/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 01:45:10,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 01:45:10,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 01:45:10,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 01:45:10,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 01:45:10,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 01:45:10,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 01:45:10,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 01:45:10,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 01:45:10,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 01:45:10,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 01:45:10,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 01:45:10,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 01:45:10,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 01:45:10,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 01:45:10,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 01:45:10,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 01:45:10,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 01:45:10,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 01:45:10,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 01:45:10,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 01:45:10,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 01:45:10,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 01:45:10,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 01:45:10,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 01:45:10,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 01:45:10,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 01:45:10,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 01:45:10,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 01:45:10,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 01:45:10,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 01:45:10,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 01:45:10,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 01:45:10,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 01:45:10,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 01:45:10,110 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 01:45:10,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 01:45:10,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 01:45:10,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 01:45:10,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 01:45:10,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 01:45:10,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-01-19 01:45:10,137 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 01:45:10,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 01:45:10,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 01:45:10,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 01:45:10,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 01:45:10,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 01:45:10,139 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 01:45:10,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 01:45:10,139 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 01:45:10,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 01:45:10,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 01:45:10,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 01:45:10,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 01:45:10,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 01:45:10,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 01:45:10,140 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 01:45:10,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 01:45:10,140 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 01:45:10,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 01:45:10,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 01:45:10,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 01:45:10,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 01:45:10,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 01:45:10,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 01:45:10,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 01:45:10,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 01:45:10,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 01:45:10,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 01:45:10,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 01:45:10,142 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 01:45:10,142 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 01:45:10,142 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 01:45:10,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 01:45:10,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 01:45:10,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 01:45:10,302 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 01:45:10,302 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 01:45:10,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2022-01-19 01:45:10,360 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42b90d8e5/e08a9ca1bd1f41219ccf65c7e9e354ab/FLAG782fc4d93 [2022-01-19 01:45:10,701 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 01:45:10,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2022-01-19 01:45:10,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42b90d8e5/e08a9ca1bd1f41219ccf65c7e9e354ab/FLAG782fc4d93 [2022-01-19 01:45:10,719 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42b90d8e5/e08a9ca1bd1f41219ccf65c7e9e354ab [2022-01-19 01:45:10,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 01:45:10,722 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 01:45:10,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 01:45:10,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 01:45:10,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 01:45:10,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:45:10" (1/1) ... [2022-01-19 01:45:10,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@449359a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:10, skipping insertion in model container [2022-01-19 01:45:10,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:45:10" (1/1) ... [2022-01-19 01:45:10,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 01:45:10,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 01:45:10,887 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-figure1-alt.wvr.c[2087,2100] [2022-01-19 01:45:10,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 01:45:10,894 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 01:45:10,920 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-figure1-alt.wvr.c[2087,2100] [2022-01-19 01:45:10,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 01:45:10,931 INFO L208 MainTranslator]: Completed translation [2022-01-19 01:45:10,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:10 WrapperNode [2022-01-19 01:45:10,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 01:45:10,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 01:45:10,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 01:45:10,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 01:45:10,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:10" (1/1) ... [2022-01-19 01:45:10,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:10" (1/1) ... [2022-01-19 01:45:10,957 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2022-01-19 01:45:10,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 01:45:10,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 01:45:10,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 01:45:10,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 01:45:10,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:10" (1/1) ... [2022-01-19 01:45:10,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:10" (1/1) ... [2022-01-19 01:45:10,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:10" (1/1) ... [2022-01-19 01:45:10,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:10" (1/1) ... [2022-01-19 01:45:10,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:10" (1/1) ... [2022-01-19 01:45:10,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:10" (1/1) ... [2022-01-19 01:45:10,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:10" (1/1) ... [2022-01-19 01:45:10,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 01:45:10,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 01:45:10,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 01:45:10,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 01:45:10,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:10" (1/1) ... [2022-01-19 01:45:10,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 01:45:10,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:11,007 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 01:45:11,014 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 01:45:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 01:45:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 01:45:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 01:45:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 01:45:11,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 01:45:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 01:45:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 01:45:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 01:45:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 01:45:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 01:45:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 01:45:11,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 01:45:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 01:45:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 01:45:11,033 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 01:45:11,092 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 01:45:11,093 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 01:45:11,208 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 01:45:11,233 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 01:45:11,233 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 01:45:11,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:45:11 BoogieIcfgContainer [2022-01-19 01:45:11,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 01:45:11,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 01:45:11,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 01:45:11,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 01:45:11,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 01:45:10" (1/3) ... [2022-01-19 01:45:11,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156ca766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:45:11, skipping insertion in model container [2022-01-19 01:45:11,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:10" (2/3) ... [2022-01-19 01:45:11,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156ca766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:45:11, skipping insertion in model container [2022-01-19 01:45:11,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:45:11" (3/3) ... [2022-01-19 01:45:11,240 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2022-01-19 01:45:11,243 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 01:45:11,243 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 01:45:11,243 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 01:45:11,268 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,268 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,268 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,269 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,269 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,269 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,271 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,271 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,271 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,271 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,271 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,271 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,272 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,272 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,272 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,272 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,272 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,272 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,273 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,273 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,273 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,273 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,274 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,274 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,274 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,274 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,274 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,274 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,281 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,281 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,281 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,281 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,281 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,281 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,281 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,282 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,283 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,283 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,283 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,283 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:11,286 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 01:45:11,316 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 01:45:11,320 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 01:45:11,321 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 01:45:11,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2022-01-19 01:45:11,357 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2022-01-19 01:45:11,357 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 01:45:11,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-01-19 01:45:11,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2022-01-19 01:45:11,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2022-01-19 01:45:11,379 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2022-01-19 01:45:11,379 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 01:45:11,380 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:11,380 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:11,380 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:11,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1515800342, now seen corresponding path program 1 times [2022-01-19 01:45:11,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:11,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506573249] [2022-01-19 01:45:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:11,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:11,563 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 01:45:11,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:11,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506573249] [2022-01-19 01:45:11,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506573249] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:45:11,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:45:11,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 01:45:11,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972409355] [2022-01-19 01:45:11,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:45:11,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 01:45:11,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:11,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 01:45:11,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 01:45:11,613 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 89 [2022-01-19 01:45:11,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:11,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:11,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 89 [2022-01-19 01:45:11,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:11,678 INFO L129 PetriNetUnfolder]: 11/107 cut-off events. [2022-01-19 01:45:11,678 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-01-19 01:45:11,679 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 107 events. 11/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 3 based on Foata normal form. 11/109 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2022-01-19 01:45:11,681 INFO L132 encePairwiseOnDemand]: 85/89 looper letters, 6 selfloop transitions, 0 changer transitions 2/74 dead transitions. [2022-01-19 01:45:11,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 172 flow [2022-01-19 01:45:11,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 01:45:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 01:45:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2022-01-19 01:45:11,693 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9325842696629213 [2022-01-19 01:45:11,693 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2022-01-19 01:45:11,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2022-01-19 01:45:11,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:11,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2022-01-19 01:45:11,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:11,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:11,701 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:11,702 INFO L186 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 2 states and 166 transitions. [2022-01-19 01:45:11,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 172 flow [2022-01-19 01:45:11,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 01:45:11,707 INFO L242 Difference]: Finished difference. Result has 76 places, 72 transitions, 148 flow [2022-01-19 01:45:11,708 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2022-01-19 01:45:11,710 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2022-01-19 01:45:11,710 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 148 flow [2022-01-19 01:45:11,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:11,711 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:11,711 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:11,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 01:45:11,711 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:11,712 INFO L85 PathProgramCache]: Analyzing trace with hash -79113043, now seen corresponding path program 1 times [2022-01-19 01:45:11,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:11,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113624175] [2022-01-19 01:45:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:11,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:12,153 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 01:45:12,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:12,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113624175] [2022-01-19 01:45:12,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113624175] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:45:12,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:45:12,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-19 01:45:12,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572652800] [2022-01-19 01:45:12,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:45:12,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 01:45:12,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:12,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 01:45:12,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-19 01:45:12,157 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-01-19 01:45:12,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:12,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:12,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-01-19 01:45:12,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:12,518 INFO L129 PetriNetUnfolder]: 67/248 cut-off events. [2022-01-19 01:45:12,518 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-01-19 01:45:12,520 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 248 events. 67/248 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 955 event pairs, 34 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 417. Up to 102 conditions per place. [2022-01-19 01:45:12,522 INFO L132 encePairwiseOnDemand]: 76/89 looper letters, 43 selfloop transitions, 11 changer transitions 6/103 dead transitions. [2022-01-19 01:45:12,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 337 flow [2022-01-19 01:45:12,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 01:45:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 01:45:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 698 transitions. [2022-01-19 01:45:12,528 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653558052434457 [2022-01-19 01:45:12,528 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 698 transitions. [2022-01-19 01:45:12,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 698 transitions. [2022-01-19 01:45:12,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:12,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 698 transitions. [2022-01-19 01:45:12,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.166666666666664) internal successors, (698), 12 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:12,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:12,533 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:12,533 INFO L186 Difference]: Start difference. First operand has 76 places, 72 transitions, 148 flow. Second operand 12 states and 698 transitions. [2022-01-19 01:45:12,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 337 flow [2022-01-19 01:45:12,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 01:45:12,535 INFO L242 Difference]: Finished difference. Result has 92 places, 79 transitions, 213 flow [2022-01-19 01:45:12,535 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2022-01-19 01:45:12,536 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2022-01-19 01:45:12,536 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 213 flow [2022-01-19 01:45:12,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:12,536 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:12,537 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:12,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 01:45:12,537 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:12,537 INFO L85 PathProgramCache]: Analyzing trace with hash -42932599, now seen corresponding path program 2 times [2022-01-19 01:45:12,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:12,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642381983] [2022-01-19 01:45:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:12,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:12,833 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 01:45:12,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:12,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642381983] [2022-01-19 01:45:12,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642381983] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:45:12,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:45:12,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-19 01:45:12,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600198263] [2022-01-19 01:45:12,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:45:12,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 01:45:12,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:12,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 01:45:12,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-19 01:45:12,839 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-01-19 01:45:12,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:12,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:12,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-01-19 01:45:12,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:13,101 INFO L129 PetriNetUnfolder]: 68/264 cut-off events. [2022-01-19 01:45:13,101 INFO L130 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-01-19 01:45:13,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 264 events. 68/264 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1119 event pairs, 36 based on Foata normal form. 1/262 useless extension candidates. Maximal degree in co-relation 531. Up to 102 conditions per place. [2022-01-19 01:45:13,103 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 40 selfloop transitions, 11 changer transitions 11/105 dead transitions. [2022-01-19 01:45:13,103 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 429 flow [2022-01-19 01:45:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 01:45:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 01:45:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2022-01-19 01:45:13,105 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.650749063670412 [2022-01-19 01:45:13,105 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2022-01-19 01:45:13,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2022-01-19 01:45:13,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:13,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2022-01-19 01:45:13,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:13,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:13,108 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:13,108 INFO L186 Difference]: Start difference. First operand has 92 places, 79 transitions, 213 flow. Second operand 12 states and 695 transitions. [2022-01-19 01:45:13,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 429 flow [2022-01-19 01:45:13,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 105 transitions, 407 flow, removed 8 selfloop flow, removed 6 redundant places. [2022-01-19 01:45:13,111 INFO L242 Difference]: Finished difference. Result has 100 places, 80 transitions, 247 flow [2022-01-19 01:45:13,112 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=247, PETRI_PLACES=100, PETRI_TRANSITIONS=80} [2022-01-19 01:45:13,112 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 21 predicate places. [2022-01-19 01:45:13,112 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 80 transitions, 247 flow [2022-01-19 01:45:13,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:13,113 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:13,113 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:13,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 01:45:13,113 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:13,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1623942775, now seen corresponding path program 3 times [2022-01-19 01:45:13,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:13,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002708152] [2022-01-19 01:45:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:13,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:13,408 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 01:45:13,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:13,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002708152] [2022-01-19 01:45:13,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002708152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:45:13,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:45:13,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-19 01:45:13,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355992385] [2022-01-19 01:45:13,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:45:13,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 01:45:13,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:13,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 01:45:13,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-19 01:45:13,411 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-01-19 01:45:13,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 80 transitions, 247 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:13,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:13,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-01-19 01:45:13,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:13,715 INFO L129 PetriNetUnfolder]: 72/299 cut-off events. [2022-01-19 01:45:13,716 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-01-19 01:45:13,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 299 events. 72/299 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1369 event pairs, 41 based on Foata normal form. 1/295 useless extension candidates. Maximal degree in co-relation 655. Up to 105 conditions per place. [2022-01-19 01:45:13,718 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 8/113 dead transitions. [2022-01-19 01:45:13,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 519 flow [2022-01-19 01:45:13,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 01:45:13,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 01:45:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 704 transitions. [2022-01-19 01:45:13,720 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6591760299625468 [2022-01-19 01:45:13,720 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 704 transitions. [2022-01-19 01:45:13,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 704 transitions. [2022-01-19 01:45:13,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:13,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 704 transitions. [2022-01-19 01:45:13,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.666666666666664) internal successors, (704), 12 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:13,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:13,723 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:13,723 INFO L186 Difference]: Start difference. First operand has 100 places, 80 transitions, 247 flow. Second operand 12 states and 704 transitions. [2022-01-19 01:45:13,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 519 flow [2022-01-19 01:45:13,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 113 transitions, 474 flow, removed 14 selfloop flow, removed 9 redundant places. [2022-01-19 01:45:13,730 INFO L242 Difference]: Finished difference. Result has 104 places, 84 transitions, 301 flow [2022-01-19 01:45:13,730 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=301, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2022-01-19 01:45:13,731 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2022-01-19 01:45:13,732 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 301 flow [2022-01-19 01:45:13,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:13,732 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:13,732 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:13,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 01:45:13,733 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:13,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:13,733 INFO L85 PathProgramCache]: Analyzing trace with hash -211036747, now seen corresponding path program 4 times [2022-01-19 01:45:13,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:13,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615089273] [2022-01-19 01:45:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:13,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:14,031 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 01:45:14,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:14,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615089273] [2022-01-19 01:45:14,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615089273] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:45:14,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:45:14,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-19 01:45:14,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807145799] [2022-01-19 01:45:14,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:45:14,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 01:45:14,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:14,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 01:45:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-19 01:45:14,034 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-01-19 01:45:14,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 301 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:14,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:14,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-01-19 01:45:14,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:14,318 INFO L129 PetriNetUnfolder]: 71/291 cut-off events. [2022-01-19 01:45:14,318 INFO L130 PetriNetUnfolder]: For 218/218 co-relation queries the response was YES. [2022-01-19 01:45:14,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 291 events. 71/291 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1313 event pairs, 34 based on Foata normal form. 1/286 useless extension candidates. Maximal degree in co-relation 664. Up to 105 conditions per place. [2022-01-19 01:45:14,320 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 50 selfloop transitions, 15 changer transitions 6/114 dead transitions. [2022-01-19 01:45:14,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 114 transitions, 559 flow [2022-01-19 01:45:14,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 01:45:14,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 01:45:14,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 703 transitions. [2022-01-19 01:45:14,322 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6582397003745318 [2022-01-19 01:45:14,322 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 703 transitions. [2022-01-19 01:45:14,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 703 transitions. [2022-01-19 01:45:14,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:14,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 703 transitions. [2022-01-19 01:45:14,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.583333333333336) internal successors, (703), 12 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:14,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:14,325 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:14,325 INFO L186 Difference]: Start difference. First operand has 104 places, 84 transitions, 301 flow. Second operand 12 states and 703 transitions. [2022-01-19 01:45:14,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 114 transitions, 559 flow [2022-01-19 01:45:14,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 520 flow, removed 11 selfloop flow, removed 8 redundant places. [2022-01-19 01:45:14,328 INFO L242 Difference]: Finished difference. Result has 110 places, 86 transitions, 352 flow [2022-01-19 01:45:14,328 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=352, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2022-01-19 01:45:14,329 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 31 predicate places. [2022-01-19 01:45:14,329 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 352 flow [2022-01-19 01:45:14,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:14,329 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:14,329 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:14,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 01:45:14,330 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:14,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:14,330 INFO L85 PathProgramCache]: Analyzing trace with hash -773440099, now seen corresponding path program 5 times [2022-01-19 01:45:14,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:14,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883882026] [2022-01-19 01:45:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:14,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:14,557 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 01:45:14,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:14,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883882026] [2022-01-19 01:45:14,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883882026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:45:14,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:45:14,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-19 01:45:14,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682642132] [2022-01-19 01:45:14,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:45:14,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 01:45:14,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:14,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 01:45:14,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-19 01:45:14,559 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-01-19 01:45:14,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 352 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:14,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:14,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-01-19 01:45:14,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:14,810 INFO L129 PetriNetUnfolder]: 71/283 cut-off events. [2022-01-19 01:45:14,810 INFO L130 PetriNetUnfolder]: For 320/332 co-relation queries the response was YES. [2022-01-19 01:45:14,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 283 events. 71/283 cut-off events. For 320/332 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1260 event pairs, 34 based on Foata normal form. 4/282 useless extension candidates. Maximal degree in co-relation 676. Up to 105 conditions per place. [2022-01-19 01:45:14,811 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 14 changer transitions 9/108 dead transitions. [2022-01-19 01:45:14,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 563 flow [2022-01-19 01:45:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 01:45:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 01:45:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2022-01-19 01:45:14,829 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2022-01-19 01:45:14,829 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2022-01-19 01:45:14,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2022-01-19 01:45:14,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:14,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2022-01-19 01:45:14,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 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 01:45:14,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:14,831 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:14,832 INFO L186 Difference]: Start difference. First operand has 110 places, 86 transitions, 352 flow. Second operand 12 states and 696 transitions. [2022-01-19 01:45:14,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 563 flow [2022-01-19 01:45:14,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 526 flow, removed 10 selfloop flow, removed 8 redundant places. [2022-01-19 01:45:14,835 INFO L242 Difference]: Finished difference. Result has 115 places, 86 transitions, 368 flow [2022-01-19 01:45:14,835 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=368, PETRI_PLACES=115, PETRI_TRANSITIONS=86} [2022-01-19 01:45:14,835 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 36 predicate places. [2022-01-19 01:45:14,836 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 86 transitions, 368 flow [2022-01-19 01:45:14,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:14,836 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:14,836 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:14,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 01:45:14,836 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:14,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:14,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1009642839, now seen corresponding path program 6 times [2022-01-19 01:45:14,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:14,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459610165] [2022-01-19 01:45:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:14,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:15,098 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 01:45:15,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:15,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459610165] [2022-01-19 01:45:15,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459610165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:45:15,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:45:15,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-19 01:45:15,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821158390] [2022-01-19 01:45:15,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:45:15,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 01:45:15,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 01:45:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-01-19 01:45:15,102 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-01-19 01:45:15,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 86 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:15,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:15,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-01-19 01:45:15,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:15,367 INFO L129 PetriNetUnfolder]: 68/248 cut-off events. [2022-01-19 01:45:15,367 INFO L130 PetriNetUnfolder]: For 320/320 co-relation queries the response was YES. [2022-01-19 01:45:15,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 248 events. 68/248 cut-off events. For 320/320 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 972 event pairs, 34 based on Foata normal form. 1/244 useless extension candidates. Maximal degree in co-relation 618. Up to 105 conditions per place. [2022-01-19 01:45:15,369 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 14 changer transitions 11/102 dead transitions. [2022-01-19 01:45:15,369 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 102 transitions, 547 flow [2022-01-19 01:45:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 01:45:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 01:45:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 690 transitions. [2022-01-19 01:45:15,371 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6460674157303371 [2022-01-19 01:45:15,371 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 690 transitions. [2022-01-19 01:45:15,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 690 transitions. [2022-01-19 01:45:15,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:15,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 690 transitions. [2022-01-19 01:45:15,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.5) internal successors, (690), 12 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:15,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:15,374 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:15,374 INFO L186 Difference]: Start difference. First operand has 115 places, 86 transitions, 368 flow. Second operand 12 states and 690 transitions. [2022-01-19 01:45:15,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 102 transitions, 547 flow [2022-01-19 01:45:15,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 499 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-01-19 01:45:15,378 INFO L242 Difference]: Finished difference. Result has 114 places, 85 transitions, 350 flow [2022-01-19 01:45:15,378 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=114, PETRI_TRANSITIONS=85} [2022-01-19 01:45:15,379 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 35 predicate places. [2022-01-19 01:45:15,379 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 85 transitions, 350 flow [2022-01-19 01:45:15,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:15,379 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:15,379 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:15,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 01:45:15,379 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:15,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:15,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1492579821, now seen corresponding path program 1 times [2022-01-19 01:45:15,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:15,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696972649] [2022-01-19 01:45:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:15,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:15,591 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 01:45:15,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:15,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696972649] [2022-01-19 01:45:15,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696972649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:15,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824754986] [2022-01-19 01:45:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:15,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:15,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:15,594 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 01:45:15,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 01:45:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:15,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:45:15,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:16,276 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 01:45:16,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:16,824 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 01:45:16,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824754986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:16,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:16,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 01:45:16,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353992111] [2022-01-19 01:45:16,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:16,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 01:45:16,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:16,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 01:45:16,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 01:45:16,828 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:45:16,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 85 transitions, 350 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:16,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:16,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:45:16,829 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:18,356 INFO L129 PetriNetUnfolder]: 168/592 cut-off events. [2022-01-19 01:45:18,356 INFO L130 PetriNetUnfolder]: For 377/377 co-relation queries the response was YES. [2022-01-19 01:45:18,357 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1318 conditions, 592 events. 168/592 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3253 event pairs, 9 based on Foata normal form. 13/605 useless extension candidates. Maximal degree in co-relation 1297. Up to 111 conditions per place. [2022-01-19 01:45:18,360 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 114 selfloop transitions, 82 changer transitions 13/251 dead transitions. [2022-01-19 01:45:18,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 251 transitions, 1334 flow [2022-01-19 01:45:18,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-19 01:45:18,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-01-19 01:45:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2702 transitions. [2022-01-19 01:45:18,364 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6324906367041199 [2022-01-19 01:45:18,365 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2702 transitions. [2022-01-19 01:45:18,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2702 transitions. [2022-01-19 01:45:18,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:18,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2702 transitions. [2022-01-19 01:45:18,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 56.291666666666664) internal successors, (2702), 48 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:18,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:18,375 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:18,375 INFO L186 Difference]: Start difference. First operand has 114 places, 85 transitions, 350 flow. Second operand 48 states and 2702 transitions. [2022-01-19 01:45:18,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 251 transitions, 1334 flow [2022-01-19 01:45:18,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 251 transitions, 1228 flow, removed 24 selfloop flow, removed 16 redundant places. [2022-01-19 01:45:18,380 INFO L242 Difference]: Finished difference. Result has 152 places, 152 transitions, 752 flow [2022-01-19 01:45:18,380 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=752, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2022-01-19 01:45:18,381 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 73 predicate places. [2022-01-19 01:45:18,381 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 752 flow [2022-01-19 01:45:18,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:18,382 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:18,382 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:18,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-19 01:45:18,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:18,599 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:18,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:18,599 INFO L85 PathProgramCache]: Analyzing trace with hash 330352477, now seen corresponding path program 2 times [2022-01-19 01:45:18,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:18,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126281623] [2022-01-19 01:45:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:18,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:18,830 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 01:45:18,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:18,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126281623] [2022-01-19 01:45:18,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126281623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:18,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179747641] [2022-01-19 01:45:18,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:45:18,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:18,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:18,832 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 01:45:18,833 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 01:45:18,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:45:18,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:18,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:45:18,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:19,383 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 01:45:19,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:19,916 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 01:45:19,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179747641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:19,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:19,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 01:45:19,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066722570] [2022-01-19 01:45:19,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:19,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 01:45:19,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:19,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 01:45:19,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 01:45:19,920 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:45:19,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 752 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:19,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:19,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:45:19,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:21,060 INFO L129 PetriNetUnfolder]: 210/752 cut-off events. [2022-01-19 01:45:21,060 INFO L130 PetriNetUnfolder]: For 677/677 co-relation queries the response was YES. [2022-01-19 01:45:21,062 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2086 conditions, 752 events. 210/752 cut-off events. For 677/677 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4583 event pairs, 22 based on Foata normal form. 1/751 useless extension candidates. Maximal degree in co-relation 2061. Up to 213 conditions per place. [2022-01-19 01:45:21,065 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 100 selfloop transitions, 122 changer transitions 6/270 dead transitions. [2022-01-19 01:45:21,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 270 transitions, 1798 flow [2022-01-19 01:45:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 01:45:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 01:45:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2186 transitions. [2022-01-19 01:45:21,068 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6297896859694613 [2022-01-19 01:45:21,068 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2186 transitions. [2022-01-19 01:45:21,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2186 transitions. [2022-01-19 01:45:21,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:21,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2186 transitions. [2022-01-19 01:45:21,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.05128205128205) internal successors, (2186), 39 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:21,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:21,074 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:21,074 INFO L186 Difference]: Start difference. First operand has 152 places, 152 transitions, 752 flow. Second operand 39 states and 2186 transitions. [2022-01-19 01:45:21,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 270 transitions, 1798 flow [2022-01-19 01:45:21,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 270 transitions, 1645 flow, removed 61 selfloop flow, removed 9 redundant places. [2022-01-19 01:45:21,082 INFO L242 Difference]: Finished difference. Result has 186 places, 205 transitions, 1291 flow [2022-01-19 01:45:21,082 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1291, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2022-01-19 01:45:21,082 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 107 predicate places. [2022-01-19 01:45:21,082 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 1291 flow [2022-01-19 01:45:21,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:21,083 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:21,083 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:21,103 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 01:45:21,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-19 01:45:21,299 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:21,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:21,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1508892007, now seen corresponding path program 3 times [2022-01-19 01:45:21,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:21,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242587302] [2022-01-19 01:45:21,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:21,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:21,510 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 01:45:21,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:21,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242587302] [2022-01-19 01:45:21,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242587302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:21,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144374753] [2022-01-19 01:45:21,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:45:21,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:21,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:21,512 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 01:45:21,513 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 01:45:21,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 01:45:21,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:21,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:45:21,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:22,081 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 01:45:22,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:45:22,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144374753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:22,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:22,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 01:45:22,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237057496] [2022-01-19 01:45:22,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:22,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 01:45:22,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:22,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 01:45:22,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 01:45:22,599 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:45:22,600 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 1291 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:22,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:22,600 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:45:22,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:25,994 INFO L129 PetriNetUnfolder]: 280/1042 cut-off events. [2022-01-19 01:45:25,994 INFO L130 PetriNetUnfolder]: For 1438/1440 co-relation queries the response was YES. [2022-01-19 01:45:25,998 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3193 conditions, 1042 events. 280/1042 cut-off events. For 1438/1440 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7246 event pairs, 21 based on Foata normal form. 3/1033 useless extension candidates. Maximal degree in co-relation 3162. Up to 147 conditions per place. [2022-01-19 01:45:26,001 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 158 selfloop transitions, 208 changer transitions 6/414 dead transitions. [2022-01-19 01:45:26,001 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 414 transitions, 3181 flow [2022-01-19 01:45:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-19 01:45:26,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-01-19 01:45:26,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4518 transitions. [2022-01-19 01:45:26,007 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6267166042446941 [2022-01-19 01:45:26,007 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4518 transitions. [2022-01-19 01:45:26,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4518 transitions. [2022-01-19 01:45:26,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:26,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4518 transitions. [2022-01-19 01:45:26,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.77777777777778) internal successors, (4518), 81 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:26,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:26,020 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:26,021 INFO L186 Difference]: Start difference. First operand has 186 places, 205 transitions, 1291 flow. Second operand 81 states and 4518 transitions. [2022-01-19 01:45:26,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 414 transitions, 3181 flow [2022-01-19 01:45:26,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 414 transitions, 3132 flow, removed 18 selfloop flow, removed 8 redundant places. [2022-01-19 01:45:26,033 INFO L242 Difference]: Finished difference. Result has 271 places, 286 transitions, 2375 flow [2022-01-19 01:45:26,034 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2375, PETRI_PLACES=271, PETRI_TRANSITIONS=286} [2022-01-19 01:45:26,034 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 192 predicate places. [2022-01-19 01:45:26,034 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 286 transitions, 2375 flow [2022-01-19 01:45:26,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:26,035 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:26,035 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:26,053 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 01:45:26,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:26,253 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:26,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:26,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1951911381, now seen corresponding path program 4 times [2022-01-19 01:45:26,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:26,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411467237] [2022-01-19 01:45:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:26,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:26,431 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 01:45:26,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:26,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411467237] [2022-01-19 01:45:26,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411467237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:26,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933475674] [2022-01-19 01:45:26,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 01:45:26,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:26,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:26,432 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 01:45:26,433 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 01:45:26,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 01:45:26,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:26,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:45:26,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:26,991 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 01:45:26,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:27,487 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 01:45:27,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933475674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:27,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:27,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 01:45:27,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125148770] [2022-01-19 01:45:27,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:27,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 01:45:27,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:27,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 01:45:27,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 01:45:27,491 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:45:27,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 286 transitions, 2375 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:27,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:27,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:45:27,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:30,474 INFO L129 PetriNetUnfolder]: 299/1078 cut-off events. [2022-01-19 01:45:30,474 INFO L130 PetriNetUnfolder]: For 4304/4306 co-relation queries the response was YES. [2022-01-19 01:45:30,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4343 conditions, 1078 events. 299/1078 cut-off events. For 4304/4306 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7557 event pairs, 19 based on Foata normal form. 3/1070 useless extension candidates. Maximal degree in co-relation 4298. Up to 157 conditions per place. [2022-01-19 01:45:30,482 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 165 selfloop transitions, 232 changer transitions 6/445 dead transitions. [2022-01-19 01:45:30,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 445 transitions, 4361 flow [2022-01-19 01:45:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-19 01:45:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-01-19 01:45:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4528 transitions. [2022-01-19 01:45:30,486 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6281037591899015 [2022-01-19 01:45:30,486 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4528 transitions. [2022-01-19 01:45:30,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4528 transitions. [2022-01-19 01:45:30,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:30,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4528 transitions. [2022-01-19 01:45:30,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.901234567901234) internal successors, (4528), 81 states have internal predecessors, (4528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:30,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:30,500 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:30,500 INFO L186 Difference]: Start difference. First operand has 271 places, 286 transitions, 2375 flow. Second operand 81 states and 4528 transitions. [2022-01-19 01:45:30,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 445 transitions, 4361 flow [2022-01-19 01:45:30,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 445 transitions, 4098 flow, removed 74 selfloop flow, removed 19 redundant places. [2022-01-19 01:45:30,520 INFO L242 Difference]: Finished difference. Result has 337 places, 319 transitions, 3031 flow [2022-01-19 01:45:30,521 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=3031, PETRI_PLACES=337, PETRI_TRANSITIONS=319} [2022-01-19 01:45:30,521 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 258 predicate places. [2022-01-19 01:45:30,521 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 319 transitions, 3031 flow [2022-01-19 01:45:30,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:30,522 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:30,522 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:30,539 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 01:45:30,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:30,739 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:30,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:30,739 INFO L85 PathProgramCache]: Analyzing trace with hash 692524227, now seen corresponding path program 5 times [2022-01-19 01:45:30,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:30,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976083635] [2022-01-19 01:45:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:30,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:30,984 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 01:45:30,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:30,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976083635] [2022-01-19 01:45:30,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976083635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:30,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217091216] [2022-01-19 01:45:30,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 01:45:30,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:30,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:30,986 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 01:45:30,986 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 01:45:31,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:45:31,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:31,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:45:31,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:31,480 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 01:45:31,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:31,899 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 01:45:31,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217091216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:31,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:31,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-01-19 01:45:31,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423020645] [2022-01-19 01:45:31,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:31,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-19 01:45:31,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:31,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-19 01:45:31,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-01-19 01:45:31,908 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:45:31,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 319 transitions, 3031 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:31,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:31,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:45:31,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:33,326 INFO L129 PetriNetUnfolder]: 406/1402 cut-off events. [2022-01-19 01:45:33,326 INFO L130 PetriNetUnfolder]: For 8752/8752 co-relation queries the response was YES. [2022-01-19 01:45:33,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6431 conditions, 1402 events. 406/1402 cut-off events. For 8752/8752 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10528 event pairs, 22 based on Foata normal form. 1/1397 useless extension candidates. Maximal degree in co-relation 6377. Up to 392 conditions per place. [2022-01-19 01:45:33,339 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 170 selfloop transitions, 249 changer transitions 6/467 dead transitions. [2022-01-19 01:45:33,340 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 467 transitions, 5413 flow [2022-01-19 01:45:33,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 01:45:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 01:45:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2185 transitions. [2022-01-19 01:45:33,342 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6295015845577643 [2022-01-19 01:45:33,342 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2185 transitions. [2022-01-19 01:45:33,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2185 transitions. [2022-01-19 01:45:33,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:33,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2185 transitions. [2022-01-19 01:45:33,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.02564102564103) internal successors, (2185), 39 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:33,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:33,348 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:33,348 INFO L186 Difference]: Start difference. First operand has 337 places, 319 transitions, 3031 flow. Second operand 39 states and 2185 transitions. [2022-01-19 01:45:33,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 467 transitions, 5413 flow [2022-01-19 01:45:33,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 467 transitions, 4816 flow, removed 97 selfloop flow, removed 56 redundant places. [2022-01-19 01:45:33,383 INFO L242 Difference]: Finished difference. Result has 326 places, 396 transitions, 4281 flow [2022-01-19 01:45:33,383 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2620, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4281, PETRI_PLACES=326, PETRI_TRANSITIONS=396} [2022-01-19 01:45:33,384 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 247 predicate places. [2022-01-19 01:45:33,384 INFO L470 AbstractCegarLoop]: Abstraction has has 326 places, 396 transitions, 4281 flow [2022-01-19 01:45:33,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:33,384 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:33,384 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:33,401 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 01:45:33,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 01:45:33,601 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:33,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:33,602 INFO L85 PathProgramCache]: Analyzing trace with hash -229897099, now seen corresponding path program 6 times [2022-01-19 01:45:33,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:33,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329680673] [2022-01-19 01:45:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:33,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:33,789 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 01:45:33,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:33,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329680673] [2022-01-19 01:45:33,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329680673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:33,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320262304] [2022-01-19 01:45:33,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 01:45:33,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:33,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:33,791 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 01:45:33,792 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 01:45:33,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 01:45:33,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:33,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:45:33,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:34,299 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 01:45:34,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:34,779 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 01:45:34,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320262304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:34,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:34,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 01:45:34,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278440867] [2022-01-19 01:45:34,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:34,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 01:45:34,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:34,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 01:45:34,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 01:45:34,783 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:45:34,784 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 396 transitions, 4281 flow. Second operand has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:34,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:34,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:45:34,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:35,881 INFO L129 PetriNetUnfolder]: 406/1417 cut-off events. [2022-01-19 01:45:35,882 INFO L130 PetriNetUnfolder]: For 10316/10316 co-relation queries the response was YES. [2022-01-19 01:45:35,889 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6866 conditions, 1417 events. 406/1417 cut-off events. For 10316/10316 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10763 event pairs, 36 based on Foata normal form. 2/1413 useless extension candidates. Maximal degree in co-relation 6802. Up to 535 conditions per place. [2022-01-19 01:45:35,895 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 151 selfloop transitions, 238 changer transitions 12/443 dead transitions. [2022-01-19 01:45:35,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 443 transitions, 5489 flow [2022-01-19 01:45:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 01:45:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 01:45:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2022-01-19 01:45:35,897 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2022-01-19 01:45:35,897 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2022-01-19 01:45:35,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2022-01-19 01:45:35,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:35,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2022-01-19 01:45:35,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:35,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:35,902 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:35,902 INFO L186 Difference]: Start difference. First operand has 326 places, 396 transitions, 4281 flow. Second operand 33 states and 1827 transitions. [2022-01-19 01:45:35,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 443 transitions, 5489 flow [2022-01-19 01:45:35,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 443 transitions, 5352 flow, removed 43 selfloop flow, removed 12 redundant places. [2022-01-19 01:45:35,953 INFO L242 Difference]: Finished difference. Result has 355 places, 405 transitions, 4946 flow [2022-01-19 01:45:35,953 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4946, PETRI_PLACES=355, PETRI_TRANSITIONS=405} [2022-01-19 01:45:35,954 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 276 predicate places. [2022-01-19 01:45:35,954 INFO L470 AbstractCegarLoop]: Abstraction has has 355 places, 405 transitions, 4946 flow [2022-01-19 01:45:35,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:35,954 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:35,954 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:35,970 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 01:45:36,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:36,167 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1819115727, now seen corresponding path program 7 times [2022-01-19 01:45:36,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:36,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736290485] [2022-01-19 01:45:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:36,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:36,355 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 01:45:36,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:36,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736290485] [2022-01-19 01:45:36,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736290485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:36,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590573668] [2022-01-19 01:45:36,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 01:45:36,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:36,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:36,357 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 01:45:36,357 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 01:45:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:36,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:45:36,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:36,862 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 01:45:36,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:37,334 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 01:45:37,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590573668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:37,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:37,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 01:45:37,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158901863] [2022-01-19 01:45:37,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:37,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 01:45:37,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:37,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 01:45:37,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 01:45:37,337 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:45:37,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 405 transitions, 4946 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:37,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:37,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:45:37,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:40,237 INFO L129 PetriNetUnfolder]: 494/1679 cut-off events. [2022-01-19 01:45:40,237 INFO L130 PetriNetUnfolder]: For 13126/13126 co-relation queries the response was YES. [2022-01-19 01:45:40,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8926 conditions, 1679 events. 494/1679 cut-off events. For 13126/13126 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13161 event pairs, 26 based on Foata normal form. 1/1673 useless extension candidates. Maximal degree in co-relation 8853. Up to 414 conditions per place. [2022-01-19 01:45:40,252 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 173 selfloop transitions, 385 changer transitions 6/606 dead transitions. [2022-01-19 01:45:40,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 606 transitions, 8475 flow [2022-01-19 01:45:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 01:45:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 01:45:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3882 transitions. [2022-01-19 01:45:40,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6231139646869984 [2022-01-19 01:45:40,256 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3882 transitions. [2022-01-19 01:45:40,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3882 transitions. [2022-01-19 01:45:40,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:40,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3882 transitions. [2022-01-19 01:45:40,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 55.457142857142856) internal successors, (3882), 70 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:40,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:40,265 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:40,266 INFO L186 Difference]: Start difference. First operand has 355 places, 405 transitions, 4946 flow. Second operand 70 states and 3882 transitions. [2022-01-19 01:45:40,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 606 transitions, 8475 flow [2022-01-19 01:45:40,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 606 transitions, 8137 flow, removed 39 selfloop flow, removed 22 redundant places. [2022-01-19 01:45:40,326 INFO L242 Difference]: Finished difference. Result has 410 places, 528 transitions, 7637 flow [2022-01-19 01:45:40,326 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4718, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=7637, PETRI_PLACES=410, PETRI_TRANSITIONS=528} [2022-01-19 01:45:40,326 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 331 predicate places. [2022-01-19 01:45:40,326 INFO L470 AbstractCegarLoop]: Abstraction has has 410 places, 528 transitions, 7637 flow [2022-01-19 01:45:40,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:40,327 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:40,327 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:40,343 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 01:45:40,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:40,543 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:40,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:40,544 INFO L85 PathProgramCache]: Analyzing trace with hash -433616245, now seen corresponding path program 8 times [2022-01-19 01:45:40,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:40,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516508809] [2022-01-19 01:45:40,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:40,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:40,750 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 01:45:40,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:40,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516508809] [2022-01-19 01:45:40,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516508809] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:40,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672701299] [2022-01-19 01:45:40,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:45:40,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:40,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:40,751 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 01:45:40,753 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 01:45:40,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:45:40,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:40,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:45:40,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:41,258 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 01:45:41,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:41,703 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 01:45:41,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672701299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:41,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:41,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 01:45:41,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342565262] [2022-01-19 01:45:41,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:41,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 01:45:41,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:41,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 01:45:41,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 01:45:41,705 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:45:41,706 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 528 transitions, 7637 flow. Second operand has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:41,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:41,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:45:41,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:45,973 INFO L129 PetriNetUnfolder]: 590/2044 cut-off events. [2022-01-19 01:45:45,974 INFO L130 PetriNetUnfolder]: For 21449/21449 co-relation queries the response was YES. [2022-01-19 01:45:45,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11819 conditions, 2044 events. 590/2044 cut-off events. For 21449/21449 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17350 event pairs, 22 based on Foata normal form. 2/2036 useless extension candidates. Maximal degree in co-relation 11738. Up to 409 conditions per place. [2022-01-19 01:45:45,994 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 190 selfloop transitions, 484 changer transitions 12/728 dead transitions. [2022-01-19 01:45:45,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 728 transitions, 11426 flow [2022-01-19 01:45:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-19 01:45:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-01-19 01:45:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5044 transitions. [2022-01-19 01:45:45,998 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.622792937399679 [2022-01-19 01:45:45,998 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5044 transitions. [2022-01-19 01:45:45,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5044 transitions. [2022-01-19 01:45:45,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:45,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5044 transitions. [2022-01-19 01:45:46,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 55.42857142857143) internal successors, (5044), 91 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:46,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:46,011 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:46,011 INFO L186 Difference]: Start difference. First operand has 410 places, 528 transitions, 7637 flow. Second operand 91 states and 5044 transitions. [2022-01-19 01:45:46,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 728 transitions, 11426 flow [2022-01-19 01:45:46,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 728 transitions, 10858 flow, removed 182 selfloop flow, removed 26 redundant places. [2022-01-19 01:45:46,123 INFO L242 Difference]: Finished difference. Result has 487 places, 626 transitions, 9983 flow [2022-01-19 01:45:46,124 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=7151, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=9983, PETRI_PLACES=487, PETRI_TRANSITIONS=626} [2022-01-19 01:45:46,124 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 408 predicate places. [2022-01-19 01:45:46,124 INFO L470 AbstractCegarLoop]: Abstraction has has 487 places, 626 transitions, 9983 flow [2022-01-19 01:45:46,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:46,124 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:46,124 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:46,153 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 01:45:46,353 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,SelfDestructingSolverStorable14 [2022-01-19 01:45:46,353 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:46,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:46,354 INFO L85 PathProgramCache]: Analyzing trace with hash -466440371, now seen corresponding path program 9 times [2022-01-19 01:45:46,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:46,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832814899] [2022-01-19 01:45:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:46,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:46,562 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 01:45:46,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:46,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832814899] [2022-01-19 01:45:46,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832814899] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:46,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270311007] [2022-01-19 01:45:46,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:45:46,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:46,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:46,564 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 01:45:46,565 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 01:45:46,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 01:45:46,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:46,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:45:46,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:47,076 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 01:45:47,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:47,577 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 01:45:47,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270311007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:47,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:47,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 01:45:47,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666977098] [2022-01-19 01:45:47,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:47,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 01:45:47,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:47,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 01:45:47,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 01:45:47,580 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:45:47,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 626 transitions, 9983 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:47,581 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:47,581 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:45:47,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:50,122 INFO L129 PetriNetUnfolder]: 638/2144 cut-off events. [2022-01-19 01:45:50,122 INFO L130 PetriNetUnfolder]: For 30839/30841 co-relation queries the response was YES. [2022-01-19 01:45:50,134 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13566 conditions, 2144 events. 638/2144 cut-off events. For 30839/30841 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18076 event pairs, 34 based on Foata normal form. 2/2136 useless extension candidates. Maximal degree in co-relation 13472. Up to 427 conditions per place. [2022-01-19 01:45:50,144 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 254 selfloop transitions, 451 changer transitions 12/759 dead transitions. [2022-01-19 01:45:50,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 759 transitions, 12990 flow [2022-01-19 01:45:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-19 01:45:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-01-19 01:45:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3584 transitions. [2022-01-19 01:45:50,146 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6292134831460674 [2022-01-19 01:45:50,147 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3584 transitions. [2022-01-19 01:45:50,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3584 transitions. [2022-01-19 01:45:50,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:50,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3584 transitions. [2022-01-19 01:45:50,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 56.0) internal successors, (3584), 64 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:50,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:50,154 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:50,154 INFO L186 Difference]: Start difference. First operand has 487 places, 626 transitions, 9983 flow. Second operand 64 states and 3584 transitions. [2022-01-19 01:45:50,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 759 transitions, 12990 flow [2022-01-19 01:45:50,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 759 transitions, 11785 flow, removed 313 selfloop flow, removed 60 redundant places. [2022-01-19 01:45:50,312 INFO L242 Difference]: Finished difference. Result has 491 places, 671 transitions, 10859 flow [2022-01-19 01:45:50,312 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=8973, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=10859, PETRI_PLACES=491, PETRI_TRANSITIONS=671} [2022-01-19 01:45:50,312 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 412 predicate places. [2022-01-19 01:45:50,313 INFO L470 AbstractCegarLoop]: Abstraction has has 491 places, 671 transitions, 10859 flow [2022-01-19 01:45:50,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:50,313 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:50,313 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:50,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 01:45:50,526 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,SelfDestructingSolverStorable15 [2022-01-19 01:45:50,526 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:50,527 INFO L85 PathProgramCache]: Analyzing trace with hash 315383393, now seen corresponding path program 10 times [2022-01-19 01:45:50,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:50,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684788005] [2022-01-19 01:45:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:50,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:50,710 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 01:45:50,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:50,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684788005] [2022-01-19 01:45:50,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684788005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:50,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215609843] [2022-01-19 01:45:50,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 01:45:50,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:50,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:50,712 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 01:45:50,713 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 01:45:50,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 01:45:50,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:50,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:45:50,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:51,222 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 01:45:51,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:51,657 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 01:45:51,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215609843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:51,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:51,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 01:45:51,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679731855] [2022-01-19 01:45:51,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:51,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 01:45:51,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:51,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 01:45:51,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 01:45:51,659 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:45:51,660 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 671 transitions, 10859 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:51,660 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:51,660 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:45:51,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:52,765 INFO L129 PetriNetUnfolder]: 636/2124 cut-off events. [2022-01-19 01:45:52,765 INFO L130 PetriNetUnfolder]: For 26755/26760 co-relation queries the response was YES. [2022-01-19 01:45:52,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13414 conditions, 2124 events. 636/2124 cut-off events. For 26755/26760 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17820 event pairs, 65 based on Foata normal form. 5/2113 useless extension candidates. Maximal degree in co-relation 13323. Up to 864 conditions per place. [2022-01-19 01:45:52,788 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 304 selfloop transitions, 350 changer transitions 6/702 dead transitions. [2022-01-19 01:45:52,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 702 transitions, 12545 flow [2022-01-19 01:45:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-19 01:45:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-01-19 01:45:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1503 transitions. [2022-01-19 01:45:52,790 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6254681647940075 [2022-01-19 01:45:52,790 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1503 transitions. [2022-01-19 01:45:52,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1503 transitions. [2022-01-19 01:45:52,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:52,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1503 transitions. [2022-01-19 01:45:52,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.666666666666664) internal successors, (1503), 27 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:52,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:52,793 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:52,793 INFO L186 Difference]: Start difference. First operand has 491 places, 671 transitions, 10859 flow. Second operand 27 states and 1503 transitions. [2022-01-19 01:45:52,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 702 transitions, 12545 flow [2022-01-19 01:45:52,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 702 transitions, 12136 flow, removed 92 selfloop flow, removed 43 redundant places. [2022-01-19 01:45:52,956 INFO L242 Difference]: Finished difference. Result has 471 places, 677 transitions, 11585 flow [2022-01-19 01:45:52,956 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=10459, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11585, PETRI_PLACES=471, PETRI_TRANSITIONS=677} [2022-01-19 01:45:52,957 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 392 predicate places. [2022-01-19 01:45:52,957 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 677 transitions, 11585 flow [2022-01-19 01:45:52,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:52,957 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:52,957 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:52,973 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 01:45:53,171 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,SelfDestructingSolverStorable16 [2022-01-19 01:45:53,171 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:53,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:53,172 INFO L85 PathProgramCache]: Analyzing trace with hash -998248241, now seen corresponding path program 11 times [2022-01-19 01:45:53,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:53,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744425988] [2022-01-19 01:45:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:53,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:53,365 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 01:45:53,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:53,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744425988] [2022-01-19 01:45:53,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744425988] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:53,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278016512] [2022-01-19 01:45:53,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 01:45:53,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:53,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:53,376 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 01:45:53,377 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 01:45:53,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:45:53,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:53,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:45:53,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:53,902 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 01:45:53,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:54,357 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 01:45:54,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278016512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:54,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:54,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 01:45:54,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685151338] [2022-01-19 01:45:54,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:54,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 01:45:54,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:54,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 01:45:54,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 01:45:54,359 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:45:54,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 677 transitions, 11585 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:54,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:54,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:45:54,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:55,861 INFO L129 PetriNetUnfolder]: 642/2363 cut-off events. [2022-01-19 01:45:55,861 INFO L130 PetriNetUnfolder]: For 32188/32193 co-relation queries the response was YES. [2022-01-19 01:45:55,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14630 conditions, 2363 events. 642/2363 cut-off events. For 32188/32193 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21032 event pairs, 57 based on Foata normal form. 5/2362 useless extension candidates. Maximal degree in co-relation 14540. Up to 860 conditions per place. [2022-01-19 01:45:55,887 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 287 selfloop transitions, 387 changer transitions 6/722 dead transitions. [2022-01-19 01:45:55,887 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 722 transitions, 13476 flow [2022-01-19 01:45:55,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-19 01:45:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-01-19 01:45:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2022-01-19 01:45:55,889 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6260533707865169 [2022-01-19 01:45:55,889 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2022-01-19 01:45:55,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2022-01-19 01:45:55,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:55,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2022-01-19 01:45:55,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:55,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:55,893 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:55,893 INFO L186 Difference]: Start difference. First operand has 471 places, 677 transitions, 11585 flow. Second operand 32 states and 1783 transitions. [2022-01-19 01:45:55,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 722 transitions, 13476 flow [2022-01-19 01:45:56,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 722 transitions, 13180 flow, removed 6 selfloop flow, removed 18 redundant places. [2022-01-19 01:45:56,064 INFO L242 Difference]: Finished difference. Result has 489 places, 689 transitions, 12706 flow [2022-01-19 01:45:56,065 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=11297, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12706, PETRI_PLACES=489, PETRI_TRANSITIONS=689} [2022-01-19 01:45:56,065 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 410 predicate places. [2022-01-19 01:45:56,065 INFO L470 AbstractCegarLoop]: Abstraction has has 489 places, 689 transitions, 12706 flow [2022-01-19 01:45:56,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:56,065 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:56,065 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:56,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-19 01:45:56,279 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,SelfDestructingSolverStorable17 [2022-01-19 01:45:56,279 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:56,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1655604447, now seen corresponding path program 12 times [2022-01-19 01:45:56,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:56,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597363575] [2022-01-19 01:45:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:56,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:56,478 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 01:45:56,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:56,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597363575] [2022-01-19 01:45:56,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597363575] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:56,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885078936] [2022-01-19 01:45:56,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 01:45:56,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:56,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:56,480 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 01:45:56,481 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 01:45:56,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 01:45:56,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:56,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:45:56,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:56,992 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 01:45:56,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:57,487 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 01:45:57,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885078936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:57,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:57,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 01:45:57,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878611180] [2022-01-19 01:45:57,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:57,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 01:45:57,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:57,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 01:45:57,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 01:45:57,489 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:45:57,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 689 transitions, 12706 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:57,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:57,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:45:57,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:59,500 INFO L129 PetriNetUnfolder]: 708/2630 cut-off events. [2022-01-19 01:45:59,501 INFO L130 PetriNetUnfolder]: For 41222/41227 co-relation queries the response was YES. [2022-01-19 01:45:59,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17207 conditions, 2630 events. 708/2630 cut-off events. For 41222/41227 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24176 event pairs, 41 based on Foata normal form. 5/2629 useless extension candidates. Maximal degree in co-relation 17112. Up to 693 conditions per place. [2022-01-19 01:45:59,529 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 315 selfloop transitions, 457 changer transitions 6/820 dead transitions. [2022-01-19 01:45:59,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 820 transitions, 16270 flow [2022-01-19 01:45:59,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-19 01:45:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-01-19 01:45:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2573 transitions. [2022-01-19 01:45:59,531 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6284807034684905 [2022-01-19 01:45:59,531 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2573 transitions. [2022-01-19 01:45:59,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2573 transitions. [2022-01-19 01:45:59,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:59,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2573 transitions. [2022-01-19 01:45:59,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 55.93478260869565) internal successors, (2573), 46 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:59,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 89.0) internal successors, (4183), 47 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:59,537 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 89.0) internal successors, (4183), 47 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:59,537 INFO L186 Difference]: Start difference. First operand has 489 places, 689 transitions, 12706 flow. Second operand 46 states and 2573 transitions. [2022-01-19 01:45:59,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 820 transitions, 16270 flow [2022-01-19 01:45:59,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 820 transitions, 16139 flow, removed 20 selfloop flow, removed 22 redundant places. [2022-01-19 01:45:59,754 INFO L242 Difference]: Finished difference. Result has 517 places, 742 transitions, 15025 flow [2022-01-19 01:45:59,754 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=12581, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=15025, PETRI_PLACES=517, PETRI_TRANSITIONS=742} [2022-01-19 01:45:59,755 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 438 predicate places. [2022-01-19 01:45:59,755 INFO L470 AbstractCegarLoop]: Abstraction has has 517 places, 742 transitions, 15025 flow [2022-01-19 01:45:59,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:59,755 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:59,755 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:59,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 01:45:59,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:59,956 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1198139793, now seen corresponding path program 13 times [2022-01-19 01:45:59,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:59,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394813194] [2022-01-19 01:45:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:59,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:00,191 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 01:46:00,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:46:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394813194] [2022-01-19 01:46:00,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394813194] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:46:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972324417] [2022-01-19 01:46:00,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 01:46:00,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:00,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:46:00,193 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 01:46:00,193 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 01:46:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:00,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:46:00,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:46:00,689 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 01:46:00,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:46:01,152 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 01:46:01,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972324417] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:46:01,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:46:01,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 01:46:01,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908361230] [2022-01-19 01:46:01,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:46:01,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 01:46:01,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:46:01,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 01:46:01,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 01:46:01,154 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:46:01,159 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 742 transitions, 15025 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:01,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:46:01,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:46:01,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:46:04,421 INFO L129 PetriNetUnfolder]: 796/2952 cut-off events. [2022-01-19 01:46:04,422 INFO L130 PetriNetUnfolder]: For 56034/56059 co-relation queries the response was YES. [2022-01-19 01:46:04,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20425 conditions, 2952 events. 796/2952 cut-off events. For 56034/56059 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27940 event pairs, 39 based on Foata normal form. 8/2954 useless extension candidates. Maximal degree in co-relation 20325. Up to 699 conditions per place. [2022-01-19 01:46:04,453 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 263 selfloop transitions, 615 changer transitions 6/926 dead transitions. [2022-01-19 01:46:04,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 926 transitions, 19721 flow [2022-01-19 01:46:04,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-19 01:46:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-01-19 01:46:04,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 3995 transitions. [2022-01-19 01:46:04,456 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6234394506866417 [2022-01-19 01:46:04,456 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 3995 transitions. [2022-01-19 01:46:04,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 3995 transitions. [2022-01-19 01:46:04,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:46:04,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 3995 transitions. [2022-01-19 01:46:04,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 55.486111111111114) internal successors, (3995), 72 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:04,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 89.0) internal successors, (6497), 73 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:04,463 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 89.0) internal successors, (6497), 73 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:04,463 INFO L186 Difference]: Start difference. First operand has 517 places, 742 transitions, 15025 flow. Second operand 72 states and 3995 transitions. [2022-01-19 01:46:04,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 926 transitions, 19721 flow [2022-01-19 01:46:04,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 926 transitions, 19300 flow, removed 49 selfloop flow, removed 25 redundant places. [2022-01-19 01:46:04,714 INFO L242 Difference]: Finished difference. Result has 572 places, 840 transitions, 18614 flow [2022-01-19 01:46:04,714 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=14664, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=18614, PETRI_PLACES=572, PETRI_TRANSITIONS=840} [2022-01-19 01:46:04,715 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 493 predicate places. [2022-01-19 01:46:04,715 INFO L470 AbstractCegarLoop]: Abstraction has has 572 places, 840 transitions, 18614 flow [2022-01-19 01:46:04,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:04,715 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:46:04,715 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:46:04,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 01:46:04,915 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,SelfDestructingSolverStorable19 [2022-01-19 01:46:04,916 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:46:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:46:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash -54177703, now seen corresponding path program 14 times [2022-01-19 01:46:04,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:46:04,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697215119] [2022-01-19 01:46:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:46:04,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:46:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:05,068 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 01:46:05,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:46:05,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697215119] [2022-01-19 01:46:05,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697215119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:46:05,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104715503] [2022-01-19 01:46:05,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:46:05,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:05,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:46:05,070 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 01:46:05,071 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 01:46:05,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:46:05,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:46:05,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:46:05,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:46:05,558 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 01:46:05,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:46:06,017 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 01:46:06,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104715503] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:46:06,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:46:06,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 01:46:06,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377303555] [2022-01-19 01:46:06,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:46:06,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 01:46:06,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:46:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 01:46:06,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 01:46:06,020 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:46:06,021 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 840 transitions, 18614 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:06,021 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:46:06,021 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:46:06,021 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:46:07,511 INFO L129 PetriNetUnfolder]: 796/2931 cut-off events. [2022-01-19 01:46:07,511 INFO L130 PetriNetUnfolder]: For 63100/63116 co-relation queries the response was YES. [2022-01-19 01:46:07,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21820 conditions, 2931 events. 796/2931 cut-off events. For 63100/63116 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27601 event pairs, 100 based on Foata normal form. 3/2908 useless extension candidates. Maximal degree in co-relation 21712. Up to 1045 conditions per place. [2022-01-19 01:46:07,542 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 361 selfloop transitions, 464 changer transitions 6/873 dead transitions. [2022-01-19 01:46:07,542 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 873 transitions, 20686 flow [2022-01-19 01:46:07,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-19 01:46:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-01-19 01:46:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1666 transitions. [2022-01-19 01:46:07,543 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6239700374531835 [2022-01-19 01:46:07,543 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1666 transitions. [2022-01-19 01:46:07,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1666 transitions. [2022-01-19 01:46:07,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:46:07,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1666 transitions. [2022-01-19 01:46:07,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.53333333333333) internal successors, (1666), 30 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:07,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 89.0) internal successors, (2759), 31 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:07,547 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 89.0) internal successors, (2759), 31 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:07,547 INFO L186 Difference]: Start difference. First operand has 572 places, 840 transitions, 18614 flow. Second operand 30 states and 1666 transitions. [2022-01-19 01:46:07,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 873 transitions, 20686 flow [2022-01-19 01:46:07,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 873 transitions, 19949 flow, removed 80 selfloop flow, removed 40 redundant places. [2022-01-19 01:46:07,859 INFO L242 Difference]: Finished difference. Result has 565 places, 849 transitions, 19336 flow [2022-01-19 01:46:07,860 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=17892, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=19336, PETRI_PLACES=565, PETRI_TRANSITIONS=849} [2022-01-19 01:46:07,860 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 486 predicate places. [2022-01-19 01:46:07,860 INFO L470 AbstractCegarLoop]: Abstraction has has 565 places, 849 transitions, 19336 flow [2022-01-19 01:46:07,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:07,860 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:46:07,861 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:46:07,878 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 01:46:08,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:08,061 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:46:08,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:46:08,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2075614249, now seen corresponding path program 15 times [2022-01-19 01:46:08,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:46:08,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23710237] [2022-01-19 01:46:08,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:46:08,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:46:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:08,260 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 01:46:08,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:46:08,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23710237] [2022-01-19 01:46:08,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23710237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:46:08,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462959280] [2022-01-19 01:46:08,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:46:08,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:08,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:46:08,262 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 01:46:08,262 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 01:46:08,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 01:46:08,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:46:08,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:46:08,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:46:08,802 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 01:46:08,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:46:09,255 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 01:46:09,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462959280] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:46:09,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:46:09,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 01:46:09,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541973925] [2022-01-19 01:46:09,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:46:09,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 01:46:09,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:46:09,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 01:46:09,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 01:46:09,258 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:46:09,258 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 849 transitions, 19336 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:09,259 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:46:09,259 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:46:09,259 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:46:14,277 INFO L129 PetriNetUnfolder]: 915/3385 cut-off events. [2022-01-19 01:46:14,277 INFO L130 PetriNetUnfolder]: For 80574/80583 co-relation queries the response was YES. [2022-01-19 01:46:14,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25522 conditions, 3385 events. 915/3385 cut-off events. For 80574/80583 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33109 event pairs, 52 based on Foata normal form. 4/3375 useless extension candidates. Maximal degree in co-relation 25411. Up to 893 conditions per place. [2022-01-19 01:46:14,318 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 285 selfloop transitions, 763 changer transitions 6/1096 dead transitions. [2022-01-19 01:46:14,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 1096 transitions, 26202 flow [2022-01-19 01:46:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-19 01:46:14,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-01-19 01:46:14,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 5464 transitions. [2022-01-19 01:46:14,322 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.62013392350471 [2022-01-19 01:46:14,322 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 5464 transitions. [2022-01-19 01:46:14,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 5464 transitions. [2022-01-19 01:46:14,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:46:14,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 5464 transitions. [2022-01-19 01:46:14,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 55.19191919191919) internal successors, (5464), 99 states have internal predecessors, (5464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:14,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 89.0) internal successors, (8900), 100 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:14,332 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 89.0) internal successors, (8900), 100 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:14,332 INFO L186 Difference]: Start difference. First operand has 565 places, 849 transitions, 19336 flow. Second operand 99 states and 5464 transitions. [2022-01-19 01:46:14,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 1096 transitions, 26202 flow [2022-01-19 01:46:14,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 1096 transitions, 25760 flow, removed 12 selfloop flow, removed 18 redundant places. [2022-01-19 01:46:14,734 INFO L242 Difference]: Finished difference. Result has 659 places, 1014 transitions, 24999 flow [2022-01-19 01:46:14,735 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=18955, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=24999, PETRI_PLACES=659, PETRI_TRANSITIONS=1014} [2022-01-19 01:46:14,735 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 580 predicate places. [2022-01-19 01:46:14,736 INFO L470 AbstractCegarLoop]: Abstraction has has 659 places, 1014 transitions, 24999 flow [2022-01-19 01:46:14,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:14,736 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:46:14,736 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:46:14,767 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 01:46:14,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:14,968 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:46:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:46:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash 796033221, now seen corresponding path program 16 times [2022-01-19 01:46:14,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:46:14,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521790286] [2022-01-19 01:46:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:46:14,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:46:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:15,183 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 01:46:15,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:46:15,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521790286] [2022-01-19 01:46:15,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521790286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:46:15,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049073293] [2022-01-19 01:46:15,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 01:46:15,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:15,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:46:15,184 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 01:46:15,185 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 01:46:15,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 01:46:15,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:46:15,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:46:15,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:46:15,681 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 01:46:15,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:46:16,151 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 01:46:16,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049073293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:46:16,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:46:16,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 01:46:16,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754279316] [2022-01-19 01:46:16,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:46:16,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 01:46:16,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:46:16,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 01:46:16,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 01:46:16,153 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:46:16,154 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 1014 transitions, 24999 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:16,154 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:46:16,154 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:46:16,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:46:19,956 INFO L129 PetriNetUnfolder]: 1104/3894 cut-off events. [2022-01-19 01:46:19,956 INFO L130 PetriNetUnfolder]: For 116802/116811 co-relation queries the response was YES. [2022-01-19 01:46:19,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31688 conditions, 3894 events. 1104/3894 cut-off events. For 116802/116811 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38517 event pairs, 101 based on Foata normal form. 4/3884 useless extension candidates. Maximal degree in co-relation 31562. Up to 955 conditions per place. [2022-01-19 01:46:20,012 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 409 selfloop transitions, 798 changer transitions 6/1255 dead transitions. [2022-01-19 01:46:20,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 1255 transitions, 32008 flow [2022-01-19 01:46:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 01:46:20,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 01:46:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3922 transitions. [2022-01-19 01:46:20,015 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6295345104333868 [2022-01-19 01:46:20,015 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3922 transitions. [2022-01-19 01:46:20,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3922 transitions. [2022-01-19 01:46:20,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:46:20,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3922 transitions. [2022-01-19 01:46:20,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 56.02857142857143) internal successors, (3922), 70 states have internal predecessors, (3922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:20,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:20,104 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:20,104 INFO L186 Difference]: Start difference. First operand has 659 places, 1014 transitions, 24999 flow. Second operand 70 states and 3922 transitions. [2022-01-19 01:46:20,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 1255 transitions, 32008 flow [2022-01-19 01:46:20,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 1255 transitions, 30845 flow, removed 417 selfloop flow, removed 24 redundant places. [2022-01-19 01:46:20,776 INFO L242 Difference]: Finished difference. Result has 709 places, 1162 transitions, 29702 flow [2022-01-19 01:46:20,777 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=23988, PETRI_DIFFERENCE_MINUEND_PLACES=631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=660, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=29702, PETRI_PLACES=709, PETRI_TRANSITIONS=1162} [2022-01-19 01:46:20,777 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 630 predicate places. [2022-01-19 01:46:20,777 INFO L470 AbstractCegarLoop]: Abstraction has has 709 places, 1162 transitions, 29702 flow [2022-01-19 01:46:20,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:20,778 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:46:20,778 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:46:20,796 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 01:46:20,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-19 01:46:20,989 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:46:20,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:46:20,989 INFO L85 PathProgramCache]: Analyzing trace with hash 736810587, now seen corresponding path program 17 times [2022-01-19 01:46:20,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:46:20,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900914635] [2022-01-19 01:46:20,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:46:20,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:46:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:21,150 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 01:46:21,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:46:21,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900914635] [2022-01-19 01:46:21,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900914635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:46:21,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731141468] [2022-01-19 01:46:21,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 01:46:21,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:21,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:46:21,152 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 01:46:21,152 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 01:46:21,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:46:21,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:46:21,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:46:21,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:46:21,633 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 01:46:21,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:46:22,078 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 01:46:22,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731141468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:46:22,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:46:22,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 01:46:22,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235423103] [2022-01-19 01:46:22,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:46:22,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 01:46:22,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:46:22,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 01:46:22,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 01:46:22,080 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:46:22,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 1162 transitions, 29702 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:22,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:46:22,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:46:22,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:46:24,206 INFO L129 PetriNetUnfolder]: 1103/3865 cut-off events. [2022-01-19 01:46:24,206 INFO L130 PetriNetUnfolder]: For 124447/124464 co-relation queries the response was YES. [2022-01-19 01:46:24,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32951 conditions, 3865 events. 1103/3865 cut-off events. For 124447/124464 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38227 event pairs, 122 based on Foata normal form. 7/3858 useless extension candidates. Maximal degree in co-relation 32818. Up to 1655 conditions per place. [2022-01-19 01:46:24,264 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 507 selfloop transitions, 632 changer transitions 6/1187 dead transitions. [2022-01-19 01:46:24,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 1187 transitions, 32376 flow [2022-01-19 01:46:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 01:46:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 01:46:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2022-01-19 01:46:24,266 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2022-01-19 01:46:24,266 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2022-01-19 01:46:24,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2022-01-19 01:46:24,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:46:24,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2022-01-19 01:46:24,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:24,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:24,269 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:24,269 INFO L186 Difference]: Start difference. First operand has 709 places, 1162 transitions, 29702 flow. Second operand 33 states and 1827 transitions. [2022-01-19 01:46:24,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 1187 transitions, 32376 flow [2022-01-19 01:46:25,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 707 places, 1187 transitions, 31551 flow, removed 205 selfloop flow, removed 28 redundant places. [2022-01-19 01:46:25,069 INFO L242 Difference]: Finished difference. Result has 712 places, 1167 transitions, 30309 flow [2022-01-19 01:46:25,070 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=28881, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=627, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=30309, PETRI_PLACES=712, PETRI_TRANSITIONS=1167} [2022-01-19 01:46:25,071 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 633 predicate places. [2022-01-19 01:46:25,071 INFO L470 AbstractCegarLoop]: Abstraction has has 712 places, 1167 transitions, 30309 flow [2022-01-19 01:46:25,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:25,071 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:46:25,071 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:46:25,093 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 01:46:25,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:25,294 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:46:25,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:46:25,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1576843099, now seen corresponding path program 18 times [2022-01-19 01:46:25,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:46:25,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589193537] [2022-01-19 01:46:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:46:25,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:46:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:25,444 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 01:46:25,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:46:25,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589193537] [2022-01-19 01:46:25,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589193537] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:46:25,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527568558] [2022-01-19 01:46:25,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 01:46:25,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:25,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:46:25,446 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 01:46:25,446 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 01:46:25,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 01:46:25,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:46:25,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 01:46:25,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:46:25,921 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 01:46:25,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:46:26,374 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 01:46:26,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527568558] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:46:26,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:46:26,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 01:46:26,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944496689] [2022-01-19 01:46:26,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:46:26,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 01:46:26,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:46:26,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 01:46:26,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 01:46:26,377 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:46:26,378 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 1167 transitions, 30309 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:26,378 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:46:26,378 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:46:26,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:46:28,299 INFO L129 PetriNetUnfolder]: 1103/3850 cut-off events. [2022-01-19 01:46:28,299 INFO L130 PetriNetUnfolder]: For 129899/129916 co-relation queries the response was YES. [2022-01-19 01:46:28,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33283 conditions, 3850 events. 1103/3850 cut-off events. For 129899/129916 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 38040 event pairs, 148 based on Foata normal form. 7/3827 useless extension candidates. Maximal degree in co-relation 33147. Up to 1432 conditions per place. [2022-01-19 01:46:28,353 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 562 selfloop transitions, 580 changer transitions 6/1190 dead transitions. [2022-01-19 01:46:28,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 731 places, 1190 transitions, 32977 flow [2022-01-19 01:46:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-19 01:46:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-01-19 01:46:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1445 transitions. [2022-01-19 01:46:28,355 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6244598098530683 [2022-01-19 01:46:28,355 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1445 transitions. [2022-01-19 01:46:28,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1445 transitions. [2022-01-19 01:46:28,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:46:28,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1445 transitions. [2022-01-19 01:46:28,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.57692307692308) internal successors, (1445), 26 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:28,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:28,358 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:28,358 INFO L186 Difference]: Start difference. First operand has 712 places, 1167 transitions, 30309 flow. Second operand 26 states and 1445 transitions. [2022-01-19 01:46:28,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 731 places, 1190 transitions, 32977 flow [2022-01-19 01:46:29,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 1190 transitions, 32558 flow, removed 5 selfloop flow, removed 23 redundant places. [2022-01-19 01:46:29,075 INFO L242 Difference]: Finished difference. Result has 712 places, 1170 transitions, 31655 flow [2022-01-19 01:46:29,076 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=29882, PETRI_DIFFERENCE_MINUEND_PLACES=683, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=574, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=31655, PETRI_PLACES=712, PETRI_TRANSITIONS=1170} [2022-01-19 01:46:29,076 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 633 predicate places. [2022-01-19 01:46:29,076 INFO L470 AbstractCegarLoop]: Abstraction has has 712 places, 1170 transitions, 31655 flow [2022-01-19 01:46:29,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:29,077 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:46:29,077 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:46:29,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-19 01:46:29,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:29,292 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:46:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:46:29,293 INFO L85 PathProgramCache]: Analyzing trace with hash -787992903, now seen corresponding path program 19 times [2022-01-19 01:46:29,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:46:29,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177755371] [2022-01-19 01:46:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:46:29,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:46:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:46:29,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:46:29,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177755371] [2022-01-19 01:46:29,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177755371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:46:29,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151333896] [2022-01-19 01:46:29,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 01:46:29,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:29,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:46:29,505 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 01:46:29,508 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 01:46:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:29,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 01:46:29,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:46:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:46:30,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:46:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:46:30,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151333896] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:46:30,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:46:30,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 01:46:30,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985674845] [2022-01-19 01:46:30,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:46:30,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 01:46:30,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:46:30,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 01:46:30,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1844, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 01:46:30,685 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:46:30,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 1170 transitions, 31655 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:30,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:46:30,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:46:30,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:46:36,059 INFO L129 PetriNetUnfolder]: 1375/4733 cut-off events. [2022-01-19 01:46:36,059 INFO L130 PetriNetUnfolder]: For 177370/177383 co-relation queries the response was YES. [2022-01-19 01:46:36,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43260 conditions, 4733 events. 1375/4733 cut-off events. For 177370/177383 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 47605 event pairs, 79 based on Foata normal form. 27/4743 useless extension candidates. Maximal degree in co-relation 43122. Up to 600 conditions per place. [2022-01-19 01:46:36,173 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 562 selfloop transitions, 992 changer transitions 19/1615 dead transitions. [2022-01-19 01:46:36,173 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 800 places, 1615 transitions, 46623 flow [2022-01-19 01:46:36,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-19 01:46:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2022-01-19 01:46:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 5293 transitions. [2022-01-19 01:46:36,178 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6326798948123357 [2022-01-19 01:46:36,178 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 5293 transitions. [2022-01-19 01:46:36,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 5293 transitions. [2022-01-19 01:46:36,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:46:36,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 5293 transitions. [2022-01-19 01:46:36,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 56.308510638297875) internal successors, (5293), 94 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:36,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 89.0) internal successors, (8455), 95 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:36,188 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 89.0) internal successors, (8455), 95 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:36,188 INFO L186 Difference]: Start difference. First operand has 712 places, 1170 transitions, 31655 flow. Second operand 94 states and 5293 transitions. [2022-01-19 01:46:36,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 800 places, 1615 transitions, 46623 flow [2022-01-19 01:46:37,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 1615 transitions, 45911 flow, removed 36 selfloop flow, removed 16 redundant places. [2022-01-19 01:46:37,105 INFO L242 Difference]: Finished difference. Result has 821 places, 1405 transitions, 42026 flow [2022-01-19 01:46:37,106 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=31162, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=42026, PETRI_PLACES=821, PETRI_TRANSITIONS=1405} [2022-01-19 01:46:37,106 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 742 predicate places. [2022-01-19 01:46:37,107 INFO L470 AbstractCegarLoop]: Abstraction has has 821 places, 1405 transitions, 42026 flow [2022-01-19 01:46:37,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:37,107 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:46:37,107 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:46:37,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-19 01:46:37,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:37,308 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:46:37,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:46:37,308 INFO L85 PathProgramCache]: Analyzing trace with hash -35908573, now seen corresponding path program 20 times [2022-01-19 01:46:37,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:46:37,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721742339] [2022-01-19 01:46:37,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:46:37,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:46:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:46:37,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:46:37,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721742339] [2022-01-19 01:46:37,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721742339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:46:37,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303281025] [2022-01-19 01:46:37,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:46:37,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:37,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:46:37,519 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:46:37,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-19 01:46:37,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:46:37,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:46:37,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 01:46:37,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:46:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:46:38,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:46:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:46:38,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303281025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:46:38,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:46:38,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 01:46:38,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68947162] [2022-01-19 01:46:38,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:46:38,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 01:46:38,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:46:38,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 01:46:38,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 01:46:38,755 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:46:38,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 1405 transitions, 42026 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:38,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:46:38,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:46:38,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:46:47,194 INFO L129 PetriNetUnfolder]: 1669/5623 cut-off events. [2022-01-19 01:46:47,194 INFO L130 PetriNetUnfolder]: For 311604/311626 co-relation queries the response was YES. [2022-01-19 01:46:47,269 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59142 conditions, 5623 events. 1669/5623 cut-off events. For 311604/311626 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 57932 event pairs, 95 based on Foata normal form. 14/5618 useless extension candidates. Maximal degree in co-relation 58969. Up to 767 conditions per place. [2022-01-19 01:46:47,299 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 524 selfloop transitions, 1356 changer transitions 12/1934 dead transitions. [2022-01-19 01:46:47,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 959 places, 1934 transitions, 62327 flow [2022-01-19 01:46:47,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-19 01:46:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2022-01-19 01:46:47,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 8122 transitions. [2022-01-19 01:46:47,304 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6250577189472064 [2022-01-19 01:46:47,304 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 8122 transitions. [2022-01-19 01:46:47,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 8122 transitions. [2022-01-19 01:46:47,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:46:47,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 8122 transitions. [2022-01-19 01:46:47,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 55.63013698630137) internal successors, (8122), 146 states have internal predecessors, (8122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:47,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 89.0) internal successors, (13083), 147 states have internal predecessors, (13083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:47,396 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 89.0) internal successors, (13083), 147 states have internal predecessors, (13083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:47,397 INFO L186 Difference]: Start difference. First operand has 821 places, 1405 transitions, 42026 flow. Second operand 146 states and 8122 transitions. [2022-01-19 01:46:47,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 959 places, 1934 transitions, 62327 flow [2022-01-19 01:46:49,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 913 places, 1934 transitions, 60231 flow, removed 632 selfloop flow, removed 46 redundant places. [2022-01-19 01:46:49,115 INFO L242 Difference]: Finished difference. Result has 944 places, 1717 transitions, 55352 flow [2022-01-19 01:46:49,116 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=40330, PETRI_DIFFERENCE_MINUEND_PLACES=768, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1054, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=55352, PETRI_PLACES=944, PETRI_TRANSITIONS=1717} [2022-01-19 01:46:49,117 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 865 predicate places. [2022-01-19 01:46:49,117 INFO L470 AbstractCegarLoop]: Abstraction has has 944 places, 1717 transitions, 55352 flow [2022-01-19 01:46:49,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:49,117 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:46:49,117 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:46:49,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-19 01:46:49,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-19 01:46:49,318 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:46:49,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:46:49,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2035220517, now seen corresponding path program 1 times [2022-01-19 01:46:49,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:46:49,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521435832] [2022-01-19 01:46:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:46:49,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:46:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:49,473 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 01:46:49,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:46:49,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521435832] [2022-01-19 01:46:49,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521435832] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:46:49,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864461119] [2022-01-19 01:46:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:46:49,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:49,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:46:49,474 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:46:49,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-19 01:46:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:49,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 01:46:49,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:46:49,917 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 01:46:49,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:46:50,238 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 01:46:50,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864461119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:46:50,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:46:50,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2022-01-19 01:46:50,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542156297] [2022-01-19 01:46:50,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:46:50,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 01:46:50,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:46:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 01:46:50,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 01:46:50,240 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-01-19 01:46:50,241 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 944 places, 1717 transitions, 55352 flow. Second operand has 37 states, 37 states have (on average 52.62162162162162) internal successors, (1947), 37 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:50,241 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:46:50,241 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-01-19 01:46:50,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:46:54,396 INFO L129 PetriNetUnfolder]: 1870/5962 cut-off events. [2022-01-19 01:46:54,396 INFO L130 PetriNetUnfolder]: For 367321/367334 co-relation queries the response was YES. [2022-01-19 01:46:54,577 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64730 conditions, 5962 events. 1870/5962 cut-off events. For 367321/367334 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 60573 event pairs, 281 based on Foata normal form. 12/5948 useless extension candidates. Maximal degree in co-relation 64541. Up to 1607 conditions per place. [2022-01-19 01:46:54,609 INFO L132 encePairwiseOnDemand]: 71/89 looper letters, 706 selfloop transitions, 1066 changer transitions 27/1840 dead transitions. [2022-01-19 01:46:54,610 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 991 places, 1840 transitions, 61147 flow [2022-01-19 01:46:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-19 01:46:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-01-19 01:46:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3004 transitions. [2022-01-19 01:46:54,612 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6250520183104453 [2022-01-19 01:46:54,612 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3004 transitions. [2022-01-19 01:46:54,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3004 transitions. [2022-01-19 01:46:54,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:46:54,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3004 transitions. [2022-01-19 01:46:54,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 55.629629629629626) internal successors, (3004), 54 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:54,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:54,617 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:54,617 INFO L186 Difference]: Start difference. First operand has 944 places, 1717 transitions, 55352 flow. Second operand 54 states and 3004 transitions. [2022-01-19 01:46:54,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 991 places, 1840 transitions, 61147 flow [2022-01-19 01:46:56,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 954 places, 1840 transitions, 58962 flow, removed 658 selfloop flow, removed 37 redundant places. [2022-01-19 01:46:56,945 INFO L242 Difference]: Finished difference. Result has 968 places, 1718 transitions, 55563 flow [2022-01-19 01:46:56,947 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=53278, PETRI_DIFFERENCE_MINUEND_PLACES=901, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1059, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=55563, PETRI_PLACES=968, PETRI_TRANSITIONS=1718} [2022-01-19 01:46:56,947 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 889 predicate places. [2022-01-19 01:46:56,947 INFO L470 AbstractCegarLoop]: Abstraction has has 968 places, 1718 transitions, 55563 flow [2022-01-19 01:46:56,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.62162162162162) internal successors, (1947), 37 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:56,947 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:46:56,947 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:46:56,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-19 01:46:57,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 01:46:57,157 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:46:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:46:57,157 INFO L85 PathProgramCache]: Analyzing trace with hash 222909999, now seen corresponding path program 21 times [2022-01-19 01:46:57,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:46:57,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886313052] [2022-01-19 01:46:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:46:57,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:46:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:46:57,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:46:57,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886313052] [2022-01-19 01:46:57,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886313052] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:46:57,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254563154] [2022-01-19 01:46:57,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:46:57,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:57,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:46:57,358 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:46:57,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-19 01:46:57,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 01:46:57,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:46:57,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 01:46:57,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:46:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:46:57,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:46:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:46:58,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254563154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:46:58,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:46:58,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 01:46:58,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908161910] [2022-01-19 01:46:58,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:46:58,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 01:46:58,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:46:58,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 01:46:58,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1848, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 01:46:58,589 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:46:58,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 968 places, 1718 transitions, 55563 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:58,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:46:58,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:46:58,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:47:05,142 INFO L129 PetriNetUnfolder]: 1714/5712 cut-off events. [2022-01-19 01:47:05,143 INFO L130 PetriNetUnfolder]: For 367791/367804 co-relation queries the response was YES. [2022-01-19 01:47:05,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64678 conditions, 5712 events. 1714/5712 cut-off events. For 367791/367804 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 58756 event pairs, 110 based on Foata normal form. 12/5701 useless extension candidates. Maximal degree in co-relation 64486. Up to 966 conditions per place. [2022-01-19 01:47:05,258 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 539 selfloop transitions, 1328 changer transitions 12/1922 dead transitions. [2022-01-19 01:47:05,258 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1057 places, 1922 transitions, 65089 flow [2022-01-19 01:47:05,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-19 01:47:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2022-01-19 01:47:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5929 transitions. [2022-01-19 01:47:05,262 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6225979208232699 [2022-01-19 01:47:05,263 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 5929 transitions. [2022-01-19 01:47:05,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 5929 transitions. [2022-01-19 01:47:05,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:47:05,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 5929 transitions. [2022-01-19 01:47:05,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 55.41121495327103) internal successors, (5929), 107 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:05,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:05,272 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:05,272 INFO L186 Difference]: Start difference. First operand has 968 places, 1718 transitions, 55563 flow. Second operand 107 states and 5929 transitions. [2022-01-19 01:47:05,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1057 places, 1922 transitions, 65089 flow [2022-01-19 01:47:07,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1034 places, 1922 transitions, 64393 flow, removed 106 selfloop flow, removed 23 redundant places. [2022-01-19 01:47:07,508 INFO L242 Difference]: Finished difference. Result has 1051 places, 1792 transitions, 61258 flow [2022-01-19 01:47:07,510 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=55005, PETRI_DIFFERENCE_MINUEND_PLACES=928, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=61258, PETRI_PLACES=1051, PETRI_TRANSITIONS=1792} [2022-01-19 01:47:07,510 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 972 predicate places. [2022-01-19 01:47:07,510 INFO L470 AbstractCegarLoop]: Abstraction has has 1051 places, 1792 transitions, 61258 flow [2022-01-19 01:47:07,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:07,511 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:47:07,511 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:47:07,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-19 01:47:07,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-19 01:47:07,727 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:47:07,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:47:07,727 INFO L85 PathProgramCache]: Analyzing trace with hash -750391429, now seen corresponding path program 22 times [2022-01-19 01:47:07,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:47:07,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848464806] [2022-01-19 01:47:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:47:07,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:47:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:47:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:47:07,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:47:07,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848464806] [2022-01-19 01:47:07,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848464806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:47:07,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728814045] [2022-01-19 01:47:07,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 01:47:07,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:47:07,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:47:07,940 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:47:07,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-19 01:47:07,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 01:47:07,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:47:07,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 01:47:07,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:47:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:47:08,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:47:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:47:09,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728814045] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:47:09,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:47:09,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 01:47:09,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830700028] [2022-01-19 01:47:09,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:47:09,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 01:47:09,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:47:09,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 01:47:09,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1864, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 01:47:09,192 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:47:09,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1051 places, 1792 transitions, 61258 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:09,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:47:09,193 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:47:09,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:47:25,668 INFO L129 PetriNetUnfolder]: 1942/6507 cut-off events. [2022-01-19 01:47:25,668 INFO L130 PetriNetUnfolder]: For 434152/434165 co-relation queries the response was YES. [2022-01-19 01:47:25,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74716 conditions, 6507 events. 1942/6507 cut-off events. For 434152/434165 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 68668 event pairs, 66 based on Foata normal form. 13/6510 useless extension candidates. Maximal degree in co-relation 74516. Up to 846 conditions per place. [2022-01-19 01:47:25,789 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 468 selfloop transitions, 1840 changer transitions 16/2367 dead transitions. [2022-01-19 01:47:25,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1291 places, 2367 transitions, 81834 flow [2022-01-19 01:47:25,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2022-01-19 01:47:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2022-01-19 01:47:25,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 13706 transitions. [2022-01-19 01:47:25,796 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6234817813765182 [2022-01-19 01:47:25,796 INFO L72 ComplementDD]: Start complementDD. Operand 247 states and 13706 transitions. [2022-01-19 01:47:25,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 247 states and 13706 transitions. [2022-01-19 01:47:25,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:47:25,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 247 states and 13706 transitions. [2022-01-19 01:47:25,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 248 states, 247 states have (on average 55.48987854251012) internal successors, (13706), 247 states have internal predecessors, (13706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:25,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 248 states, 248 states have (on average 89.0) internal successors, (22072), 248 states have internal predecessors, (22072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:25,820 INFO L81 ComplementDD]: Finished complementDD. Result has 248 states, 248 states have (on average 89.0) internal successors, (22072), 248 states have internal predecessors, (22072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:25,820 INFO L186 Difference]: Start difference. First operand has 1051 places, 1792 transitions, 61258 flow. Second operand 247 states and 13706 transitions. [2022-01-19 01:47:25,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1291 places, 2367 transitions, 81834 flow [2022-01-19 01:47:28,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1242 places, 2367 transitions, 80472 flow, removed 181 selfloop flow, removed 49 redundant places. [2022-01-19 01:47:28,694 INFO L242 Difference]: Finished difference. Result has 1278 places, 2099 transitions, 75561 flow [2022-01-19 01:47:28,696 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=60174, PETRI_DIFFERENCE_MINUEND_PLACES=996, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=247, PETRI_FLOW=75561, PETRI_PLACES=1278, PETRI_TRANSITIONS=2099} [2022-01-19 01:47:28,696 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1199 predicate places. [2022-01-19 01:47:28,696 INFO L470 AbstractCegarLoop]: Abstraction has has 1278 places, 2099 transitions, 75561 flow [2022-01-19 01:47:28,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:28,697 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:47:28,697 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:47:28,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-19 01:47:28,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:47:28,911 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:47:28,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:47:28,912 INFO L85 PathProgramCache]: Analyzing trace with hash -243325665, now seen corresponding path program 23 times [2022-01-19 01:47:28,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:47:28,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686181078] [2022-01-19 01:47:28,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:47:28,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:47:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:47:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:47:29,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:47:29,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686181078] [2022-01-19 01:47:29,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686181078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:47:29,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663628980] [2022-01-19 01:47:29,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 01:47:29,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:47:29,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:47:29,091 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:47:29,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-19 01:47:29,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 01:47:29,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:47:29,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 01:47:29,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:47:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:47:29,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:47:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:47:30,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663628980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:47:30,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:47:30,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 01:47:30,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22105558] [2022-01-19 01:47:30,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:47:30,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 01:47:30,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:47:30,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 01:47:30,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 01:47:30,345 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:47:30,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1278 places, 2099 transitions, 75561 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:30,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:47:30,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:47:30,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:47:39,888 INFO L129 PetriNetUnfolder]: 2148/7040 cut-off events. [2022-01-19 01:47:39,889 INFO L130 PetriNetUnfolder]: For 631282/631295 co-relation queries the response was YES. [2022-01-19 01:47:39,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90260 conditions, 7040 events. 2148/7040 cut-off events. For 631282/631295 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74820 event pairs, 97 based on Foata normal form. 12/7045 useless extension candidates. Maximal degree in co-relation 90031. Up to 1226 conditions per place. [2022-01-19 01:47:40,043 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 651 selfloop transitions, 1781 changer transitions 12/2487 dead transitions. [2022-01-19 01:47:40,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1406 places, 2487 transitions, 94703 flow [2022-01-19 01:47:40,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-19 01:47:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2022-01-19 01:47:40,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 7490 transitions. [2022-01-19 01:47:40,047 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6233874323761964 [2022-01-19 01:47:40,047 INFO L72 ComplementDD]: Start complementDD. Operand 135 states and 7490 transitions. [2022-01-19 01:47:40,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 135 states and 7490 transitions. [2022-01-19 01:47:40,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:47:40,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 135 states and 7490 transitions. [2022-01-19 01:47:40,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 136 states, 135 states have (on average 55.48148148148148) internal successors, (7490), 135 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:40,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 136 states, 136 states have (on average 89.0) internal successors, (12104), 136 states have internal predecessors, (12104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:40,059 INFO L81 ComplementDD]: Finished complementDD. Result has 136 states, 136 states have (on average 89.0) internal successors, (12104), 136 states have internal predecessors, (12104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:40,059 INFO L186 Difference]: Start difference. First operand has 1278 places, 2099 transitions, 75561 flow. Second operand 135 states and 7490 transitions. [2022-01-19 01:47:40,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1406 places, 2487 transitions, 94703 flow [2022-01-19 01:47:44,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1290 places, 2487 transitions, 90902 flow, removed 1029 selfloop flow, removed 116 redundant places. [2022-01-19 01:47:44,847 INFO L242 Difference]: Finished difference. Result has 1313 places, 2334 transitions, 87142 flow [2022-01-19 01:47:44,848 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=72103, PETRI_DIFFERENCE_MINUEND_PLACES=1156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2099, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=135, PETRI_FLOW=87142, PETRI_PLACES=1313, PETRI_TRANSITIONS=2334} [2022-01-19 01:47:44,849 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1234 predicate places. [2022-01-19 01:47:44,849 INFO L470 AbstractCegarLoop]: Abstraction has has 1313 places, 2334 transitions, 87142 flow [2022-01-19 01:47:44,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:44,849 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:47:44,849 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:47:44,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-19 01:47:45,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:47:45,055 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:47:45,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:47:45,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1161955117, now seen corresponding path program 24 times [2022-01-19 01:47:45,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:47:45,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702090542] [2022-01-19 01:47:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:47:45,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:47:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:47:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:47:45,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:47:45,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702090542] [2022-01-19 01:47:45,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702090542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:47:45,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466520791] [2022-01-19 01:47:45,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 01:47:45,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:47:45,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:47:45,233 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:47:45,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-19 01:47:45,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 01:47:45,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:47:45,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 01:47:45,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:47:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:47:45,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:47:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:47:46,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466520791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:47:46,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:47:46,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 01:47:46,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540881075] [2022-01-19 01:47:46,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:47:46,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 01:47:46,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:47:46,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 01:47:46,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 01:47:46,408 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:47:46,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1313 places, 2334 transitions, 87142 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:46,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:47:46,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:47:46,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:47:55,524 INFO L129 PetriNetUnfolder]: 2151/7075 cut-off events. [2022-01-19 01:47:55,524 INFO L130 PetriNetUnfolder]: For 645822/645835 co-relation queries the response was YES. [2022-01-19 01:47:55,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91690 conditions, 7075 events. 2151/7075 cut-off events. For 645822/645835 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 75459 event pairs, 139 based on Foata normal form. 12/7054 useless extension candidates. Maximal degree in co-relation 91457. Up to 1230 conditions per place. [2022-01-19 01:47:55,671 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 711 selfloop transitions, 1704 changer transitions 12/2470 dead transitions. [2022-01-19 01:47:55,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1428 places, 2470 transitions, 95922 flow [2022-01-19 01:47:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-19 01:47:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2022-01-19 01:47:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 6759 transitions. [2022-01-19 01:47:55,675 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6224903297108123 [2022-01-19 01:47:55,675 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 6759 transitions. [2022-01-19 01:47:55,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 6759 transitions. [2022-01-19 01:47:55,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:47:55,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 6759 transitions. [2022-01-19 01:47:55,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 55.40163934426229) internal successors, (6759), 122 states have internal predecessors, (6759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:55,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 89.0) internal successors, (10947), 123 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:55,685 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 89.0) internal successors, (10947), 123 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:55,685 INFO L186 Difference]: Start difference. First operand has 1313 places, 2334 transitions, 87142 flow. Second operand 122 states and 6759 transitions. [2022-01-19 01:47:55,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1428 places, 2470 transitions, 95922 flow [2022-01-19 01:48:00,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1362 places, 2470 transitions, 93248 flow, removed 147 selfloop flow, removed 66 redundant places. [2022-01-19 01:48:00,503 INFO L242 Difference]: Finished difference. Result has 1374 places, 2347 transitions, 89009 flow [2022-01-19 01:48:00,505 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=84519, PETRI_DIFFERENCE_MINUEND_PLACES=1241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1691, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=89009, PETRI_PLACES=1374, PETRI_TRANSITIONS=2347} [2022-01-19 01:48:00,505 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1295 predicate places. [2022-01-19 01:48:00,506 INFO L470 AbstractCegarLoop]: Abstraction has has 1374 places, 2347 transitions, 89009 flow [2022-01-19 01:48:00,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:00,506 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:48:00,506 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:48:00,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-19 01:48:00,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-19 01:48:00,710 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:48:00,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:48:00,710 INFO L85 PathProgramCache]: Analyzing trace with hash -470435579, now seen corresponding path program 25 times [2022-01-19 01:48:00,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:48:00,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895060294] [2022-01-19 01:48:00,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:48:00,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:48:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:48:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:48:00,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:48:00,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895060294] [2022-01-19 01:48:00,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895060294] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:48:00,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295692403] [2022-01-19 01:48:00,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 01:48:00,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:48:00,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:48:00,902 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:48:00,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-19 01:48:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:48:00,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 01:48:00,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:48:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:48:01,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:48:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:48:02,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295692403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:48:02,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:48:02,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 01:48:02,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783856852] [2022-01-19 01:48:02,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:48:02,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 01:48:02,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:48:02,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 01:48:02,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1858, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 01:48:02,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:48:02,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1374 places, 2347 transitions, 89009 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:02,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:48:02,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:48:02,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:48:14,923 INFO L129 PetriNetUnfolder]: 2380/7869 cut-off events. [2022-01-19 01:48:14,923 INFO L130 PetriNetUnfolder]: For 732078/732091 co-relation queries the response was YES. [2022-01-19 01:48:15,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103271 conditions, 7869 events. 2380/7869 cut-off events. For 732078/732091 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 85575 event pairs, 97 based on Foata normal form. 12/7874 useless extension candidates. Maximal degree in co-relation 103039. Up to 1032 conditions per place. [2022-01-19 01:48:15,092 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 660 selfloop transitions, 2106 changer transitions 12/2821 dead transitions. [2022-01-19 01:48:15,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1535 places, 2821 transitions, 111202 flow [2022-01-19 01:48:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-01-19 01:48:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2022-01-19 01:48:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 9368 transitions. [2022-01-19 01:48:15,097 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6265382557517389 [2022-01-19 01:48:15,097 INFO L72 ComplementDD]: Start complementDD. Operand 168 states and 9368 transitions. [2022-01-19 01:48:15,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 168 states and 9368 transitions. [2022-01-19 01:48:15,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:48:15,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 168 states and 9368 transitions. [2022-01-19 01:48:15,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 169 states, 168 states have (on average 55.76190476190476) internal successors, (9368), 168 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:15,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:15,111 INFO L81 ComplementDD]: Finished complementDD. Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:15,111 INFO L186 Difference]: Start difference. First operand has 1374 places, 2347 transitions, 89009 flow. Second operand 168 states and 9368 transitions. [2022-01-19 01:48:15,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1535 places, 2821 transitions, 111202 flow [2022-01-19 01:48:20,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1450 places, 2821 transitions, 107401 flow, removed 101 selfloop flow, removed 85 redundant places. [2022-01-19 01:48:20,830 INFO L242 Difference]: Finished difference. Result has 1476 places, 2598 transitions, 101364 flow [2022-01-19 01:48:20,832 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=85631, PETRI_DIFFERENCE_MINUEND_PLACES=1283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1867, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=168, PETRI_FLOW=101364, PETRI_PLACES=1476, PETRI_TRANSITIONS=2598} [2022-01-19 01:48:20,832 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1397 predicate places. [2022-01-19 01:48:20,832 INFO L470 AbstractCegarLoop]: Abstraction has has 1476 places, 2598 transitions, 101364 flow [2022-01-19 01:48:20,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:20,832 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:48:20,832 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:48:20,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-19 01:48:21,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-19 01:48:21,033 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:48:21,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:48:21,033 INFO L85 PathProgramCache]: Analyzing trace with hash -865746973, now seen corresponding path program 26 times [2022-01-19 01:48:21,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:48:21,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330703919] [2022-01-19 01:48:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:48:21,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:48:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:48:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:48:21,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:48:21,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330703919] [2022-01-19 01:48:21,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330703919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:48:21,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518608786] [2022-01-19 01:48:21,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:48:21,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:48:21,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:48:21,268 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:48:21,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-19 01:48:21,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:48:21,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:48:21,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 01:48:21,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:48:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:48:21,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:48:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:48:22,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518608786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:48:22,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:48:22,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 01:48:22,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399259536] [2022-01-19 01:48:22,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:48:22,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 01:48:22,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:48:22,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 01:48:22,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1869, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 01:48:22,527 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:48:22,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1476 places, 2598 transitions, 101364 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:22,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:48:22,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:48:22,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:48:45,067 INFO L129 PetriNetUnfolder]: 3024/9802 cut-off events. [2022-01-19 01:48:45,068 INFO L130 PetriNetUnfolder]: For 1014555/1014568 co-relation queries the response was YES. [2022-01-19 01:48:45,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134214 conditions, 9802 events. 3024/9802 cut-off events. For 1014555/1014568 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 110256 event pairs, 88 based on Foata normal form. 12/9805 useless extension candidates. Maximal degree in co-relation 133969. Up to 1327 conditions per place. [2022-01-19 01:48:45,332 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 583 selfloop transitions, 2939 changer transitions 14/3579 dead transitions. [2022-01-19 01:48:45,332 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1741 places, 3579 transitions, 144232 flow [2022-01-19 01:48:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2022-01-19 01:48:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2022-01-19 01:48:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 15150 transitions. [2022-01-19 01:48:45,342 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6258261731658956 [2022-01-19 01:48:45,342 INFO L72 ComplementDD]: Start complementDD. Operand 272 states and 15150 transitions. [2022-01-19 01:48:45,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 272 states and 15150 transitions. [2022-01-19 01:48:45,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:48:45,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 272 states and 15150 transitions. [2022-01-19 01:48:45,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 273 states, 272 states have (on average 55.6985294117647) internal successors, (15150), 272 states have internal predecessors, (15150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:45,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 273 states, 273 states have (on average 89.0) internal successors, (24297), 273 states have internal predecessors, (24297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:45,367 INFO L81 ComplementDD]: Finished complementDD. Result has 273 states, 273 states have (on average 89.0) internal successors, (24297), 273 states have internal predecessors, (24297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:45,368 INFO L186 Difference]: Start difference. First operand has 1476 places, 2598 transitions, 101364 flow. Second operand 272 states and 15150 transitions. [2022-01-19 01:48:45,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1741 places, 3579 transitions, 144232 flow [2022-01-19 01:48:53,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1673 places, 3579 transitions, 142131 flow, removed 702 selfloop flow, removed 68 redundant places. [2022-01-19 01:48:53,930 INFO L242 Difference]: Finished difference. Result has 1721 places, 3260 transitions, 135806 flow [2022-01-19 01:48:53,932 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=99784, PETRI_DIFFERENCE_MINUEND_PLACES=1402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=272, PETRI_FLOW=135806, PETRI_PLACES=1721, PETRI_TRANSITIONS=3260} [2022-01-19 01:48:53,932 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1642 predicate places. [2022-01-19 01:48:53,932 INFO L470 AbstractCegarLoop]: Abstraction has has 1721 places, 3260 transitions, 135806 flow [2022-01-19 01:48:53,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:53,932 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:48:53,932 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:48:53,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-19 01:48:54,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:48:54,147 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:48:54,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:48:54,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1977331653, now seen corresponding path program 2 times [2022-01-19 01:48:54,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:48:54,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367495344] [2022-01-19 01:48:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:48:54,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:48:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:48:54,325 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 01:48:54,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:48:54,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367495344] [2022-01-19 01:48:54,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367495344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:48:54,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285976850] [2022-01-19 01:48:54,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:48:54,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:48:54,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:48:54,327 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:48:54,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-19 01:48:54,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:48:54,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:48:54,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 01:48:54,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:48:54,761 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 01:48:54,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:48:55,109 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 01:48:55,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285976850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:48:55,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:48:55,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-01-19 01:48:55,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165308573] [2022-01-19 01:48:55,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:48:55,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 01:48:55,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:48:55,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 01:48:55,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 01:48:55,111 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-01-19 01:48:55,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1721 places, 3260 transitions, 135806 flow. Second operand has 38 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:55,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:48:55,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-01-19 01:48:55,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:49:08,052 INFO L129 PetriNetUnfolder]: 3492/10806 cut-off events. [2022-01-19 01:49:08,052 INFO L130 PetriNetUnfolder]: For 1405621/1405634 co-relation queries the response was YES. [2022-01-19 01:49:08,258 INFO L84 FinitePrefix]: Finished finitePrefix Result has 157020 conditions, 10806 events. 3492/10806 cut-off events. For 1405621/1405634 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 121271 event pairs, 512 based on Foata normal form. 16/10778 useless extension candidates. Maximal degree in co-relation 156734. Up to 3866 conditions per place. [2022-01-19 01:49:08,330 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1378 selfloop transitions, 2048 changer transitions 32/3499 dead transitions. [2022-01-19 01:49:08,331 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1796 places, 3499 transitions, 152106 flow [2022-01-19 01:49:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-19 01:49:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-01-19 01:49:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 4518 transitions. [2022-01-19 01:49:08,333 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.619073718827076 [2022-01-19 01:49:08,333 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 4518 transitions. [2022-01-19 01:49:08,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 4518 transitions. [2022-01-19 01:49:08,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:49:08,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 4518 transitions. [2022-01-19 01:49:08,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 55.09756097560975) internal successors, (4518), 82 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:08,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 89.0) internal successors, (7387), 83 states have internal predecessors, (7387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:08,395 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 89.0) internal successors, (7387), 83 states have internal predecessors, (7387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:08,395 INFO L186 Difference]: Start difference. First operand has 1721 places, 3260 transitions, 135806 flow. Second operand 82 states and 4518 transitions. [2022-01-19 01:49:08,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1796 places, 3499 transitions, 152106 flow [2022-01-19 01:49:22,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1714 places, 3499 transitions, 148068 flow, removed 1563 selfloop flow, removed 82 redundant places. [2022-01-19 01:49:22,440 INFO L242 Difference]: Finished difference. Result has 1733 places, 3368 transitions, 142543 flow [2022-01-19 01:49:22,442 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=132041, PETRI_DIFFERENCE_MINUEND_PLACES=1633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1934, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=142543, PETRI_PLACES=1733, PETRI_TRANSITIONS=3368} [2022-01-19 01:49:22,442 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1654 predicate places. [2022-01-19 01:49:22,442 INFO L470 AbstractCegarLoop]: Abstraction has has 1733 places, 3368 transitions, 142543 flow [2022-01-19 01:49:22,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:22,442 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:49:22,442 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:49:22,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-19 01:49:22,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:49:22,643 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:49:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:49:22,643 INFO L85 PathProgramCache]: Analyzing trace with hash 997651439, now seen corresponding path program 3 times [2022-01-19 01:49:22,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:49:22,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315252731] [2022-01-19 01:49:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:49:22,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:49:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:49:22,809 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 01:49:22,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:49:22,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315252731] [2022-01-19 01:49:22,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315252731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:49:22,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996280003] [2022-01-19 01:49:22,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:49:22,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:49:22,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:49:22,811 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:49:22,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-19 01:49:22,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 01:49:22,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:49:22,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 01:49:22,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:49:23,251 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 01:49:23,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:49:23,642 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 01:49:23,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996280003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:49:23,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:49:23,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-01-19 01:49:23,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529514152] [2022-01-19 01:49:23,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:49:23,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 01:49:23,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:49:23,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 01:49:23,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 01:49:23,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-01-19 01:49:23,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1733 places, 3368 transitions, 142543 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:23,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:49:23,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-01-19 01:49:23,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:49:37,565 INFO L129 PetriNetUnfolder]: 3495/10779 cut-off events. [2022-01-19 01:49:37,565 INFO L130 PetriNetUnfolder]: For 1454752/1454765 co-relation queries the response was YES. [2022-01-19 01:49:37,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160484 conditions, 10779 events. 3495/10779 cut-off events. For 1454752/1454765 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 120764 event pairs, 480 based on Foata normal form. 20/10765 useless extension candidates. Maximal degree in co-relation 160191. Up to 3876 conditions per place. [2022-01-19 01:49:37,851 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1310 selfloop transitions, 2118 changer transitions 42/3511 dead transitions. [2022-01-19 01:49:37,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1800 places, 3511 transitions, 153571 flow [2022-01-19 01:49:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-19 01:49:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-01-19 01:49:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4631 transitions. [2022-01-19 01:49:37,853 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6194489031567684 [2022-01-19 01:49:37,853 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4631 transitions. [2022-01-19 01:49:37,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4631 transitions. [2022-01-19 01:49:37,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:49:37,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4631 transitions. [2022-01-19 01:49:37,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 55.13095238095238) internal successors, (4631), 84 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:37,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 89.0) internal successors, (7565), 85 states have internal predecessors, (7565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:37,860 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 89.0) internal successors, (7565), 85 states have internal predecessors, (7565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:37,860 INFO L186 Difference]: Start difference. First operand has 1733 places, 3368 transitions, 142543 flow. Second operand 84 states and 4631 transitions. [2022-01-19 01:49:37,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1800 places, 3511 transitions, 153571 flow [2022-01-19 01:49:51,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1751 places, 3511 transitions, 151568 flow, removed 189 selfloop flow, removed 49 redundant places. [2022-01-19 01:49:51,432 INFO L242 Difference]: Finished difference. Result has 1765 places, 3366 transitions, 145374 flow [2022-01-19 01:49:51,434 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=140816, PETRI_DIFFERENCE_MINUEND_PLACES=1668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2097, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=145374, PETRI_PLACES=1765, PETRI_TRANSITIONS=3366} [2022-01-19 01:49:51,435 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1686 predicate places. [2022-01-19 01:49:51,435 INFO L470 AbstractCegarLoop]: Abstraction has has 1765 places, 3366 transitions, 145374 flow [2022-01-19 01:49:51,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:51,435 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:49:51,435 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:49:51,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-19 01:49:51,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:49:51,636 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:49:51,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:49:51,636 INFO L85 PathProgramCache]: Analyzing trace with hash -30717033, now seen corresponding path program 4 times [2022-01-19 01:49:51,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:49:51,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588120999] [2022-01-19 01:49:51,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:49:51,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:49:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:49:51,815 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 01:49:51,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:49:51,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588120999] [2022-01-19 01:49:51,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588120999] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:49:51,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452462030] [2022-01-19 01:49:51,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 01:49:51,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:49:51,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:49:51,816 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:49:51,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-19 01:49:51,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 01:49:51,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:49:51,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 01:49:51,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:49:52,263 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 01:49:52,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:49:52,659 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 01:49:52,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452462030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:49:52,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:49:52,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-01-19 01:49:52,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568481422] [2022-01-19 01:49:52,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:49:52,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 01:49:52,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:49:52,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 01:49:52,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 01:49:52,661 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-01-19 01:49:52,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1765 places, 3366 transitions, 145374 flow. Second operand has 38 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:52,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:49:52,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-01-19 01:49:52,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:50:09,731 INFO L129 PetriNetUnfolder]: 4103/12122 cut-off events. [2022-01-19 01:50:09,731 INFO L130 PetriNetUnfolder]: For 1723040/1723053 co-relation queries the response was YES. [2022-01-19 01:50:09,979 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190381 conditions, 12122 events. 4103/12122 cut-off events. For 1723040/1723053 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 135746 event pairs, 327 based on Foata normal form. 69/12160 useless extension candidates. Maximal degree in co-relation 190087. Up to 2986 conditions per place. [2022-01-19 01:50:10,071 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1299 selfloop transitions, 3130 changer transitions 70/4540 dead transitions. [2022-01-19 01:50:10,071 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1873 places, 4540 transitions, 203405 flow [2022-01-19 01:50:10,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-19 01:50:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2022-01-19 01:50:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 7481 transitions. [2022-01-19 01:50:10,074 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6180601454064772 [2022-01-19 01:50:10,074 INFO L72 ComplementDD]: Start complementDD. Operand 136 states and 7481 transitions. [2022-01-19 01:50:10,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 136 states and 7481 transitions. [2022-01-19 01:50:10,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:50:10,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 136 states and 7481 transitions. [2022-01-19 01:50:10,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 137 states, 136 states have (on average 55.00735294117647) internal successors, (7481), 136 states have internal predecessors, (7481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:50:10,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 137 states, 137 states have (on average 89.0) internal successors, (12193), 137 states have internal predecessors, (12193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:50:10,085 INFO L81 ComplementDD]: Finished complementDD. Result has 137 states, 137 states have (on average 89.0) internal successors, (12193), 137 states have internal predecessors, (12193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:50:10,085 INFO L186 Difference]: Start difference. First operand has 1765 places, 3366 transitions, 145374 flow. Second operand 136 states and 7481 transitions. [2022-01-19 01:50:10,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1873 places, 4540 transitions, 203405 flow [2022-01-19 01:50:27,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1805 places, 4540 transitions, 197834 flow, removed 127 selfloop flow, removed 68 redundant places. [2022-01-19 01:50:27,390 INFO L242 Difference]: Finished difference. Result has 1836 places, 4131 transitions, 186190 flow [2022-01-19 01:50:27,393 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=141077, PETRI_DIFFERENCE_MINUEND_PLACES=1670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=883, PETRI_DIFFERENCE_SUBTRAHEND_STATES=136, PETRI_FLOW=186190, PETRI_PLACES=1836, PETRI_TRANSITIONS=4131} [2022-01-19 01:50:27,393 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1757 predicate places. [2022-01-19 01:50:27,393 INFO L470 AbstractCegarLoop]: Abstraction has has 1836 places, 4131 transitions, 186190 flow [2022-01-19 01:50:27,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:50:27,394 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:50:27,394 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:50:27,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-19 01:50:27,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-19 01:50:27,594 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:50:27,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:50:27,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1638313843, now seen corresponding path program 5 times [2022-01-19 01:50:27,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:50:27,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110394648] [2022-01-19 01:50:27,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:50:27,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:50:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:50:27,773 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 01:50:27,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:50:27,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110394648] [2022-01-19 01:50:27,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110394648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:50:27,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295706568] [2022-01-19 01:50:27,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 01:50:27,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:50:27,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:50:27,774 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:50:27,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-19 01:50:27,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 01:50:27,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:50:27,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 01:50:27,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:50:28,226 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 01:50:28,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:50:28,592 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 01:50:28,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295706568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:50:28,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:50:28,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-01-19 01:50:28,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418091387] [2022-01-19 01:50:28,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:50:28,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 01:50:28,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:50:28,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 01:50:28,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 01:50:28,594 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-01-19 01:50:28,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1836 places, 4131 transitions, 186190 flow. Second operand has 38 states, 38 states have (on average 52.578947368421055) internal successors, (1998), 38 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:50:28,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:50:28,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-01-19 01:50:28,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:50:49,579 INFO L129 PetriNetUnfolder]: 4122/12159 cut-off events. [2022-01-19 01:50:49,579 INFO L130 PetriNetUnfolder]: For 2036452/2036465 co-relation queries the response was YES. [2022-01-19 01:50:49,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 204849 conditions, 12159 events. 4122/12159 cut-off events. For 2036452/2036465 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 135225 event pairs, 427 based on Foata normal form. 62/12185 useless extension candidates. Maximal degree in co-relation 204535. Up to 2546 conditions per place. [2022-01-19 01:50:50,040 INFO L132 encePairwiseOnDemand]: 71/89 looper letters, 2142 selfloop transitions, 2290 changer transitions 32/4505 dead transitions. [2022-01-19 01:50:50,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1913 places, 4505 transitions, 209546 flow [2022-01-19 01:50:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-19 01:50:50,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-01-19 01:50:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5041 transitions. [2022-01-19 01:50:50,043 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6224225212989258 [2022-01-19 01:50:50,043 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5041 transitions. [2022-01-19 01:50:50,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5041 transitions. [2022-01-19 01:50:50,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:50:50,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5041 transitions. [2022-01-19 01:50:50,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 55.395604395604394) internal successors, (5041), 91 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:50:50,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:50:50,050 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:50:50,050 INFO L186 Difference]: Start difference. First operand has 1836 places, 4131 transitions, 186190 flow. Second operand 91 states and 5041 transitions. [2022-01-19 01:50:50,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1913 places, 4505 transitions, 209546 flow [2022-01-19 01:51:12,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1845 places, 4505 transitions, 203557 flow, removed 1099 selfloop flow, removed 68 redundant places. [2022-01-19 01:51:12,233 INFO L242 Difference]: Finished difference. Result has 1866 places, 4227 transitions, 193294 flow [2022-01-19 01:51:12,236 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=179695, PETRI_DIFFERENCE_MINUEND_PLACES=1755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1899, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=193294, PETRI_PLACES=1866, PETRI_TRANSITIONS=4227} [2022-01-19 01:51:12,236 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1787 predicate places. [2022-01-19 01:51:12,236 INFO L470 AbstractCegarLoop]: Abstraction has has 1866 places, 4227 transitions, 193294 flow [2022-01-19 01:51:12,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.578947368421055) internal successors, (1998), 38 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:51:12,237 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:51:12,237 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:51:12,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-19 01:51:12,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-19 01:51:12,452 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:51:12,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:51:12,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1335438405, now seen corresponding path program 6 times [2022-01-19 01:51:12,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:51:12,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833467586] [2022-01-19 01:51:12,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:51:12,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:51:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:51:12,638 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 01:51:12,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:51:12,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833467586] [2022-01-19 01:51:12,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833467586] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:51:12,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037876052] [2022-01-19 01:51:12,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 01:51:12,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:51:12,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:51:12,641 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:51:12,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-19 01:51:12,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 01:51:12,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:51:12,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 01:51:12,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:51:13,107 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 01:51:13,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:51:13,511 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 01:51:13,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037876052] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:51:13,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:51:13,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-01-19 01:51:13,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225201144] [2022-01-19 01:51:13,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:51:13,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 01:51:13,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:51:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 01:51:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 01:51:13,513 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-01-19 01:51:13,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1866 places, 4227 transitions, 193294 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:51:13,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:51:13,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-01-19 01:51:13,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:51:36,069 INFO L129 PetriNetUnfolder]: 4159/12175 cut-off events. [2022-01-19 01:51:36,069 INFO L130 PetriNetUnfolder]: For 2073529/2073542 co-relation queries the response was YES. [2022-01-19 01:51:36,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203772 conditions, 12175 events. 4159/12175 cut-off events. For 2073529/2073542 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 135141 event pairs, 381 based on Foata normal form. 20/12162 useless extension candidates. Maximal degree in co-relation 203449. Up to 2727 conditions per place. [2022-01-19 01:51:36,531 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1283 selfloop transitions, 3398 changer transitions 27/4749 dead transitions. [2022-01-19 01:51:36,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2007 places, 4749 transitions, 220714 flow [2022-01-19 01:51:36,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-19 01:51:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2022-01-19 01:51:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 8131 transitions. [2022-01-19 01:51:36,535 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6172942605526875 [2022-01-19 01:51:36,535 INFO L72 ComplementDD]: Start complementDD. Operand 148 states and 8131 transitions. [2022-01-19 01:51:36,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 148 states and 8131 transitions. [2022-01-19 01:51:36,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:51:36,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 148 states and 8131 transitions. [2022-01-19 01:51:36,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 149 states, 148 states have (on average 54.939189189189186) internal successors, (8131), 148 states have internal predecessors, (8131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:51:36,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 149 states, 149 states have (on average 89.0) internal successors, (13261), 149 states have internal predecessors, (13261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:51:36,547 INFO L81 ComplementDD]: Finished complementDD. Result has 149 states, 149 states have (on average 89.0) internal successors, (13261), 149 states have internal predecessors, (13261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:51:36,547 INFO L186 Difference]: Start difference. First operand has 1866 places, 4227 transitions, 193294 flow. Second operand 148 states and 8131 transitions. [2022-01-19 01:51:36,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2007 places, 4749 transitions, 220714 flow [2022-01-19 01:51:59,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1956 places, 4749 transitions, 218423 flow, removed 516 selfloop flow, removed 51 redundant places. [2022-01-19 01:51:59,536 INFO L242 Difference]: Finished difference. Result has 1971 places, 4369 transitions, 205779 flow [2022-01-19 01:51:59,539 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=191193, PETRI_DIFFERENCE_MINUEND_PLACES=1809, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=956, PETRI_DIFFERENCE_SUBTRAHEND_STATES=148, PETRI_FLOW=205779, PETRI_PLACES=1971, PETRI_TRANSITIONS=4369} [2022-01-19 01:51:59,539 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1892 predicate places. [2022-01-19 01:51:59,539 INFO L470 AbstractCegarLoop]: Abstraction has has 1971 places, 4369 transitions, 205779 flow [2022-01-19 01:51:59,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:51:59,540 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:51:59,540 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:51:59,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-19 01:51:59,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-19 01:51:59,755 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:51:59,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:51:59,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1262583333, now seen corresponding path program 27 times [2022-01-19 01:51:59,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:51:59,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289986710] [2022-01-19 01:51:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:51:59,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:51:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:51:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:51:59,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:51:59,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289986710] [2022-01-19 01:51:59,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289986710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:51:59,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496147232] [2022-01-19 01:51:59,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:51:59,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:51:59,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:51:59,964 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:51:59,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-19 01:52:00,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 01:52:00,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:52:00,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 01:52:00,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:52:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:52:00,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:52:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:52:01,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496147232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:52:01,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:52:01,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 01:52:01,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10796617] [2022-01-19 01:52:01,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:52:01,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 01:52:01,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:52:01,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 01:52:01,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1865, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 01:52:01,222 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:52:01,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1971 places, 4369 transitions, 205779 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:52:01,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:52:01,223 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:52:01,223 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:52:25,300 INFO L129 PetriNetUnfolder]: 4411/12980 cut-off events. [2022-01-19 01:52:25,300 INFO L130 PetriNetUnfolder]: For 2395359/2395464 co-relation queries the response was YES. [2022-01-19 01:52:25,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229195 conditions, 12980 events. 4411/12980 cut-off events. For 2395359/2395464 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 146099 event pairs, 300 based on Foata normal form. 29/12938 useless extension candidates. Maximal degree in co-relation 228863. Up to 4093 conditions per place. [2022-01-19 01:52:25,736 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 1816 selfloop transitions, 3296 changer transitions 12/5194 dead transitions. [2022-01-19 01:52:25,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2043 places, 5194 transitions, 257080 flow [2022-01-19 01:52:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-19 01:52:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2022-01-19 01:52:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 4929 transitions. [2022-01-19 01:52:25,739 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6222699154147203 [2022-01-19 01:52:25,739 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 4929 transitions. [2022-01-19 01:52:25,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 4929 transitions. [2022-01-19 01:52:25,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:52:25,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 4929 transitions. [2022-01-19 01:52:25,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 55.38202247191011) internal successors, (4929), 89 states have internal predecessors, (4929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:52:25,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 89.0) internal successors, (8010), 90 states have internal predecessors, (8010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:52:25,746 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 89.0) internal successors, (8010), 90 states have internal predecessors, (8010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:52:25,746 INFO L186 Difference]: Start difference. First operand has 1971 places, 4369 transitions, 205779 flow. Second operand 89 states and 4929 transitions. [2022-01-19 01:52:25,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2043 places, 5194 transitions, 257080 flow [2022-01-19 01:52:54,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1939 places, 5194 transitions, 250094 flow, removed 1492 selfloop flow, removed 104 redundant places. [2022-01-19 01:52:54,984 INFO L242 Difference]: Finished difference. Result has 1965 places, 4972 transitions, 242580 flow [2022-01-19 01:52:54,987 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=201235, PETRI_DIFFERENCE_MINUEND_PLACES=1851, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2728, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=242580, PETRI_PLACES=1965, PETRI_TRANSITIONS=4972} [2022-01-19 01:52:54,988 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1886 predicate places. [2022-01-19 01:52:54,988 INFO L470 AbstractCegarLoop]: Abstraction has has 1965 places, 4972 transitions, 242580 flow [2022-01-19 01:52:54,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:52:54,988 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:52:54,988 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:52:55,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-19 01:52:55,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-19 01:52:55,191 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:52:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:52:55,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1469046577, now seen corresponding path program 28 times [2022-01-19 01:52:55,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:52:55,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403448304] [2022-01-19 01:52:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:52:55,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:52:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:52:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:52:55,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:52:55,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403448304] [2022-01-19 01:52:55,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403448304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:52:55,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908252554] [2022-01-19 01:52:55,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 01:52:55,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:52:55,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:52:55,392 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:52:55,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-19 01:52:55,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 01:52:55,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:52:55,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 01:52:55,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:52:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:52:56,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:52:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:52:56,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908252554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:52:56,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:52:56,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 01:52:56,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201761453] [2022-01-19 01:52:56,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:52:56,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 01:52:56,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:52:56,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 01:52:56,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 01:52:56,611 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:52:56,612 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1965 places, 4972 transitions, 242580 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:52:56,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:52:56,612 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:52:56,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:53:25,842 INFO L129 PetriNetUnfolder]: 4671/13630 cut-off events. [2022-01-19 01:53:25,842 INFO L130 PetriNetUnfolder]: For 2186505/2186655 co-relation queries the response was YES. [2022-01-19 01:53:26,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237628 conditions, 13630 events. 4671/13630 cut-off events. For 2186505/2186655 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 154142 event pairs, 326 based on Foata normal form. 40/13596 useless extension candidates. Maximal degree in co-relation 237283. Up to 4114 conditions per place. [2022-01-19 01:53:26,387 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 1695 selfloop transitions, 3815 changer transitions 12/5592 dead transitions. [2022-01-19 01:53:26,387 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2097 places, 5592 transitions, 283425 flow [2022-01-19 01:53:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-19 01:53:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2022-01-19 01:53:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 7661 transitions. [2022-01-19 01:53:26,391 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6192708754344839 [2022-01-19 01:53:26,391 INFO L72 ComplementDD]: Start complementDD. Operand 139 states and 7661 transitions. [2022-01-19 01:53:26,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 7661 transitions. [2022-01-19 01:53:26,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:53:26,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 139 states and 7661 transitions. [2022-01-19 01:53:26,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 140 states, 139 states have (on average 55.115107913669064) internal successors, (7661), 139 states have internal predecessors, (7661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:53:26,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 140 states, 140 states have (on average 89.0) internal successors, (12460), 140 states have internal predecessors, (12460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:53:26,402 INFO L81 ComplementDD]: Finished complementDD. Result has 140 states, 140 states have (on average 89.0) internal successors, (12460), 140 states have internal predecessors, (12460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:53:26,402 INFO L186 Difference]: Start difference. First operand has 1965 places, 4972 transitions, 242580 flow. Second operand 139 states and 7661 transitions. [2022-01-19 01:53:26,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2097 places, 5592 transitions, 283425 flow [2022-01-19 01:53:59,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2074 places, 5592 transitions, 282059 flow, removed 382 selfloop flow, removed 23 redundant places. [2022-01-19 01:53:59,887 INFO L242 Difference]: Finished difference. Result has 2098 places, 5402 transitions, 277264 flow [2022-01-19 01:53:59,891 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=241523, PETRI_DIFFERENCE_MINUEND_PLACES=1936, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=139, PETRI_FLOW=277264, PETRI_PLACES=2098, PETRI_TRANSITIONS=5402} [2022-01-19 01:53:59,891 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 2019 predicate places. [2022-01-19 01:53:59,891 INFO L470 AbstractCegarLoop]: Abstraction has has 2098 places, 5402 transitions, 277264 flow [2022-01-19 01:53:59,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:53:59,892 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:53:59,892 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:53:59,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-19 01:54:00,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:54:00,101 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:54:00,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:54:00,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1215521967, now seen corresponding path program 7 times [2022-01-19 01:54:00,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:54:00,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081005465] [2022-01-19 01:54:00,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:54:00,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:54:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:54:00,285 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 01:54:00,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:54:00,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081005465] [2022-01-19 01:54:00,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081005465] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:54:00,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256796159] [2022-01-19 01:54:00,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 01:54:00,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:54:00,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:54:00,286 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:54:00,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-19 01:54:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:54:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 01:54:00,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:54:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:54:00,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:54:01,153 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 01:54:01,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256796159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:54:01,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:54:01,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-01-19 01:54:01,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950416194] [2022-01-19 01:54:01,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:54:01,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 01:54:01,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:54:01,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 01:54:01,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 01:54:01,155 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-01-19 01:54:01,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2098 places, 5402 transitions, 277264 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:54:01,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:54:01,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-01-19 01:54:01,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:54:34,937 INFO L129 PetriNetUnfolder]: 4964/14181 cut-off events. [2022-01-19 01:54:34,937 INFO L130 PetriNetUnfolder]: For 2238735/2238757 co-relation queries the response was YES. [2022-01-19 01:54:35,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 247569 conditions, 14181 events. 4964/14181 cut-off events. For 2238735/2238757 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 159739 event pairs, 763 based on Foata normal form. 14/14133 useless extension candidates. Maximal degree in co-relation 247208. Up to 7242 conditions per place. [2022-01-19 01:54:35,484 INFO L132 encePairwiseOnDemand]: 71/89 looper letters, 2296 selfloop transitions, 3213 changer transitions 12/5562 dead transitions. [2022-01-19 01:54:35,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2159 places, 5562 transitions, 293350 flow [2022-01-19 01:54:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-19 01:54:35,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-01-19 01:54:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3727 transitions. [2022-01-19 01:54:35,486 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6158294778585591 [2022-01-19 01:54:35,486 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3727 transitions. [2022-01-19 01:54:35,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3727 transitions. [2022-01-19 01:54:35,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:54:35,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3727 transitions. [2022-01-19 01:54:35,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 54.80882352941177) internal successors, (3727), 68 states have internal predecessors, (3727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:54:35,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 89.0) internal successors, (6141), 69 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:54:35,492 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 89.0) internal successors, (6141), 69 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:54:35,492 INFO L186 Difference]: Start difference. First operand has 2098 places, 5402 transitions, 277264 flow. Second operand 68 states and 3727 transitions. [2022-01-19 01:54:35,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2159 places, 5562 transitions, 293350 flow [2022-01-19 01:55:11,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2095 places, 5562 transitions, 291719 flow, removed 143 selfloop flow, removed 64 redundant places. [2022-01-19 01:55:11,913 INFO L242 Difference]: Finished difference. Result has 2122 places, 5478 transitions, 289584 flow [2022-01-19 01:55:11,916 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=275652, PETRI_DIFFERENCE_MINUEND_PLACES=2028, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=289584, PETRI_PLACES=2122, PETRI_TRANSITIONS=5478} [2022-01-19 01:55:11,916 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 2043 predicate places. [2022-01-19 01:55:11,917 INFO L470 AbstractCegarLoop]: Abstraction has has 2122 places, 5478 transitions, 289584 flow [2022-01-19 01:55:11,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:55:11,917 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:55:11,917 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:55:11,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-19 01:55:12,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-19 01:55:12,133 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:55:12,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:55:12,133 INFO L85 PathProgramCache]: Analyzing trace with hash -221004031, now seen corresponding path program 29 times [2022-01-19 01:55:12,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:55:12,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108390079] [2022-01-19 01:55:12,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:55:12,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:55:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:55:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:55:12,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:55:12,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108390079] [2022-01-19 01:55:12,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108390079] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:55:12,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335499857] [2022-01-19 01:55:12,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 01:55:12,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:55:12,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:55:12,332 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:55:12,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-19 01:55:12,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 01:55:12,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:55:12,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 01:55:12,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:55:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:55:12,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:55:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:55:13,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335499857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:55:13,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:55:13,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 01:55:13,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241174860] [2022-01-19 01:55:13,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:55:13,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 01:55:13,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:55:13,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 01:55:13,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 01:55:13,596 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:55:13,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2122 places, 5478 transitions, 289584 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:55:13,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:55:13,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:55:13,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:55:49,139 INFO L129 PetriNetUnfolder]: 4712/13772 cut-off events. [2022-01-19 01:55:49,139 INFO L130 PetriNetUnfolder]: For 2428752/2428941 co-relation queries the response was YES. [2022-01-19 01:55:49,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 252397 conditions, 13772 events. 4712/13772 cut-off events. For 2428752/2428941 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 156080 event pairs, 266 based on Foata normal form. 54/13779 useless extension candidates. Maximal degree in co-relation 252019. Up to 4154 conditions per place. [2022-01-19 01:55:49,774 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 1598 selfloop transitions, 4007 changer transitions 12/5694 dead transitions. [2022-01-19 01:55:49,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2268 places, 5694 transitions, 307838 flow [2022-01-19 01:55:49,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-19 01:55:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2022-01-19 01:55:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 8432 transitions. [2022-01-19 01:55:49,779 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6192259675405742 [2022-01-19 01:55:49,779 INFO L72 ComplementDD]: Start complementDD. Operand 153 states and 8432 transitions. [2022-01-19 01:55:49,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 153 states and 8432 transitions. [2022-01-19 01:55:49,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:55:49,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 153 states and 8432 transitions. [2022-01-19 01:55:49,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 154 states, 153 states have (on average 55.111111111111114) internal successors, (8432), 153 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:55:49,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 154 states, 154 states have (on average 89.0) internal successors, (13706), 154 states have internal predecessors, (13706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:55:49,794 INFO L81 ComplementDD]: Finished complementDD. Result has 154 states, 154 states have (on average 89.0) internal successors, (13706), 154 states have internal predecessors, (13706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:55:49,794 INFO L186 Difference]: Start difference. First operand has 2122 places, 5478 transitions, 289584 flow. Second operand 153 states and 8432 transitions. [2022-01-19 01:55:49,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2268 places, 5694 transitions, 307838 flow [2022-01-19 01:56:30,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2236 places, 5694 transitions, 306373 flow, removed 293 selfloop flow, removed 32 redundant places. [2022-01-19 01:56:30,538 INFO L242 Difference]: Finished difference. Result has 2246 places, 5504 transitions, 299383 flow [2022-01-19 01:56:30,541 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=288182, PETRI_DIFFERENCE_MINUEND_PLACES=2084, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3981, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=153, PETRI_FLOW=299383, PETRI_PLACES=2246, PETRI_TRANSITIONS=5504} [2022-01-19 01:56:30,541 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 2167 predicate places. [2022-01-19 01:56:30,541 INFO L470 AbstractCegarLoop]: Abstraction has has 2246 places, 5504 transitions, 299383 flow [2022-01-19 01:56:30,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:56:30,542 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:56:30,542 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:56:30,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-19 01:56:30,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:56:30,742 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:56:30,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:56:30,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2076723501, now seen corresponding path program 30 times [2022-01-19 01:56:30,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:56:30,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416805233] [2022-01-19 01:56:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:56:30,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:56:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:56:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:56:30,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:56:30,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416805233] [2022-01-19 01:56:30,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416805233] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:56:30,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543494372] [2022-01-19 01:56:30,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 01:56:30,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:56:30,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:56:30,959 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:56:30,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-19 01:56:31,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 01:56:31,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:56:31,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 01:56:31,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:56:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:56:31,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:56:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:56:32,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543494372] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:56:32,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:56:32,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 01:56:32,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381509425] [2022-01-19 01:56:32,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:56:32,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 01:56:32,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:56:32,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 01:56:32,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 01:56:32,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:56:32,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2246 places, 5504 transitions, 299383 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:56:32,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:56:32,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:56:32,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:57:17,609 INFO L129 PetriNetUnfolder]: 5182/15091 cut-off events. [2022-01-19 01:57:17,609 INFO L130 PetriNetUnfolder]: For 2752184/2752351 co-relation queries the response was YES. [2022-01-19 01:57:18,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 282352 conditions, 15091 events. 5182/15091 cut-off events. For 2752184/2752351 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 173670 event pairs, 251 based on Foata normal form. 56/15109 useless extension candidates. Maximal degree in co-relation 281970. Up to 3077 conditions per place. [2022-01-19 01:57:18,273 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 1318 selfloop transitions, 4927 changer transitions 13/6335 dead transitions. [2022-01-19 01:57:18,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2421 places, 6335 transitions, 348845 flow [2022-01-19 01:57:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-01-19 01:57:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2022-01-19 01:57:18,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 10105 transitions. [2022-01-19 01:57:18,278 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6238424496851463 [2022-01-19 01:57:18,278 INFO L72 ComplementDD]: Start complementDD. Operand 182 states and 10105 transitions. [2022-01-19 01:57:18,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 182 states and 10105 transitions. [2022-01-19 01:57:18,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:57:18,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 182 states and 10105 transitions. [2022-01-19 01:57:18,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 183 states, 182 states have (on average 55.52197802197802) internal successors, (10105), 182 states have internal predecessors, (10105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:57:18,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 183 states, 183 states have (on average 89.0) internal successors, (16287), 183 states have internal predecessors, (16287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:57:18,294 INFO L81 ComplementDD]: Finished complementDD. Result has 183 states, 183 states have (on average 89.0) internal successors, (16287), 183 states have internal predecessors, (16287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:57:18,294 INFO L186 Difference]: Start difference. First operand has 2246 places, 5504 transitions, 299383 flow. Second operand 182 states and 10105 transitions. [2022-01-19 01:57:18,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2421 places, 6335 transitions, 348845 flow [2022-01-19 01:58:03,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2324 places, 6335 transitions, 345241 flow, removed 158 selfloop flow, removed 97 redundant places. [2022-01-19 01:58:03,512 INFO L242 Difference]: Finished difference. Result has 2354 places, 6060 transitions, 339895 flow [2022-01-19 01:58:03,515 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=296097, PETRI_DIFFERENCE_MINUEND_PLACES=2143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1008, PETRI_DIFFERENCE_SUBTRAHEND_STATES=182, PETRI_FLOW=339895, PETRI_PLACES=2354, PETRI_TRANSITIONS=6060} [2022-01-19 01:58:03,516 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 2275 predicate places. [2022-01-19 01:58:03,516 INFO L470 AbstractCegarLoop]: Abstraction has has 2354 places, 6060 transitions, 339895 flow [2022-01-19 01:58:03,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:58:03,516 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:58:03,516 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:58:03,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-19 01:58:03,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:58:03,719 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:58:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:58:03,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1393669951, now seen corresponding path program 31 times [2022-01-19 01:58:03,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:58:03,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953748752] [2022-01-19 01:58:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:58:03,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:58:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:58:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:58:03,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:58:03,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953748752] [2022-01-19 01:58:03,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953748752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:58:03,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022851532] [2022-01-19 01:58:03,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 01:58:03,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:58:03,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:58:03,931 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:58:03,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-19 01:58:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:58:03,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 01:58:03,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:58:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:58:04,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:58:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:58:05,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022851532] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:58:05,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:58:05,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 01:58:05,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957004592] [2022-01-19 01:58:05,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:58:05,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 01:58:05,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:58:05,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 01:58:05,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1866, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 01:58:05,201 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 01:58:05,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2354 places, 6060 transitions, 339895 flow. Second operand has 46 states, 46 states have (on average 53.630434782608695) internal successors, (2467), 46 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:58:05,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:58:05,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 01:58:05,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-01-19 01:58:42,074 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 01:58:42,117 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 01:58:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2022-01-19 01:58:42,312 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 01:58:42,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-19 01:58:42,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-19 01:58:42,513 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (46states, 52/89 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 185125 conditions, 8586 events (3187/8585 cut-off events. For 1636662/1636715 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 100522 event pairs, 84 based on Foata normal form. 17/9634 useless extension candidates. Maximal degree in co-relation 184720. Up to 1570 conditions per place.). [2022-01-19 01:58:42,514 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 01:58:42,514 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 01:58:42,517 INFO L732 BasicCegarLoop]: Path program histogram: [31, 7, 6, 1] [2022-01-19 01:58:42,518 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 01:58:42,518 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 01:58:42,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 01:58:42 BasicIcfg [2022-01-19 01:58:42,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 01:58:42,520 INFO L158 Benchmark]: Toolchain (without parser) took 811797.88ms. Allocated memory was 388.0MB in the beginning and 6.8GB in the end (delta: 6.4GB). Free memory was 332.9MB in the beginning and 3.7GB in the end (delta: -3.3GB). Peak memory consumption was 3.3GB. Max. memory is 16.0GB. [2022-01-19 01:58:42,520 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 388.0MB. Free memory is still 349.8MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 01:58:42,520 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.99ms. Allocated memory was 388.0MB in the beginning and 513.8MB in the end (delta: 125.8MB). Free memory was 332.7MB in the beginning and 485.7MB in the end (delta: -152.9MB). Peak memory consumption was 8.7MB. Max. memory is 16.0GB. [2022-01-19 01:58:42,520 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.29ms. Allocated memory is still 513.8MB. Free memory was 485.7MB in the beginning and 483.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 01:58:42,520 INFO L158 Benchmark]: Boogie Preprocessor took 20.23ms. Allocated memory is still 513.8MB. Free memory was 483.6MB in the beginning and 482.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 01:58:42,520 INFO L158 Benchmark]: RCFGBuilder took 256.06ms. Allocated memory is still 513.8MB. Free memory was 482.5MB in the beginning and 466.8MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2022-01-19 01:58:42,521 INFO L158 Benchmark]: TraceAbstraction took 811283.73ms. Allocated memory was 513.8MB in the beginning and 6.8GB in the end (delta: 6.3GB). Free memory was 466.8MB in the beginning and 3.7GB in the end (delta: -3.2GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. [2022-01-19 01:58:42,521 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 388.0MB. Free memory is still 349.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 208.99ms. Allocated memory was 388.0MB in the beginning and 513.8MB in the end (delta: 125.8MB). Free memory was 332.7MB in the beginning and 485.7MB in the end (delta: -152.9MB). Peak memory consumption was 8.7MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 25.29ms. Allocated memory is still 513.8MB. Free memory was 485.7MB in the beginning and 483.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.23ms. Allocated memory is still 513.8MB. Free memory was 483.6MB in the beginning and 482.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 256.06ms. Allocated memory is still 513.8MB. Free memory was 482.5MB in the beginning and 466.8MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 811283.73ms. Allocated memory was 513.8MB in the beginning and 6.8GB in the end (delta: 6.3GB). Free memory was 466.8MB in the beginning and 3.7GB in the end (delta: -3.2GB). Peak memory consumption was 3.4GB. 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 CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (46states, 52/89 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 185125 conditions, 8586 events (3187/8585 cut-off events. For 1636662/1636715 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 100522 event pairs, 84 based on Foata normal form. 17/9634 useless extension candidates. Maximal degree in co-relation 184720. Up to 1570 conditions per place.). - 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 CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (46states, 52/89 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 185125 conditions, 8586 events (3187/8585 cut-off events. For 1636662/1636715 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 100522 event pairs, 84 based on Foata normal form. 17/9634 useless extension candidates. Maximal degree in co-relation 184720. Up to 1570 conditions per place.). - 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 CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (46states, 52/89 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 185125 conditions, 8586 events (3187/8585 cut-off events. For 1636662/1636715 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 100522 event pairs, 84 based on Foata normal form. 17/9634 useless extension candidates. Maximal degree in co-relation 184720. Up to 1570 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 104 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: 811.2s, OverallIterations: 45, TraceHistogramMax: 2, PathProgramHistogramMax: 31, EmptinessCheckTime: 0.0s, AutomataDifference: 753.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19775 SdHoareTripleChecker+Valid, 27.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19775 mSDsluCounter, 19498 SdHoareTripleChecker+Invalid, 22.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 26466 mSDsCounter, 5808 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 69402 IncrementalHoareTripleChecker+Invalid, 75210 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5808 mSolverCounterUnsat, 1513 mSDtfsCounter, 69402 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9237 GetRequests, 4349 SyntacticMatches, 92 SemanticMatches, 4796 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268987 ImplicationChecksByTransitivity, 140.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=339895occurred in iteration=44, InterpolantAutomatonStates: 3572, 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: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 46.5s InterpolantComputationTime, 5726 NumberOfCodeBlocks, 5690 NumberOfCodeBlocksAsserted, 114 NumberOfCheckSat, 8251 ConstructedInterpolants, 0 QuantifiedInterpolants, 80996 SizeOfPredicates, 482 NumberOfNonLiveVariables, 5889 ConjunctsInSsa, 921 ConjunctsInUnsatCore, 121 InterpolantComputations, 7 PerfectInterpolantSequences, 0/369 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