/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-After.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 14:07:25,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 14:07:25,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 14:07:25,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 14:07:25,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 14:07:25,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 14:07:25,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 14:07:25,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 14:07:25,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 14:07:25,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 14:07:25,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 14:07:25,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 14:07:25,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 14:07:25,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 14:07:25,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 14:07:25,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 14:07:25,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 14:07:25,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 14:07:25,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 14:07:25,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 14:07:26,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 14:07:26,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 14:07:26,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 14:07:26,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 14:07:26,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 14:07:26,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 14:07:26,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 14:07:26,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 14:07:26,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 14:07:26,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 14:07:26,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 14:07:26,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 14:07:26,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 14:07:26,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 14:07:26,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 14:07:26,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 14:07:26,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 14:07:26,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 14:07:26,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 14:07:26,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 14:07:26,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 14:07:26,019 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-After.epf [2022-01-19 14:07:26,036 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 14:07:26,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 14:07:26,037 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 14:07:26,037 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 14:07:26,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 14:07:26,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 14:07:26,037 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 14:07:26,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 14:07:26,038 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 14:07:26,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 14:07:26,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 14:07:26,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 14:07:26,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 14:07:26,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 14:07:26,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 14:07:26,038 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 14:07:26,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 14:07:26,038 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 14:07:26,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 14:07:26,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 14:07:26,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 14:07:26,039 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 14:07:26,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 14:07:26,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:07:26,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 14:07:26,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 14:07:26,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 14:07:26,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 14:07:26,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 14:07:26,040 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 14:07:26,040 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 14:07:26,040 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=AFTER [2022-01-19 14:07:26,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 14:07:26,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 14:07:26,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 14:07:26,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 14:07:26,226 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 14:07:26,226 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 14:07:26,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2022-01-19 14:07:26,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e07667f35/9a3b82e53d494cfab856362a59e1971b/FLAGa5a593694 [2022-01-19 14:07:26,588 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 14:07:26,589 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2022-01-19 14:07:26,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e07667f35/9a3b82e53d494cfab856362a59e1971b/FLAGa5a593694 [2022-01-19 14:07:27,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e07667f35/9a3b82e53d494cfab856362a59e1971b [2022-01-19 14:07:27,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 14:07:27,010 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 14:07:27,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 14:07:27,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 14:07:27,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 14:07:27,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:07:27" (1/1) ... [2022-01-19 14:07:27,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b1c1820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:07:27, skipping insertion in model container [2022-01-19 14:07:27,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:07:27" (1/1) ... [2022-01-19 14:07:27,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 14:07:27,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 14:07:27,184 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2121,2134] [2022-01-19 14:07:27,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:07:27,191 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 14:07:27,202 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2121,2134] [2022-01-19 14:07:27,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:07:27,211 INFO L208 MainTranslator]: Completed translation [2022-01-19 14:07:27,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:07:27 WrapperNode [2022-01-19 14:07:27,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 14:07:27,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 14:07:27,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 14:07:27,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 14:07:27,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:07:27" (1/1) ... [2022-01-19 14:07:27,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:07:27" (1/1) ... [2022-01-19 14:07:27,232 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-01-19 14:07:27,232 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 14:07:27,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 14:07:27,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 14:07:27,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 14:07:27,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:07:27" (1/1) ... [2022-01-19 14:07:27,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:07:27" (1/1) ... [2022-01-19 14:07:27,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:07:27" (1/1) ... [2022-01-19 14:07:27,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:07:27" (1/1) ... [2022-01-19 14:07:27,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:07:27" (1/1) ... [2022-01-19 14:07:27,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:07:27" (1/1) ... [2022-01-19 14:07:27,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:07:27" (1/1) ... [2022-01-19 14:07:27,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 14:07:27,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 14:07:27,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 14:07:27,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 14:07:27,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:07:27" (1/1) ... [2022-01-19 14:07:27,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:07:27,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:27,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 14:07:27,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-19 14:07:27,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 14:07:27,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 14:07:27,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 14:07:27,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 14:07:27,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 14:07:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 14:07:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 14:07:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 14:07:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 14:07:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 14:07:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 14:07:27,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 14:07:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 14:07:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 14:07:27,301 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 14:07:27,366 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 14:07:27,367 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 14:07:27,483 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 14:07:27,502 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 14:07:27,502 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 14:07:27,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:07:27 BoogieIcfgContainer [2022-01-19 14:07:27,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 14:07:27,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 14:07:27,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 14:07:27,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 14:07:27,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:07:27" (1/3) ... [2022-01-19 14:07:27,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d041b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:07:27, skipping insertion in model container [2022-01-19 14:07:27,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:07:27" (2/3) ... [2022-01-19 14:07:27,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d041b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:07:27, skipping insertion in model container [2022-01-19 14:07:27,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:07:27" (3/3) ... [2022-01-19 14:07:27,510 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-01-19 14:07:27,522 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 14:07:27,522 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 14:07:27,522 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 14:07:27,567 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,568 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,568 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,570 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,571 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,572 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,574 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,574 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,574 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,574 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,575 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,575 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,575 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,575 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,575 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,575 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,575 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,576 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,576 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,576 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,576 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,576 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,577 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,577 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,577 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,577 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,578 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,578 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,578 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,578 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,578 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,578 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,579 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,579 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,579 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,579 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,580 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,580 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,580 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,580 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,580 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,580 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,580 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,581 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,583 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,589 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,589 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,589 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,591 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,592 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,594 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:07:27,604 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 14:07:27,649 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 14:07:27,658 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 14:07:27,658 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 14:07:27,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-01-19 14:07:27,721 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2022-01-19 14:07:27,722 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 14:07:27,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-01-19 14:07:27,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-01-19 14:07:27,729 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-01-19 14:07:27,750 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2022-01-19 14:07:27,750 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 14:07:27,750 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:27,751 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:07:27,751 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:27,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:27,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1603327647, now seen corresponding path program 1 times [2022-01-19 14:07:27,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:27,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869953826] [2022-01-19 14:07:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:27,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:27,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:27,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869953826] [2022-01-19 14:07:27,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869953826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:07:27,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:07:27,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 14:07:27,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608817775] [2022-01-19 14:07:27,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:07:27,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 14:07:27,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:27,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 14:07:27,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 14:07:27,959 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 87 [2022-01-19 14:07:27,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:27,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:27,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 87 [2022-01-19 14:07:27,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:28,004 INFO L129 PetriNetUnfolder]: 5/83 cut-off events. [2022-01-19 14:07:28,004 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-01-19 14:07:28,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 83 events. 5/83 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 1 based on Foata normal form. 8/85 useless extension candidates. Maximal degree in co-relation 49. Up to 10 conditions per place. [2022-01-19 14:07:28,006 INFO L132 encePairwiseOnDemand]: 83/87 looper letters, 5 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2022-01-19 14:07:28,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 166 flow [2022-01-19 14:07:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 14:07:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 14:07:28,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2022-01-19 14:07:28,017 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9367816091954023 [2022-01-19 14:07:28,017 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2022-01-19 14:07:28,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2022-01-19 14:07:28,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:28,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2022-01-19 14:07:28,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:28,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:28,026 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:28,027 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 163 transitions. [2022-01-19 14:07:28,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 166 flow [2022-01-19 14:07:28,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 14:07:28,032 INFO L242 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2022-01-19 14:07:28,033 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2022-01-19 14:07:28,035 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2022-01-19 14:07:28,035 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2022-01-19 14:07:28,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:28,036 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:28,036 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 14:07:28,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 14:07:28,036 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:28,036 INFO L85 PathProgramCache]: Analyzing trace with hash 653583360, now seen corresponding path program 1 times [2022-01-19 14:07:28,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:28,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290641246] [2022-01-19 14:07:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:28,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:28,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:28,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290641246] [2022-01-19 14:07:28,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290641246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:07:28,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:07:28,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:07:28,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650506657] [2022-01-19 14:07:28,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:07:28,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:07:28,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:28,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:07:28,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:07:28,194 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-01-19 14:07:28,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:28,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:28,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-01-19 14:07:28,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:28,284 INFO L129 PetriNetUnfolder]: 8/111 cut-off events. [2022-01-19 14:07:28,284 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-01-19 14:07:28,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 111 events. 8/111 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 176 event pairs, 1 based on Foata normal form. 4/107 useless extension candidates. Maximal degree in co-relation 144. Up to 19 conditions per place. [2022-01-19 14:07:28,285 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 2 changer transitions 5/77 dead transitions. [2022-01-19 14:07:28,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 205 flow [2022-01-19 14:07:28,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 14:07:28,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 14:07:28,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2022-01-19 14:07:28,291 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8022988505747126 [2022-01-19 14:07:28,291 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2022-01-19 14:07:28,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2022-01-19 14:07:28,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:28,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2022-01-19 14:07:28,294 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 14:07:28,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:28,295 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:28,295 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 5 states and 349 transitions. [2022-01-19 14:07:28,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 205 flow [2022-01-19 14:07:28,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 14:07:28,297 INFO L242 Difference]: Finished difference. Result has 79 places, 71 transitions, 162 flow [2022-01-19 14:07:28,297 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-01-19 14:07:28,298 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 2 predicate places. [2022-01-19 14:07:28,298 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 162 flow [2022-01-19 14:07:28,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:28,299 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:28,299 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:07:28,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 14:07:28,299 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:28,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:28,299 INFO L85 PathProgramCache]: Analyzing trace with hash -824748536, now seen corresponding path program 1 times [2022-01-19 14:07:28,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:28,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316908672] [2022-01-19 14:07:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:28,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:28,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:28,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316908672] [2022-01-19 14:07:28,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316908672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:28,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377238834] [2022-01-19 14:07:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:28,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:28,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:28,444 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:28,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 14:07:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:28,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 14:07:28,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:28,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:28,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377238834] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:28,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-19 14:07:28,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-01-19 14:07:28,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244667402] [2022-01-19 14:07:28,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:07:28,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 14:07:28,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 14:07:28,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-19 14:07:28,773 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 87 [2022-01-19 14:07:28,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:28,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:28,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 87 [2022-01-19 14:07:28,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:28,830 INFO L129 PetriNetUnfolder]: 42/189 cut-off events. [2022-01-19 14:07:28,830 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-01-19 14:07:28,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 189 events. 42/189 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 706 event pairs, 12 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 300. Up to 38 conditions per place. [2022-01-19 14:07:28,833 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 18 selfloop transitions, 5 changer transitions 3/83 dead transitions. [2022-01-19 14:07:28,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 83 transitions, 242 flow [2022-01-19 14:07:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 14:07:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 14:07:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2022-01-19 14:07:28,837 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8591954022988506 [2022-01-19 14:07:28,839 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2022-01-19 14:07:28,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2022-01-19 14:07:28,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:28,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2022-01-19 14:07:28,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:28,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:28,845 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:28,845 INFO L186 Difference]: Start difference. First operand has 79 places, 71 transitions, 162 flow. Second operand 4 states and 299 transitions. [2022-01-19 14:07:28,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 83 transitions, 242 flow [2022-01-19 14:07:28,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 83 transitions, 236 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 14:07:28,847 INFO L242 Difference]: Finished difference. Result has 80 places, 75 transitions, 192 flow [2022-01-19 14:07:28,848 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2022-01-19 14:07:28,850 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-01-19 14:07:28,850 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 192 flow [2022-01-19 14:07:28,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:28,850 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:28,850 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:07:28,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 14:07:29,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:29,069 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:29,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:29,069 INFO L85 PathProgramCache]: Analyzing trace with hash 565393570, now seen corresponding path program 2 times [2022-01-19 14:07:29,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:29,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746342512] [2022-01-19 14:07:29,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:29,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:29,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:29,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746342512] [2022-01-19 14:07:29,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746342512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:07:29,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:07:29,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:07:29,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138531386] [2022-01-19 14:07:29,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:07:29,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:07:29,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:29,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:07:29,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:07:29,142 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-01-19 14:07:29,143 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:29,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:29,143 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-01-19 14:07:29,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:29,217 INFO L129 PetriNetUnfolder]: 85/313 cut-off events. [2022-01-19 14:07:29,217 INFO L130 PetriNetUnfolder]: For 115/124 co-relation queries the response was YES. [2022-01-19 14:07:29,218 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 313 events. 85/313 cut-off events. For 115/124 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1507 event pairs, 28 based on Foata normal form. 7/313 useless extension candidates. Maximal degree in co-relation 637. Up to 107 conditions per place. [2022-01-19 14:07:29,219 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 38 selfloop transitions, 8 changer transitions 11/111 dead transitions. [2022-01-19 14:07:29,219 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 438 flow [2022-01-19 14:07:29,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:07:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:07:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 441 transitions. [2022-01-19 14:07:29,221 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8448275862068966 [2022-01-19 14:07:29,221 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 441 transitions. [2022-01-19 14:07:29,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 441 transitions. [2022-01-19 14:07:29,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:29,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 441 transitions. [2022-01-19 14:07:29,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.5) internal successors, (441), 6 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:29,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:29,223 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:29,223 INFO L186 Difference]: Start difference. First operand has 80 places, 75 transitions, 192 flow. Second operand 6 states and 441 transitions. [2022-01-19 14:07:29,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 438 flow [2022-01-19 14:07:29,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 438 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 14:07:29,227 INFO L242 Difference]: Finished difference. Result has 89 places, 82 transitions, 268 flow [2022-01-19 14:07:29,227 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=89, PETRI_TRANSITIONS=82} [2022-01-19 14:07:29,228 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 12 predicate places. [2022-01-19 14:07:29,228 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 82 transitions, 268 flow [2022-01-19 14:07:29,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:29,228 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:29,228 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:07:29,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 14:07:29,228 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:29,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:29,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1895955256, now seen corresponding path program 3 times [2022-01-19 14:07:29,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:29,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559408589] [2022-01-19 14:07:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:29,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:29,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:29,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559408589] [2022-01-19 14:07:29,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559408589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:29,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694184583] [2022-01-19 14:07:29,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:07:29,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:29,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:29,331 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:29,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 14:07:29,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 14:07:29,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:07:29,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 14:07:29,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:29,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:29,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694184583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:29,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:29,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-19 14:07:29,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560914444] [2022-01-19 14:07:29,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:29,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 14:07:29,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:29,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 14:07:29,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-19 14:07:29,659 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-01-19 14:07:29,660 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 82 transitions, 268 flow. Second operand has 9 states, 9 states have (on average 67.55555555555556) internal successors, (608), 9 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:29,660 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:29,660 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-01-19 14:07:29,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:29,778 INFO L129 PetriNetUnfolder]: 111/369 cut-off events. [2022-01-19 14:07:29,778 INFO L130 PetriNetUnfolder]: For 348/348 co-relation queries the response was YES. [2022-01-19 14:07:29,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 369 events. 111/369 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1628 event pairs, 19 based on Foata normal form. 9/371 useless extension candidates. Maximal degree in co-relation 931. Up to 83 conditions per place. [2022-01-19 14:07:29,781 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 47 selfloop transitions, 20 changer transitions 2/123 dead transitions. [2022-01-19 14:07:29,781 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 123 transitions, 594 flow [2022-01-19 14:07:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 14:07:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 14:07:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 578 transitions. [2022-01-19 14:07:29,782 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8304597701149425 [2022-01-19 14:07:29,782 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 578 transitions. [2022-01-19 14:07:29,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 578 transitions. [2022-01-19 14:07:29,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:29,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 578 transitions. [2022-01-19 14:07:29,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.25) internal successors, (578), 8 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:29,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:29,785 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:29,785 INFO L186 Difference]: Start difference. First operand has 89 places, 82 transitions, 268 flow. Second operand 8 states and 578 transitions. [2022-01-19 14:07:29,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 123 transitions, 594 flow [2022-01-19 14:07:29,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 123 transitions, 588 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-01-19 14:07:29,789 INFO L242 Difference]: Finished difference. Result has 99 places, 93 transitions, 427 flow [2022-01-19 14:07:29,789 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=427, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2022-01-19 14:07:29,790 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 22 predicate places. [2022-01-19 14:07:29,790 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 427 flow [2022-01-19 14:07:29,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 67.55555555555556) internal successors, (608), 9 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:29,790 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:29,790 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:07:29,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 14:07:30,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:30,004 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:30,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:30,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2095100888, now seen corresponding path program 4 times [2022-01-19 14:07:30,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:30,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811537930] [2022-01-19 14:07:30,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:30,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:30,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:30,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811537930] [2022-01-19 14:07:30,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811537930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:07:30,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:07:30,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:07:30,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71813878] [2022-01-19 14:07:30,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:07:30,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:07:30,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:30,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:07:30,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:07:30,062 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-01-19 14:07:30,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 427 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:30,062 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:30,062 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-01-19 14:07:30,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:30,139 INFO L129 PetriNetUnfolder]: 110/332 cut-off events. [2022-01-19 14:07:30,140 INFO L130 PetriNetUnfolder]: For 773/775 co-relation queries the response was YES. [2022-01-19 14:07:30,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 332 events. 110/332 cut-off events. For 773/775 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1380 event pairs, 40 based on Foata normal form. 2/327 useless extension candidates. Maximal degree in co-relation 1046. Up to 120 conditions per place. [2022-01-19 14:07:30,143 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 37 selfloop transitions, 9 changer transitions 2/102 dead transitions. [2022-01-19 14:07:30,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 102 transitions, 570 flow [2022-01-19 14:07:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:07:30,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:07:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 421 transitions. [2022-01-19 14:07:30,144 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8065134099616859 [2022-01-19 14:07:30,145 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 421 transitions. [2022-01-19 14:07:30,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 421 transitions. [2022-01-19 14:07:30,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:30,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 421 transitions. [2022-01-19 14:07:30,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.16666666666667) internal successors, (421), 6 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:30,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:30,147 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:30,147 INFO L186 Difference]: Start difference. First operand has 99 places, 93 transitions, 427 flow. Second operand 6 states and 421 transitions. [2022-01-19 14:07:30,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 102 transitions, 570 flow [2022-01-19 14:07:30,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 102 transitions, 550 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-01-19 14:07:30,154 INFO L242 Difference]: Finished difference. Result has 105 places, 93 transitions, 440 flow [2022-01-19 14:07:30,154 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=440, PETRI_PLACES=105, PETRI_TRANSITIONS=93} [2022-01-19 14:07:30,156 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 28 predicate places. [2022-01-19 14:07:30,156 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 93 transitions, 440 flow [2022-01-19 14:07:30,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:30,156 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:30,156 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:07:30,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 14:07:30,158 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:30,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:30,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1438588188, now seen corresponding path program 1 times [2022-01-19 14:07:30,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:30,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324483838] [2022-01-19 14:07:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:30,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:30,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:30,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324483838] [2022-01-19 14:07:30,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324483838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:30,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028401083] [2022-01-19 14:07:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:30,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:30,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:30,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:30,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 14:07:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:30,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 14:07:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:30,408 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 14:07:30,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:30,526 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 14:07:30,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028401083] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:30,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:30,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2022-01-19 14:07:30,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099531247] [2022-01-19 14:07:30,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:30,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 14:07:30,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:30,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 14:07:30,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-19 14:07:30,528 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:07:30,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 93 transitions, 440 flow. Second operand has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:30,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:30,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:07:30,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:30,609 INFO L129 PetriNetUnfolder]: 61/380 cut-off events. [2022-01-19 14:07:30,609 INFO L130 PetriNetUnfolder]: For 829/850 co-relation queries the response was YES. [2022-01-19 14:07:30,610 INFO L84 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 380 events. 61/380 cut-off events. For 829/850 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1898 event pairs, 13 based on Foata normal form. 11/384 useless extension candidates. Maximal degree in co-relation 967. Up to 45 conditions per place. [2022-01-19 14:07:30,611 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 22 selfloop transitions, 7 changer transitions 5/109 dead transitions. [2022-01-19 14:07:30,611 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 109 transitions, 552 flow [2022-01-19 14:07:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 14:07:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 14:07:30,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2022-01-19 14:07:30,613 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7816091954022989 [2022-01-19 14:07:30,613 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2022-01-19 14:07:30,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2022-01-19 14:07:30,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:30,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2022-01-19 14:07:30,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:30,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:30,615 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:30,615 INFO L186 Difference]: Start difference. First operand has 105 places, 93 transitions, 440 flow. Second operand 7 states and 476 transitions. [2022-01-19 14:07:30,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 109 transitions, 552 flow [2022-01-19 14:07:30,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 109 transitions, 518 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-01-19 14:07:30,620 INFO L242 Difference]: Finished difference. Result has 107 places, 96 transitions, 454 flow [2022-01-19 14:07:30,620 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=454, PETRI_PLACES=107, PETRI_TRANSITIONS=96} [2022-01-19 14:07:30,621 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 30 predicate places. [2022-01-19 14:07:30,621 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 96 transitions, 454 flow [2022-01-19 14:07:30,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:30,621 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:30,621 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:07:30,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 14:07:30,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:30,836 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:30,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:30,836 INFO L85 PathProgramCache]: Analyzing trace with hash -664902924, now seen corresponding path program 2 times [2022-01-19 14:07:30,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:30,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748731181] [2022-01-19 14:07:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:30,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:30,937 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 14:07:30,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:30,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748731181] [2022-01-19 14:07:30,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748731181] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:30,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495548965] [2022-01-19 14:07:30,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:07:30,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:30,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:30,939 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:30,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 14:07:30,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:07:30,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:07:30,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:07:30,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:31,151 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 14:07:31,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:31,325 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 14:07:31,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495548965] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:31,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:31,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-19 14:07:31,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615735747] [2022-01-19 14:07:31,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:31,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 14:07:31,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:31,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 14:07:31,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-01-19 14:07:31,330 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:07:31,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 96 transitions, 454 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:31,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:31,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:07:31,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:31,895 INFO L129 PetriNetUnfolder]: 343/992 cut-off events. [2022-01-19 14:07:31,895 INFO L130 PetriNetUnfolder]: For 2196/2202 co-relation queries the response was YES. [2022-01-19 14:07:31,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 992 events. 343/992 cut-off events. For 2196/2202 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6084 event pairs, 60 based on Foata normal form. 5/992 useless extension candidates. Maximal degree in co-relation 3146. Up to 170 conditions per place. [2022-01-19 14:07:31,901 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 89 selfloop transitions, 46 changer transitions 9/198 dead transitions. [2022-01-19 14:07:31,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 198 transitions, 1378 flow [2022-01-19 14:07:31,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-19 14:07:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-01-19 14:07:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1556 transitions. [2022-01-19 14:07:31,905 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7776111944027986 [2022-01-19 14:07:31,905 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1556 transitions. [2022-01-19 14:07:31,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1556 transitions. [2022-01-19 14:07:31,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:31,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1556 transitions. [2022-01-19 14:07:31,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 67.65217391304348) internal successors, (1556), 23 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:31,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 87.0) internal successors, (2088), 24 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:31,912 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 87.0) internal successors, (2088), 24 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:31,912 INFO L186 Difference]: Start difference. First operand has 107 places, 96 transitions, 454 flow. Second operand 23 states and 1556 transitions. [2022-01-19 14:07:31,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 198 transitions, 1378 flow [2022-01-19 14:07:31,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 198 transitions, 1352 flow, removed 12 selfloop flow, removed 3 redundant places. [2022-01-19 14:07:31,918 INFO L242 Difference]: Finished difference. Result has 138 places, 128 transitions, 865 flow [2022-01-19 14:07:31,919 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=865, PETRI_PLACES=138, PETRI_TRANSITIONS=128} [2022-01-19 14:07:31,920 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 61 predicate places. [2022-01-19 14:07:31,921 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 128 transitions, 865 flow [2022-01-19 14:07:31,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:31,921 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:31,921 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:07:31,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 14:07:32,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:32,137 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:32,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:32,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1281276886, now seen corresponding path program 3 times [2022-01-19 14:07:32,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:32,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766821905] [2022-01-19 14:07:32,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:32,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:32,227 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 14:07:32,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:32,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766821905] [2022-01-19 14:07:32,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766821905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:32,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990454636] [2022-01-19 14:07:32,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:07:32,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:32,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:32,229 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:32,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 14:07:32,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 14:07:32,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:07:32,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:07:32,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:32,435 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 14:07:32,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:32,588 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 14:07:32,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990454636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:32,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:32,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-19 14:07:32,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671704638] [2022-01-19 14:07:32,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:32,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 14:07:32,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:32,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 14:07:32,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-01-19 14:07:32,590 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:07:32,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 128 transitions, 865 flow. Second operand has 16 states, 16 states have (on average 65.5) internal successors, (1048), 16 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:32,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:32,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:07:32,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:33,596 INFO L129 PetriNetUnfolder]: 510/1339 cut-off events. [2022-01-19 14:07:33,596 INFO L130 PetriNetUnfolder]: For 5950/5958 co-relation queries the response was YES. [2022-01-19 14:07:33,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5665 conditions, 1339 events. 510/1339 cut-off events. For 5950/5958 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 8575 event pairs, 25 based on Foata normal form. 22/1352 useless extension candidates. Maximal degree in co-relation 5633. Up to 143 conditions per place. [2022-01-19 14:07:33,607 INFO L132 encePairwiseOnDemand]: 76/87 looper letters, 132 selfloop transitions, 174 changer transitions 12/372 dead transitions. [2022-01-19 14:07:33,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 372 transitions, 3609 flow [2022-01-19 14:07:33,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-19 14:07:33,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-01-19 14:07:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3173 transitions. [2022-01-19 14:07:33,612 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7759843482514062 [2022-01-19 14:07:33,612 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3173 transitions. [2022-01-19 14:07:33,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3173 transitions. [2022-01-19 14:07:33,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:33,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3173 transitions. [2022-01-19 14:07:33,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.51063829787235) internal successors, (3173), 47 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:33,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:33,623 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:33,623 INFO L186 Difference]: Start difference. First operand has 138 places, 128 transitions, 865 flow. Second operand 47 states and 3173 transitions. [2022-01-19 14:07:33,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 372 transitions, 3609 flow [2022-01-19 14:07:33,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 372 transitions, 3318 flow, removed 110 selfloop flow, removed 10 redundant places. [2022-01-19 14:07:33,640 INFO L242 Difference]: Finished difference. Result has 186 places, 264 transitions, 2469 flow [2022-01-19 14:07:33,641 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2469, PETRI_PLACES=186, PETRI_TRANSITIONS=264} [2022-01-19 14:07:33,641 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 109 predicate places. [2022-01-19 14:07:33,641 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 264 transitions, 2469 flow [2022-01-19 14:07:33,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.5) internal successors, (1048), 16 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:33,642 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:33,642 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:07:33,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 14:07:33,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:33,855 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:33,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:33,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1077969640, now seen corresponding path program 4 times [2022-01-19 14:07:33,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:33,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082552415] [2022-01-19 14:07:33,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:33,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:33,970 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 14:07:33,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:33,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082552415] [2022-01-19 14:07:33,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082552415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:33,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621244741] [2022-01-19 14:07:33,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:07:33,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:33,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:33,971 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:33,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 14:07:34,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:07:34,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:07:34,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:07:34,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:34,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:34,335 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 14:07:34,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621244741] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:34,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:34,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 14:07:34,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979046850] [2022-01-19 14:07:34,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:34,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:07:34,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:34,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:07:34,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:07:34,338 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:07:34,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 264 transitions, 2469 flow. Second operand has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:34,339 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:34,339 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:07:34,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:35,802 INFO L129 PetriNetUnfolder]: 709/2014 cut-off events. [2022-01-19 14:07:35,802 INFO L130 PetriNetUnfolder]: For 13737/13746 co-relation queries the response was YES. [2022-01-19 14:07:35,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9587 conditions, 2014 events. 709/2014 cut-off events. For 13737/13746 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 15185 event pairs, 7 based on Foata normal form. 10/2017 useless extension candidates. Maximal degree in co-relation 9543. Up to 218 conditions per place. [2022-01-19 14:07:35,824 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 225 selfloop transitions, 264 changer transitions 39/582 dead transitions. [2022-01-19 14:07:35,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 582 transitions, 6856 flow [2022-01-19 14:07:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-19 14:07:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-01-19 14:07:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4777 transitions. [2022-01-19 14:07:35,829 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7733527602395985 [2022-01-19 14:07:35,829 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4777 transitions. [2022-01-19 14:07:35,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4777 transitions. [2022-01-19 14:07:35,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:35,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4777 transitions. [2022-01-19 14:07:35,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 67.28169014084507) internal successors, (4777), 71 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:35,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 87.0) internal successors, (6264), 72 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:35,843 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 87.0) internal successors, (6264), 72 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:35,843 INFO L186 Difference]: Start difference. First operand has 186 places, 264 transitions, 2469 flow. Second operand 71 states and 4777 transitions. [2022-01-19 14:07:35,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 582 transitions, 6856 flow [2022-01-19 14:07:35,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 582 transitions, 6408 flow, removed 149 selfloop flow, removed 2 redundant places. [2022-01-19 14:07:35,888 INFO L242 Difference]: Finished difference. Result has 277 places, 417 transitions, 4636 flow [2022-01-19 14:07:35,888 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=4636, PETRI_PLACES=277, PETRI_TRANSITIONS=417} [2022-01-19 14:07:35,889 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 200 predicate places. [2022-01-19 14:07:35,889 INFO L470 AbstractCegarLoop]: Abstraction has has 277 places, 417 transitions, 4636 flow [2022-01-19 14:07:35,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:35,889 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:35,890 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:07:35,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 14:07:36,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:36,106 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:36,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:36,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1322624998, now seen corresponding path program 5 times [2022-01-19 14:07:36,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:36,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379081666] [2022-01-19 14:07:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:36,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:36,186 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 14:07:36,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:36,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379081666] [2022-01-19 14:07:36,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379081666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:36,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161695252] [2022-01-19 14:07:36,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:07:36,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:36,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:36,187 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:36,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 14:07:36,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:07:36,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:07:36,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 14:07:36,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:36,403 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 14:07:36,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:36,636 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 14:07:36,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161695252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:36,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:36,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 14:07:36,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34441562] [2022-01-19 14:07:36,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:36,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 14:07:36,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:36,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 14:07:36,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-19 14:07:36,638 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:07:36,639 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 417 transitions, 4636 flow. Second operand has 21 states, 21 states have (on average 65.28571428571429) internal successors, (1371), 21 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:36,639 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:36,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:07:36,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:38,613 INFO L129 PetriNetUnfolder]: 1218/3588 cut-off events. [2022-01-19 14:07:38,613 INFO L130 PetriNetUnfolder]: For 57806/57820 co-relation queries the response was YES. [2022-01-19 14:07:38,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20377 conditions, 3588 events. 1218/3588 cut-off events. For 57806/57820 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31670 event pairs, 67 based on Foata normal form. 34/3604 useless extension candidates. Maximal degree in co-relation 20309. Up to 430 conditions per place. [2022-01-19 14:07:38,648 INFO L132 encePairwiseOnDemand]: 72/87 looper letters, 251 selfloop transitions, 554 changer transitions 5/864 dead transitions. [2022-01-19 14:07:38,648 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 864 transitions, 11929 flow [2022-01-19 14:07:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-19 14:07:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-01-19 14:07:38,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3657 transitions. [2022-01-19 14:07:38,653 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7784163473818646 [2022-01-19 14:07:38,653 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3657 transitions. [2022-01-19 14:07:38,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3657 transitions. [2022-01-19 14:07:38,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:38,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3657 transitions. [2022-01-19 14:07:38,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 67.72222222222223) internal successors, (3657), 54 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:38,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:38,667 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:38,667 INFO L186 Difference]: Start difference. First operand has 277 places, 417 transitions, 4636 flow. Second operand 54 states and 3657 transitions. [2022-01-19 14:07:38,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 864 transitions, 11929 flow [2022-01-19 14:07:38,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 864 transitions, 10547 flow, removed 608 selfloop flow, removed 6 redundant places. [2022-01-19 14:07:38,896 INFO L242 Difference]: Finished difference. Result has 337 places, 713 transitions, 9140 flow [2022-01-19 14:07:38,897 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=9140, PETRI_PLACES=337, PETRI_TRANSITIONS=713} [2022-01-19 14:07:38,897 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 260 predicate places. [2022-01-19 14:07:38,897 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 713 transitions, 9140 flow [2022-01-19 14:07:38,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 65.28571428571429) internal successors, (1371), 21 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:38,898 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:38,898 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:07:38,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 14:07:39,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:39,100 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:39,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1299198750, now seen corresponding path program 6 times [2022-01-19 14:07:39,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:39,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946146623] [2022-01-19 14:07:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:39,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:39,184 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 14:07:39,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:39,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946146623] [2022-01-19 14:07:39,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946146623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:39,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085049907] [2022-01-19 14:07:39,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:07:39,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:39,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:39,186 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:39,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 14:07:39,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 14:07:39,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:07:39,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:07:39,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:39,388 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 14:07:39,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:39,567 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 14:07:39,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085049907] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:39,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:39,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-19 14:07:39,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301740796] [2022-01-19 14:07:39,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:39,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 14:07:39,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:39,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 14:07:39,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-19 14:07:39,569 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:07:39,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 713 transitions, 9140 flow. Second operand has 20 states, 20 states have (on average 65.3) internal successors, (1306), 20 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:39,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:39,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:07:39,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:42,745 INFO L129 PetriNetUnfolder]: 1744/5140 cut-off events. [2022-01-19 14:07:42,745 INFO L130 PetriNetUnfolder]: For 87893/87911 co-relation queries the response was YES. [2022-01-19 14:07:42,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30648 conditions, 5140 events. 1744/5140 cut-off events. For 87893/87911 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 49796 event pairs, 53 based on Foata normal form. 36/5152 useless extension candidates. Maximal degree in co-relation 30564. Up to 665 conditions per place. [2022-01-19 14:07:42,801 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 255 selfloop transitions, 887 changer transitions 11/1207 dead transitions. [2022-01-19 14:07:42,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1207 transitions, 18397 flow [2022-01-19 14:07:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-19 14:07:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-01-19 14:07:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 7221 transitions. [2022-01-19 14:07:42,807 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7685185185185185 [2022-01-19 14:07:42,807 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 7221 transitions. [2022-01-19 14:07:42,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 7221 transitions. [2022-01-19 14:07:42,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:42,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 7221 transitions. [2022-01-19 14:07:42,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 66.86111111111111) internal successors, (7221), 108 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:42,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:42,823 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:42,824 INFO L186 Difference]: Start difference. First operand has 337 places, 713 transitions, 9140 flow. Second operand 108 states and 7221 transitions. [2022-01-19 14:07:42,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1207 transitions, 18397 flow [2022-01-19 14:07:43,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1207 transitions, 18138 flow, removed 123 selfloop flow, removed 4 redundant places. [2022-01-19 14:07:43,167 INFO L242 Difference]: Finished difference. Result has 471 places, 1049 transitions, 16429 flow [2022-01-19 14:07:43,167 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=9087, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=16429, PETRI_PLACES=471, PETRI_TRANSITIONS=1049} [2022-01-19 14:07:43,168 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 394 predicate places. [2022-01-19 14:07:43,168 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 1049 transitions, 16429 flow [2022-01-19 14:07:43,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.3) internal successors, (1306), 20 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:43,168 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:43,168 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:07:43,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 14:07:43,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 14:07:43,374 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:43,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:43,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1287637296, now seen corresponding path program 7 times [2022-01-19 14:07:43,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:43,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597315384] [2022-01-19 14:07:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:43,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:43,475 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 14:07:43,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:43,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597315384] [2022-01-19 14:07:43,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597315384] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:43,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098802247] [2022-01-19 14:07:43,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:07:43,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:43,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:43,478 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:43,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 14:07:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:43,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:07:43,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:43,683 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 14:07:43,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:43,838 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 14:07:43,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098802247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:43,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:43,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 14:07:43,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120895573] [2022-01-19 14:07:43,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:43,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:07:43,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:43,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:07:43,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:07:43,840 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:07:43,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1049 transitions, 16429 flow. Second operand has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:43,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:43,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:07:43,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:47,126 INFO L129 PetriNetUnfolder]: 2332/6723 cut-off events. [2022-01-19 14:07:47,126 INFO L130 PetriNetUnfolder]: For 149849/149865 co-relation queries the response was YES. [2022-01-19 14:07:47,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45589 conditions, 6723 events. 2332/6723 cut-off events. For 149849/149865 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 68695 event pairs, 88 based on Foata normal form. 36/6731 useless extension candidates. Maximal degree in co-relation 45475. Up to 854 conditions per place. [2022-01-19 14:07:47,214 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 282 selfloop transitions, 1271 changer transitions 6/1613 dead transitions. [2022-01-19 14:07:47,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 1613 transitions, 28646 flow [2022-01-19 14:07:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-19 14:07:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-01-19 14:07:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 5263 transitions. [2022-01-19 14:07:47,219 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7657500363742179 [2022-01-19 14:07:47,219 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 5263 transitions. [2022-01-19 14:07:47,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 5263 transitions. [2022-01-19 14:07:47,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:47,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 5263 transitions. [2022-01-19 14:07:47,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 66.62025316455696) internal successors, (5263), 79 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:47,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:47,231 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:47,231 INFO L186 Difference]: Start difference. First operand has 471 places, 1049 transitions, 16429 flow. Second operand 79 states and 5263 transitions. [2022-01-19 14:07:47,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 1613 transitions, 28646 flow [2022-01-19 14:07:48,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 1613 transitions, 27473 flow, removed 291 selfloop flow, removed 30 redundant places. [2022-01-19 14:07:48,116 INFO L242 Difference]: Finished difference. Result has 552 places, 1519 transitions, 27372 flow [2022-01-19 14:07:48,117 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15527, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1048, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=802, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=27372, PETRI_PLACES=552, PETRI_TRANSITIONS=1519} [2022-01-19 14:07:48,117 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 475 predicate places. [2022-01-19 14:07:48,117 INFO L470 AbstractCegarLoop]: Abstraction has has 552 places, 1519 transitions, 27372 flow [2022-01-19 14:07:48,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:48,118 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:48,118 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:07:48,133 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 14:07:48,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 14:07:48,331 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:48,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:48,332 INFO L85 PathProgramCache]: Analyzing trace with hash 41325334, now seen corresponding path program 8 times [2022-01-19 14:07:48,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:48,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771256203] [2022-01-19 14:07:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:48,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:48,406 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 14:07:48,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:48,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771256203] [2022-01-19 14:07:48,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771256203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:48,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110120354] [2022-01-19 14:07:48,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:07:48,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:48,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:48,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:48,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 14:07:48,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:07:48,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:07:48,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:07:48,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:48,572 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 14:07:48,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:48,746 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 14:07:48,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110120354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:48,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:48,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 14:07:48,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856308507] [2022-01-19 14:07:48,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:48,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 14:07:48,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 14:07:48,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-19 14:07:48,748 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:07:48,748 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 1519 transitions, 27372 flow. Second operand has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:48,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:48,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:07:48,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:54,448 INFO L129 PetriNetUnfolder]: 3627/10432 cut-off events. [2022-01-19 14:07:54,449 INFO L130 PetriNetUnfolder]: For 268855/268873 co-relation queries the response was YES. [2022-01-19 14:07:54,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77244 conditions, 10432 events. 3627/10432 cut-off events. For 268855/268873 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 114513 event pairs, 307 based on Foata normal form. 16/10297 useless extension candidates. Maximal degree in co-relation 77101. Up to 1646 conditions per place. [2022-01-19 14:07:54,602 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 866 selfloop transitions, 1692 changer transitions 6/2618 dead transitions. [2022-01-19 14:07:54,602 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 2618 transitions, 53706 flow [2022-01-19 14:07:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-19 14:07:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2022-01-19 14:07:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 6267 transitions. [2022-01-19 14:07:54,607 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7663242846661775 [2022-01-19 14:07:54,607 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 6267 transitions. [2022-01-19 14:07:54,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 6267 transitions. [2022-01-19 14:07:54,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:54,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 6267 transitions. [2022-01-19 14:07:54,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 66.67021276595744) internal successors, (6267), 94 states have internal predecessors, (6267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:54,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 87.0) internal successors, (8265), 95 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:54,621 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 87.0) internal successors, (8265), 95 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:54,621 INFO L186 Difference]: Start difference. First operand has 552 places, 1519 transitions, 27372 flow. Second operand 94 states and 6267 transitions. [2022-01-19 14:07:54,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 2618 transitions, 53706 flow [2022-01-19 14:07:57,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 2618 transitions, 53459 flow, removed 49 selfloop flow, removed 13 redundant places. [2022-01-19 14:07:57,138 INFO L242 Difference]: Finished difference. Result has 662 places, 2435 transitions, 51170 flow [2022-01-19 14:07:57,140 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=27165, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=51170, PETRI_PLACES=662, PETRI_TRANSITIONS=2435} [2022-01-19 14:07:57,140 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 585 predicate places. [2022-01-19 14:07:57,140 INFO L470 AbstractCegarLoop]: Abstraction has has 662 places, 2435 transitions, 51170 flow [2022-01-19 14:07:57,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:57,141 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:57,141 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:07:57,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 14:07:57,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 14:07:57,355 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1361762118, now seen corresponding path program 9 times [2022-01-19 14:07:57,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:57,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782349048] [2022-01-19 14:07:57,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:57,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:57,435 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 14:07:57,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:57,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782349048] [2022-01-19 14:07:57,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782349048] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:57,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459683382] [2022-01-19 14:07:57,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:07:57,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:57,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:57,436 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:57,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 14:07:57,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 14:07:57,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:07:57,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:07:57,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:57,617 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 14:07:57,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:57,786 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 14:07:57,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459683382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:57,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:57,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 14:07:57,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676325500] [2022-01-19 14:07:57,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:57,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 14:07:57,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:57,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 14:07:57,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-19 14:07:57,788 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:07:57,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 2435 transitions, 51170 flow. Second operand has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:57,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:57,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:07:57,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:08:06,380 INFO L129 PetriNetUnfolder]: 4556/13004 cut-off events. [2022-01-19 14:08:06,381 INFO L130 PetriNetUnfolder]: For 431492/431524 co-relation queries the response was YES. [2022-01-19 14:08:06,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108838 conditions, 13004 events. 4556/13004 cut-off events. For 431492/431524 co-relation queries the response was YES. Maximal size of possible extension queue 971. Compared 147728 event pairs, 381 based on Foata normal form. 15/12822 useless extension candidates. Maximal degree in co-relation 108666. Up to 2428 conditions per place. [2022-01-19 14:08:06,649 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 1162 selfloop transitions, 1811 changer transitions 6/3033 dead transitions. [2022-01-19 14:08:06,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 3033 transitions, 70163 flow [2022-01-19 14:08:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 14:08:06,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 14:08:06,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3864 transitions. [2022-01-19 14:08:06,653 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.779189352692075 [2022-01-19 14:08:06,653 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3864 transitions. [2022-01-19 14:08:06,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3864 transitions. [2022-01-19 14:08:06,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:08:06,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3864 transitions. [2022-01-19 14:08:06,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 67.78947368421052) internal successors, (3864), 57 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:06,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 87.0) internal successors, (5046), 58 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:06,663 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 87.0) internal successors, (5046), 58 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:06,663 INFO L186 Difference]: Start difference. First operand has 662 places, 2435 transitions, 51170 flow. Second operand 57 states and 3864 transitions. [2022-01-19 14:08:06,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 3033 transitions, 70163 flow [2022-01-19 14:08:14,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 3033 transitions, 67424 flow, removed 1358 selfloop flow, removed 3 redundant places. [2022-01-19 14:08:14,403 INFO L242 Difference]: Finished difference. Result has 732 places, 2863 transitions, 64007 flow [2022-01-19 14:08:14,405 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=49313, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=64007, PETRI_PLACES=732, PETRI_TRANSITIONS=2863} [2022-01-19 14:08:14,406 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 655 predicate places. [2022-01-19 14:08:14,406 INFO L470 AbstractCegarLoop]: Abstraction has has 732 places, 2863 transitions, 64007 flow [2022-01-19 14:08:14,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:14,406 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:08:14,406 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:08:14,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 14:08:14,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 14:08:14,618 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:08:14,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:08:14,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1238803636, now seen corresponding path program 10 times [2022-01-19 14:08:14,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:08:14,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999220476] [2022-01-19 14:08:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:08:14,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:08:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:08:14,707 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 14:08:14,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:08:14,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999220476] [2022-01-19 14:08:14,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999220476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:08:14,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498779570] [2022-01-19 14:08:14,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:08:14,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:08:14,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:08:14,710 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:08:14,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 14:08:14,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:08:14,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:08:14,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:08:14,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:08:14,896 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 14:08:14,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:08:15,062 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 14:08:15,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498779570] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:08:15,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:08:15,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 14:08:15,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887145202] [2022-01-19 14:08:15,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:08:15,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:08:15,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:08:15,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:08:15,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:08:15,064 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:08:15,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 2863 transitions, 64007 flow. Second operand has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:15,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:08:15,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:08:15,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:08:27,538 INFO L129 PetriNetUnfolder]: 4829/13945 cut-off events. [2022-01-19 14:08:27,538 INFO L130 PetriNetUnfolder]: For 411844/411880 co-relation queries the response was YES. [2022-01-19 14:08:27,735 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117434 conditions, 13945 events. 4829/13945 cut-off events. For 411844/411880 co-relation queries the response was YES. Maximal size of possible extension queue 1092. Compared 161731 event pairs, 433 based on Foata normal form. 43/13788 useless extension candidates. Maximal degree in co-relation 117243. Up to 1944 conditions per place. [2022-01-19 14:08:27,807 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 631 selfloop transitions, 2562 changer transitions 1/3248 dead transitions. [2022-01-19 14:08:27,807 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 860 places, 3248 transitions, 78226 flow [2022-01-19 14:08:27,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-19 14:08:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2022-01-19 14:08:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 8662 transitions. [2022-01-19 14:08:27,812 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7658709106984969 [2022-01-19 14:08:27,812 INFO L72 ComplementDD]: Start complementDD. Operand 130 states and 8662 transitions. [2022-01-19 14:08:27,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 8662 transitions. [2022-01-19 14:08:27,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:08:27,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 130 states and 8662 transitions. [2022-01-19 14:08:27,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 131 states, 130 states have (on average 66.63076923076923) internal successors, (8662), 130 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:27,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:27,830 INFO L81 ComplementDD]: Finished complementDD. Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:27,830 INFO L186 Difference]: Start difference. First operand has 732 places, 2863 transitions, 64007 flow. Second operand 130 states and 8662 transitions. [2022-01-19 14:08:27,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 860 places, 3248 transitions, 78226 flow [2022-01-19 14:08:33,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 3248 transitions, 77693 flow, removed 232 selfloop flow, removed 8 redundant places. [2022-01-19 14:08:33,842 INFO L242 Difference]: Finished difference. Result has 876 places, 3104 transitions, 76734 flow [2022-01-19 14:08:33,844 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=63474, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=76734, PETRI_PLACES=876, PETRI_TRANSITIONS=3104} [2022-01-19 14:08:33,845 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 799 predicate places. [2022-01-19 14:08:33,845 INFO L470 AbstractCegarLoop]: Abstraction has has 876 places, 3104 transitions, 76734 flow [2022-01-19 14:08:33,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:33,845 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:08:33,845 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:08:33,862 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 14:08:34,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-19 14:08:34,059 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:08:34,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:08:34,060 INFO L85 PathProgramCache]: Analyzing trace with hash 262790282, now seen corresponding path program 11 times [2022-01-19 14:08:34,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:08:34,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890628566] [2022-01-19 14:08:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:08:34,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:08:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:08:34,165 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 14:08:34,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:08:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890628566] [2022-01-19 14:08:34,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890628566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:08:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810692199] [2022-01-19 14:08:34,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:08:34,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:08:34,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:08:34,166 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:08:34,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 14:08:34,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:08:34,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:08:34,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 14:08:34,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:08:34,380 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 14:08:34,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:08:34,601 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 14:08:34,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810692199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:08:34,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:08:34,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-19 14:08:34,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238535583] [2022-01-19 14:08:34,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:08:34,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 14:08:34,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:08:34,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 14:08:34,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-19 14:08:34,603 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:08:34,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 876 places, 3104 transitions, 76734 flow. Second operand has 22 states, 22 states have (on average 65.0909090909091) internal successors, (1432), 22 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:34,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:08:34,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:08:34,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:08:53,269 INFO L129 PetriNetUnfolder]: 7737/22351 cut-off events. [2022-01-19 14:08:53,270 INFO L130 PetriNetUnfolder]: For 773389/773411 co-relation queries the response was YES. [2022-01-19 14:08:53,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 197699 conditions, 22351 events. 7737/22351 cut-off events. For 773389/773411 co-relation queries the response was YES. Maximal size of possible extension queue 1700. Compared 278491 event pairs, 768 based on Foata normal form. 17/22033 useless extension candidates. Maximal degree in co-relation 197484. Up to 3287 conditions per place. [2022-01-19 14:08:53,933 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 1809 selfloop transitions, 3057 changer transitions 22/4942 dead transitions. [2022-01-19 14:08:53,933 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 945 places, 4942 transitions, 131960 flow [2022-01-19 14:08:53,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 14:08:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 14:08:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4702 transitions. [2022-01-19 14:08:53,936 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7720853858784893 [2022-01-19 14:08:53,936 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4702 transitions. [2022-01-19 14:08:53,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4702 transitions. [2022-01-19 14:08:53,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:08:53,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4702 transitions. [2022-01-19 14:08:53,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 67.17142857142858) internal successors, (4702), 70 states have internal predecessors, (4702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:53,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 87.0) internal successors, (6177), 71 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:53,945 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 87.0) internal successors, (6177), 71 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:53,945 INFO L186 Difference]: Start difference. First operand has 876 places, 3104 transitions, 76734 flow. Second operand 70 states and 4702 transitions. [2022-01-19 14:08:53,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 945 places, 4942 transitions, 131960 flow [2022-01-19 14:09:06,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 4942 transitions, 129507 flow, removed 285 selfloop flow, removed 59 redundant places. [2022-01-19 14:09:06,790 INFO L242 Difference]: Finished difference. Result has 923 places, 4694 transitions, 128059 flow [2022-01-19 14:09:06,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=75105, PETRI_DIFFERENCE_MINUEND_PLACES=817, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1768, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1018, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=128059, PETRI_PLACES=923, PETRI_TRANSITIONS=4694} [2022-01-19 14:09:06,793 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 846 predicate places. [2022-01-19 14:09:06,793 INFO L470 AbstractCegarLoop]: Abstraction has has 923 places, 4694 transitions, 128059 flow [2022-01-19 14:09:06,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 65.0909090909091) internal successors, (1432), 22 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:06,793 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:09:06,793 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:09:06,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-19 14:09:06,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-19 14:09:06,994 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:09:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:09:06,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1258186080, now seen corresponding path program 12 times [2022-01-19 14:09:06,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:09:06,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926677908] [2022-01-19 14:09:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:09:06,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:09:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:09:07,079 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 14:09:07,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:09:07,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926677908] [2022-01-19 14:09:07,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926677908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:09:07,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937431596] [2022-01-19 14:09:07,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:09:07,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:09:07,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:09:07,081 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:09:07,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 14:09:07,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 14:09:07,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:09:07,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:09:07,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:09:07,292 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 14:09:07,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:09:07,437 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 14:09:07,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937431596] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:09:07,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:09:07,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 14:09:07,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578233704] [2022-01-19 14:09:07,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:09:07,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:09:07,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:09:07,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:09:07,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:09:07,439 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:09:07,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 923 places, 4694 transitions, 128059 flow. Second operand has 19 states, 19 states have (on average 65.21052631578948) internal successors, (1239), 19 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:07,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:09:07,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:09:07,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:09:36,439 INFO L129 PetriNetUnfolder]: 8050/23040 cut-off events. [2022-01-19 14:09:36,440 INFO L130 PetriNetUnfolder]: For 1049489/1049543 co-relation queries the response was YES. [2022-01-19 14:09:37,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 224860 conditions, 23040 events. 8050/23040 cut-off events. For 1049489/1049543 co-relation queries the response was YES. Maximal size of possible extension queue 1743. Compared 287041 event pairs, 731 based on Foata normal form. 46/22716 useless extension candidates. Maximal degree in co-relation 224613. Up to 3302 conditions per place. [2022-01-19 14:09:37,295 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 995 selfloop transitions, 4020 changer transitions 5/5074 dead transitions. [2022-01-19 14:09:37,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 5074 transitions, 147461 flow [2022-01-19 14:09:37,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-19 14:09:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-01-19 14:09:37,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5583 transitions. [2022-01-19 14:09:37,298 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7731616119651018 [2022-01-19 14:09:37,298 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5583 transitions. [2022-01-19 14:09:37,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5583 transitions. [2022-01-19 14:09:37,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:09:37,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5583 transitions. [2022-01-19 14:09:37,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 67.26506024096386) internal successors, (5583), 83 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:37,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:37,309 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:37,309 INFO L186 Difference]: Start difference. First operand has 923 places, 4694 transitions, 128059 flow. Second operand 83 states and 5583 transitions. [2022-01-19 14:09:37,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 5074 transitions, 147461 flow [2022-01-19 14:09:55,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 982 places, 5074 transitions, 144531 flow, removed 428 selfloop flow, removed 13 redundant places. [2022-01-19 14:09:55,411 INFO L242 Difference]: Finished difference. Result has 1000 places, 4898 transitions, 144382 flow [2022-01-19 14:09:55,414 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=124810, PETRI_DIFFERENCE_MINUEND_PLACES=900, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3796, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=144382, PETRI_PLACES=1000, PETRI_TRANSITIONS=4898} [2022-01-19 14:09:55,415 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 923 predicate places. [2022-01-19 14:09:55,415 INFO L470 AbstractCegarLoop]: Abstraction has has 1000 places, 4898 transitions, 144382 flow [2022-01-19 14:09:55,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.21052631578948) internal successors, (1239), 19 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:55,415 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:09:55,415 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:09:55,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 14:09:55,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:09:55,616 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:09:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:09:55,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1842044668, now seen corresponding path program 13 times [2022-01-19 14:09:55,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:09:55,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709515550] [2022-01-19 14:09:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:09:55,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:09:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:09:55,698 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 14:09:55,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:09:55,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709515550] [2022-01-19 14:09:55,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709515550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:09:55,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941959782] [2022-01-19 14:09:55,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:09:55,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:09:55,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:09:55,700 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:09:55,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 14:09:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:09:55,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:09:55,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:09:55,863 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 14:09:55,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:09:56,014 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 14:09:56,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941959782] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:09:56,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:09:56,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 14:09:56,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13594226] [2022-01-19 14:09:56,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:09:56,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 14:09:56,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:09:56,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 14:09:56,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-19 14:09:56,016 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:09:56,017 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1000 places, 4898 transitions, 144382 flow. Second operand has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:56,017 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:09:56,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:09:56,017 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:10:36,417 INFO L129 PetriNetUnfolder]: 9677/27387 cut-off events. [2022-01-19 14:10:36,418 INFO L130 PetriNetUnfolder]: For 1464590/1464707 co-relation queries the response was YES. [2022-01-19 14:10:37,626 INFO L84 FinitePrefix]: Finished finitePrefix Result has 289404 conditions, 27387 events. 9677/27387 cut-off events. For 1464590/1464707 co-relation queries the response was YES. Maximal size of possible extension queue 2048. Compared 348540 event pairs, 826 based on Foata normal form. 76/27016 useless extension candidates. Maximal degree in co-relation 289142. Up to 3970 conditions per place. [2022-01-19 14:10:37,792 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 1046 selfloop transitions, 5220 changer transitions 3/6323 dead transitions. [2022-01-19 14:10:37,792 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1073 places, 6323 transitions, 197765 flow [2022-01-19 14:10:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-19 14:10:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-01-19 14:10:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5028 transitions. [2022-01-19 14:10:37,795 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7705747126436782 [2022-01-19 14:10:37,795 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5028 transitions. [2022-01-19 14:10:37,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5028 transitions. [2022-01-19 14:10:37,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:10:37,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5028 transitions. [2022-01-19 14:10:37,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 67.04) internal successors, (5028), 75 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:37,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:37,965 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:37,965 INFO L186 Difference]: Start difference. First operand has 1000 places, 4898 transitions, 144382 flow. Second operand 75 states and 5028 transitions. [2022-01-19 14:10:37,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1073 places, 6323 transitions, 197765 flow [2022-01-19 14:11:06,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1031 places, 6323 transitions, 196178 flow, removed 349 selfloop flow, removed 42 redundant places. [2022-01-19 14:11:07,037 INFO L242 Difference]: Finished difference. Result has 1061 places, 6201 transitions, 199570 flow [2022-01-19 14:11:07,041 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=142927, PETRI_DIFFERENCE_MINUEND_PLACES=957, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3918, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=199570, PETRI_PLACES=1061, PETRI_TRANSITIONS=6201} [2022-01-19 14:11:07,041 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 984 predicate places. [2022-01-19 14:11:07,041 INFO L470 AbstractCegarLoop]: Abstraction has has 1061 places, 6201 transitions, 199570 flow [2022-01-19 14:11:07,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:11:07,041 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:11:07,042 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:11:07,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-19 14:11:07,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:11:07,247 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:11:07,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:11:07,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1245142102, now seen corresponding path program 14 times [2022-01-19 14:11:07,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:11:07,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974039890] [2022-01-19 14:11:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:11:07,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:11:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:11:07,324 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 14:11:07,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:11:07,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974039890] [2022-01-19 14:11:07,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974039890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:11:07,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001094524] [2022-01-19 14:11:07,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:11:07,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:11:07,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:11:07,326 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:11:07,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-19 14:11:07,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:11:07,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:11:07,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:11:07,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:11:07,530 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 14:11:07,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:11:07,689 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 14:11:07,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001094524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:11:07,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:11:07,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 14:11:07,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600738640] [2022-01-19 14:11:07,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:11:07,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:11:07,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:11:07,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:11:07,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:11:07,692 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:11:07,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1061 places, 6201 transitions, 199570 flow. Second operand has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:11:07,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:11:07,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:11:07,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:12:10,976 INFO L129 PetriNetUnfolder]: 11284/31567 cut-off events. [2022-01-19 14:12:10,976 INFO L130 PetriNetUnfolder]: For 1918870/1919002 co-relation queries the response was YES. [2022-01-19 14:12:13,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 358158 conditions, 31567 events. 11284/31567 cut-off events. For 1918870/1919002 co-relation queries the response was YES. Maximal size of possible extension queue 2363. Compared 407731 event pairs, 544 based on Foata normal form. 62/31473 useless extension candidates. Maximal degree in co-relation 357871. Up to 4617 conditions per place. [2022-01-19 14:12:13,482 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 1195 selfloop transitions, 6481 changer transitions 17/7747 dead transitions. [2022-01-19 14:12:13,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1193 places, 7747 transitions, 264029 flow [2022-01-19 14:12:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-19 14:12:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2022-01-19 14:12:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 8829 transitions. [2022-01-19 14:12:13,493 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7630282603059373 [2022-01-19 14:12:13,493 INFO L72 ComplementDD]: Start complementDD. Operand 133 states and 8829 transitions. [2022-01-19 14:12:13,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 133 states and 8829 transitions. [2022-01-19 14:12:13,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:12:13,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 133 states and 8829 transitions. [2022-01-19 14:12:13,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 134 states, 133 states have (on average 66.38345864661655) internal successors, (8829), 133 states have internal predecessors, (8829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:13,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 134 states, 134 states have (on average 87.0) internal successors, (11658), 134 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:13,509 INFO L81 ComplementDD]: Finished complementDD. Result has 134 states, 134 states have (on average 87.0) internal successors, (11658), 134 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:13,509 INFO L186 Difference]: Start difference. First operand has 1061 places, 6201 transitions, 199570 flow. Second operand 133 states and 8829 transitions. [2022-01-19 14:12:13,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1193 places, 7747 transitions, 264029 flow [2022-01-19 14:12:55,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1186 places, 7747 transitions, 262866 flow, removed 507 selfloop flow, removed 7 redundant places. [2022-01-19 14:12:55,748 INFO L242 Difference]: Finished difference. Result has 1234 places, 7553 transitions, 267750 flow [2022-01-19 14:12:55,752 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=198740, PETRI_DIFFERENCE_MINUEND_PLACES=1054, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=133, PETRI_FLOW=267750, PETRI_PLACES=1234, PETRI_TRANSITIONS=7553} [2022-01-19 14:12:55,753 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1157 predicate places. [2022-01-19 14:12:55,753 INFO L470 AbstractCegarLoop]: Abstraction has has 1234 places, 7553 transitions, 267750 flow [2022-01-19 14:12:55,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:55,753 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:12:55,753 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:12:55,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-19 14:12:55,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:12:55,967 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:12:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:12:55,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1234851806, now seen corresponding path program 15 times [2022-01-19 14:12:55,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:12:55,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230862963] [2022-01-19 14:12:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:12:55,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:12:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:12:56,053 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 14:12:56,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:12:56,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230862963] [2022-01-19 14:12:56,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230862963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:12:56,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293950751] [2022-01-19 14:12:56,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:12:56,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:12:56,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:12:56,055 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:12:56,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-19 14:12:56,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 14:12:56,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:12:56,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:12:56,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:12:56,251 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 14:12:56,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:12:56,411 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 14:12:56,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293950751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:12:56,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:12:56,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 14:12:56,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387738024] [2022-01-19 14:12:56,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:12:56,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 14:12:56,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:12:56,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 14:12:56,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-19 14:12:56,413 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:12:56,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1234 places, 7553 transitions, 267750 flow. Second operand has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:56,413 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:12:56,413 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:12:56,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:14:37,653 INFO L129 PetriNetUnfolder]: 12045/33597 cut-off events. [2022-01-19 14:14:37,653 INFO L130 PetriNetUnfolder]: For 2364947/2365051 co-relation queries the response was YES. [2022-01-19 14:14:40,239 INFO L84 FinitePrefix]: Finished finitePrefix Result has 411839 conditions, 33597 events. 12045/33597 cut-off events. For 2364947/2365051 co-relation queries the response was YES. Maximal size of possible extension queue 2478. Compared 437048 event pairs, 1157 based on Foata normal form. 80/33163 useless extension candidates. Maximal degree in co-relation 411504. Up to 7782 conditions per place. [2022-01-19 14:14:40,469 INFO L132 encePairwiseOnDemand]: 76/87 looper letters, 1659 selfloop transitions, 6612 changer transitions 3/8328 dead transitions. [2022-01-19 14:14:40,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1319 places, 8328 transitions, 308389 flow [2022-01-19 14:14:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-19 14:14:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-01-19 14:14:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 5713 transitions. [2022-01-19 14:14:40,473 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7635658914728682 [2022-01-19 14:14:40,473 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 5713 transitions. [2022-01-19 14:14:40,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 5713 transitions. [2022-01-19 14:14:40,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:14:40,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 5713 transitions. [2022-01-19 14:14:40,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 66.43023255813954) internal successors, (5713), 86 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:14:40,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 87.0) internal successors, (7569), 87 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:14:40,482 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 87.0) internal successors, (7569), 87 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:14:40,482 INFO L186 Difference]: Start difference. First operand has 1234 places, 7553 transitions, 267750 flow. Second operand 86 states and 5713 transitions. [2022-01-19 14:14:40,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1319 places, 8328 transitions, 308389 flow [2022-01-19 14:15:40,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1281 places, 8328 transitions, 306882 flow, removed 512 selfloop flow, removed 38 redundant places. [2022-01-19 14:15:40,441 INFO L242 Difference]: Finished difference. Result has 1320 places, 8180 transitions, 313056 flow [2022-01-19 14:15:40,446 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=266127, PETRI_DIFFERENCE_MINUEND_PLACES=1196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6002, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=313056, PETRI_PLACES=1320, PETRI_TRANSITIONS=8180} [2022-01-19 14:15:40,447 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1243 predicate places. [2022-01-19 14:15:40,447 INFO L470 AbstractCegarLoop]: Abstraction has has 1320 places, 8180 transitions, 313056 flow [2022-01-19 14:15:40,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:15:40,447 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:15:40,447 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:15:40,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-19 14:15:40,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:15:40,655 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:15:40,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:15:40,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2011559796, now seen corresponding path program 16 times [2022-01-19 14:15:40,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:15:40,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959909726] [2022-01-19 14:15:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:15:40,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:15:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:15:40,725 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 14:15:40,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:15:40,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959909726] [2022-01-19 14:15:40,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959909726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:15:40,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150864964] [2022-01-19 14:15:40,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:15:40,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:15:40,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:15:40,727 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:15:40,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-19 14:15:40,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:15:40,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:15:40,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:15:40,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:15:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:15:40,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:15:41,107 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 14:15:41,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150864964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:15:41,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:15:41,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-19 14:15:41,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419155676] [2022-01-19 14:15:41,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:15:41,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 14:15:41,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:15:41,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 14:15:41,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-01-19 14:15:41,109 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:15:41,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1320 places, 8180 transitions, 313056 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:15:41,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:15:41,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:15:41,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:17:20,408 INFO L129 PetriNetUnfolder]: 12071/33384 cut-off events. [2022-01-19 14:17:20,408 INFO L130 PetriNetUnfolder]: For 2712518/2712631 co-relation queries the response was YES. [2022-01-19 14:17:23,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 437774 conditions, 33384 events. 12071/33384 cut-off events. For 2712518/2712631 co-relation queries the response was YES. Maximal size of possible extension queue 2466. Compared 432206 event pairs, 1567 based on Foata normal form. 16/32699 useless extension candidates. Maximal degree in co-relation 437410. Up to 9770 conditions per place. [2022-01-19 14:17:23,520 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 4356 selfloop transitions, 3839 changer transitions 5/8254 dead transitions. [2022-01-19 14:17:23,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1352 places, 8254 transitions, 331718 flow [2022-01-19 14:17:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 14:17:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 14:17:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2230 transitions. [2022-01-19 14:17:23,522 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.776732845698363 [2022-01-19 14:17:23,522 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2230 transitions. [2022-01-19 14:17:23,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2230 transitions. [2022-01-19 14:17:23,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:17:23,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2230 transitions. [2022-01-19 14:17:23,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 67.57575757575758) internal successors, (2230), 33 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:17:23,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 87.0) internal successors, (2958), 34 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:17:23,525 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 87.0) internal successors, (2958), 34 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:17:23,525 INFO L186 Difference]: Start difference. First operand has 1320 places, 8180 transitions, 313056 flow. Second operand 33 states and 2230 transitions. [2022-01-19 14:17:23,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1352 places, 8254 transitions, 331718 flow [2022-01-19 14:18:46,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1335 places, 8254 transitions, 330970 flow, removed 206 selfloop flow, removed 17 redundant places. [2022-01-19 14:18:47,098 INFO L242 Difference]: Finished difference. Result has 1338 places, 8202 transitions, 321096 flow [2022-01-19 14:18:47,102 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=312314, PETRI_DIFFERENCE_MINUEND_PLACES=1303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3815, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=321096, PETRI_PLACES=1338, PETRI_TRANSITIONS=8202} [2022-01-19 14:18:47,103 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1261 predicate places. [2022-01-19 14:18:47,103 INFO L470 AbstractCegarLoop]: Abstraction has has 1338 places, 8202 transitions, 321096 flow [2022-01-19 14:18:47,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:18:47,103 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:18:47,103 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:18:47,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-19 14:18:47,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:18:47,321 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:18:47,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:18:47,321 INFO L85 PathProgramCache]: Analyzing trace with hash -257090374, now seen corresponding path program 17 times [2022-01-19 14:18:47,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:18:47,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429335158] [2022-01-19 14:18:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:18:47,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:18:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:18:47,404 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 14:18:47,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:18:47,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429335158] [2022-01-19 14:18:47,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429335158] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:18:47,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964285117] [2022-01-19 14:18:47,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:18:47,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:18:47,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:18:47,406 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:18:47,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-19 14:18:47,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 14:18:47,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:18:47,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 14:18:47,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:18:47,625 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 14:18:47,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:18:47,841 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 14:18:47,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964285117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:18:47,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:18:47,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-19 14:18:47,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459709657] [2022-01-19 14:18:47,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:18:47,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 14:18:47,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:18:47,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 14:18:47,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-19 14:18:47,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 14:18:47,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1338 places, 8202 transitions, 321096 flow. Second operand has 22 states, 22 states have (on average 65.13636363636364) internal successors, (1433), 22 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:18:47,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:18:47,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 14:18:47,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:21:02,060 INFO L129 PetriNetUnfolder]: 14068/39471 cut-off events. [2022-01-19 14:21:02,060 INFO L130 PetriNetUnfolder]: For 3165906/3165934 co-relation queries the response was YES. [2022-01-19 14:21:05,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 516442 conditions, 39471 events. 14068/39471 cut-off events. For 3165906/3165934 co-relation queries the response was YES. Maximal size of possible extension queue 2956. Compared 529350 event pairs, 2265 based on Foata normal form. 40/38803 useless extension candidates. Maximal degree in co-relation 516076. Up to 9837 conditions per place. [2022-01-19 14:21:05,727 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 4273 selfloop transitions, 5601 changer transitions 6/9934 dead transitions. [2022-01-19 14:21:05,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1409 places, 9934 transitions, 407462 flow [2022-01-19 14:21:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-19 14:21:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-01-19 14:21:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 5078 transitions. [2022-01-19 14:21:05,730 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7679975801572898 [2022-01-19 14:21:05,730 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 5078 transitions. [2022-01-19 14:21:05,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 5078 transitions. [2022-01-19 14:21:05,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:21:05,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 5078 transitions. [2022-01-19 14:21:05,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 66.8157894736842) internal successors, (5078), 76 states have internal predecessors, (5078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:21:05,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 87.0) internal successors, (6699), 77 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:21:05,737 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 87.0) internal successors, (6699), 77 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:21:05,737 INFO L186 Difference]: Start difference. First operand has 1338 places, 8202 transitions, 321096 flow. Second operand 76 states and 5078 transitions. [2022-01-19 14:21:05,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1409 places, 9934 transitions, 407462 flow Received shutdown request... [2022-01-19 14:21:06,139 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 14:21:06,142 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 14:21:06,158 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 14:21:06,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-19 14:21:06,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:21:06,359 WARN L594 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-01-19 14:21:06,361 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 14:21:06,361 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 14:21:06,364 INFO L732 BasicCegarLoop]: Path program histogram: [17, 4, 1, 1] [2022-01-19 14:21:06,365 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 14:21:06,365 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 14:21:06,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 02:21:06 BasicIcfg [2022-01-19 14:21:06,367 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 14:21:06,367 INFO L158 Benchmark]: Toolchain (without parser) took 819356.56ms. Allocated memory was 383.8MB in the beginning and 7.5GB in the end (delta: 7.1GB). Free memory was 330.4MB in the beginning and 4.7GB in the end (delta: -4.3GB). Peak memory consumption was 7.1GB. Max. memory is 16.0GB. [2022-01-19 14:21:06,367 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 383.8MB. Free memory was 346.5MB in the beginning and 346.5MB in the end (delta: 69.5kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 14:21:06,367 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.25ms. Allocated memory was 383.8MB in the beginning and 492.8MB in the end (delta: 109.1MB). Free memory was 330.2MB in the beginning and 466.3MB in the end (delta: -136.1MB). Peak memory consumption was 13.7MB. Max. memory is 16.0GB. [2022-01-19 14:21:06,367 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.39ms. Allocated memory is still 492.8MB. Free memory was 466.3MB in the beginning and 464.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 14:21:06,368 INFO L158 Benchmark]: Boogie Preprocessor took 15.71ms. Allocated memory is still 492.8MB. Free memory was 464.2MB in the beginning and 462.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 14:21:06,368 INFO L158 Benchmark]: RCFGBuilder took 255.05ms. Allocated memory is still 492.8MB. Free memory was 462.7MB in the beginning and 447.4MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-19 14:21:06,368 INFO L158 Benchmark]: TraceAbstraction took 818861.65ms. Allocated memory was 492.8MB in the beginning and 7.5GB in the end (delta: 7.0GB). Free memory was 447.4MB in the beginning and 4.7GB in the end (delta: -4.2GB). Peak memory consumption was 7.1GB. Max. memory is 16.0GB. [2022-01-19 14:21:06,369 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 383.8MB. Free memory was 346.5MB in the beginning and 346.5MB in the end (delta: 69.5kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 198.25ms. Allocated memory was 383.8MB in the beginning and 492.8MB in the end (delta: 109.1MB). Free memory was 330.2MB in the beginning and 466.3MB in the end (delta: -136.1MB). Peak memory consumption was 13.7MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 20.39ms. Allocated memory is still 492.8MB. Free memory was 466.3MB in the beginning and 464.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 15.71ms. Allocated memory is still 492.8MB. Free memory was 464.2MB in the beginning and 462.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 255.05ms. Allocated memory is still 492.8MB. Free memory was 462.7MB in the beginning and 447.4MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 818861.65ms. Allocated memory was 492.8MB in the beginning and 7.5GB in the end (delta: 7.0GB). Free memory was 447.4MB in the beginning and 4.7GB in the end (delta: -4.2GB). Peak memory consumption was 7.1GB. 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: 76]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 102 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 818.7s, OverallIterations: 23, TraceHistogramMax: 2, PathProgramHistogramMax: 17, EmptinessCheckTime: 0.0s, AutomataDifference: 805.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4633 SdHoareTripleChecker+Valid, 8.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4633 mSDsluCounter, 3309 SdHoareTripleChecker+Invalid, 6.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5142 mSDsCounter, 988 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12456 IncrementalHoareTripleChecker+Invalid, 13444 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 988 mSolverCounterUnsat, 537 mSDtfsCounter, 12456 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4041 GetRequests, 2652 SyntacticMatches, 28 SemanticMatches, 1361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44419 ImplicationChecksByTransitivity, 21.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=321096occurred in iteration=22, InterpolantAutomatonStates: 1181, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 7.5s InterpolantComputationTime, 3050 NumberOfCodeBlocks, 2886 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 4389 ConstructedInterpolants, 0 QuantifiedInterpolants, 13805 SizeOfPredicates, 142 NumberOfNonLiveVariables, 2798 ConjunctsInSsa, 246 ConjunctsInUnsatCore, 61 InterpolantComputations, 5 PerfectInterpolantSequences, 272/398 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown