/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-mult-equiv.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 02:22:37,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 02:22:37,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 02:22:38,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 02:22:38,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 02:22:38,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 02:22:38,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 02:22:38,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 02:22:38,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 02:22:38,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 02:22:38,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 02:22:38,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 02:22:38,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 02:22:38,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 02:22:38,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 02:22:38,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 02:22:38,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 02:22:38,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 02:22:38,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 02:22:38,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 02:22:38,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 02:22:38,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 02:22:38,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 02:22:38,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 02:22:38,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 02:22:38,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 02:22:38,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 02:22:38,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 02:22:38,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 02:22:38,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 02:22:38,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 02:22:38,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 02:22:38,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 02:22:38,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 02:22:38,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 02:22:38,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 02:22:38,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 02:22:38,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 02:22:38,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 02:22:38,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 02:22:38,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 02:22:38,085 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-01-19 02:22:38,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 02:22:38,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 02:22:38,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 02:22:38,102 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 02:22:38,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 02:22:38,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 02:22:38,103 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 02:22:38,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 02:22:38,103 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 02:22:38,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 02:22:38,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 02:22:38,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 02:22:38,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 02:22:38,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 02:22:38,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 02:22:38,104 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 02:22:38,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 02:22:38,104 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 02:22:38,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 02:22:38,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 02:22:38,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 02:22:38,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 02:22:38,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 02:22:38,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 02:22:38,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 02:22:38,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 02:22:38,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 02:22:38,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 02:22:38,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 02:22:38,105 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 02:22:38,105 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 02:22:38,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 02:22:38,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 02:22:38,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 02:22:38,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 02:22:38,305 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 02:22:38,308 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 02:22:38,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2022-01-19 02:22:38,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7199bd1a/687a487d1d984da6b23dd2b885346e73/FLAGdb4f1c51b [2022-01-19 02:22:38,731 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 02:22:38,731 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2022-01-19 02:22:38,735 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7199bd1a/687a487d1d984da6b23dd2b885346e73/FLAGdb4f1c51b [2022-01-19 02:22:38,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7199bd1a/687a487d1d984da6b23dd2b885346e73 [2022-01-19 02:22:38,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 02:22:38,745 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 02:22:38,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 02:22:38,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 02:22:38,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 02:22:38,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:22:38" (1/1) ... [2022-01-19 02:22:38,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@320e13c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:22:38, skipping insertion in model container [2022-01-19 02:22:38,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:22:38" (1/1) ... [2022-01-19 02:22:38,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 02:22:38,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 02:22:38,884 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2022-01-19 02:22:38,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 02:22:38,898 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 02:22:38,911 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2022-01-19 02:22:38,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 02:22:38,920 INFO L208 MainTranslator]: Completed translation [2022-01-19 02:22:38,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:22:38 WrapperNode [2022-01-19 02:22:38,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 02:22:38,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 02:22:38,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 02:22:38,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 02:22:38,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:22:38" (1/1) ... [2022-01-19 02:22:38,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:22:38" (1/1) ... [2022-01-19 02:22:38,946 INFO L137 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-01-19 02:22:38,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 02:22:38,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 02:22:38,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 02:22:38,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 02:22:38,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:22:38" (1/1) ... [2022-01-19 02:22:38,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:22:38" (1/1) ... [2022-01-19 02:22:38,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:22:38" (1/1) ... [2022-01-19 02:22:38,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:22:38" (1/1) ... [2022-01-19 02:22:38,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:22:38" (1/1) ... [2022-01-19 02:22:38,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:22:38" (1/1) ... [2022-01-19 02:22:38,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:22:38" (1/1) ... [2022-01-19 02:22:38,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 02:22:38,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 02:22:38,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 02:22:38,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 02:22:38,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:22:38" (1/1) ... [2022-01-19 02:22:38,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 02:22:38,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:22:39,008 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 02:22:39,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-19 02:22:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 02:22:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 02:22:39,054 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 02:22:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 02:22:39,054 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 02:22:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-19 02:22:39,054 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-19 02:22:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 02:22:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 02:22:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 02:22:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 02:22:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 02:22:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 02:22:39,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 02:22:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 02:22:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 02:22:39,056 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 02:22:39,122 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 02:22:39,123 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 02:22:39,258 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 02:22:39,289 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 02:22:39,289 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-19 02:22:39,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:22:39 BoogieIcfgContainer [2022-01-19 02:22:39,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 02:22:39,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 02:22:39,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 02:22:39,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 02:22:39,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:22:38" (1/3) ... [2022-01-19 02:22:39,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd95628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:22:39, skipping insertion in model container [2022-01-19 02:22:39,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:22:38" (2/3) ... [2022-01-19 02:22:39,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd95628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:22:39, skipping insertion in model container [2022-01-19 02:22:39,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:22:39" (3/3) ... [2022-01-19 02:22:39,297 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2022-01-19 02:22:39,300 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 02:22:39,300 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 02:22:39,300 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 02:22:39,335 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,336 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,337 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,337 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,337 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,337 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,338 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,338 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,338 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,338 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,338 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,338 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,339 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,339 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,340 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,341 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,341 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,341 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,342 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,342 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,342 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,342 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,342 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,343 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,343 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,343 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,344 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,344 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,347 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,347 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,347 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,348 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,348 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,348 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,350 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,350 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,351 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,351 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,351 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,351 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,352 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,352 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,352 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,352 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:22:39,356 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-19 02:22:39,398 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 02:22:39,404 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 02:22:39,404 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-19 02:22:39,413 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2022-01-19 02:22:39,448 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2022-01-19 02:22:39,448 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 02:22:39,451 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2022-01-19 02:22:39,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2022-01-19 02:22:39,455 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2022-01-19 02:22:39,473 INFO L129 PetriNetUnfolder]: 7/82 cut-off events. [2022-01-19 02:22:39,473 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 02:22:39,474 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:39,474 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:39,474 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:39,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:39,478 INFO L85 PathProgramCache]: Analyzing trace with hash 64157928, now seen corresponding path program 1 times [2022-01-19 02:22:39,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:39,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138793669] [2022-01-19 02:22:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:39,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:39,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:39,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138793669] [2022-01-19 02:22:39,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138793669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:39,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:39,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 02:22:39,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82093705] [2022-01-19 02:22:39,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:39,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 02:22:39,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 02:22:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 02:22:39,684 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2022-01-19 02:22:39,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:39,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:39,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2022-01-19 02:22:39,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:39,729 INFO L129 PetriNetUnfolder]: 26/138 cut-off events. [2022-01-19 02:22:39,730 INFO L130 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2022-01-19 02:22:39,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 246 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2022-01-19 02:22:39,734 INFO L132 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2022-01-19 02:22:39,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2022-01-19 02:22:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 02:22:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 02:22:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2022-01-19 02:22:39,743 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2022-01-19 02:22:39,743 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2022-01-19 02:22:39,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2022-01-19 02:22:39,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:39,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2022-01-19 02:22:39,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:39,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:39,755 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:39,757 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2022-01-19 02:22:39,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2022-01-19 02:22:39,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-01-19 02:22:39,762 INFO L242 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2022-01-19 02:22:39,763 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2022-01-19 02:22:39,765 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2022-01-19 02:22:39,765 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2022-01-19 02:22:39,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:39,766 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:39,766 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:39,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 02:22:39,766 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:39,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1292779301, now seen corresponding path program 1 times [2022-01-19 02:22:39,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:39,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746982867] [2022-01-19 02:22:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:39,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:39,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:39,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746982867] [2022-01-19 02:22:39,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746982867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:39,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:39,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 02:22:39,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022093188] [2022-01-19 02:22:39,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:39,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:22:39,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:39,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:22:39,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 02:22:39,933 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2022-01-19 02:22:39,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:39,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:39,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2022-01-19 02:22:39,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:40,086 INFO L129 PetriNetUnfolder]: 34/192 cut-off events. [2022-01-19 02:22:40,087 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-01-19 02:22:40,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 479 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2022-01-19 02:22:40,091 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2022-01-19 02:22:40,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2022-01-19 02:22:40,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:22:40,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:22:40,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-01-19 02:22:40,097 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-01-19 02:22:40,098 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-01-19 02:22:40,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-01-19 02:22:40,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:40,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-01-19 02:22:40,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:40,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:40,104 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:40,104 INFO L186 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2022-01-19 02:22:40,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2022-01-19 02:22:40,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 02:22:40,107 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2022-01-19 02:22:40,107 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-01-19 02:22:40,108 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2022-01-19 02:22:40,108 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2022-01-19 02:22:40,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:40,109 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:40,109 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 02:22:40,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 02:22:40,110 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:40,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:40,111 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2022-01-19 02:22:40,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:40,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313998300] [2022-01-19 02:22:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:40,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:40,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:40,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313998300] [2022-01-19 02:22:40,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313998300] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:40,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:40,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 02:22:40,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921942175] [2022-01-19 02:22:40,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:40,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:22:40,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:40,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:22:40,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-19 02:22:40,323 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 02:22:40,324 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:40,324 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:40,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 02:22:40,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:40,570 INFO L129 PetriNetUnfolder]: 297/760 cut-off events. [2022-01-19 02:22:40,570 INFO L130 PetriNetUnfolder]: For 129/134 co-relation queries the response was YES. [2022-01-19 02:22:40,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 760 events. 297/760 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4079 event pairs, 54 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1452. Up to 254 conditions per place. [2022-01-19 02:22:40,576 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 53 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2022-01-19 02:22:40,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 486 flow [2022-01-19 02:22:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 02:22:40,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 02:22:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 636 transitions. [2022-01-19 02:22:40,578 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8195876288659794 [2022-01-19 02:22:40,578 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 636 transitions. [2022-01-19 02:22:40,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 636 transitions. [2022-01-19 02:22:40,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:40,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 636 transitions. [2022-01-19 02:22:40,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.5) internal successors, (636), 8 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:40,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:40,581 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:40,581 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 8 states and 636 transitions. [2022-01-19 02:22:40,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 486 flow [2022-01-19 02:22:40,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-01-19 02:22:40,587 INFO L242 Difference]: Finished difference. Result has 96 places, 98 transitions, 330 flow [2022-01-19 02:22:40,587 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2022-01-19 02:22:40,589 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 10 predicate places. [2022-01-19 02:22:40,589 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 330 flow [2022-01-19 02:22:40,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:40,590 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:40,590 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 02:22:40,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 02:22:40,590 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:40,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:40,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1540254679, now seen corresponding path program 2 times [2022-01-19 02:22:40,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:40,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359303290] [2022-01-19 02:22:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:40,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:40,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:40,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359303290] [2022-01-19 02:22:40,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359303290] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:40,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:40,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 02:22:40,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384189208] [2022-01-19 02:22:40,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:40,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 02:22:40,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:40,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 02:22:40,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 02:22:40,716 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 02:22:40,716 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:40,716 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:40,716 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 02:22:40,716 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:40,863 INFO L129 PetriNetUnfolder]: 371/890 cut-off events. [2022-01-19 02:22:40,863 INFO L130 PetriNetUnfolder]: For 450/454 co-relation queries the response was YES. [2022-01-19 02:22:40,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 890 events. 371/890 cut-off events. For 450/454 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4800 event pairs, 71 based on Foata normal form. 18/843 useless extension candidates. Maximal degree in co-relation 2091. Up to 395 conditions per place. [2022-01-19 02:22:40,870 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 53 selfloop transitions, 21 changer transitions 2/133 dead transitions. [2022-01-19 02:22:40,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 628 flow [2022-01-19 02:22:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:22:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:22:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2022-01-19 02:22:40,871 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-01-19 02:22:40,871 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2022-01-19 02:22:40,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2022-01-19 02:22:40,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:40,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2022-01-19 02:22:40,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:40,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:40,875 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:40,875 INFO L186 Difference]: Start difference. First operand has 96 places, 98 transitions, 330 flow. Second operand 6 states and 485 transitions. [2022-01-19 02:22:40,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 628 flow [2022-01-19 02:22:40,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 02:22:40,881 INFO L242 Difference]: Finished difference. Result has 104 places, 108 transitions, 469 flow [2022-01-19 02:22:40,881 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=104, PETRI_TRANSITIONS=108} [2022-01-19 02:22:40,882 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2022-01-19 02:22:40,882 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 108 transitions, 469 flow [2022-01-19 02:22:40,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:40,883 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:40,883 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 02:22:40,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 02:22:40,883 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:40,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:40,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1923841693, now seen corresponding path program 3 times [2022-01-19 02:22:40,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:40,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949024050] [2022-01-19 02:22:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:40,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:41,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:41,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949024050] [2022-01-19 02:22:41,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949024050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:41,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:41,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 02:22:41,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307569448] [2022-01-19 02:22:41,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:41,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:22:41,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:41,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:22:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-19 02:22:41,023 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 02:22:41,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 108 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:41,024 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:41,024 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 02:22:41,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:41,303 INFO L129 PetriNetUnfolder]: 576/1343 cut-off events. [2022-01-19 02:22:41,304 INFO L130 PetriNetUnfolder]: For 998/1044 co-relation queries the response was YES. [2022-01-19 02:22:41,307 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3285 conditions, 1343 events. 576/1343 cut-off events. For 998/1044 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8163 event pairs, 89 based on Foata normal form. 19/1294 useless extension candidates. Maximal degree in co-relation 3269. Up to 389 conditions per place. [2022-01-19 02:22:41,313 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 70 selfloop transitions, 38 changer transitions 2/167 dead transitions. [2022-01-19 02:22:41,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 917 flow [2022-01-19 02:22:41,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 02:22:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 02:22:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 731 transitions. [2022-01-19 02:22:41,315 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8373424971363116 [2022-01-19 02:22:41,316 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 731 transitions. [2022-01-19 02:22:41,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 731 transitions. [2022-01-19 02:22:41,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:41,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 731 transitions. [2022-01-19 02:22:41,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.22222222222223) internal successors, (731), 9 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:41,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:41,318 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:41,318 INFO L186 Difference]: Start difference. First operand has 104 places, 108 transitions, 469 flow. Second operand 9 states and 731 transitions. [2022-01-19 02:22:41,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 917 flow [2022-01-19 02:22:41,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 871 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-01-19 02:22:41,326 INFO L242 Difference]: Finished difference. Result has 116 places, 121 transitions, 671 flow [2022-01-19 02:22:41,326 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=671, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2022-01-19 02:22:41,328 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2022-01-19 02:22:41,328 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 671 flow [2022-01-19 02:22:41,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:41,328 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:41,328 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 02:22:41,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 02:22:41,329 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:41,329 INFO L85 PathProgramCache]: Analyzing trace with hash 982794509, now seen corresponding path program 4 times [2022-01-19 02:22:41,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:41,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589439947] [2022-01-19 02:22:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:41,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:41,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:41,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589439947] [2022-01-19 02:22:41,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589439947] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:41,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:41,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 02:22:41,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727827176] [2022-01-19 02:22:41,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:41,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:22:41,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:41,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:22:41,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-19 02:22:41,424 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 02:22:41,424 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 671 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:41,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:41,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 02:22:41,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:41,661 INFO L129 PetriNetUnfolder]: 594/1397 cut-off events. [2022-01-19 02:22:41,662 INFO L130 PetriNetUnfolder]: For 2230/2243 co-relation queries the response was YES. [2022-01-19 02:22:41,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3953 conditions, 1397 events. 594/1397 cut-off events. For 2230/2243 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8647 event pairs, 153 based on Foata normal form. 16/1310 useless extension candidates. Maximal degree in co-relation 3932. Up to 527 conditions per place. [2022-01-19 02:22:41,673 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 64 selfloop transitions, 37 changer transitions 2/160 dead transitions. [2022-01-19 02:22:41,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1072 flow [2022-01-19 02:22:41,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 02:22:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 02:22:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2022-01-19 02:22:41,676 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8234536082474226 [2022-01-19 02:22:41,676 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2022-01-19 02:22:41,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2022-01-19 02:22:41,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:41,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2022-01-19 02:22:41,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:41,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:41,679 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:41,679 INFO L186 Difference]: Start difference. First operand has 116 places, 121 transitions, 671 flow. Second operand 8 states and 639 transitions. [2022-01-19 02:22:41,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1072 flow [2022-01-19 02:22:41,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 1052 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-01-19 02:22:41,689 INFO L242 Difference]: Finished difference. Result has 124 places, 128 transitions, 818 flow [2022-01-19 02:22:41,689 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2022-01-19 02:22:41,691 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 38 predicate places. [2022-01-19 02:22:41,691 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 818 flow [2022-01-19 02:22:41,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:41,693 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:41,693 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:41,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 02:22:41,693 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:41,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:41,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1775458840, now seen corresponding path program 1 times [2022-01-19 02:22:41,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:41,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889872937] [2022-01-19 02:22:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:41,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:41,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:41,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889872937] [2022-01-19 02:22:41,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889872937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:41,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:41,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 02:22:41,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490507847] [2022-01-19 02:22:41,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:41,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 02:22:41,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 02:22:41,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 02:22:41,776 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 02:22:41,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 128 transitions, 818 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:41,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:41,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 02:22:41,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:42,008 INFO L129 PetriNetUnfolder]: 836/1929 cut-off events. [2022-01-19 02:22:42,008 INFO L130 PetriNetUnfolder]: For 3921/4121 co-relation queries the response was YES. [2022-01-19 02:22:42,015 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5970 conditions, 1929 events. 836/1929 cut-off events. For 3921/4121 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13026 event pairs, 166 based on Foata normal form. 81/1833 useless extension candidates. Maximal degree in co-relation 5945. Up to 719 conditions per place. [2022-01-19 02:22:42,023 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 49 selfloop transitions, 41 changer transitions 0/156 dead transitions. [2022-01-19 02:22:42,023 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 156 transitions, 1099 flow [2022-01-19 02:22:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:22:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:22:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-01-19 02:22:42,025 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-01-19 02:22:42,025 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-01-19 02:22:42,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-01-19 02:22:42,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:42,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-01-19 02:22:42,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:42,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:42,027 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:42,027 INFO L186 Difference]: Start difference. First operand has 124 places, 128 transitions, 818 flow. Second operand 6 states and 486 transitions. [2022-01-19 02:22:42,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 156 transitions, 1099 flow [2022-01-19 02:22:42,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 156 transitions, 1035 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-01-19 02:22:42,043 INFO L242 Difference]: Finished difference. Result has 127 places, 133 transitions, 920 flow [2022-01-19 02:22:42,044 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=920, PETRI_PLACES=127, PETRI_TRANSITIONS=133} [2022-01-19 02:22:42,044 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 41 predicate places. [2022-01-19 02:22:42,044 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 133 transitions, 920 flow [2022-01-19 02:22:42,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:42,044 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:42,045 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:42,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 02:22:42,045 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:42,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2079569762, now seen corresponding path program 2 times [2022-01-19 02:22:42,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:42,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719281136] [2022-01-19 02:22:42,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:42,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:42,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:42,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719281136] [2022-01-19 02:22:42,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719281136] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:42,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:42,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 02:22:42,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49317567] [2022-01-19 02:22:42,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:42,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 02:22:42,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:42,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 02:22:42,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 02:22:42,132 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 02:22:42,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 133 transitions, 920 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:42,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:42,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 02:22:42,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:42,377 INFO L129 PetriNetUnfolder]: 996/2323 cut-off events. [2022-01-19 02:22:42,377 INFO L130 PetriNetUnfolder]: For 7235/7426 co-relation queries the response was YES. [2022-01-19 02:22:42,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8181 conditions, 2323 events. 996/2323 cut-off events. For 7235/7426 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16848 event pairs, 79 based on Foata normal form. 81/2312 useless extension candidates. Maximal degree in co-relation 8153. Up to 752 conditions per place. [2022-01-19 02:22:42,434 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 99 selfloop transitions, 74 changer transitions 2/241 dead transitions. [2022-01-19 02:22:42,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 241 transitions, 2537 flow [2022-01-19 02:22:42,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 02:22:42,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 02:22:42,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 411 transitions. [2022-01-19 02:22:42,437 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8474226804123711 [2022-01-19 02:22:42,437 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 411 transitions. [2022-01-19 02:22:42,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 411 transitions. [2022-01-19 02:22:42,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:42,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 411 transitions. [2022-01-19 02:22:42,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:42,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:42,440 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:42,440 INFO L186 Difference]: Start difference. First operand has 127 places, 133 transitions, 920 flow. Second operand 5 states and 411 transitions. [2022-01-19 02:22:42,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 241 transitions, 2537 flow [2022-01-19 02:22:42,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 241 transitions, 2403 flow, removed 15 selfloop flow, removed 2 redundant places. [2022-01-19 02:22:42,464 INFO L242 Difference]: Finished difference. Result has 132 places, 188 transitions, 1830 flow [2022-01-19 02:22:42,464 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1830, PETRI_PLACES=132, PETRI_TRANSITIONS=188} [2022-01-19 02:22:42,466 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 46 predicate places. [2022-01-19 02:22:42,466 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 188 transitions, 1830 flow [2022-01-19 02:22:42,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:42,466 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:42,466 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:42,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-19 02:22:42,467 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:42,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:42,467 INFO L85 PathProgramCache]: Analyzing trace with hash 823447134, now seen corresponding path program 1 times [2022-01-19 02:22:42,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:42,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528469052] [2022-01-19 02:22:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:42,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:42,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:42,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528469052] [2022-01-19 02:22:42,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528469052] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:22:42,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232292032] [2022-01-19 02:22:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:42,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:22:42,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:22:42,594 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 02:22:42,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 02:22:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:42,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 02:22:42,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:22:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:43,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:22:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:43,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232292032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:22:43,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:22:43,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-01-19 02:22:43,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40399260] [2022-01-19 02:22:43,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:22:43,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 02:22:43,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:43,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 02:22:43,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-19 02:22:43,582 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-01-19 02:22:43,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 188 transitions, 1830 flow. Second operand has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:43,583 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:43,583 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-01-19 02:22:43,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:44,249 INFO L129 PetriNetUnfolder]: 1451/3478 cut-off events. [2022-01-19 02:22:44,249 INFO L130 PetriNetUnfolder]: For 13232/13363 co-relation queries the response was YES. [2022-01-19 02:22:44,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13593 conditions, 3478 events. 1451/3478 cut-off events. For 13232/13363 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 27180 event pairs, 165 based on Foata normal form. 172/3581 useless extension candidates. Maximal degree in co-relation 13562. Up to 760 conditions per place. [2022-01-19 02:22:44,277 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 197 selfloop transitions, 110 changer transitions 10/369 dead transitions. [2022-01-19 02:22:44,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 369 transitions, 4117 flow [2022-01-19 02:22:44,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-19 02:22:44,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-01-19 02:22:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1089 transitions. [2022-01-19 02:22:44,280 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7484536082474227 [2022-01-19 02:22:44,280 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1089 transitions. [2022-01-19 02:22:44,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1089 transitions. [2022-01-19 02:22:44,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:44,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1089 transitions. [2022-01-19 02:22:44,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.6) internal successors, (1089), 15 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:44,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:44,284 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:44,284 INFO L186 Difference]: Start difference. First operand has 132 places, 188 transitions, 1830 flow. Second operand 15 states and 1089 transitions. [2022-01-19 02:22:44,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 369 transitions, 4117 flow [2022-01-19 02:22:44,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 369 transitions, 4115 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-01-19 02:22:44,313 INFO L242 Difference]: Finished difference. Result has 153 places, 228 transitions, 2620 flow [2022-01-19 02:22:44,314 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2620, PETRI_PLACES=153, PETRI_TRANSITIONS=228} [2022-01-19 02:22:44,314 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 67 predicate places. [2022-01-19 02:22:44,314 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 228 transitions, 2620 flow [2022-01-19 02:22:44,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:44,315 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:44,315 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:44,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 02:22:44,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:22:44,528 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:44,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:44,528 INFO L85 PathProgramCache]: Analyzing trace with hash 124335744, now seen corresponding path program 2 times [2022-01-19 02:22:44,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:44,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722234087] [2022-01-19 02:22:44,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:44,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:44,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:44,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722234087] [2022-01-19 02:22:44,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722234087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:22:44,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791609787] [2022-01-19 02:22:44,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:22:44,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:22:44,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:22:44,708 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:22:44,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 02:22:44,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:22:44,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:22:44,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:22:44,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:22:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:44,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 02:22:44,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791609787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:44,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 02:22:44,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-01-19 02:22:44,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441994298] [2022-01-19 02:22:44,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:44,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:22:44,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:44,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:22:44,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-01-19 02:22:44,929 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-01-19 02:22:44,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 228 transitions, 2620 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:44,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:44,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-01-19 02:22:44,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:45,679 INFO L129 PetriNetUnfolder]: 2586/5598 cut-off events. [2022-01-19 02:22:45,679 INFO L130 PetriNetUnfolder]: For 25913/25913 co-relation queries the response was YES. [2022-01-19 02:22:45,704 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23983 conditions, 5598 events. 2586/5598 cut-off events. For 25913/25913 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46389 event pairs, 870 based on Foata normal form. 19/5496 useless extension candidates. Maximal degree in co-relation 23944. Up to 3766 conditions per place. [2022-01-19 02:22:45,729 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 180 selfloop transitions, 82 changer transitions 7/324 dead transitions. [2022-01-19 02:22:45,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 324 transitions, 4252 flow [2022-01-19 02:22:45,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 02:22:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 02:22:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 642 transitions. [2022-01-19 02:22:45,731 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273195876288659 [2022-01-19 02:22:45,731 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 642 transitions. [2022-01-19 02:22:45,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 642 transitions. [2022-01-19 02:22:45,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:45,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 642 transitions. [2022-01-19 02:22:45,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.25) internal successors, (642), 8 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:45,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:45,733 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:45,733 INFO L186 Difference]: Start difference. First operand has 153 places, 228 transitions, 2620 flow. Second operand 8 states and 642 transitions. [2022-01-19 02:22:45,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 324 transitions, 4252 flow [2022-01-19 02:22:45,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 324 transitions, 4088 flow, removed 33 selfloop flow, removed 5 redundant places. [2022-01-19 02:22:45,797 INFO L242 Difference]: Finished difference. Result has 159 places, 271 transitions, 3537 flow [2022-01-19 02:22:45,797 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2508, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3537, PETRI_PLACES=159, PETRI_TRANSITIONS=271} [2022-01-19 02:22:45,798 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 73 predicate places. [2022-01-19 02:22:45,798 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 271 transitions, 3537 flow [2022-01-19 02:22:45,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:45,798 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:45,798 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:45,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-19 02:22:46,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-19 02:22:46,017 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:46,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:46,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1893633040, now seen corresponding path program 3 times [2022-01-19 02:22:46,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:46,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719305034] [2022-01-19 02:22:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:46,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:46,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:46,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719305034] [2022-01-19 02:22:46,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719305034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:46,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:46,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 02:22:46,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134590253] [2022-01-19 02:22:46,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:46,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:22:46,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:46,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:22:46,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 02:22:46,092 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-01-19 02:22:46,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 271 transitions, 3537 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:46,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:46,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-01-19 02:22:46,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:46,768 INFO L129 PetriNetUnfolder]: 2587/5651 cut-off events. [2022-01-19 02:22:46,769 INFO L130 PetriNetUnfolder]: For 30144/30227 co-relation queries the response was YES. [2022-01-19 02:22:46,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25255 conditions, 5651 events. 2587/5651 cut-off events. For 30144/30227 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 46822 event pairs, 1032 based on Foata normal form. 12/5506 useless extension candidates. Maximal degree in co-relation 25212. Up to 3838 conditions per place. [2022-01-19 02:22:46,822 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 164 selfloop transitions, 75 changer transitions 1/295 dead transitions. [2022-01-19 02:22:46,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 295 transitions, 4192 flow [2022-01-19 02:22:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 02:22:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 02:22:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 403 transitions. [2022-01-19 02:22:46,824 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8309278350515464 [2022-01-19 02:22:46,824 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 403 transitions. [2022-01-19 02:22:46,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 403 transitions. [2022-01-19 02:22:46,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:46,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 403 transitions. [2022-01-19 02:22:46,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:46,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:46,826 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:46,826 INFO L186 Difference]: Start difference. First operand has 159 places, 271 transitions, 3537 flow. Second operand 5 states and 403 transitions. [2022-01-19 02:22:46,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 295 transitions, 4192 flow [2022-01-19 02:22:46,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 295 transitions, 4149 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-01-19 02:22:46,908 INFO L242 Difference]: Finished difference. Result has 164 places, 273 transitions, 3764 flow [2022-01-19 02:22:46,908 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3494, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3764, PETRI_PLACES=164, PETRI_TRANSITIONS=273} [2022-01-19 02:22:46,909 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 78 predicate places. [2022-01-19 02:22:46,909 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 273 transitions, 3764 flow [2022-01-19 02:22:46,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:46,909 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:46,909 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:46,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-19 02:22:46,909 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:46,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1885417408, now seen corresponding path program 3 times [2022-01-19 02:22:46,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:46,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282123240] [2022-01-19 02:22:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:46,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:47,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:47,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282123240] [2022-01-19 02:22:47,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282123240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:47,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:47,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 02:22:47,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933983975] [2022-01-19 02:22:47,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:47,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 02:22:47,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:47,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 02:22:47,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-19 02:22:47,001 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 02:22:47,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 273 transitions, 3764 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:47,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:47,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 02:22:47,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:47,649 INFO L129 PetriNetUnfolder]: 2293/5624 cut-off events. [2022-01-19 02:22:47,650 INFO L130 PetriNetUnfolder]: For 30705/31223 co-relation queries the response was YES. [2022-01-19 02:22:47,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24668 conditions, 5624 events. 2293/5624 cut-off events. For 30705/31223 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 50519 event pairs, 309 based on Foata normal form. 82/5549 useless extension candidates. Maximal degree in co-relation 24623. Up to 2011 conditions per place. [2022-01-19 02:22:47,701 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 101 selfloop transitions, 199 changer transitions 2/376 dead transitions. [2022-01-19 02:22:47,701 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 376 transitions, 5527 flow [2022-01-19 02:22:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:22:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:22:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 497 transitions. [2022-01-19 02:22:47,702 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539518900343642 [2022-01-19 02:22:47,702 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 497 transitions. [2022-01-19 02:22:47,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 497 transitions. [2022-01-19 02:22:47,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:47,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 497 transitions. [2022-01-19 02:22:47,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:47,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:47,704 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:47,704 INFO L186 Difference]: Start difference. First operand has 164 places, 273 transitions, 3764 flow. Second operand 6 states and 497 transitions. [2022-01-19 02:22:47,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 376 transitions, 5527 flow [2022-01-19 02:22:47,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 376 transitions, 5446 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-19 02:22:47,776 INFO L242 Difference]: Finished difference. Result has 170 places, 333 transitions, 5068 flow [2022-01-19 02:22:47,777 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3689, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5068, PETRI_PLACES=170, PETRI_TRANSITIONS=333} [2022-01-19 02:22:47,777 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 84 predicate places. [2022-01-19 02:22:47,777 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 333 transitions, 5068 flow [2022-01-19 02:22:47,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:47,777 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:47,778 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, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:47,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-19 02:22:47,778 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:47,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:47,778 INFO L85 PathProgramCache]: Analyzing trace with hash 20413346, now seen corresponding path program 4 times [2022-01-19 02:22:47,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:47,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858773681] [2022-01-19 02:22:47,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:47,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:47,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:47,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858773681] [2022-01-19 02:22:47,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858773681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:47,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:47,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 02:22:47,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878352036] [2022-01-19 02:22:47,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:47,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 02:22:47,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:47,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 02:22:47,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 02:22:47,863 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 02:22:47,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 333 transitions, 5068 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:47,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:47,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 02:22:47,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:48,518 INFO L129 PetriNetUnfolder]: 2118/5578 cut-off events. [2022-01-19 02:22:48,519 INFO L130 PetriNetUnfolder]: For 39697/40209 co-relation queries the response was YES. [2022-01-19 02:22:48,547 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26399 conditions, 5578 events. 2118/5578 cut-off events. For 39697/40209 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 52132 event pairs, 307 based on Foata normal form. 70/5484 useless extension candidates. Maximal degree in co-relation 26351. Up to 1847 conditions per place. [2022-01-19 02:22:48,569 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 102 selfloop transitions, 213 changer transitions 8/397 dead transitions. [2022-01-19 02:22:48,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 397 transitions, 6532 flow [2022-01-19 02:22:48,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:22:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:22:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-01-19 02:22:48,571 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-01-19 02:22:48,571 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-01-19 02:22:48,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-01-19 02:22:48,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:48,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-01-19 02:22:48,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:48,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:48,573 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:48,573 INFO L186 Difference]: Start difference. First operand has 170 places, 333 transitions, 5068 flow. Second operand 6 states and 493 transitions. [2022-01-19 02:22:48,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 397 transitions, 6532 flow [2022-01-19 02:22:48,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 397 transitions, 6502 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-01-19 02:22:48,679 INFO L242 Difference]: Finished difference. Result has 177 places, 352 transitions, 5898 flow [2022-01-19 02:22:48,679 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4994, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5898, PETRI_PLACES=177, PETRI_TRANSITIONS=352} [2022-01-19 02:22:48,680 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 91 predicate places. [2022-01-19 02:22:48,680 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 352 transitions, 5898 flow [2022-01-19 02:22:48,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:48,680 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:48,680 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:48,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-19 02:22:48,681 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:48,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:48,681 INFO L85 PathProgramCache]: Analyzing trace with hash 620855476, now seen corresponding path program 5 times [2022-01-19 02:22:48,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:48,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033552500] [2022-01-19 02:22:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:48,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:48,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:48,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033552500] [2022-01-19 02:22:48,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033552500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:22:48,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662777898] [2022-01-19 02:22:48,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:22:48,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:22:48,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:22:48,785 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:22:48,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 02:22:48,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:22:48,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:22:48,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:22:48,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:22:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:49,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 02:22:49,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662777898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:49,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 02:22:49,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-01-19 02:22:49,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197762718] [2022-01-19 02:22:49,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:49,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:22:49,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:49,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:22:49,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-19 02:22:49,168 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-01-19 02:22:49,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 352 transitions, 5898 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:49,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:49,169 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-01-19 02:22:49,169 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:50,181 INFO L129 PetriNetUnfolder]: 3277/7199 cut-off events. [2022-01-19 02:22:50,181 INFO L130 PetriNetUnfolder]: For 62000/62000 co-relation queries the response was YES. [2022-01-19 02:22:50,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37679 conditions, 7199 events. 3277/7199 cut-off events. For 62000/62000 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 63126 event pairs, 948 based on Foata normal form. 39/7115 useless extension candidates. Maximal degree in co-relation 37628. Up to 4843 conditions per place. [2022-01-19 02:22:50,260 INFO L132 encePairwiseOnDemand]: 86/97 looper letters, 256 selfloop transitions, 108 changer transitions 9/428 dead transitions. [2022-01-19 02:22:50,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 428 transitions, 7523 flow [2022-01-19 02:22:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 02:22:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 02:22:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 716 transitions. [2022-01-19 02:22:50,261 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8201603665521191 [2022-01-19 02:22:50,262 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 716 transitions. [2022-01-19 02:22:50,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 716 transitions. [2022-01-19 02:22:50,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:50,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 716 transitions. [2022-01-19 02:22:50,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.55555555555556) internal successors, (716), 9 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:50,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:50,265 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:50,265 INFO L186 Difference]: Start difference. First operand has 177 places, 352 transitions, 5898 flow. Second operand 9 states and 716 transitions. [2022-01-19 02:22:50,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 428 transitions, 7523 flow [2022-01-19 02:22:50,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 428 transitions, 7499 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-01-19 02:22:50,466 INFO L242 Difference]: Finished difference. Result has 189 places, 378 transitions, 6637 flow [2022-01-19 02:22:50,466 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=5878, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6637, PETRI_PLACES=189, PETRI_TRANSITIONS=378} [2022-01-19 02:22:50,466 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 103 predicate places. [2022-01-19 02:22:50,467 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 378 transitions, 6637 flow [2022-01-19 02:22:50,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:50,467 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:50,467 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:50,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-19 02:22:50,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:22:50,670 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:50,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1277185608, now seen corresponding path program 4 times [2022-01-19 02:22:50,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:50,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165190194] [2022-01-19 02:22:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:50,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:50,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:50,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165190194] [2022-01-19 02:22:50,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165190194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:50,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:50,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 02:22:50,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722664080] [2022-01-19 02:22:50,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:50,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 02:22:50,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 02:22:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 02:22:50,731 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 02:22:50,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 378 transitions, 6637 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:50,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:50,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 02:22:50,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:51,409 INFO L129 PetriNetUnfolder]: 2135/5356 cut-off events. [2022-01-19 02:22:51,410 INFO L130 PetriNetUnfolder]: For 54730/54890 co-relation queries the response was YES. [2022-01-19 02:22:51,443 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29082 conditions, 5356 events. 2135/5356 cut-off events. For 54730/54890 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 48142 event pairs, 658 based on Foata normal form. 108/5291 useless extension candidates. Maximal degree in co-relation 29026. Up to 3210 conditions per place. [2022-01-19 02:22:51,467 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 275 selfloop transitions, 63 changer transitions 6/407 dead transitions. [2022-01-19 02:22:51,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 407 transitions, 7506 flow [2022-01-19 02:22:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:22:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:22:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2022-01-19 02:22:51,468 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2022-01-19 02:22:51,468 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2022-01-19 02:22:51,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2022-01-19 02:22:51,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:51,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2022-01-19 02:22:51,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:51,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:51,470 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:51,470 INFO L186 Difference]: Start difference. First operand has 189 places, 378 transitions, 6637 flow. Second operand 6 states and 476 transitions. [2022-01-19 02:22:51,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 407 transitions, 7506 flow [2022-01-19 02:22:51,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 407 transitions, 7348 flow, removed 39 selfloop flow, removed 2 redundant places. [2022-01-19 02:22:51,628 INFO L242 Difference]: Finished difference. Result has 195 places, 368 transitions, 6376 flow [2022-01-19 02:22:51,628 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6376, PETRI_PLACES=195, PETRI_TRANSITIONS=368} [2022-01-19 02:22:51,628 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 109 predicate places. [2022-01-19 02:22:51,628 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 368 transitions, 6376 flow [2022-01-19 02:22:51,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:51,629 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:51,629 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:51,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-19 02:22:51,629 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:51,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:51,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1504437282, now seen corresponding path program 6 times [2022-01-19 02:22:51,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:51,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367300100] [2022-01-19 02:22:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:51,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:51,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:51,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367300100] [2022-01-19 02:22:51,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367300100] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:51,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:51,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 02:22:51,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944847163] [2022-01-19 02:22:51,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:51,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 02:22:51,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:51,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 02:22:51,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 02:22:51,704 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 02:22:51,704 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 368 transitions, 6376 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:51,704 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:51,704 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 02:22:51,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:52,432 INFO L129 PetriNetUnfolder]: 2291/5559 cut-off events. [2022-01-19 02:22:52,433 INFO L130 PetriNetUnfolder]: For 53061/53664 co-relation queries the response was YES. [2022-01-19 02:22:52,462 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29823 conditions, 5559 events. 2291/5559 cut-off events. For 53061/53664 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 49667 event pairs, 249 based on Foata normal form. 127/5531 useless extension candidates. Maximal degree in co-relation 29763. Up to 1798 conditions per place. [2022-01-19 02:22:52,484 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 152 selfloop transitions, 195 changer transitions 4/423 dead transitions. [2022-01-19 02:22:52,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 423 transitions, 7783 flow [2022-01-19 02:22:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 02:22:52,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 02:22:52,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2022-01-19 02:22:52,485 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8577319587628865 [2022-01-19 02:22:52,486 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2022-01-19 02:22:52,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2022-01-19 02:22:52,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:52,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2022-01-19 02:22:52,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:52,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:52,487 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:52,487 INFO L186 Difference]: Start difference. First operand has 195 places, 368 transitions, 6376 flow. Second operand 5 states and 416 transitions. [2022-01-19 02:22:52,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 423 transitions, 7783 flow [2022-01-19 02:22:52,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 423 transitions, 7627 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-01-19 02:22:52,625 INFO L242 Difference]: Finished difference. Result has 198 places, 384 transitions, 7213 flow [2022-01-19 02:22:52,625 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6209, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7213, PETRI_PLACES=198, PETRI_TRANSITIONS=384} [2022-01-19 02:22:52,625 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 112 predicate places. [2022-01-19 02:22:52,625 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 384 transitions, 7213 flow [2022-01-19 02:22:52,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:52,625 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:52,625 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:52,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-19 02:22:52,626 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2008782444, now seen corresponding path program 7 times [2022-01-19 02:22:52,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:52,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774043144] [2022-01-19 02:22:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:52,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:52,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:52,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774043144] [2022-01-19 02:22:52,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774043144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:52,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:52,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 02:22:52,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896593656] [2022-01-19 02:22:52,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:52,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 02:22:52,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:52,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 02:22:52,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 02:22:52,698 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 02:22:52,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 384 transitions, 7213 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:52,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:52,699 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 02:22:52,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:53,580 INFO L129 PetriNetUnfolder]: 2808/6674 cut-off events. [2022-01-19 02:22:53,580 INFO L130 PetriNetUnfolder]: For 76261/76441 co-relation queries the response was YES. [2022-01-19 02:22:53,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37474 conditions, 6674 events. 2808/6674 cut-off events. For 76261/76441 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 60870 event pairs, 801 based on Foata normal form. 70/6555 useless extension candidates. Maximal degree in co-relation 37413. Up to 4100 conditions per place. [2022-01-19 02:22:53,643 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 326 selfloop transitions, 75 changer transitions 3/475 dead transitions. [2022-01-19 02:22:53,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 475 transitions, 9561 flow [2022-01-19 02:22:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:22:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:22:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 487 transitions. [2022-01-19 02:22:53,645 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8367697594501718 [2022-01-19 02:22:53,645 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 487 transitions. [2022-01-19 02:22:53,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 487 transitions. [2022-01-19 02:22:53,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:53,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 487 transitions. [2022-01-19 02:22:53,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.16666666666667) internal successors, (487), 6 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:53,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:53,647 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:53,647 INFO L186 Difference]: Start difference. First operand has 198 places, 384 transitions, 7213 flow. Second operand 6 states and 487 transitions. [2022-01-19 02:22:53,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 475 transitions, 9561 flow [2022-01-19 02:22:53,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 475 transitions, 9114 flow, removed 13 selfloop flow, removed 6 redundant places. [2022-01-19 02:22:53,822 INFO L242 Difference]: Finished difference. Result has 198 places, 399 transitions, 7385 flow [2022-01-19 02:22:53,822 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7385, PETRI_PLACES=198, PETRI_TRANSITIONS=399} [2022-01-19 02:22:53,823 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 112 predicate places. [2022-01-19 02:22:53,823 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 399 transitions, 7385 flow [2022-01-19 02:22:53,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:53,823 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:53,823 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:53,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-19 02:22:53,823 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:53,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:53,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1727722086, now seen corresponding path program 8 times [2022-01-19 02:22:53,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:53,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501801664] [2022-01-19 02:22:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:53,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:53,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:53,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501801664] [2022-01-19 02:22:53,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501801664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:53,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:53,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 02:22:53,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304963990] [2022-01-19 02:22:53,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:53,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 02:22:53,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 02:22:53,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 02:22:53,864 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 02:22:53,865 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 399 transitions, 7385 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:53,865 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:53,865 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 02:22:53,865 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:54,693 INFO L129 PetriNetUnfolder]: 2775/6460 cut-off events. [2022-01-19 02:22:54,693 INFO L130 PetriNetUnfolder]: For 73749/73919 co-relation queries the response was YES. [2022-01-19 02:22:54,733 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36509 conditions, 6460 events. 2775/6460 cut-off events. For 73749/73919 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 57894 event pairs, 799 based on Foata normal form. 54/6334 useless extension candidates. Maximal degree in co-relation 36450. Up to 4237 conditions per place. [2022-01-19 02:22:54,763 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 264 selfloop transitions, 73 changer transitions 6/414 dead transitions. [2022-01-19 02:22:54,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 414 transitions, 8153 flow [2022-01-19 02:22:54,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:22:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:22:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 470 transitions. [2022-01-19 02:22:54,772 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8075601374570447 [2022-01-19 02:22:54,772 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 470 transitions. [2022-01-19 02:22:54,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 470 transitions. [2022-01-19 02:22:54,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:54,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 470 transitions. [2022-01-19 02:22:54,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.33333333333333) internal successors, (470), 6 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:54,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:54,774 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:54,774 INFO L186 Difference]: Start difference. First operand has 198 places, 399 transitions, 7385 flow. Second operand 6 states and 470 transitions. [2022-01-19 02:22:54,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 414 transitions, 8153 flow [2022-01-19 02:22:54,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 414 transitions, 8089 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-19 02:22:54,957 INFO L242 Difference]: Finished difference. Result has 203 places, 398 transitions, 7406 flow [2022-01-19 02:22:54,958 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7203, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7406, PETRI_PLACES=203, PETRI_TRANSITIONS=398} [2022-01-19 02:22:54,958 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 117 predicate places. [2022-01-19 02:22:54,958 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 398 transitions, 7406 flow [2022-01-19 02:22:54,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:54,959 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:54,959 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:54,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-19 02:22:54,959 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:54,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:54,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1741852028, now seen corresponding path program 9 times [2022-01-19 02:22:54,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:54,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902462611] [2022-01-19 02:22:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:54,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:55,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:55,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902462611] [2022-01-19 02:22:55,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902462611] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:22:55,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:22:55,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 02:22:55,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475439140] [2022-01-19 02:22:55,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:22:55,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 02:22:55,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:55,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 02:22:55,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 02:22:55,046 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 02:22:55,046 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 398 transitions, 7406 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:55,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:55,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 02:22:55,047 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:55,940 INFO L129 PetriNetUnfolder]: 2756/6325 cut-off events. [2022-01-19 02:22:55,941 INFO L130 PetriNetUnfolder]: For 77953/78126 co-relation queries the response was YES. [2022-01-19 02:22:55,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36374 conditions, 6325 events. 2756/6325 cut-off events. For 77953/78126 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 55857 event pairs, 836 based on Foata normal form. 57/6173 useless extension candidates. Maximal degree in co-relation 36313. Up to 4241 conditions per place. [2022-01-19 02:22:56,009 INFO L132 encePairwiseOnDemand]: 90/97 looper letters, 253 selfloop transitions, 76 changer transitions 3/403 dead transitions. [2022-01-19 02:22:56,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 403 transitions, 7974 flow [2022-01-19 02:22:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 02:22:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 02:22:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 398 transitions. [2022-01-19 02:22:56,011 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8206185567010309 [2022-01-19 02:22:56,011 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 398 transitions. [2022-01-19 02:22:56,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 398 transitions. [2022-01-19 02:22:56,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:56,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 398 transitions. [2022-01-19 02:22:56,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:56,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:56,013 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:56,013 INFO L186 Difference]: Start difference. First operand has 203 places, 398 transitions, 7406 flow. Second operand 5 states and 398 transitions. [2022-01-19 02:22:56,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 403 transitions, 7974 flow [2022-01-19 02:22:56,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 403 transitions, 7675 flow, removed 23 selfloop flow, removed 9 redundant places. [2022-01-19 02:22:56,209 INFO L242 Difference]: Finished difference. Result has 197 places, 390 transitions, 7103 flow [2022-01-19 02:22:56,210 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6835, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7103, PETRI_PLACES=197, PETRI_TRANSITIONS=390} [2022-01-19 02:22:56,210 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 111 predicate places. [2022-01-19 02:22:56,210 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 390 transitions, 7103 flow [2022-01-19 02:22:56,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:56,210 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:56,210 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:56,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-19 02:22:56,211 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:56,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:56,211 INFO L85 PathProgramCache]: Analyzing trace with hash 2069702826, now seen corresponding path program 1 times [2022-01-19 02:22:56,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:56,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355811403] [2022-01-19 02:22:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:56,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:56,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:56,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355811403] [2022-01-19 02:22:56,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355811403] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:22:56,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041943662] [2022-01-19 02:22:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:56,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:22:56,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:22:56,316 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:22:56,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 02:22:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:56,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-19 02:22:56,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:22:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:56,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:22:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:57,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041943662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:22:57,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:22:57,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 16 [2022-01-19 02:22:57,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902312237] [2022-01-19 02:22:57,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:22:57,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 02:22:57,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:22:57,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 02:22:57,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-19 02:22:57,620 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-01-19 02:22:57,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 390 transitions, 7103 flow. Second operand has 16 states, 16 states have (on average 67.3125) internal successors, (1077), 16 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:57,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:22:57,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-01-19 02:22:57,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:22:58,621 INFO L129 PetriNetUnfolder]: 2379/6531 cut-off events. [2022-01-19 02:22:58,621 INFO L130 PetriNetUnfolder]: For 77316/77938 co-relation queries the response was YES. [2022-01-19 02:22:58,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36000 conditions, 6531 events. 2379/6531 cut-off events. For 77316/77938 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 63821 event pairs, 282 based on Foata normal form. 252/6634 useless extension candidates. Maximal degree in co-relation 35943. Up to 2576 conditions per place. [2022-01-19 02:22:58,685 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 246 selfloop transitions, 317 changer transitions 6/645 dead transitions. [2022-01-19 02:22:58,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 645 transitions, 12563 flow [2022-01-19 02:22:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-19 02:22:58,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-01-19 02:22:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 928 transitions. [2022-01-19 02:22:58,686 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7359238699444886 [2022-01-19 02:22:58,687 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 928 transitions. [2022-01-19 02:22:58,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 928 transitions. [2022-01-19 02:22:58,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:22:58,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 928 transitions. [2022-01-19 02:22:58,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 71.38461538461539) internal successors, (928), 13 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:58,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:58,689 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:58,689 INFO L186 Difference]: Start difference. First operand has 197 places, 390 transitions, 7103 flow. Second operand 13 states and 928 transitions. [2022-01-19 02:22:58,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 645 transitions, 12563 flow [2022-01-19 02:22:58,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 645 transitions, 12373 flow, removed 12 selfloop flow, removed 7 redundant places. [2022-01-19 02:22:58,923 INFO L242 Difference]: Finished difference. Result has 202 places, 536 transitions, 10308 flow [2022-01-19 02:22:58,923 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6913, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10308, PETRI_PLACES=202, PETRI_TRANSITIONS=536} [2022-01-19 02:22:58,924 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 116 predicate places. [2022-01-19 02:22:58,924 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 536 transitions, 10308 flow [2022-01-19 02:22:58,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.3125) internal successors, (1077), 16 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:22:58,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:22:58,924 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:22:58,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 02:22:59,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:22:59,131 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:22:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:22:59,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1920456064, now seen corresponding path program 2 times [2022-01-19 02:22:59,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:22:59,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532193271] [2022-01-19 02:22:59,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:22:59,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:22:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:22:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:59,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:22:59,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532193271] [2022-01-19 02:22:59,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532193271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:22:59,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859795793] [2022-01-19 02:22:59,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:22:59,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:22:59,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:22:59,249 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:22:59,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 02:22:59,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:22:59,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:22:59,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 02:22:59,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:22:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:22:59,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:23:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:23:03,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859795793] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:23:03,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:23:03,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2022-01-19 02:23:03,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470875493] [2022-01-19 02:23:03,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:23:03,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 02:23:03,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:23:03,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 02:23:03,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-19 02:23:03,147 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2022-01-19 02:23:03,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 536 transitions, 10308 flow. Second operand has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:03,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:23:03,148 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2022-01-19 02:23:03,148 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:23:05,369 INFO L129 PetriNetUnfolder]: 4094/10933 cut-off events. [2022-01-19 02:23:05,369 INFO L130 PetriNetUnfolder]: For 125497/125753 co-relation queries the response was YES. [2022-01-19 02:23:05,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62444 conditions, 10933 events. 4094/10933 cut-off events. For 125497/125753 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 116416 event pairs, 302 based on Foata normal form. 165/10910 useless extension candidates. Maximal degree in co-relation 62385. Up to 3256 conditions per place. [2022-01-19 02:23:05,486 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 364 selfloop transitions, 448 changer transitions 9/881 dead transitions. [2022-01-19 02:23:05,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 881 transitions, 17699 flow [2022-01-19 02:23:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 02:23:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 02:23:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1262 transitions. [2022-01-19 02:23:05,488 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.722794959908362 [2022-01-19 02:23:05,488 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1262 transitions. [2022-01-19 02:23:05,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1262 transitions. [2022-01-19 02:23:05,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:23:05,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1262 transitions. [2022-01-19 02:23:05,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 70.11111111111111) internal successors, (1262), 18 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:05,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 97.0) internal successors, (1843), 19 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:05,492 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 97.0) internal successors, (1843), 19 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:05,492 INFO L186 Difference]: Start difference. First operand has 202 places, 536 transitions, 10308 flow. Second operand 18 states and 1262 transitions. [2022-01-19 02:23:05,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 881 transitions, 17699 flow [2022-01-19 02:23:05,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 881 transitions, 17168 flow, removed 230 selfloop flow, removed 4 redundant places. [2022-01-19 02:23:05,869 INFO L242 Difference]: Finished difference. Result has 218 places, 654 transitions, 13234 flow [2022-01-19 02:23:05,870 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=9841, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13234, PETRI_PLACES=218, PETRI_TRANSITIONS=654} [2022-01-19 02:23:05,870 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 132 predicate places. [2022-01-19 02:23:05,870 INFO L470 AbstractCegarLoop]: Abstraction has has 218 places, 654 transitions, 13234 flow [2022-01-19 02:23:05,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:05,870 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:23:05,871 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:23:05,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-19 02:23:06,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:06,073 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 02:23:06,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:23:06,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2081286502, now seen corresponding path program 3 times [2022-01-19 02:23:06,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:23:06,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112790393] [2022-01-19 02:23:06,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:06,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:23:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:23:06,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:23:06,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112790393] [2022-01-19 02:23:06,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112790393] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:23:06,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945948828] [2022-01-19 02:23:06,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:23:06,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:06,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:23:06,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:23:06,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 02:23:06,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 02:23:06,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:23:06,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 02:23:06,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:23:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:23:06,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-01-19 02:36:52,018 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-19 02:36:52,020 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-01-19 02:36:52,025 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 02:36:52,025 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 02:36:52,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-19 02:36:52,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:36:52,220 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 16ms.. [2022-01-19 02:36:52,222 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-19 02:36:52,222 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-19 02:36:52,222 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-19 02:36:52,224 INFO L732 BasicCegarLoop]: Path program histogram: [9, 4, 4, 3, 1, 1] [2022-01-19 02:36:52,226 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 02:36:52,226 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 02:36:52,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 02:36:52 BasicIcfg [2022-01-19 02:36:52,228 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 02:36:52,228 INFO L158 Benchmark]: Toolchain (without parser) took 853482.69ms. Allocated memory was 398.5MB in the beginning and 1.7GB in the end (delta: 1.3GB). Free memory was 341.6MB in the beginning and 710.2MB in the end (delta: -368.6MB). Peak memory consumption was 1.2GB. Max. memory is 16.0GB. [2022-01-19 02:36:52,228 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 398.5MB. Free memory is still 358.1MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 02:36:52,228 INFO L158 Benchmark]: CACSL2BoogieTranslator took 174.01ms. Allocated memory was 398.5MB in the beginning and 545.3MB in the end (delta: 146.8MB). Free memory was 341.4MB in the beginning and 513.2MB in the end (delta: -171.8MB). Peak memory consumption was 6.7MB. Max. memory is 16.0GB. [2022-01-19 02:36:52,229 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.06ms. Allocated memory is still 545.3MB. Free memory was 513.2MB in the beginning and 512.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 02:36:52,229 INFO L158 Benchmark]: Boogie Preprocessor took 29.99ms. Allocated memory is still 545.3MB. Free memory was 512.2MB in the beginning and 510.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 02:36:52,229 INFO L158 Benchmark]: RCFGBuilder took 307.53ms. Allocated memory is still 545.3MB. Free memory was 510.1MB in the beginning and 493.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2022-01-19 02:36:52,229 INFO L158 Benchmark]: TraceAbstraction took 852935.77ms. Allocated memory was 545.3MB in the beginning and 1.7GB in the end (delta: 1.1GB). Free memory was 493.3MB in the beginning and 710.2MB in the end (delta: -216.9MB). Peak memory consumption was 1.2GB. Max. memory is 16.0GB. [2022-01-19 02:36:52,230 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 398.5MB. Free memory is still 358.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 174.01ms. Allocated memory was 398.5MB in the beginning and 545.3MB in the end (delta: 146.8MB). Free memory was 341.4MB in the beginning and 513.2MB in the end (delta: -171.8MB). Peak memory consumption was 6.7MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.06ms. Allocated memory is still 545.3MB. Free memory was 513.2MB in the beginning and 512.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.99ms. Allocated memory is still 545.3MB. Free memory was 512.2MB in the beginning and 510.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 307.53ms. Allocated memory is still 545.3MB. Free memory was 510.1MB in the beginning and 493.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 852935.77ms. Allocated memory was 545.3MB in the beginning and 1.7GB in the end (delta: 1.1GB). Free memory was 493.3MB in the beginning and 710.2MB in the end (delta: -216.9MB). Peak memory consumption was 1.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 16ms.. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 16ms.. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 16ms.. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 16ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 113 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 852.8s, OverallIterations: 22, TraceHistogramMax: 1, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 16.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 967 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 967 mSDsluCounter, 899 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 144 IncrementalHoareTripleChecker+Unchecked, 1385 mSDsCounter, 145 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2812 IncrementalHoareTripleChecker+Invalid, 3101 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 145 mSolverCounterUnsat, 237 mSDtfsCounter, 2812 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 781 GetRequests, 599 SyntacticMatches, 10 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13234occurred in iteration=21, InterpolantAutomatonStates: 158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 1896 NumberOfCodeBlocks, 1896 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 2090 ConstructedInterpolants, 27 QuantifiedInterpolants, 15204 SizeOfPredicates, 32 NumberOfNonLiveVariables, 970 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 29 InterpolantComputations, 18 PerfectInterpolantSequences, 16/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown