/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.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 02:09:28,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 02:09:28,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 02:09:28,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 02:09:28,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 02:09:28,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 02:09:28,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 02:09:28,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 02:09:28,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 02:09:28,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 02:09:28,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 02:09:28,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 02:09:28,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 02:09:28,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 02:09:28,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 02:09:28,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 02:09:28,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 02:09:28,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 02:09:28,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 02:09:28,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 02:09:28,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 02:09:28,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 02:09:28,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 02:09:28,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 02:09:28,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 02:09:28,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 02:09:28,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 02:09:28,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 02:09:28,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 02:09:28,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 02:09:28,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 02:09:28,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 02:09:28,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 02:09:28,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 02:09:28,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 02:09:28,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 02:09:28,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 02:09:28,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 02:09:28,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 02:09:28,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 02:09:28,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 02:09:28,972 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.epf [2022-01-19 02:09:28,996 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 02:09:28,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 02:09:28,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 02:09:28,997 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 02:09:28,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 02:09:28,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 02:09:28,998 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 02:09:28,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 02:09:28,998 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 02:09:28,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 02:09:28,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 02:09:28,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 02:09:28,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 02:09:28,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 02:09:28,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 02:09:28,999 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 02:09:28,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 02:09:28,999 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 02:09:28,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 02:09:28,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 02:09:28,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 02:09:28,999 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 02:09:28,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 02:09:29,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 02:09:29,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 02:09:29,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 02:09:29,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 02:09:29,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 02:09:29,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 02:09:29,001 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 02:09:29,001 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 02:09:29,001 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 02:09:29,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 02:09:29,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 02:09:29,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 02:09:29,199 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 02:09:29,200 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 02:09:29,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-01-19 02:09:29,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/905bf90e2/af9248dc15a44b3a8588a9bce5ebacf6/FLAG49e4f6de6 [2022-01-19 02:09:29,527 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 02:09:29,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-01-19 02:09:29,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/905bf90e2/af9248dc15a44b3a8588a9bce5ebacf6/FLAG49e4f6de6 [2022-01-19 02:09:29,964 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/905bf90e2/af9248dc15a44b3a8588a9bce5ebacf6 [2022-01-19 02:09:29,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 02:09:29,966 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 02:09:29,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 02:09:29,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 02:09:29,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 02:09:29,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:09:29" (1/1) ... [2022-01-19 02:09:29,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ea00376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:09:29, skipping insertion in model container [2022-01-19 02:09:29,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:09:29" (1/1) ... [2022-01-19 02:09:29,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 02:09:29,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 02:09:30,122 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-01-19 02:09:30,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 02:09:30,128 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 02:09:30,150 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-01-19 02:09:30,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 02:09:30,159 INFO L208 MainTranslator]: Completed translation [2022-01-19 02:09:30,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:09:30 WrapperNode [2022-01-19 02:09:30,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 02:09:30,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 02:09:30,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 02:09:30,160 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 02:09:30,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:09:30" (1/1) ... [2022-01-19 02:09:30,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:09:30" (1/1) ... [2022-01-19 02:09:30,179 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-01-19 02:09:30,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 02:09:30,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 02:09:30,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 02:09:30,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 02:09:30,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:09:30" (1/1) ... [2022-01-19 02:09:30,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:09:30" (1/1) ... [2022-01-19 02:09:30,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:09:30" (1/1) ... [2022-01-19 02:09:30,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:09:30" (1/1) ... [2022-01-19 02:09:30,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:09:30" (1/1) ... [2022-01-19 02:09:30,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:09:30" (1/1) ... [2022-01-19 02:09:30,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:09:30" (1/1) ... [2022-01-19 02:09:30,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 02:09:30,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 02:09:30,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 02:09:30,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 02:09:30,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:09:30" (1/1) ... [2022-01-19 02:09:30,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 02:09:30,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:09:30,235 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 02:09:30,236 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 02:09:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 02:09:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 02:09:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 02:09:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 02:09:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 02:09:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 02:09:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 02:09:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 02:09:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 02:09:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 02:09:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 02:09:30,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 02:09:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 02:09:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 02:09:30,267 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 02:09:30,312 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 02:09:30,313 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 02:09:30,459 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 02:09:30,490 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 02:09:30,490 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 02:09:30,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:09:30 BoogieIcfgContainer [2022-01-19 02:09:30,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 02:09:30,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 02:09:30,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 02:09:30,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 02:09:30,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:09:29" (1/3) ... [2022-01-19 02:09:30,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b4da86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:09:30, skipping insertion in model container [2022-01-19 02:09:30,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:09:30" (2/3) ... [2022-01-19 02:09:30,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b4da86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:09:30, skipping insertion in model container [2022-01-19 02:09:30,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:09:30" (3/3) ... [2022-01-19 02:09:30,497 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-01-19 02:09:30,510 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 02:09:30,510 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 02:09:30,510 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 02:09:30,545 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,546 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,552 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,556 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,557 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,558 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,559 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,559 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,559 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,559 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,560 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,560 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,560 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,561 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,561 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,561 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,562 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,562 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,563 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,563 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,563 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,564 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,564 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,564 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,564 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,565 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,565 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,565 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,565 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,565 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,565 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,566 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,566 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,566 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,566 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,566 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,566 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,566 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,569 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,569 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,569 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,569 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,570 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:09:30,572 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 02:09:30,619 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 02:09:30,626 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 02:09:30,626 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 02:09:30,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-01-19 02:09:30,688 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-01-19 02:09:30,688 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 02:09:30,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-01-19 02:09:30,690 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-01-19 02:09:30,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-01-19 02:09:30,717 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2022-01-19 02:09:30,718 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 02:09:30,718 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:09:30,719 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 02:09:30,719 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:09:30,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:09:30,723 INFO L85 PathProgramCache]: Analyzing trace with hash 752027129, now seen corresponding path program 1 times [2022-01-19 02:09:30,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:09:30,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234745012] [2022-01-19 02:09:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:09:30,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:09:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:09:31,037 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 02:09:31,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:09:31,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234745012] [2022-01-19 02:09:31,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234745012] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:09:31,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:09:31,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 02:09:31,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655774972] [2022-01-19 02:09:31,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:09:31,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:09:31,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:09:31,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:09:31,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-19 02:09:31,077 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2022-01-19 02:09:31,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:31,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:09:31,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2022-01-19 02:09:31,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:09:31,179 INFO L129 PetriNetUnfolder]: 34/134 cut-off events. [2022-01-19 02:09:31,180 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-01-19 02:09:31,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 134 events. 34/134 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 294 event pairs, 9 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 136. Up to 49 conditions per place. [2022-01-19 02:09:31,183 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 20 selfloop transitions, 5 changer transitions 2/74 dead transitions. [2022-01-19 02:09:31,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 217 flow [2022-01-19 02:09:31,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:09:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:09:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 376 transitions. [2022-01-19 02:09:31,199 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2022-01-19 02:09:31,203 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 376 transitions. [2022-01-19 02:09:31,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 376 transitions. [2022-01-19 02:09:31,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:09:31,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 376 transitions. [2022-01-19 02:09:31,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.666666666666664) internal successors, (376), 6 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:31,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:31,218 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:31,219 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 6 states and 376 transitions. [2022-01-19 02:09:31,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 217 flow [2022-01-19 02:09:31,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 207 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 02:09:31,235 INFO L242 Difference]: Finished difference. Result has 76 places, 68 transitions, 156 flow [2022-01-19 02:09:31,237 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2022-01-19 02:09:31,240 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2022-01-19 02:09:31,240 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 156 flow [2022-01-19 02:09:31,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:31,241 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:09:31,241 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:09:31,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 02:09:31,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:09:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:09:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash -676251899, now seen corresponding path program 1 times [2022-01-19 02:09:31,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:09:31,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783196732] [2022-01-19 02:09:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:09:31,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:09:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:09:31,359 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 02:09:31,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:09:31,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783196732] [2022-01-19 02:09:31,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783196732] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:09:31,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:09:31,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 02:09:31,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998212801] [2022-01-19 02:09:31,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:09:31,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 02:09:31,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:09:31,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 02:09:31,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-19 02:09:31,362 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 84 [2022-01-19 02:09:31,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:31,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:09:31,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 84 [2022-01-19 02:09:31,363 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:09:31,449 INFO L129 PetriNetUnfolder]: 61/239 cut-off events. [2022-01-19 02:09:31,449 INFO L130 PetriNetUnfolder]: For 23/37 co-relation queries the response was YES. [2022-01-19 02:09:31,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 239 events. 61/239 cut-off events. For 23/37 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 908 event pairs, 26 based on Foata normal form. 12/236 useless extension candidates. Maximal degree in co-relation 220. Up to 75 conditions per place. [2022-01-19 02:09:31,451 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 25 selfloop transitions, 5 changer transitions 1/83 dead transitions. [2022-01-19 02:09:31,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 83 transitions, 266 flow [2022-01-19 02:09:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 02:09:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 02:09:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2022-01-19 02:09:31,454 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.830952380952381 [2022-01-19 02:09:31,455 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2022-01-19 02:09:31,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2022-01-19 02:09:31,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:09:31,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2022-01-19 02:09:31,456 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 02:09:31,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:31,457 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:31,457 INFO L186 Difference]: Start difference. First operand has 76 places, 68 transitions, 156 flow. Second operand 5 states and 349 transitions. [2022-01-19 02:09:31,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 83 transitions, 266 flow [2022-01-19 02:09:31,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 256 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 02:09:31,460 INFO L242 Difference]: Finished difference. Result has 76 places, 70 transitions, 172 flow [2022-01-19 02:09:31,460 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2022-01-19 02:09:31,461 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2022-01-19 02:09:31,461 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 172 flow [2022-01-19 02:09:31,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:31,461 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:09:31,461 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:09:31,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 02:09:31,462 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:09:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:09:31,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1495906757, now seen corresponding path program 2 times [2022-01-19 02:09:31,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:09:31,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746300392] [2022-01-19 02:09:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:09:31,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:09:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:09:31,596 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 02:09:31,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:09:31,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746300392] [2022-01-19 02:09:31,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746300392] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:09:31,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962791264] [2022-01-19 02:09:31,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:09:31,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:31,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:09:31,599 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 02:09:31,600 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 02:09:31,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-19 02:09:31,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:09:31,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 02:09:31,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:09:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:09:31,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 02:09:31,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962791264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:09:31,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 02:09:31,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-01-19 02:09:31,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860687132] [2022-01-19 02:09:31,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:09:31,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:09:31,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:09:31,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:09:31,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-19 02:09:31,879 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-01-19 02:09:31,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:31,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:09:31,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-01-19 02:09:31,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:09:32,006 INFO L129 PetriNetUnfolder]: 54/189 cut-off events. [2022-01-19 02:09:32,007 INFO L130 PetriNetUnfolder]: For 59/66 co-relation queries the response was YES. [2022-01-19 02:09:32,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 189 events. 54/189 cut-off events. For 59/66 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 594 event pairs, 24 based on Foata normal form. 13/198 useless extension candidates. Maximal degree in co-relation 250. Up to 73 conditions per place. [2022-01-19 02:09:32,008 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 24 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2022-01-19 02:09:32,008 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 251 flow [2022-01-19 02:09:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 02:09:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 02:09:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2022-01-19 02:09:32,010 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6994047619047619 [2022-01-19 02:09:32,010 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2022-01-19 02:09:32,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2022-01-19 02:09:32,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:09:32,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2022-01-19 02:09:32,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:32,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:32,012 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:32,013 INFO L186 Difference]: Start difference. First operand has 76 places, 70 transitions, 172 flow. Second operand 8 states and 470 transitions. [2022-01-19 02:09:32,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 251 flow [2022-01-19 02:09:32,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 02:09:32,015 INFO L242 Difference]: Finished difference. Result has 79 places, 69 transitions, 172 flow [2022-01-19 02:09:32,015 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2022-01-19 02:09:32,015 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2022-01-19 02:09:32,015 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 172 flow [2022-01-19 02:09:32,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:32,016 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:09:32,016 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:09:32,035 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 02:09:32,232 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 02:09:32,233 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:09:32,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:09:32,233 INFO L85 PathProgramCache]: Analyzing trace with hash 352825635, now seen corresponding path program 1 times [2022-01-19 02:09:32,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:09:32,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253362649] [2022-01-19 02:09:32,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:09:32,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:09:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:09:32,391 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 02:09:32,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:09:32,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253362649] [2022-01-19 02:09:32,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253362649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:09:32,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33370483] [2022-01-19 02:09:32,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:09:32,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:32,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:09:32,395 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 02:09:32,397 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 02:09:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:09:32,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 02:09:32,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:09:32,656 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 02:09:32,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:09:32,873 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 02:09:32,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33370483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:09:32,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:09:32,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 13 [2022-01-19 02:09:32,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881738846] [2022-01-19 02:09:32,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:09:32,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 02:09:32,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:09:32,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 02:09:32,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-19 02:09:32,876 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-01-19 02:09:32,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 56.84615384615385) internal successors, (739), 13 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:32,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:09:32,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-01-19 02:09:32,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:09:33,118 INFO L129 PetriNetUnfolder]: 138/484 cut-off events. [2022-01-19 02:09:33,118 INFO L130 PetriNetUnfolder]: For 114/121 co-relation queries the response was YES. [2022-01-19 02:09:33,120 INFO L84 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 484 events. 138/484 cut-off events. For 114/121 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2579 event pairs, 21 based on Foata normal form. 13/482 useless extension candidates. Maximal degree in co-relation 445. Up to 80 conditions per place. [2022-01-19 02:09:33,121 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 56 selfloop transitions, 23 changer transitions 18/141 dead transitions. [2022-01-19 02:09:33,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 141 transitions, 580 flow [2022-01-19 02:09:33,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 02:09:33,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 02:09:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 944 transitions. [2022-01-19 02:09:33,123 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2022-01-19 02:09:33,124 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 944 transitions. [2022-01-19 02:09:33,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 944 transitions. [2022-01-19 02:09:33,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:09:33,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 944 transitions. [2022-01-19 02:09:33,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.0) internal successors, (944), 16 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:33,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:33,127 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:33,128 INFO L186 Difference]: Start difference. First operand has 79 places, 69 transitions, 172 flow. Second operand 16 states and 944 transitions. [2022-01-19 02:09:33,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 141 transitions, 580 flow [2022-01-19 02:09:33,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 141 transitions, 558 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-01-19 02:09:33,131 INFO L242 Difference]: Finished difference. Result has 102 places, 92 transitions, 354 flow [2022-01-19 02:09:33,131 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=354, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2022-01-19 02:09:33,131 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 28 predicate places. [2022-01-19 02:09:33,131 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 354 flow [2022-01-19 02:09:33,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.84615384615385) internal successors, (739), 13 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:33,132 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:09:33,132 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:09:33,153 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 02:09:33,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-19 02:09:33,348 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:09:33,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:09:33,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1408734365, now seen corresponding path program 2 times [2022-01-19 02:09:33,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:09:33,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003827561] [2022-01-19 02:09:33,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:09:33,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:09:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:09:33,503 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 02:09:33,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:09:33,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003827561] [2022-01-19 02:09:33,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003827561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:09:33,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621293891] [2022-01-19 02:09:33,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:09:33,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:33,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:09:33,506 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 02:09:33,507 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 02:09:33,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:09:33,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:09:33,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:09:33,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:09:33,770 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 02:09:33,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:09:34,038 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 02:09:34,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621293891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:09:34,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:09:34,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2022-01-19 02:09:34,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149791113] [2022-01-19 02:09:34,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:09:34,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 02:09:34,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:09:34,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 02:09:34,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-19 02:09:34,041 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:09:34,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 354 flow. Second operand has 16 states, 16 states have (on average 64.25) internal successors, (1028), 16 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:34,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:09:34,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:09:34,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:09:34,691 INFO L129 PetriNetUnfolder]: 339/894 cut-off events. [2022-01-19 02:09:34,691 INFO L130 PetriNetUnfolder]: For 1635/1638 co-relation queries the response was YES. [2022-01-19 02:09:34,693 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2808 conditions, 894 events. 339/894 cut-off events. For 1635/1638 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5089 event pairs, 9 based on Foata normal form. 18/911 useless extension candidates. Maximal degree in co-relation 2779. Up to 186 conditions per place. [2022-01-19 02:09:34,697 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 78 selfloop transitions, 104 changer transitions 10/251 dead transitions. [2022-01-19 02:09:34,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 251 transitions, 1675 flow [2022-01-19 02:09:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-19 02:09:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-01-19 02:09:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2124 transitions. [2022-01-19 02:09:34,701 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7901785714285714 [2022-01-19 02:09:34,701 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2124 transitions. [2022-01-19 02:09:34,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2124 transitions. [2022-01-19 02:09:34,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:09:34,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2124 transitions. [2022-01-19 02:09:34,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 66.375) internal successors, (2124), 32 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:34,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:34,711 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:34,711 INFO L186 Difference]: Start difference. First operand has 102 places, 92 transitions, 354 flow. Second operand 32 states and 2124 transitions. [2022-01-19 02:09:34,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 251 transitions, 1675 flow [2022-01-19 02:09:34,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 251 transitions, 1667 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-01-19 02:09:34,726 INFO L242 Difference]: Finished difference. Result has 146 places, 179 transitions, 1339 flow [2022-01-19 02:09:34,727 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1339, PETRI_PLACES=146, PETRI_TRANSITIONS=179} [2022-01-19 02:09:34,729 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 72 predicate places. [2022-01-19 02:09:34,729 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 179 transitions, 1339 flow [2022-01-19 02:09:34,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.25) internal successors, (1028), 16 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:34,729 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:09:34,729 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:09:34,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 02:09:34,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:34,943 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:09:34,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:09:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1501259667, now seen corresponding path program 3 times [2022-01-19 02:09:34,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:09:34,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379511642] [2022-01-19 02:09:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:09:34,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:09:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:09:35,031 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 02:09:35,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:09:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379511642] [2022-01-19 02:09:35,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379511642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:09:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50855747] [2022-01-19 02:09:35,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:09:35,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:35,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:09:35,034 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 02:09:35,035 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 02:09:35,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 02:09:35,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:09:35,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:09:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:09:35,305 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 02:09:35,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:09:35,846 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 02:09:35,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50855747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:09:35,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:09:35,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 02:09:35,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515093348] [2022-01-19 02:09:35,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:09:35,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 02:09:35,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:09:35,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 02:09:35,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-19 02:09:35,848 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:09:35,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 179 transitions, 1339 flow. Second operand has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:35,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:09:35,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:09:35,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:09:36,537 INFO L129 PetriNetUnfolder]: 429/1093 cut-off events. [2022-01-19 02:09:36,537 INFO L130 PetriNetUnfolder]: For 8495/8502 co-relation queries the response was YES. [2022-01-19 02:09:36,542 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5644 conditions, 1093 events. 429/1093 cut-off events. For 8495/8502 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6293 event pairs, 7 based on Foata normal form. 4/1094 useless extension candidates. Maximal degree in co-relation 5448. Up to 278 conditions per place. [2022-01-19 02:09:36,548 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 132 selfloop transitions, 199 changer transitions 4/394 dead transitions. [2022-01-19 02:09:36,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 394 transitions, 4442 flow [2022-01-19 02:09:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-19 02:09:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-01-19 02:09:36,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1973 transitions. [2022-01-19 02:09:36,551 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7829365079365079 [2022-01-19 02:09:36,551 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1973 transitions. [2022-01-19 02:09:36,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1973 transitions. [2022-01-19 02:09:36,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:09:36,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1973 transitions. [2022-01-19 02:09:36,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 65.76666666666667) internal successors, (1973), 30 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:36,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:36,558 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:36,558 INFO L186 Difference]: Start difference. First operand has 146 places, 179 transitions, 1339 flow. Second operand 30 states and 1973 transitions. [2022-01-19 02:09:36,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 394 transitions, 4442 flow [2022-01-19 02:09:36,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 394 transitions, 4170 flow, removed 129 selfloop flow, removed 2 redundant places. [2022-01-19 02:09:36,597 INFO L242 Difference]: Finished difference. Result has 190 places, 328 transitions, 3650 flow [2022-01-19 02:09:36,597 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3650, PETRI_PLACES=190, PETRI_TRANSITIONS=328} [2022-01-19 02:09:36,598 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 116 predicate places. [2022-01-19 02:09:36,598 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 328 transitions, 3650 flow [2022-01-19 02:09:36,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:36,598 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:09:36,598 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:09:36,616 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 02:09:36,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:36,815 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:09:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:09:36,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1484681127, now seen corresponding path program 4 times [2022-01-19 02:09:36,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:09:36,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925984353] [2022-01-19 02:09:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:09:36,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:09:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:09:36,916 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 02:09:36,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:09:36,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925984353] [2022-01-19 02:09:36,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925984353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:09:36,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935052449] [2022-01-19 02:09:36,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:09:36,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:36,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:09:36,917 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 02:09:36,918 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 02:09:36,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:09:36,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:09:36,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:09:36,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:09:37,166 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 02:09:37,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:09:37,669 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 02:09:37,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935052449] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:09:37,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:09:37,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-01-19 02:09:37,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220174585] [2022-01-19 02:09:37,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:09:37,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 02:09:37,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:09:37,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 02:09:37,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-01-19 02:09:37,671 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:09:37,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 328 transitions, 3650 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:37,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:09:37,672 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:09:37,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:09:38,278 INFO L129 PetriNetUnfolder]: 565/1466 cut-off events. [2022-01-19 02:09:38,278 INFO L130 PetriNetUnfolder]: For 16785/16799 co-relation queries the response was YES. [2022-01-19 02:09:38,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8985 conditions, 1466 events. 565/1466 cut-off events. For 16785/16799 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9358 event pairs, 14 based on Foata normal form. 8/1471 useless extension candidates. Maximal degree in co-relation 8675. Up to 356 conditions per place. [2022-01-19 02:09:38,294 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 145 selfloop transitions, 272 changer transitions 6/482 dead transitions. [2022-01-19 02:09:38,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 482 transitions, 6693 flow [2022-01-19 02:09:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-19 02:09:38,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-01-19 02:09:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1451 transitions. [2022-01-19 02:09:38,297 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7851731601731602 [2022-01-19 02:09:38,297 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1451 transitions. [2022-01-19 02:09:38,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1451 transitions. [2022-01-19 02:09:38,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:09:38,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1451 transitions. [2022-01-19 02:09:38,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.95454545454545) internal successors, (1451), 22 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:38,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:38,302 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:38,302 INFO L186 Difference]: Start difference. First operand has 190 places, 328 transitions, 3650 flow. Second operand 22 states and 1451 transitions. [2022-01-19 02:09:38,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 482 transitions, 6693 flow [2022-01-19 02:09:38,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 482 transitions, 5998 flow, removed 232 selfloop flow, removed 11 redundant places. [2022-01-19 02:09:38,370 INFO L242 Difference]: Finished difference. Result has 209 places, 433 transitions, 5722 flow [2022-01-19 02:09:38,370 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5722, PETRI_PLACES=209, PETRI_TRANSITIONS=433} [2022-01-19 02:09:38,371 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 135 predicate places. [2022-01-19 02:09:38,371 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 433 transitions, 5722 flow [2022-01-19 02:09:38,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:38,371 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:09:38,372 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:09:38,390 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 02:09:38,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:38,572 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:09:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:09:38,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1139541701, now seen corresponding path program 5 times [2022-01-19 02:09:38,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:09:38,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109489145] [2022-01-19 02:09:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:09:38,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:09:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:09:38,786 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 02:09:38,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:09:38,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109489145] [2022-01-19 02:09:38,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109489145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:09:38,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556092347] [2022-01-19 02:09:38,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:09:38,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:38,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:09:38,788 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 02:09:38,789 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 02:09:38,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:09:38,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:09:38,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:09:38,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:09:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:09:39,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:09:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:09:39,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556092347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:09:39,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:09:39,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2022-01-19 02:09:39,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951120381] [2022-01-19 02:09:39,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:09:39,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 02:09:39,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:09:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 02:09:39,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-19 02:09:39,393 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:09:39,394 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 433 transitions, 5722 flow. Second operand has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:39,394 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:09:39,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:09:39,394 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:09:43,195 INFO L129 PetriNetUnfolder]: 744/2072 cut-off events. [2022-01-19 02:09:43,195 INFO L130 PetriNetUnfolder]: For 22908/22916 co-relation queries the response was YES. [2022-01-19 02:09:43,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11960 conditions, 2072 events. 744/2072 cut-off events. For 22908/22916 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15157 event pairs, 13 based on Foata normal form. 26/2087 useless extension candidates. Maximal degree in co-relation 11614. Up to 464 conditions per place. [2022-01-19 02:09:43,223 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 125 selfloop transitions, 575 changer transitions 4/763 dead transitions. [2022-01-19 02:09:43,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 763 transitions, 12180 flow [2022-01-19 02:09:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-19 02:09:43,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-01-19 02:09:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5211 transitions. [2022-01-19 02:09:43,231 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7754464285714285 [2022-01-19 02:09:43,231 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5211 transitions. [2022-01-19 02:09:43,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5211 transitions. [2022-01-19 02:09:43,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:09:43,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5211 transitions. [2022-01-19 02:09:43,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 65.1375) internal successors, (5211), 80 states have internal predecessors, (5211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:43,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 84.0) internal successors, (6804), 81 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:43,258 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 84.0) internal successors, (6804), 81 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:43,258 INFO L186 Difference]: Start difference. First operand has 209 places, 433 transitions, 5722 flow. Second operand 80 states and 5211 transitions. [2022-01-19 02:09:43,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 763 transitions, 12180 flow [2022-01-19 02:09:43,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 763 transitions, 11762 flow, removed 201 selfloop flow, removed 3 redundant places. [2022-01-19 02:09:43,361 INFO L242 Difference]: Finished difference. Result has 295 places, 683 transitions, 10861 flow [2022-01-19 02:09:43,362 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5548, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=10861, PETRI_PLACES=295, PETRI_TRANSITIONS=683} [2022-01-19 02:09:43,363 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 221 predicate places. [2022-01-19 02:09:43,363 INFO L470 AbstractCegarLoop]: Abstraction has has 295 places, 683 transitions, 10861 flow [2022-01-19 02:09:43,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:43,364 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:09:43,364 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:09:43,384 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 02:09:43,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:43,572 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:09:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:09:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash 115301975, now seen corresponding path program 6 times [2022-01-19 02:09:43,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:09:43,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735847106] [2022-01-19 02:09:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:09:43,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:09:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:09:43,659 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 02:09:43,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:09:43,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735847106] [2022-01-19 02:09:43,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735847106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:09:43,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134790465] [2022-01-19 02:09:43,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:09:43,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:43,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:09:43,660 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 02:09:43,661 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 02:09:43,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 02:09:43,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:09:43,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:09:43,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:09:43,934 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 02:09:43,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:09:44,453 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 02:09:44,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134790465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:09:44,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:09:44,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 02:09:44,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57378924] [2022-01-19 02:09:44,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:09:44,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 02:09:44,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:09:44,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 02:09:44,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-01-19 02:09:44,455 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:09:44,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 683 transitions, 10861 flow. Second operand has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:44,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:09:44,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:09:44,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:09:45,707 INFO L129 PetriNetUnfolder]: 893/2411 cut-off events. [2022-01-19 02:09:45,707 INFO L130 PetriNetUnfolder]: For 28464/28474 co-relation queries the response was YES. [2022-01-19 02:09:45,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15655 conditions, 2411 events. 893/2411 cut-off events. For 28464/28474 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18368 event pairs, 18 based on Foata normal form. 11/2409 useless extension candidates. Maximal degree in co-relation 15504. Up to 573 conditions per place. [2022-01-19 02:09:45,737 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 258 selfloop transitions, 535 changer transitions 3/855 dead transitions. [2022-01-19 02:09:45,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 855 transitions, 15612 flow [2022-01-19 02:09:45,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-19 02:09:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-01-19 02:09:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2315 transitions. [2022-01-19 02:09:45,740 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7874149659863946 [2022-01-19 02:09:45,740 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2315 transitions. [2022-01-19 02:09:45,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2315 transitions. [2022-01-19 02:09:45,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:09:45,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2315 transitions. [2022-01-19 02:09:45,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 66.14285714285714) internal successors, (2315), 35 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:45,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:45,747 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:45,747 INFO L186 Difference]: Start difference. First operand has 295 places, 683 transitions, 10861 flow. Second operand 35 states and 2315 transitions. [2022-01-19 02:09:45,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 855 transitions, 15612 flow [2022-01-19 02:09:45,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 855 transitions, 13786 flow, removed 797 selfloop flow, removed 13 redundant places. [2022-01-19 02:09:45,922 INFO L242 Difference]: Finished difference. Result has 324 places, 791 transitions, 13091 flow [2022-01-19 02:09:45,922 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=9443, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13091, PETRI_PLACES=324, PETRI_TRANSITIONS=791} [2022-01-19 02:09:45,923 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 250 predicate places. [2022-01-19 02:09:45,923 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 791 transitions, 13091 flow [2022-01-19 02:09:45,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:45,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:09:45,924 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:09:45,940 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 02:09:46,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:46,134 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:09:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:09:46,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1392148443, now seen corresponding path program 7 times [2022-01-19 02:09:46,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:09:46,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426138997] [2022-01-19 02:09:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:09:46,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:09:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:09:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:09:46,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:09:46,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426138997] [2022-01-19 02:09:46,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426138997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:09:46,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073016807] [2022-01-19 02:09:46,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:09:46,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:46,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:09:46,304 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 02:09:46,304 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 02:09:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:09:46,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:09:46,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:09:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:09:46,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:09:47,038 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 02:09:47,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073016807] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:09:47,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:09:47,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 02:09:47,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22861966] [2022-01-19 02:09:47,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:09:47,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 02:09:47,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:09:47,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 02:09:47,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-01-19 02:09:47,040 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:09:47,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 791 transitions, 13091 flow. Second operand has 19 states, 19 states have (on average 64.47368421052632) internal successors, (1225), 19 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:47,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:09:47,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:09:47,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:09:48,861 INFO L129 PetriNetUnfolder]: 1325/3751 cut-off events. [2022-01-19 02:09:48,861 INFO L130 PetriNetUnfolder]: For 38022/38032 co-relation queries the response was YES. [2022-01-19 02:09:48,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24373 conditions, 3751 events. 1325/3751 cut-off events. For 38022/38032 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 32178 event pairs, 26 based on Foata normal form. 42/3772 useless extension candidates. Maximal degree in co-relation 23940. Up to 842 conditions per place. [2022-01-19 02:09:48,909 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 307 selfloop transitions, 965 changer transitions 1/1332 dead transitions. [2022-01-19 02:09:48,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1332 transitions, 24881 flow [2022-01-19 02:09:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 02:09:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 02:09:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2724 transitions. [2022-01-19 02:09:48,920 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7909407665505227 [2022-01-19 02:09:48,920 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2724 transitions. [2022-01-19 02:09:48,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2724 transitions. [2022-01-19 02:09:48,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:09:48,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2724 transitions. [2022-01-19 02:09:48,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 66.4390243902439) internal successors, (2724), 41 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:48,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:48,934 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:48,935 INFO L186 Difference]: Start difference. First operand has 324 places, 791 transitions, 13091 flow. Second operand 41 states and 2724 transitions. [2022-01-19 02:09:48,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1332 transitions, 24881 flow [2022-01-19 02:09:49,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1332 transitions, 24531 flow, removed 76 selfloop flow, removed 13 redundant places. [2022-01-19 02:09:49,219 INFO L242 Difference]: Finished difference. Result has 366 places, 1202 transitions, 24247 flow [2022-01-19 02:09:49,220 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=12841, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=24247, PETRI_PLACES=366, PETRI_TRANSITIONS=1202} [2022-01-19 02:09:49,220 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 292 predicate places. [2022-01-19 02:09:49,220 INFO L470 AbstractCegarLoop]: Abstraction has has 366 places, 1202 transitions, 24247 flow [2022-01-19 02:09:49,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.47368421052632) internal successors, (1225), 19 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:49,221 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:09:49,221 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:09:49,238 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 02:09:49,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-19 02:09:49,433 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:09:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:09:49,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1798251347, now seen corresponding path program 8 times [2022-01-19 02:09:49,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:09:49,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908523798] [2022-01-19 02:09:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:09:49,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:09:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:09:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:09:49,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:09:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908523798] [2022-01-19 02:09:49,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908523798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:09:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718673769] [2022-01-19 02:09:49,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:09:49,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:49,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:09:49,581 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 02:09:49,583 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 02:09:49,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:09:49,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:09:49,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:09:49,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:09:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:09:49,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:09:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:09:50,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718673769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:09:50,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:09:50,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-01-19 02:09:50,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209404935] [2022-01-19 02:09:50,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:09:50,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 02:09:50,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:09:50,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 02:09:50,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-19 02:09:50,351 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:09:50,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1202 transitions, 24247 flow. Second operand has 18 states, 18 states have (on average 64.61111111111111) internal successors, (1163), 18 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:50,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:09:50,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:09:50,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:09:54,507 INFO L129 PetriNetUnfolder]: 1730/5158 cut-off events. [2022-01-19 02:09:54,508 INFO L130 PetriNetUnfolder]: For 67516/67527 co-relation queries the response was YES. [2022-01-19 02:09:54,542 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36918 conditions, 5158 events. 1730/5158 cut-off events. For 67516/67527 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 48799 event pairs, 32 based on Foata normal form. 50/5185 useless extension candidates. Maximal degree in co-relation 36457. Up to 1021 conditions per place. [2022-01-19 02:09:54,569 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 290 selfloop transitions, 1430 changer transitions 1/1780 dead transitions. [2022-01-19 02:09:54,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1780 transitions, 38888 flow [2022-01-19 02:09:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-19 02:09:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-01-19 02:09:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4884 transitions. [2022-01-19 02:09:54,573 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-01-19 02:09:54,573 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4884 transitions. [2022-01-19 02:09:54,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4884 transitions. [2022-01-19 02:09:54,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:09:54,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4884 transitions. [2022-01-19 02:09:54,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 66.0) internal successors, (4884), 74 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:54,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 84.0) internal successors, (6300), 75 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:54,583 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 84.0) internal successors, (6300), 75 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:54,584 INFO L186 Difference]: Start difference. First operand has 366 places, 1202 transitions, 24247 flow. Second operand 74 states and 4884 transitions. [2022-01-19 02:09:54,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1780 transitions, 38888 flow [2022-01-19 02:09:55,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1780 transitions, 38263 flow, removed 281 selfloop flow, removed 6 redundant places. [2022-01-19 02:09:55,265 INFO L242 Difference]: Finished difference. Result has 456 places, 1692 transitions, 38936 flow [2022-01-19 02:09:55,266 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=23841, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=996, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=38936, PETRI_PLACES=456, PETRI_TRANSITIONS=1692} [2022-01-19 02:09:55,266 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 382 predicate places. [2022-01-19 02:09:55,266 INFO L470 AbstractCegarLoop]: Abstraction has has 456 places, 1692 transitions, 38936 flow [2022-01-19 02:09:55,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.61111111111111) internal successors, (1163), 18 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:55,266 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:09:55,266 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:09:55,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-19 02:09:55,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:55,467 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:09:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:09:55,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1780276453, now seen corresponding path program 9 times [2022-01-19 02:09:55,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:09:55,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924304836] [2022-01-19 02:09:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:09:55,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:09:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:09:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:09:55,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:09:55,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924304836] [2022-01-19 02:09:55,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924304836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:09:55,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028482350] [2022-01-19 02:09:55,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:09:55,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:09:55,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:09:55,569 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 02:09:55,570 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 02:09:55,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 02:09:55,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:09:55,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:09:55,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:09:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:09:55,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:09:56,178 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 02:09:56,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028482350] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:09:56,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:09:56,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-01-19 02:09:56,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939468293] [2022-01-19 02:09:56,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:09:56,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 02:09:56,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:09:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 02:09:56,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-19 02:09:56,180 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:09:56,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 1692 transitions, 38936 flow. Second operand has 17 states, 17 states have (on average 64.3529411764706) internal successors, (1094), 17 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:09:56,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:09:56,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:09:56,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:10:01,635 INFO L129 PetriNetUnfolder]: 2165/6901 cut-off events. [2022-01-19 02:10:01,635 INFO L130 PetriNetUnfolder]: For 109212/109246 co-relation queries the response was YES. [2022-01-19 02:10:01,699 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53927 conditions, 6901 events. 2165/6901 cut-off events. For 109212/109246 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 71029 event pairs, 51 based on Foata normal form. 48/6919 useless extension candidates. Maximal degree in co-relation 53539. Up to 1270 conditions per place. [2022-01-19 02:10:01,734 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 341 selfloop transitions, 1813 changer transitions 6/2219 dead transitions. [2022-01-19 02:10:01,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 2219 transitions, 55344 flow [2022-01-19 02:10:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-19 02:10:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-01-19 02:10:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4529 transitions. [2022-01-19 02:10:01,738 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7814009661835749 [2022-01-19 02:10:01,738 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4529 transitions. [2022-01-19 02:10:01,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4529 transitions. [2022-01-19 02:10:01,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:10:01,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4529 transitions. [2022-01-19 02:10:01,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 65.6376811594203) internal successors, (4529), 69 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:10:01,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 84.0) internal successors, (5880), 70 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:10:01,748 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 84.0) internal successors, (5880), 70 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:10:01,748 INFO L186 Difference]: Start difference. First operand has 456 places, 1692 transitions, 38936 flow. Second operand 69 states and 4529 transitions. [2022-01-19 02:10:01,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 2219 transitions, 55344 flow [2022-01-19 02:10:03,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 2219 transitions, 54174 flow, removed 373 selfloop flow, removed 12 redundant places. [2022-01-19 02:10:03,574 INFO L242 Difference]: Finished difference. Result has 534 places, 2128 transitions, 55517 flow [2022-01-19 02:10:03,576 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=38095, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=55517, PETRI_PLACES=534, PETRI_TRANSITIONS=2128} [2022-01-19 02:10:03,576 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 460 predicate places. [2022-01-19 02:10:03,576 INFO L470 AbstractCegarLoop]: Abstraction has has 534 places, 2128 transitions, 55517 flow [2022-01-19 02:10:03,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.3529411764706) internal successors, (1094), 17 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:10:03,576 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:10:03,576 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:10:03,592 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 02:10:03,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 02:10:03,777 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:10:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:10:03,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1526211693, now seen corresponding path program 10 times [2022-01-19 02:10:03,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:10:03,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109392027] [2022-01-19 02:10:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:10:03,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:10:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:10:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:10:03,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:10:03,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109392027] [2022-01-19 02:10:03,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109392027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:10:03,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631506057] [2022-01-19 02:10:03,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:10:03,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:10:03,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:10:03,871 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 02:10:03,872 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 02:10:03,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:10:03,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:10:03,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:10:03,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:10:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:10:04,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:10:04,635 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 02:10:04,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631506057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:10:04,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:10:04,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2022-01-19 02:10:04,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278653669] [2022-01-19 02:10:04,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:10:04,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 02:10:04,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:10:04,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 02:10:04,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-19 02:10:04,637 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:10:04,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 2128 transitions, 55517 flow. Second operand has 20 states, 20 states have (on average 64.4) internal successors, (1288), 20 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:10:04,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:10:04,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:10:04,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:10:10,458 INFO L129 PetriNetUnfolder]: 2673/8808 cut-off events. [2022-01-19 02:10:10,458 INFO L130 PetriNetUnfolder]: For 160773/160807 co-relation queries the response was YES. [2022-01-19 02:10:10,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73863 conditions, 8808 events. 2673/8808 cut-off events. For 160773/160807 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 96294 event pairs, 49 based on Foata normal form. 47/8823 useless extension candidates. Maximal degree in co-relation 73549. Up to 1515 conditions per place. [2022-01-19 02:10:10,594 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 465 selfloop transitions, 2275 changer transitions 4/2803 dead transitions. [2022-01-19 02:10:10,594 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 2803 transitions, 78161 flow [2022-01-19 02:10:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-19 02:10:10,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-01-19 02:10:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3050 transitions. [2022-01-19 02:10:10,597 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7893374741200828 [2022-01-19 02:10:10,597 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3050 transitions. [2022-01-19 02:10:10,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3050 transitions. [2022-01-19 02:10:10,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:10:10,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3050 transitions. [2022-01-19 02:10:10,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 66.30434782608695) internal successors, (3050), 46 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:10:10,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:10:10,603 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:10:10,603 INFO L186 Difference]: Start difference. First operand has 534 places, 2128 transitions, 55517 flow. Second operand 46 states and 3050 transitions. [2022-01-19 02:10:10,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 2803 transitions, 78161 flow [2022-01-19 02:10:13,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 2803 transitions, 77665 flow, removed 93 selfloop flow, removed 27 redundant places. [2022-01-19 02:10:13,693 INFO L242 Difference]: Finished difference. Result has 563 places, 2696 transitions, 78965 flow [2022-01-19 02:10:13,695 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=55027, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1733, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=78965, PETRI_PLACES=563, PETRI_TRANSITIONS=2696} [2022-01-19 02:10:13,696 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 489 predicate places. [2022-01-19 02:10:13,696 INFO L470 AbstractCegarLoop]: Abstraction has has 563 places, 2696 transitions, 78965 flow [2022-01-19 02:10:13,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.4) internal successors, (1288), 20 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:10:13,696 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:10:13,696 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:10:13,714 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 02:10:13,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 02:10:13,912 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:10:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:10:13,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1865017427, now seen corresponding path program 11 times [2022-01-19 02:10:13,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:10:13,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981067379] [2022-01-19 02:10:13,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:10:13,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:10:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:10:14,000 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 02:10:14,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:10:14,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981067379] [2022-01-19 02:10:14,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981067379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:10:14,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422806049] [2022-01-19 02:10:14,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:10:14,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:10:14,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:10:14,002 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 02:10:14,002 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 02:10:14,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 02:10:14,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:10:14,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:10:14,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:10:14,254 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 02:10:14,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:10:14,627 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 02:10:14,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422806049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:10:14,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:10:14,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2022-01-19 02:10:14,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105350714] [2022-01-19 02:10:14,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:10:14,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 02:10:14,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:10:14,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 02:10:14,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-19 02:10:14,630 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:10:14,631 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 2696 transitions, 78965 flow. Second operand has 20 states, 20 states have (on average 64.05) internal successors, (1281), 20 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:10:14,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:10:14,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:10:14,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:10:22,655 INFO L129 PetriNetUnfolder]: 2922/9768 cut-off events. [2022-01-19 02:10:22,655 INFO L130 PetriNetUnfolder]: For 227983/227996 co-relation queries the response was YES. [2022-01-19 02:10:22,763 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90562 conditions, 9768 events. 2922/9768 cut-off events. For 227983/227996 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 109936 event pairs, 204 based on Foata normal form. 65/9720 useless extension candidates. Maximal degree in co-relation 89656. Up to 1634 conditions per place. [2022-01-19 02:10:22,816 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 555 selfloop transitions, 2527 changer transitions 14/3155 dead transitions. [2022-01-19 02:10:22,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 3155 transitions, 98752 flow [2022-01-19 02:10:22,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 02:10:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 02:10:22,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3724 transitions. [2022-01-19 02:10:22,819 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2022-01-19 02:10:22,819 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3724 transitions. [2022-01-19 02:10:22,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3724 transitions. [2022-01-19 02:10:22,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:10:22,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3724 transitions. [2022-01-19 02:10:22,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 65.33333333333333) internal successors, (3724), 57 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:10:22,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:10:22,827 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:10:22,827 INFO L186 Difference]: Start difference. First operand has 563 places, 2696 transitions, 78965 flow. Second operand 57 states and 3724 transitions. [2022-01-19 02:10:22,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 3155 transitions, 98752 flow [2022-01-19 02:10:27,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 3155 transitions, 98007 flow, removed 204 selfloop flow, removed 19 redundant places. [2022-01-19 02:10:27,786 INFO L242 Difference]: Finished difference. Result has 612 places, 3077 transitions, 98324 flow [2022-01-19 02:10:27,788 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=77521, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=98324, PETRI_PLACES=612, PETRI_TRANSITIONS=3077} [2022-01-19 02:10:27,789 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 538 predicate places. [2022-01-19 02:10:27,789 INFO L470 AbstractCegarLoop]: Abstraction has has 612 places, 3077 transitions, 98324 flow [2022-01-19 02:10:27,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.05) internal successors, (1281), 20 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:10:27,789 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:10:27,789 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:10:27,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-19 02:10:27,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 02:10:27,990 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:10:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:10:27,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1298955597, now seen corresponding path program 12 times [2022-01-19 02:10:27,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:10:27,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949149648] [2022-01-19 02:10:27,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:10:27,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:10:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:10:28,087 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 02:10:28,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:10:28,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949149648] [2022-01-19 02:10:28,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949149648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:10:28,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214476337] [2022-01-19 02:10:28,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:10:28,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:10:28,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:10:28,100 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 02:10:28,101 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 02:10:28,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 02:10:28,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:10:28,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:10:28,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:10:28,326 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 02:10:28,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:11:44,127 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 02:11:44,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214476337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:11:44,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:11:44,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-19 02:11:44,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876789390] [2022-01-19 02:11:44,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:11:44,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 02:11:44,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:11:44,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 02:11:44,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-19 02:11:44,129 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:11:44,130 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 3077 transitions, 98324 flow. Second operand has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:11:44,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:11:44,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:11:44,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:11:55,307 INFO L129 PetriNetUnfolder]: 2963/9964 cut-off events. [2022-01-19 02:11:55,307 INFO L130 PetriNetUnfolder]: For 269501/269524 co-relation queries the response was YES. [2022-01-19 02:11:55,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98782 conditions, 9964 events. 2963/9964 cut-off events. For 269501/269524 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 112512 event pairs, 51 based on Foata normal form. 21/9951 useless extension candidates. Maximal degree in co-relation 98062. Up to 1667 conditions per place. [2022-01-19 02:11:55,488 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 315 selfloop transitions, 2831 changer transitions 5/3210 dead transitions. [2022-01-19 02:11:55,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 3210 transitions, 108474 flow [2022-01-19 02:11:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 02:11:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 02:11:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3720 transitions. [2022-01-19 02:11:55,491 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7769423558897243 [2022-01-19 02:11:55,491 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3720 transitions. [2022-01-19 02:11:55,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3720 transitions. [2022-01-19 02:11:55,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:11:55,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3720 transitions. [2022-01-19 02:11:55,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 65.26315789473684) internal successors, (3720), 57 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:11:55,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:11:55,498 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:11:55,498 INFO L186 Difference]: Start difference. First operand has 612 places, 3077 transitions, 98324 flow. Second operand 57 states and 3720 transitions. [2022-01-19 02:11:55,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 3210 transitions, 108474 flow [2022-01-19 02:12:00,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 3210 transitions, 106468 flow, removed 229 selfloop flow, removed 19 redundant places. [2022-01-19 02:12:00,501 INFO L242 Difference]: Finished difference. Result has 656 places, 3181 transitions, 107916 flow [2022-01-19 02:12:00,503 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=96063, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3065, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2719, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=107916, PETRI_PLACES=656, PETRI_TRANSITIONS=3181} [2022-01-19 02:12:00,503 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 582 predicate places. [2022-01-19 02:12:00,503 INFO L470 AbstractCegarLoop]: Abstraction has has 656 places, 3181 transitions, 107916 flow [2022-01-19 02:12:00,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:12:00,504 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:12:00,504 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:12:00,519 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 02:12:00,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 02:12:00,704 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:12:00,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:12:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash -808919107, now seen corresponding path program 13 times [2022-01-19 02:12:00,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:12:00,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448831593] [2022-01-19 02:12:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:12:00,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:12:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:12:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:12:00,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:12:00,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448831593] [2022-01-19 02:12:00,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448831593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:12:00,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362668583] [2022-01-19 02:12:00,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:12:00,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:12:00,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:12:00,812 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 02:12:00,815 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 02:12:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:12:00,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:12:00,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:12:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:12:01,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:12:01,592 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 02:12:01,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362668583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:12:01,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:12:01,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-01-19 02:12:01,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118561556] [2022-01-19 02:12:01,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:12:01,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 02:12:01,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:12:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 02:12:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-01-19 02:12:01,594 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:12:01,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 3181 transitions, 107916 flow. Second operand has 17 states, 17 states have (on average 64.41176470588235) internal successors, (1095), 17 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:12:01,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:12:01,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:12:01,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:12:13,219 INFO L129 PetriNetUnfolder]: 3516/11658 cut-off events. [2022-01-19 02:12:13,219 INFO L130 PetriNetUnfolder]: For 335548/335572 co-relation queries the response was YES. [2022-01-19 02:12:13,402 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124079 conditions, 11658 events. 3516/11658 cut-off events. For 335548/335572 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 135553 event pairs, 62 based on Foata normal form. 113/11727 useless extension candidates. Maximal degree in co-relation 123132. Up to 1948 conditions per place. [2022-01-19 02:12:13,500 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 1013 selfloop transitions, 2861 changer transitions 5/3938 dead transitions. [2022-01-19 02:12:13,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 3938 transitions, 142554 flow [2022-01-19 02:12:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-19 02:12:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-01-19 02:12:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2805 transitions. [2022-01-19 02:12:13,504 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7950680272108843 [2022-01-19 02:12:13,504 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2805 transitions. [2022-01-19 02:12:13,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2805 transitions. [2022-01-19 02:12:13,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:12:13,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2805 transitions. [2022-01-19 02:12:13,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 66.78571428571429) internal successors, (2805), 42 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:12:13,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:12:13,510 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:12:13,511 INFO L186 Difference]: Start difference. First operand has 656 places, 3181 transitions, 107916 flow. Second operand 42 states and 2805 transitions. [2022-01-19 02:12:13,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 3938 transitions, 142554 flow [2022-01-19 02:12:21,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 3938 transitions, 140551 flow, removed 248 selfloop flow, removed 21 redundant places. [2022-01-19 02:12:21,375 INFO L242 Difference]: Finished difference. Result has 694 places, 3688 transitions, 136903 flow [2022-01-19 02:12:21,378 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=106019, PETRI_DIFFERENCE_MINUEND_PLACES=632, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=136903, PETRI_PLACES=694, PETRI_TRANSITIONS=3688} [2022-01-19 02:12:21,378 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 620 predicate places. [2022-01-19 02:12:21,378 INFO L470 AbstractCegarLoop]: Abstraction has has 694 places, 3688 transitions, 136903 flow [2022-01-19 02:12:21,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.41176470588235) internal successors, (1095), 17 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:12:21,379 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:12:21,379 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] [2022-01-19 02:12:21,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 02:12:21,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:12:21,584 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:12:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:12:21,584 INFO L85 PathProgramCache]: Analyzing trace with hash 525738553, now seen corresponding path program 14 times [2022-01-19 02:12:21,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:12:21,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722424215] [2022-01-19 02:12:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:12:21,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:12:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:12:21,694 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 02:12:21,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:12:21,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722424215] [2022-01-19 02:12:21,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722424215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:12:21,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845844996] [2022-01-19 02:12:21,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:12:21,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:12:21,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:12:21,696 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 02:12:21,697 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 02:12:21,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:12:21,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:12:21,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:12:21,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:12:21,936 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 02:12:21,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:12:22,415 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 02:12:22,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845844996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:12:22,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:12:22,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 02:12:22,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173837124] [2022-01-19 02:12:22,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:12:22,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 02:12:22,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:12:22,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 02:12:22,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-19 02:12:22,417 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:12:22,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 694 places, 3688 transitions, 136903 flow. Second operand has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:12:22,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:12:22,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:12:22,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:12:38,189 INFO L129 PetriNetUnfolder]: 3558/11611 cut-off events. [2022-01-19 02:12:38,190 INFO L130 PetriNetUnfolder]: For 409108/409147 co-relation queries the response was YES. [2022-01-19 02:12:38,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133396 conditions, 11611 events. 3558/11611 cut-off events. For 409108/409147 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 134201 event pairs, 416 based on Foata normal form. 37/11481 useless extension candidates. Maximal degree in co-relation 132702. Up to 2926 conditions per place. [2022-01-19 02:12:38,404 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1368 selfloop transitions, 2377 changer transitions 5/3809 dead transitions. [2022-01-19 02:12:38,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 3809 transitions, 148469 flow [2022-01-19 02:12:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-19 02:12:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-01-19 02:12:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1665 transitions. [2022-01-19 02:12:38,405 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7928571428571428 [2022-01-19 02:12:38,405 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1665 transitions. [2022-01-19 02:12:38,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1665 transitions. [2022-01-19 02:12:38,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:12:38,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1665 transitions. [2022-01-19 02:12:38,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 66.6) internal successors, (1665), 25 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:12:38,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:12:38,408 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:12:38,408 INFO L186 Difference]: Start difference. First operand has 694 places, 3688 transitions, 136903 flow. Second operand 25 states and 1665 transitions. [2022-01-19 02:12:38,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 3809 transitions, 148469 flow [2022-01-19 02:12:47,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 3809 transitions, 146418 flow, removed 216 selfloop flow, removed 23 redundant places. [2022-01-19 02:12:47,742 INFO L242 Difference]: Finished difference. Result has 701 places, 3747 transitions, 146411 flow [2022-01-19 02:12:47,744 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=133464, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=146411, PETRI_PLACES=701, PETRI_TRANSITIONS=3747} [2022-01-19 02:12:47,744 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 627 predicate places. [2022-01-19 02:12:47,744 INFO L470 AbstractCegarLoop]: Abstraction has has 701 places, 3747 transitions, 146411 flow [2022-01-19 02:12:47,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:12:47,745 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:12:47,745 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:12:47,762 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 02:12:47,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-19 02:12:47,945 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:12:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:12:47,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1708312077, now seen corresponding path program 15 times [2022-01-19 02:12:47,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:12:47,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963266362] [2022-01-19 02:12:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:12:47,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:12:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:12:48,042 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 02:12:48,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:12:48,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963266362] [2022-01-19 02:12:48,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963266362] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:12:48,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753148476] [2022-01-19 02:12:48,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:12:48,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:12:48,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:12:48,043 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 02:12:48,044 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 02:12:48,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 02:12:48,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:12:48,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:12:48,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:12:48,286 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 02:12:48,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:12:48,801 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 02:12:48,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753148476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:12:48,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:12:48,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 02:12:48,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791035841] [2022-01-19 02:12:48,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:12:48,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 02:12:48,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:12:48,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 02:12:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-19 02:12:48,802 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:12:48,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 701 places, 3747 transitions, 146411 flow. Second operand has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:12:48,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:12:48,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:12:48,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:13:04,987 INFO L129 PetriNetUnfolder]: 3874/12502 cut-off events. [2022-01-19 02:13:04,987 INFO L130 PetriNetUnfolder]: For 524695/524729 co-relation queries the response was YES. [2022-01-19 02:13:05,149 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151060 conditions, 12502 events. 3874/12502 cut-off events. For 524695/524729 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 145143 event pairs, 72 based on Foata normal form. 35/12474 useless extension candidates. Maximal degree in co-relation 150323. Up to 2165 conditions per place. [2022-01-19 02:13:05,228 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 783 selfloop transitions, 3355 changer transitions 16/4213 dead transitions. [2022-01-19 02:13:05,229 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 736 places, 4213 transitions, 173478 flow [2022-01-19 02:13:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 02:13:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 02:13:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2556 transitions. [2022-01-19 02:13:05,231 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7802197802197802 [2022-01-19 02:13:05,231 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2556 transitions. [2022-01-19 02:13:05,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2556 transitions. [2022-01-19 02:13:05,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:13:05,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2556 transitions. [2022-01-19 02:13:05,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 65.53846153846153) internal successors, (2556), 39 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:13:05,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:13:05,235 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:13:05,235 INFO L186 Difference]: Start difference. First operand has 701 places, 3747 transitions, 146411 flow. Second operand 39 states and 2556 transitions. [2022-01-19 02:13:05,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 736 places, 4213 transitions, 173478 flow [2022-01-19 02:13:15,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 726 places, 4213 transitions, 173263 flow, removed 18 selfloop flow, removed 10 redundant places. [2022-01-19 02:13:15,616 INFO L242 Difference]: Finished difference. Result has 739 places, 4180 transitions, 176716 flow [2022-01-19 02:13:15,619 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=146152, PETRI_DIFFERENCE_MINUEND_PLACES=688, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2922, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=176716, PETRI_PLACES=739, PETRI_TRANSITIONS=4180} [2022-01-19 02:13:15,619 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 665 predicate places. [2022-01-19 02:13:15,619 INFO L470 AbstractCegarLoop]: Abstraction has has 739 places, 4180 transitions, 176716 flow [2022-01-19 02:13:15,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:13:15,619 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:13:15,619 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:13:15,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-19 02:13:15,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-19 02:13:15,835 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:13:15,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:13:15,835 INFO L85 PathProgramCache]: Analyzing trace with hash -895646471, now seen corresponding path program 16 times [2022-01-19 02:13:15,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:13:15,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747133657] [2022-01-19 02:13:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:13:15,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:13:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:13:15,912 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 02:13:15,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:13:15,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747133657] [2022-01-19 02:13:15,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747133657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:13:15,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860832268] [2022-01-19 02:13:15,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:13:15,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:13:15,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:13:15,913 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 02:13:15,914 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 02:13:15,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:13:15,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:13:15,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:13:15,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:13:16,163 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 02:13:16,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:13:16,613 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 02:13:16,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860832268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:13:16,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:13:16,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 02:13:16,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889868459] [2022-01-19 02:13:16,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:13:16,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 02:13:16,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:13:16,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 02:13:16,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-19 02:13:16,614 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:13:16,615 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 4180 transitions, 176716 flow. Second operand has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:13:16,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:13:16,615 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:13:16,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:13:32,987 INFO L129 PetriNetUnfolder]: 3870/12213 cut-off events. [2022-01-19 02:13:32,987 INFO L130 PetriNetUnfolder]: For 583321/583336 co-relation queries the response was YES. [2022-01-19 02:13:33,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160432 conditions, 12213 events. 3870/12213 cut-off events. For 583321/583336 co-relation queries the response was YES. Maximal size of possible extension queue 868. Compared 140105 event pairs, 258 based on Foata normal form. 18/12174 useless extension candidates. Maximal degree in co-relation 159991. Up to 2170 conditions per place. [2022-01-19 02:13:33,258 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1314 selfloop transitions, 2810 changer transitions 9/4192 dead transitions. [2022-01-19 02:13:33,258 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 4192 transitions, 185096 flow [2022-01-19 02:13:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-19 02:13:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-01-19 02:13:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1909 transitions. [2022-01-19 02:13:33,260 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7836617405582923 [2022-01-19 02:13:33,260 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1909 transitions. [2022-01-19 02:13:33,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1909 transitions. [2022-01-19 02:13:33,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:13:33,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1909 transitions. [2022-01-19 02:13:33,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.82758620689656) internal successors, (1909), 29 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:13:33,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:13:33,264 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:13:33,264 INFO L186 Difference]: Start difference. First operand has 739 places, 4180 transitions, 176716 flow. Second operand 29 states and 1909 transitions. [2022-01-19 02:13:33,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 4192 transitions, 185096 flow [2022-01-19 02:13:45,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 742 places, 4192 transitions, 182826 flow, removed 207 selfloop flow, removed 22 redundant places. [2022-01-19 02:13:45,413 INFO L242 Difference]: Finished difference. Result has 746 places, 4168 transitions, 182809 flow [2022-01-19 02:13:45,415 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=173918, PETRI_DIFFERENCE_MINUEND_PLACES=714, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2801, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=182809, PETRI_PLACES=746, PETRI_TRANSITIONS=4168} [2022-01-19 02:13:45,416 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 672 predicate places. [2022-01-19 02:13:45,416 INFO L470 AbstractCegarLoop]: Abstraction has has 746 places, 4168 transitions, 182809 flow [2022-01-19 02:13:45,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:13:45,416 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:13:45,416 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:13:45,432 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 02:13:45,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:13:45,617 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:13:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:13:45,617 INFO L85 PathProgramCache]: Analyzing trace with hash -918570207, now seen corresponding path program 17 times [2022-01-19 02:13:45,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:13:45,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349145716] [2022-01-19 02:13:45,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:13:45,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:13:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:13:45,708 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 02:13:45,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:13:45,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349145716] [2022-01-19 02:13:45,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349145716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:13:45,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994116279] [2022-01-19 02:13:45,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:13:45,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:13:45,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:13:45,709 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 02:13:45,710 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 02:13:45,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 02:13:45,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:13:45,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:13:45,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:13:45,930 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 02:13:45,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:13:46,209 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 02:13:46,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994116279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:13:46,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:13:46,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2022-01-19 02:13:46,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410745147] [2022-01-19 02:13:46,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:13:46,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 02:13:46,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:13:46,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 02:13:46,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-19 02:13:46,210 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:13:46,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 4168 transitions, 182809 flow. Second operand has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:13:46,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:13:46,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:13:46,211 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:14:07,829 INFO L129 PetriNetUnfolder]: 4098/13256 cut-off events. [2022-01-19 02:14:07,829 INFO L130 PetriNetUnfolder]: For 660788/660808 co-relation queries the response was YES. [2022-01-19 02:14:08,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176089 conditions, 13256 events. 4098/13256 cut-off events. For 660788/660808 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 156344 event pairs, 114 based on Foata normal form. 25/13256 useless extension candidates. Maximal degree in co-relation 175801. Up to 2289 conditions per place. [2022-01-19 02:14:08,159 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 902 selfloop transitions, 3573 changer transitions 6/4540 dead transitions. [2022-01-19 02:14:08,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 4540 transitions, 206005 flow [2022-01-19 02:14:08,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-19 02:14:08,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-01-19 02:14:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3604 transitions. [2022-01-19 02:14:08,164 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.78008658008658 [2022-01-19 02:14:08,164 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3604 transitions. [2022-01-19 02:14:08,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3604 transitions. [2022-01-19 02:14:08,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:14:08,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3604 transitions. [2022-01-19 02:14:08,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 65.52727272727273) internal successors, (3604), 55 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:14:08,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 84.0) internal successors, (4704), 56 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:14:08,170 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 84.0) internal successors, (4704), 56 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:14:08,170 INFO L186 Difference]: Start difference. First operand has 746 places, 4168 transitions, 182809 flow. Second operand 55 states and 3604 transitions. [2022-01-19 02:14:08,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 4540 transitions, 206005 flow [2022-01-19 02:14:22,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 779 places, 4540 transitions, 204757 flow, removed 19 selfloop flow, removed 14 redundant places. [2022-01-19 02:14:22,361 INFO L242 Difference]: Finished difference. Result has 792 places, 4501 transitions, 206045 flow [2022-01-19 02:14:22,365 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=181644, PETRI_DIFFERENCE_MINUEND_PLACES=725, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=206045, PETRI_PLACES=792, PETRI_TRANSITIONS=4501} [2022-01-19 02:14:22,365 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 718 predicate places. [2022-01-19 02:14:22,365 INFO L470 AbstractCegarLoop]: Abstraction has has 792 places, 4501 transitions, 206045 flow [2022-01-19 02:14:22,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:14:22,365 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:14:22,365 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:14:22,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-19 02:14:22,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:14:22,579 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:14:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:14:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash -195799843, now seen corresponding path program 18 times [2022-01-19 02:14:22,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:14:22,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178330902] [2022-01-19 02:14:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:14:22,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:14:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:14:22,698 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 02:14:22,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:14:22,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178330902] [2022-01-19 02:14:22,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178330902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:14:22,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827638163] [2022-01-19 02:14:22,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:14:22,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:14:22,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:14:22,699 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 02:14:22,703 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 02:14:22,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 02:14:22,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:14:22,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:14:22,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:14:22,934 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 02:14:22,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:14:23,387 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 02:14:23,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827638163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:14:23,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:14:23,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-01-19 02:14:23,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371663011] [2022-01-19 02:14:23,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:14:23,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 02:14:23,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:14:23,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 02:14:23,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-19 02:14:23,389 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:14:23,389 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 4501 transitions, 206045 flow. Second operand has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:14:23,389 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:14:23,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:14:23,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:14:46,647 INFO L129 PetriNetUnfolder]: 4089/13177 cut-off events. [2022-01-19 02:14:46,648 INFO L130 PetriNetUnfolder]: For 720417/720448 co-relation queries the response was YES. [2022-01-19 02:14:46,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182902 conditions, 13177 events. 4089/13177 cut-off events. For 720417/720448 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 155136 event pairs, 270 based on Foata normal form. 27/13158 useless extension candidates. Maximal degree in co-relation 182317. Up to 2290 conditions per place. [2022-01-19 02:14:46,981 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 693 selfloop transitions, 3760 changer transitions 5/4517 dead transitions. [2022-01-19 02:14:46,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 826 places, 4517 transitions, 215086 flow [2022-01-19 02:14:46,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-19 02:14:46,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-01-19 02:14:46,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2634 transitions. [2022-01-19 02:14:46,987 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7839285714285714 [2022-01-19 02:14:46,987 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2634 transitions. [2022-01-19 02:14:46,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2634 transitions. [2022-01-19 02:14:46,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:14:46,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2634 transitions. [2022-01-19 02:14:46,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.85) internal successors, (2634), 40 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:14:46,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:14:46,991 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:14:46,991 INFO L186 Difference]: Start difference. First operand has 792 places, 4501 transitions, 206045 flow. Second operand 40 states and 2634 transitions. [2022-01-19 02:14:46,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 826 places, 4517 transitions, 215086 flow [2022-01-19 02:15:01,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 805 places, 4517 transitions, 212636 flow, removed 464 selfloop flow, removed 21 redundant places. [2022-01-19 02:15:01,767 INFO L242 Difference]: Finished difference. Result has 807 places, 4493 transitions, 211990 flow [2022-01-19 02:15:01,770 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=203081, PETRI_DIFFERENCE_MINUEND_PLACES=766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3752, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=211990, PETRI_PLACES=807, PETRI_TRANSITIONS=4493} [2022-01-19 02:15:01,771 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 733 predicate places. [2022-01-19 02:15:01,771 INFO L470 AbstractCegarLoop]: Abstraction has has 807 places, 4493 transitions, 211990 flow [2022-01-19 02:15:01,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:15:01,771 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:15:01,771 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:15:01,787 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 02:15:01,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:15:01,972 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:15:01,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:15:01,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1867471673, now seen corresponding path program 19 times [2022-01-19 02:15:01,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:15:01,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168903640] [2022-01-19 02:15:01,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:15:01,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:15:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:15:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:15:02,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:15:02,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168903640] [2022-01-19 02:15:02,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168903640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:15:02,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685336530] [2022-01-19 02:15:02,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:15:02,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:15:02,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:15:02,148 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:15:02,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-19 02:15:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:15:02,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:15:02,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:15:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:15:02,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:15:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:15:39,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685336530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:15:39,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:15:39,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 02:15:39,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130550037] [2022-01-19 02:15:39,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:15:39,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 02:15:39,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:15:39,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 02:15:39,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-19 02:15:39,482 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:15:39,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 807 places, 4493 transitions, 211990 flow. Second operand has 21 states, 21 states have (on average 64.33333333333333) internal successors, (1351), 21 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:15:39,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:15:39,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:15:39,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:16:03,719 INFO L129 PetriNetUnfolder]: 4422/14111 cut-off events. [2022-01-19 02:16:03,719 INFO L130 PetriNetUnfolder]: For 835285/835302 co-relation queries the response was YES. [2022-01-19 02:16:03,950 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203886 conditions, 14111 events. 4422/14111 cut-off events. For 835285/835302 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 166899 event pairs, 122 based on Foata normal form. 43/14111 useless extension candidates. Maximal degree in co-relation 203220. Up to 3982 conditions per place. [2022-01-19 02:16:04,057 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 1965 selfloop transitions, 2981 changer transitions 1/5006 dead transitions. [2022-01-19 02:16:04,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 836 places, 5006 transitions, 246312 flow [2022-01-19 02:16:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 02:16:04,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 02:16:04,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2187 transitions. [2022-01-19 02:16:04,059 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.788961038961039 [2022-01-19 02:16:04,059 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2187 transitions. [2022-01-19 02:16:04,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2187 transitions. [2022-01-19 02:16:04,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:16:04,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2187 transitions. [2022-01-19 02:16:04,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 66.27272727272727) internal successors, (2187), 33 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:16:04,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:16:04,062 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:16:04,062 INFO L186 Difference]: Start difference. First operand has 807 places, 4493 transitions, 211990 flow. Second operand 33 states and 2187 transitions. [2022-01-19 02:16:04,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 836 places, 5006 transitions, 246312 flow [2022-01-19 02:16:21,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 814 places, 5006 transitions, 244124 flow, removed 243 selfloop flow, removed 22 redundant places. [2022-01-19 02:16:21,278 INFO L242 Difference]: Finished difference. Result has 834 places, 4838 transitions, 238973 flow [2022-01-19 02:16:21,281 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=209975, PETRI_DIFFERENCE_MINUEND_PLACES=782, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2682, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=238973, PETRI_PLACES=834, PETRI_TRANSITIONS=4838} [2022-01-19 02:16:21,282 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 760 predicate places. [2022-01-19 02:16:21,282 INFO L470 AbstractCegarLoop]: Abstraction has has 834 places, 4838 transitions, 238973 flow [2022-01-19 02:16:21,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.33333333333333) internal successors, (1351), 21 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:16:21,282 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:16:21,282 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:16:21,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-19 02:16:21,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-19 02:16:21,483 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:16:21,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:16:21,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1763869315, now seen corresponding path program 20 times [2022-01-19 02:16:21,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:16:21,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685292953] [2022-01-19 02:16:21,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:16:21,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:16:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:16:21,573 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 02:16:21,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:16:21,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685292953] [2022-01-19 02:16:21,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685292953] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:16:21,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384186586] [2022-01-19 02:16:21,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:16:21,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:16:21,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:16:21,574 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:16:21,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-19 02:16:21,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:16:21,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:16:21,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:16:21,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:16:21,777 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 02:16:21,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:17:31,987 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 02:17:31,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384186586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:17:31,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:17:31,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 02:17:31,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348191044] [2022-01-19 02:17:31,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:17:31,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 02:17:31,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:17:31,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 02:17:31,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-01-19 02:17:31,989 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:17:31,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 834 places, 4838 transitions, 238973 flow. Second operand has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:17:31,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:17:31,990 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:17:31,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:17:56,564 INFO L129 PetriNetUnfolder]: 4545/14305 cut-off events. [2022-01-19 02:17:56,564 INFO L130 PetriNetUnfolder]: For 956835/956844 co-relation queries the response was YES. [2022-01-19 02:17:56,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217723 conditions, 14305 events. 4545/14305 cut-off events. For 956835/956844 co-relation queries the response was YES. Maximal size of possible extension queue 1036. Compared 168770 event pairs, 405 based on Foata normal form. 15/14161 useless extension candidates. Maximal degree in co-relation 217371. Up to 3524 conditions per place. [2022-01-19 02:17:56,971 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 2409 selfloop transitions, 2605 changer transitions 3/5076 dead transitions. [2022-01-19 02:17:56,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 859 places, 5076 transitions, 261085 flow [2022-01-19 02:17:56,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-19 02:17:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-01-19 02:17:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1724 transitions. [2022-01-19 02:17:56,973 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7893772893772893 [2022-01-19 02:17:56,973 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1724 transitions. [2022-01-19 02:17:56,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1724 transitions. [2022-01-19 02:17:56,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:17:56,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1724 transitions. [2022-01-19 02:17:56,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 66.3076923076923) internal successors, (1724), 26 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:17:56,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 84.0) internal successors, (2268), 27 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:17:56,975 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 84.0) internal successors, (2268), 27 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:17:56,976 INFO L186 Difference]: Start difference. First operand has 834 places, 4838 transitions, 238973 flow. Second operand 26 states and 1724 transitions. [2022-01-19 02:17:56,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 859 places, 5076 transitions, 261085 flow [2022-01-19 02:18:16,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 849 places, 5076 transitions, 258908 flow, removed 687 selfloop flow, removed 10 redundant places. [2022-01-19 02:18:17,190 INFO L242 Difference]: Finished difference. Result has 862 places, 5016 transitions, 256405 flow [2022-01-19 02:18:17,194 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=236917, PETRI_DIFFERENCE_MINUEND_PLACES=824, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=256405, PETRI_PLACES=862, PETRI_TRANSITIONS=5016} [2022-01-19 02:18:17,195 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 788 predicate places. [2022-01-19 02:18:17,195 INFO L470 AbstractCegarLoop]: Abstraction has has 862 places, 5016 transitions, 256405 flow [2022-01-19 02:18:17,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:18:17,195 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:18:17,195 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:18:17,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-19 02:18:17,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-19 02:18:17,411 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:18:17,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:18:17,412 INFO L85 PathProgramCache]: Analyzing trace with hash 874884631, now seen corresponding path program 21 times [2022-01-19 02:18:17,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:18:17,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749232358] [2022-01-19 02:18:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:18:17,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:18:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:18:17,522 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 02:18:17,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:18:17,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749232358] [2022-01-19 02:18:17,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749232358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:18:17,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319620643] [2022-01-19 02:18:17,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:18:17,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:18:17,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:18:17,523 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:18:17,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-19 02:18:17,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 02:18:17,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:18:17,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:18:17,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:18:17,754 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 02:18:17,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:19:22,594 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 02:19:22,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319620643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:19:22,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:19:22,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 02:19:22,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367651898] [2022-01-19 02:19:22,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:19:22,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 02:19:22,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:19:22,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 02:19:22,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-19 02:19:22,596 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:19:22,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 862 places, 5016 transitions, 256405 flow. Second operand has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:19:22,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:19:22,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:19:22,596 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:19:51,611 INFO L129 PetriNetUnfolder]: 4599/14509 cut-off events. [2022-01-19 02:19:51,611 INFO L130 PetriNetUnfolder]: For 1045706/1045710 co-relation queries the response was YES. [2022-01-19 02:19:51,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226415 conditions, 14509 events. 4599/14509 cut-off events. For 1045706/1045710 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 171502 event pairs, 246 based on Foata normal form. 12/14483 useless extension candidates. Maximal degree in co-relation 226186. Up to 2859 conditions per place. [2022-01-19 02:19:52,008 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1136 selfloop transitions, 4018 changer transitions 3/5216 dead transitions. [2022-01-19 02:19:52,008 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 910 places, 5216 transitions, 275776 flow [2022-01-19 02:19:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-19 02:19:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-01-19 02:19:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3275 transitions. [2022-01-19 02:19:52,010 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7797619047619048 [2022-01-19 02:19:52,011 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3275 transitions. [2022-01-19 02:19:52,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3275 transitions. [2022-01-19 02:19:52,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:19:52,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3275 transitions. [2022-01-19 02:19:52,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 65.5) internal successors, (3275), 50 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:19:52,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 84.0) internal successors, (4284), 51 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:19:52,016 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 84.0) internal successors, (4284), 51 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:19:52,016 INFO L186 Difference]: Start difference. First operand has 862 places, 5016 transitions, 256405 flow. Second operand 50 states and 3275 transitions. [2022-01-19 02:19:52,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 910 places, 5216 transitions, 275776 flow [2022-01-19 02:20:13,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 902 places, 5216 transitions, 275344 flow, removed 92 selfloop flow, removed 8 redundant places. [2022-01-19 02:20:13,248 INFO L242 Difference]: Finished difference. Result has 916 places, 5161 transitions, 277780 flow [2022-01-19 02:20:13,252 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=255854, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=277780, PETRI_PLACES=916, PETRI_TRANSITIONS=5161} [2022-01-19 02:20:13,253 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 842 predicate places. [2022-01-19 02:20:13,253 INFO L470 AbstractCegarLoop]: Abstraction has has 916 places, 5161 transitions, 277780 flow [2022-01-19 02:20:13,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:20:13,253 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:20:13,253 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:20:13,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-19 02:20:13,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:20:13,467 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:20:13,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:20:13,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1198734987, now seen corresponding path program 22 times [2022-01-19 02:20:13,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:20:13,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297061808] [2022-01-19 02:20:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:20:13,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:20:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:20:13,571 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 02:20:13,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:20:13,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297061808] [2022-01-19 02:20:13,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297061808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:20:13,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921377079] [2022-01-19 02:20:13,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:20:13,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:20:13,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:20:13,576 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:20:13,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-19 02:20:13,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:20:13,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:20:13,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:20:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:20:13,819 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 02:20:13,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:21:19,614 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 02:21:19,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921377079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:21:19,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:21:19,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 02:21:19,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490023849] [2022-01-19 02:21:19,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:21:19,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 02:21:19,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:21:19,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 02:21:19,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-19 02:21:19,616 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:21:19,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 916 places, 5161 transitions, 277780 flow. Second operand has 19 states, 19 states have (on average 63.8421052631579) internal successors, (1213), 19 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:21:19,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:21:19,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:21:19,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:21:53,239 INFO L129 PetriNetUnfolder]: 4634/14599 cut-off events. [2022-01-19 02:21:53,240 INFO L130 PetriNetUnfolder]: For 1167957/1167971 co-relation queries the response was YES. [2022-01-19 02:21:53,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238880 conditions, 14599 events. 4634/14599 cut-off events. For 1167957/1167971 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 172769 event pairs, 262 based on Foata normal form. 9/14557 useless extension candidates. Maximal degree in co-relation 238638. Up to 3496 conditions per place. [2022-01-19 02:21:53,667 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1868 selfloop transitions, 3315 changer transitions 3/5245 dead transitions. [2022-01-19 02:21:53,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 950 places, 5245 transitions, 291662 flow [2022-01-19 02:21:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-19 02:21:53,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-01-19 02:21:53,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2425 transitions. [2022-01-19 02:21:53,670 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7802445302445302 [2022-01-19 02:21:53,670 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2425 transitions. [2022-01-19 02:21:53,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2425 transitions. [2022-01-19 02:21:53,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:21:53,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2425 transitions. [2022-01-19 02:21:53,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 65.54054054054055) internal successors, (2425), 37 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:21:53,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:21:53,673 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:21:53,673 INFO L186 Difference]: Start difference. First operand has 916 places, 5161 transitions, 277780 flow. Second operand 37 states and 2425 transitions. [2022-01-19 02:21:53,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 950 places, 5245 transitions, 291662 flow [2022-01-19 02:22:16,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 936 places, 5245 transitions, 291094 flow, removed 147 selfloop flow, removed 14 redundant places. [2022-01-19 02:22:16,903 INFO L242 Difference]: Finished difference. Result has 948 places, 5214 transitions, 291480 flow [2022-01-19 02:22:16,906 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=277248, PETRI_DIFFERENCE_MINUEND_PLACES=900, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1857, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=291480, PETRI_PLACES=948, PETRI_TRANSITIONS=5214} [2022-01-19 02:22:16,907 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 874 predicate places. [2022-01-19 02:22:16,907 INFO L470 AbstractCegarLoop]: Abstraction has has 948 places, 5214 transitions, 291480 flow [2022-01-19 02:22:16,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.8421052631579) internal successors, (1213), 19 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:16,907 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:16,950 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:16,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-19 02:22:17,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:22:17,151 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:22:17,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash -478409363, now seen corresponding path program 23 times [2022-01-19 02:22:17,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:17,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827515701] [2022-01-19 02:22:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:17,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:17,244 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 02:22:17,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:17,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827515701] [2022-01-19 02:22:17,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827515701] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:22:17,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895596357] [2022-01-19 02:22:17,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:22:17,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:22:17,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:22:17,245 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:22:17,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-19 02:22:17,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:22:17,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:22:17,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:22:17,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:22:17,468 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 02:22:17,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:22:39,193 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 02:22:39,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895596357] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:22:39,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:22:39,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 02:22:39,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488700833] [2022-01-19 02:22:39,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:22:39,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 02:22:39,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:39,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 02:22:39,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-19 02:22:39,195 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 02:22:39,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 948 places, 5214 transitions, 291480 flow. Second operand has 19 states, 19 states have (on average 63.8421052631579) internal successors, (1213), 19 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:39,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:39,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 02:22:39,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:23:12,317 INFO L129 PetriNetUnfolder]: 4632/14596 cut-off events. [2022-01-19 02:23:12,317 INFO L130 PetriNetUnfolder]: For 1288676/1288689 co-relation queries the response was YES. [2022-01-19 02:23:12,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246990 conditions, 14596 events. 4632/14596 cut-off events. For 1288676/1288689 co-relation queries the response was YES. Maximal size of possible extension queue 1045. Compared 172711 event pairs, 267 based on Foata normal form. 4/14555 useless extension candidates. Maximal degree in co-relation 246737. Up to 3821 conditions per place. [2022-01-19 02:23:12,729 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 2220 selfloop transitions, 2947 changer transitions 4/5230 dead transitions. [2022-01-19 02:23:12,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 5230 transitions, 302136 flow [2022-01-19 02:23:12,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 02:23:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 02:23:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1189 transitions. [2022-01-19 02:23:12,731 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7863756613756614 [2022-01-19 02:23:12,731 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1189 transitions. [2022-01-19 02:23:12,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1189 transitions. [2022-01-19 02:23:12,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:23:12,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1189 transitions. [2022-01-19 02:23:12,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.05555555555556) internal successors, (1189), 18 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:12,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:12,733 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:12,733 INFO L186 Difference]: Start difference. First operand has 948 places, 5214 transitions, 291480 flow. Second operand 18 states and 1189 transitions. [2022-01-19 02:23:12,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 5230 transitions, 302136 flow Received shutdown request... [2022-01-19 02:23:39,080 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 02:23:39,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-19 02:23:39,101 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 02:23:39,101 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 02:23:39,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-19 02:23:39,281 WARN L594 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-01-19 02:23:39,282 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 02:23:39,282 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 02:23:39,284 INFO L732 BasicCegarLoop]: Path program histogram: [23, 2, 1] [2022-01-19 02:23:39,285 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 02:23:39,286 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 02:23:39,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 02:23:39 BasicIcfg [2022-01-19 02:23:39,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 02:23:39,287 INFO L158 Benchmark]: Toolchain (without parser) took 849321.37ms. Allocated memory was 343.9MB in the beginning and 4.9GB in the end (delta: 4.6GB). Free memory was 291.3MB in the beginning and 3.3GB in the end (delta: -3.0GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. [2022-01-19 02:23:39,288 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 343.9MB. Free memory is still 307.2MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 02:23:39,288 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.89ms. Allocated memory is still 343.9MB. Free memory was 291.0MB in the beginning and 317.2MB in the end (delta: -26.2MB). Peak memory consumption was 17.2MB. Max. memory is 16.0GB. [2022-01-19 02:23:39,288 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.41ms. Allocated memory is still 343.9MB. Free memory was 317.2MB in the beginning and 315.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 02:23:39,288 INFO L158 Benchmark]: Boogie Preprocessor took 27.92ms. Allocated memory is still 343.9MB. Free memory was 315.7MB in the beginning and 314.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 02:23:39,288 INFO L158 Benchmark]: RCFGBuilder took 283.93ms. Allocated memory is still 343.9MB. Free memory was 314.1MB in the beginning and 301.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-19 02:23:39,288 INFO L158 Benchmark]: TraceAbstraction took 848794.38ms. Allocated memory was 343.9MB in the beginning and 4.9GB in the end (delta: 4.6GB). Free memory was 301.0MB in the beginning and 3.3GB in the end (delta: -3.0GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. [2022-01-19 02:23:39,289 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 343.9MB. Free memory is still 307.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 190.89ms. Allocated memory is still 343.9MB. Free memory was 291.0MB in the beginning and 317.2MB in the end (delta: -26.2MB). Peak memory consumption was 17.2MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 19.41ms. Allocated memory is still 343.9MB. Free memory was 317.2MB in the beginning and 315.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 27.92ms. Allocated memory is still 343.9MB. Free memory was 315.7MB in the beginning and 314.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 283.93ms. Allocated memory is still 343.9MB. Free memory was 314.1MB in the beginning and 301.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 848794.38ms. Allocated memory was 343.9MB in the beginning and 4.9GB in the end (delta: 4.6GB). Free memory was 301.0MB in the beginning and 3.3GB in the end (delta: -3.0GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 96 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 848.7s, OverallIterations: 26, TraceHistogramMax: 2, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.0s, AutomataDifference: 491.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2833 SdHoareTripleChecker+Valid, 9.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2833 mSDsluCounter, 1937 SdHoareTripleChecker+Invalid, 7.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2729 mSDsCounter, 1306 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10720 IncrementalHoareTripleChecker+Invalid, 12026 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1306 mSolverCounterUnsat, 444 mSDtfsCounter, 10720 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4279 GetRequests, 3155 SyntacticMatches, 32 SemanticMatches, 1092 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18300 ImplicationChecksByTransitivity, 27.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=291480occurred in iteration=25, InterpolantAutomatonStates: 954, 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, 0.8s SatisfiabilityAnalysisTime, 350.1s InterpolantComputationTime, 3548 NumberOfCodeBlocks, 3383 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 5126 ConstructedInterpolants, 0 QuantifiedInterpolants, 24266 SizeOfPredicates, 256 NumberOfNonLiveVariables, 3407 ConjunctsInSsa, 283 ConjunctsInUnsatCore, 73 InterpolantComputations, 3 PerfectInterpolantSequences, 325/537 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