximal degree in co-relation 411504. Up to 7782 conditions per place. [2022-01-19 08:16:06,211 INFO L132 encePairwiseOnDemand]: 76/87 looper letters, 1659 selfloop transitions, 6612 changer transitions 3/8328 dead transitions. [2022-01-19 08:16:06,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1319 places, 8328 transitions, 308389 flow [2022-01-19 08:16:06,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-19 08:16:06,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-01-19 08:16:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 5713 transitions. [2022-01-19 08:16:06,229 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7635658914728682 [2022-01-19 08:16:06,229 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 5713 transitions. [2022-01-19 08:16:06,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 5713 transitions. [2022-01-19 08:16:06,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:16:06,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 5713 transitions. [2022-01-19 08:16:06,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 66.43023255813954) internal successors, (5713), 86 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:16:06,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 87.0) internal successors, (7569), 87 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:16:06,267 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 87.0) internal successors, (7569), 87 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:16:06,267 INFO L186 Difference]: Start difference. First operand has 1234 places, 7553 transitions, 267750 flow. Second operand 86 states and 5713 transitions. [2022-01-19 08:16:06,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1319 places, 8328 transitions, 308389 flow [2022-01-19 08:17:15,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1281 places, 8328 transitions, 306882 flow, removed 512 selfloop flow, removed 38 redundant places. [2022-01-19 08:17:15,698 INFO L242 Difference]: Finished difference. Result has 1320 places, 8180 transitions, 313056 flow [2022-01-19 08:17:15,703 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=266127, PETRI_DIFFERENCE_MINUEND_PLACES=1196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6002, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=313056, PETRI_PLACES=1320, PETRI_TRANSITIONS=8180} [2022-01-19 08:17:15,703 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1243 predicate places. [2022-01-19 08:17:15,704 INFO L470 AbstractCegarLoop]: Abstraction has has 1320 places, 8180 transitions, 313056 flow [2022-01-19 08:17:15,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:17:15,704 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:17:15,704 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:17:15,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-19 08:17:15,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:17:15,907 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:17:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:17:15,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2011559796, now seen corresponding path program 16 times [2022-01-19 08:17:15,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:17:15,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422705113] [2022-01-19 08:17:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:17:15,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:17:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:17:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:17:15,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:17:15,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422705113] [2022-01-19 08:17:15,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422705113] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:17:15,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888498093] [2022-01-19 08:17:15,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:17:15,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:17:15,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:17:16,016 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:17:16,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-19 08:17:16,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:17:16,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:17:16,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:17:16,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:17:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:17:16,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:17:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:17:16,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888498093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:17:16,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:17:16,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-19 08:17:16,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792598940] [2022-01-19 08:17:16,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:17:16,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 08:17:16,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:17:16,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 08:17:16,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-01-19 08:17:16,430 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:17:16,430 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1320 places, 8180 transitions, 313056 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:17:16,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:17:16,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:17:16,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:18:45,033 INFO L129 PetriNetUnfolder]: 12071/33384 cut-off events. [2022-01-19 08:18:45,034 INFO L130 PetriNetUnfolder]: For 2712518/2712631 co-relation queries the response was YES. [2022-01-19 08:18:46,452 INFO L84 FinitePrefix]: Finished finitePrefix Result has 437774 conditions, 33384 events. 12071/33384 cut-off events. For 2712518/2712631 co-relation queries the response was YES. Maximal size of possible extension queue 2466. Compared 432206 event pairs, 1567 based on Foata normal form. 16/32699 useless extension candidates. Maximal degree in co-relation 437410. Up to 9770 conditions per place. [2022-01-19 08:18:46,864 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 4356 selfloop transitions, 3839 changer transitions 5/8254 dead transitions. [2022-01-19 08:18:46,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1352 places, 8254 transitions, 331718 flow [2022-01-19 08:18:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 08:18:46,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 08:18:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2230 transitions. [2022-01-19 08:18:46,866 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.776732845698363 [2022-01-19 08:18:46,866 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2230 transitions. [2022-01-19 08:18:46,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2230 transitions. [2022-01-19 08:18:46,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:18:46,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2230 transitions. [2022-01-19 08:18:46,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 67.57575757575758) internal successors, (2230), 33 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:18:46,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 87.0) internal successors, (2958), 34 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:18:46,869 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 87.0) internal successors, (2958), 34 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:18:46,869 INFO L186 Difference]: Start difference. First operand has 1320 places, 8180 transitions, 313056 flow. Second operand 33 states and 2230 transitions. [2022-01-19 08:18:46,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1352 places, 8254 transitions, 331718 flow [2022-01-19 08:20:26,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1335 places, 8254 transitions, 330970 flow, removed 206 selfloop flow, removed 17 redundant places. [2022-01-19 08:20:27,007 INFO L242 Difference]: Finished difference. Result has 1338 places, 8202 transitions, 321096 flow [2022-01-19 08:20:27,012 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=312314, PETRI_DIFFERENCE_MINUEND_PLACES=1303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3815, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=321096, PETRI_PLACES=1338, PETRI_TRANSITIONS=8202} [2022-01-19 08:20:27,012 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1261 predicate places. [2022-01-19 08:20:27,012 INFO L470 AbstractCegarLoop]: Abstraction has has 1338 places, 8202 transitions, 321096 flow [2022-01-19 08:20:27,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:20:27,013 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:20:27,013 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:20:27,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-19 08:20:27,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:20:27,229 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:20:27,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:20:27,229 INFO L85 PathProgramCache]: Analyzing trace with hash -257090374, now seen corresponding path program 17 times [2022-01-19 08:20:27,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:20:27,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480355821] [2022-01-19 08:20:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:20:27,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:20:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:20:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:20:27,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:20:27,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480355821] [2022-01-19 08:20:27,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480355821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:20:27,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060771315] [2022-01-19 08:20:27,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:20:27,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:20:27,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:20:27,312 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:20:27,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-19 08:20:27,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 08:20:27,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:20:27,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 08:20:27,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:20:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:20:27,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:20:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:20:27,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060771315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:20:27,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:20:27,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-19 08:20:27,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312432101] [2022-01-19 08:20:27,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:20:27,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 08:20:27,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:20:27,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 08:20:27,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-19 08:20:27,787 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 08:20:27,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1338 places, 8202 transitions, 321096 flow. Second operand has 22 states, 22 states have (on average 65.13636363636364) internal successors, (1433), 22 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:20:27,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:20:27,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 08:20:27,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:22:15,230 INFO L129 PetriNetUnfolder]: 14068/39471 cut-off events. [2022-01-19 08:22:15,230 INFO L130 PetriNetUnfolder]: For 3165906/3165934 co-relation queries the response was YES. [2022-01-19 08:22:18,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 516442 conditions, 39471 events. 14068/39471 cut-off events. For 3165906/3165934 co-relation queries the response was YES. Maximal size of possible extension queue 2956. Compared 529350 event pairs, 2265 based on Foata normal form. 40/38803 useless extension candidates. Maximal degree in co-relation 516076. Up to 9837 conditions per place. [2022-01-19 08:22:18,556 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 4273 selfloop transitions, 5601 changer transitions 6/9934 dead transitions. [2022-01-19 08:22:18,556 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1409 places, 9934 transitions, 407462 flow [2022-01-19 08:22:18,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-19 08:22:18,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-01-19 08:22:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 5078 transitions. [2022-01-19 08:22:18,572 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7679975801572898 [2022-01-19 08:22:18,572 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 5078 transitions. [2022-01-19 08:22:18,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 5078 transitions. [2022-01-19 08:22:18,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:22:18,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 5078 transitions. [2022-01-19 08:22:18,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 66.8157894736842) internal successors, (5078), 76 states have internal predecessors, (5078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:22:18,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 87.0) internal successors, (6699), 77 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:22:18,580 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 87.0) internal successors, (6699), 77 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:22:18,580 INFO L186 Difference]: Start difference. First operand has 1338 places, 8202 transitions, 321096 flow. Second operand 76 states and 5078 transitions. [2022-01-19 08:22:18,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1409 places, 9934 transitions, 407462 flow Received shutdown request... [2022-01-19 08:22:54,479 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 08:22:54,485 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 08:22:54,492 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 08:22:54,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-19 08:22:54,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:22:54,695 WARN L594 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-01-19 08:22:54,696 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 08:22:54,696 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 08:22:54,715 INFO L732 BasicCegarLoop]: Path program histogram: [17, 4, 1, 1] [2022-01-19 08:22:54,717 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 08:22:54,717 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 08:22:54,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 08:22:54 BasicIcfg [2022-01-19 08:22:54,718 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 08:22:54,719 INFO L158 Benchmark]: Toolchain (without parser) took 835580.99ms. Allocated memory was 392.2MB in the beginning and 7.0GB in the end (delta: 6.6GB). Free memory was 333.6MB in the beginning and 3.0GB in the end (delta: -2.7GB). Peak memory consumption was 4.8GB. Max. memory is 16.0GB. [2022-01-19 08:22:54,719 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 392.2MB. Free memory is still 350.3MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 08:22:54,719 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.67ms. Allocated memory was 392.2MB in the beginning and 564.1MB in the end (delta: 172.0MB). Free memory was 333.5MB in the beginning and 533.5MB in the end (delta: -200.1MB). Peak memory consumption was 8.5MB. Max. memory is 16.0GB. [2022-01-19 08:22:54,719 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.32ms. Allocated memory is still 564.1MB. Free memory was 533.5MB in the beginning and 531.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 08:22:54,719 INFO L158 Benchmark]: Boogie Preprocessor took 23.23ms. Allocated memory is still 564.1MB. Free memory was 531.4MB in the beginning and 530.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 08:22:54,719 INFO L158 Benchmark]: RCFGBuilder took 248.47ms. Allocated memory is still 564.1MB. Free memory was 530.4MB in the beginning and 515.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-19 08:22:54,720 INFO L158 Benchmark]: TraceAbstraction took 835038.68ms. Allocated memory was 564.1MB in the beginning and 7.0GB in the end (delta: 6.5GB). Free memory was 514.6MB in the beginning and 3.0GB in the end (delta: -2.5GB). Peak memory consumption was 4.8GB. Max. memory is 16.0GB. [2022-01-19 08:22:54,720 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 392.2MB. Free memory is still 350.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 240.67ms. Allocated memory was 392.2MB in the beginning and 564.1MB in the end (delta: 172.0MB). Free memory was 333.5MB in the beginning and 533.5MB in the end (delta: -200.1MB). Peak memory consumption was 8.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 25.32ms. Allocated memory is still 564.1MB. Free memory was 533.5MB in the beginning and 531.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.23ms. Allocated memory is still 564.1MB. Free memory was 531.4MB in the beginning and 530.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 248.47ms. Allocated memory is still 564.1MB. Free memory was 530.4MB in the beginning and 515.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 835038.68ms. Allocated memory was 564.1MB in the beginning and 7.0GB in the end (delta: 6.5GB). Free memory was 514.6MB in the beginning and 3.0GB in the end (delta: -2.5GB). Peak memory consumption was 4.8GB. 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: 76]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 102 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 834.9s, OverallIterations: 23, TraceHistogramMax: 2, PathProgramHistogramMax: 17, EmptinessCheckTime: 0.0s, AutomataDifference: 820.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4633 SdHoareTripleChecker+Valid, 7.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4633 mSDsluCounter, 3309 SdHoareTripleChecker+Invalid, 6.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5142 mSDsCounter, 988 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12456 IncrementalHoareTripleChecker+Invalid, 13444 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 988 mSolverCounterUnsat, 537 mSDtfsCounter, 12456 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4041 GetRequests, 2652 SyntacticMatches, 28 SemanticMatches, 1361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44419 ImplicationChecksByTransitivity, 22.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=321096occurred in iteration=22, InterpolantAutomatonStates: 1181, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 3050 NumberOfCodeBlocks, 2886 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 4389 ConstructedInterpolants, 0 QuantifiedInterpolants, 13805 SizeOfPredicates, 142 NumberOfNonLiveVariables, 2798 ConjunctsInSsa, 246 ConjunctsInUnsatCore, 61 InterpolantComputations, 5 PerfectInterpolantSequences, 272/398 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