/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 08:45:30,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 08:45:30,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 08:45:30,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 08:45:30,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 08:45:30,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 08:45:30,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 08:45:30,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 08:45:30,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 08:45:30,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 08:45:30,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 08:45:30,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 08:45:30,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 08:45:30,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 08:45:30,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 08:45:30,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 08:45:30,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 08:45:30,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 08:45:30,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 08:45:30,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 08:45:30,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 08:45:30,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 08:45:30,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 08:45:30,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 08:45:30,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 08:45:30,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 08:45:30,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 08:45:30,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 08:45:30,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 08:45:30,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 08:45:30,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 08:45:30,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 08:45:30,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 08:45:30,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 08:45:30,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 08:45:30,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 08:45:30,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 08:45:30,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 08:45:30,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 08:45:30,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 08:45:30,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 08:45:30,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.epf [2022-01-19 08:45:31,001 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 08:45:31,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 08:45:31,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 08:45:31,002 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 08:45:31,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 08:45:31,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 08:45:31,003 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 08:45:31,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 08:45:31,003 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 08:45:31,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 08:45:31,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 08:45:31,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 08:45:31,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 08:45:31,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 08:45:31,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 08:45:31,004 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 08:45:31,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 08:45:31,005 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 08:45:31,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 08:45:31,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 08:45:31,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 08:45:31,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 08:45:31,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 08:45:31,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:45:31,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 08:45:31,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 08:45:31,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 08:45:31,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 08:45:31,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 08:45:31,007 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 08:45:31,007 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 08:45:31,007 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 08:45:31,007 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 08:45:31,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 08:45:31,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 08:45:31,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 08:45:31,247 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 08:45:31,248 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 08:45:31,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2022-01-19 08:45:31,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54cd2519a/452922fa30314de1921814c224072291/FLAG7862f0605 [2022-01-19 08:45:31,675 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 08:45:31,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2022-01-19 08:45:31,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54cd2519a/452922fa30314de1921814c224072291/FLAG7862f0605 [2022-01-19 08:45:31,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54cd2519a/452922fa30314de1921814c224072291 [2022-01-19 08:45:31,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 08:45:31,696 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 08:45:31,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 08:45:31,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 08:45:31,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 08:45:31,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:45:31" (1/1) ... [2022-01-19 08:45:31,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e44ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:45:31, skipping insertion in model container [2022-01-19 08:45:31,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:45:31" (1/1) ... [2022-01-19 08:45:31,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 08:45:31,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 08:45:31,875 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-nonblocking-cntr.wvr.c[2037,2050] [2022-01-19 08:45:31,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:45:31,883 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 08:45:31,896 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-nonblocking-cntr.wvr.c[2037,2050] [2022-01-19 08:45:31,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:45:31,906 INFO L208 MainTranslator]: Completed translation [2022-01-19 08:45:31,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:45:31 WrapperNode [2022-01-19 08:45:31,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 08:45:31,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 08:45:31,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 08:45:31,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 08:45:31,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:45:31" (1/1) ... [2022-01-19 08:45:31,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:45:31" (1/1) ... [2022-01-19 08:45:31,933 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-01-19 08:45:31,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 08:45:31,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 08:45:31,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 08:45:31,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 08:45:31,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:45:31" (1/1) ... [2022-01-19 08:45:31,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:45:31" (1/1) ... [2022-01-19 08:45:31,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:45:31" (1/1) ... [2022-01-19 08:45:31,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:45:31" (1/1) ... [2022-01-19 08:45:31,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:45:31" (1/1) ... [2022-01-19 08:45:31,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:45:31" (1/1) ... [2022-01-19 08:45:31,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:45:31" (1/1) ... [2022-01-19 08:45:31,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 08:45:31,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 08:45:31,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 08:45:31,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 08:45:31,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:45:31" (1/1) ... [2022-01-19 08:45:31,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:45:31,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:31,997 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 08:45:32,023 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 08:45:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 08:45:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 08:45:32,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 08:45:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 08:45:32,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 08:45:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 08:45:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 08:45:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 08:45:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 08:45:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 08:45:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 08:45:32,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 08:45:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 08:45:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 08:45:32,042 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 08:45:32,125 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 08:45:32,126 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 08:45:32,333 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 08:45:32,381 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 08:45:32,381 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 08:45:32,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:45:32 BoogieIcfgContainer [2022-01-19 08:45:32,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 08:45:32,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 08:45:32,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 08:45:32,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 08:45:32,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 08:45:31" (1/3) ... [2022-01-19 08:45:32,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33747863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:45:32, skipping insertion in model container [2022-01-19 08:45:32,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:45:31" (2/3) ... [2022-01-19 08:45:32,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33747863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:45:32, skipping insertion in model container [2022-01-19 08:45:32,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:45:32" (3/3) ... [2022-01-19 08:45:32,395 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-01-19 08:45:32,402 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 08:45:32,402 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 08:45:32,402 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 08:45:32,446 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,446 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,446 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,447 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,447 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,449 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,450 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,450 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,452 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,452 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,452 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,452 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,453 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,453 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,453 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,453 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,454 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,454 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,455 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,455 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,455 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,456 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,457 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,457 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,458 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,458 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,458 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,460 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,460 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,460 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,461 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,461 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,461 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,461 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,461 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,461 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,462 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,462 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,462 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,462 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,462 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,462 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,462 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,463 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,469 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,469 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,470 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,470 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,470 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,472 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,473 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,473 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,473 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,473 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:45:32,479 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 08:45:32,511 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 08:45:32,517 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 08:45:32,518 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 08:45:32,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2022-01-19 08:45:32,560 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-01-19 08:45:32,560 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:45:32,563 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-01-19 08:45:32,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2022-01-19 08:45:32,566 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-01-19 08:45:32,586 INFO L129 PetriNetUnfolder]: 6/70 cut-off events. [2022-01-19 08:45:32,587 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:45:32,587 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:32,588 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] [2022-01-19 08:45:32,588 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:32,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:32,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1700112450, now seen corresponding path program 1 times [2022-01-19 08:45:32,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:32,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229743059] [2022-01-19 08:45:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:32,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:32,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:32,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229743059] [2022-01-19 08:45:32,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229743059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:45:32,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:45:32,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 08:45:32,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410938171] [2022-01-19 08:45:32,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:45:32,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 08:45:32,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:32,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 08:45:32,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 08:45:32,847 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 82 [2022-01-19 08:45:32,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:32,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:32,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 82 [2022-01-19 08:45:32,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:32,926 INFO L129 PetriNetUnfolder]: 10/93 cut-off events. [2022-01-19 08:45:32,926 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-01-19 08:45:32,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 93 events. 10/93 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 1 based on Foata normal form. 11/94 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-01-19 08:45:32,928 INFO L132 encePairwiseOnDemand]: 78/82 looper letters, 6 selfloop transitions, 0 changer transitions 2/67 dead transitions. [2022-01-19 08:45:32,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 158 flow [2022-01-19 08:45:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 08:45:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 08:45:32,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-01-19 08:45:32,950 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.926829268292683 [2022-01-19 08:45:32,951 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-01-19 08:45:32,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-01-19 08:45:32,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:32,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-01-19 08:45:32,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:32,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:32,967 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:32,968 INFO L186 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 2 states and 152 transitions. [2022-01-19 08:45:32,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 158 flow [2022-01-19 08:45:32,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 08:45:32,980 INFO L242 Difference]: Finished difference. Result has 69 places, 65 transitions, 134 flow [2022-01-19 08:45:32,982 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-01-19 08:45:32,986 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2022-01-19 08:45:32,987 INFO L470 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 134 flow [2022-01-19 08:45:32,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:32,987 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:32,987 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] [2022-01-19 08:45:32,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 08:45:32,987 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:32,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1829195169, now seen corresponding path program 1 times [2022-01-19 08:45:32,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:32,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542224885] [2022-01-19 08:45:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:32,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:33,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:33,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542224885] [2022-01-19 08:45:33,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542224885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:45:33,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:45:33,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 08:45:33,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979248608] [2022-01-19 08:45:33,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:45:33,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:45:33,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:33,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:45:33,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-19 08:45:33,159 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 82 [2022-01-19 08:45:33,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:33,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:33,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 82 [2022-01-19 08:45:33,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:33,261 INFO L129 PetriNetUnfolder]: 64/183 cut-off events. [2022-01-19 08:45:33,261 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-01-19 08:45:33,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 183 events. 64/183 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 533 event pairs, 25 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 322. Up to 80 conditions per place. [2022-01-19 08:45:33,263 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 26 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2022-01-19 08:45:33,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 213 flow [2022-01-19 08:45:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:45:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:45:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 344 transitions. [2022-01-19 08:45:33,266 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2022-01-19 08:45:33,266 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 344 transitions. [2022-01-19 08:45:33,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 344 transitions. [2022-01-19 08:45:33,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:33,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 344 transitions. [2022-01-19 08:45:33,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:33,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:33,270 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:33,270 INFO L186 Difference]: Start difference. First operand has 69 places, 65 transitions, 134 flow. Second operand 6 states and 344 transitions. [2022-01-19 08:45:33,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 213 flow [2022-01-19 08:45:33,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 08:45:33,272 INFO L242 Difference]: Finished difference. Result has 73 places, 66 transitions, 152 flow [2022-01-19 08:45:33,272 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2022-01-19 08:45:33,273 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2022-01-19 08:45:33,273 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 152 flow [2022-01-19 08:45:33,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:33,273 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:33,273 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] [2022-01-19 08:45:33,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 08:45:33,274 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:33,274 INFO L85 PathProgramCache]: Analyzing trace with hash -332340421, now seen corresponding path program 1 times [2022-01-19 08:45:33,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:33,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010638923] [2022-01-19 08:45:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:33,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:33,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:33,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010638923] [2022-01-19 08:45:33,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010638923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:45:33,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:45:33,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:45:33,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524031796] [2022-01-19 08:45:33,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:45:33,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:45:33,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:33,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:45:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:45:33,375 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-01-19 08:45:33,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:33,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:33,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-01-19 08:45:33,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:33,518 INFO L129 PetriNetUnfolder]: 87/283 cut-off events. [2022-01-19 08:45:33,518 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-01-19 08:45:33,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 283 events. 87/283 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1086 event pairs, 37 based on Foata normal form. 1/257 useless extension candidates. Maximal degree in co-relation 517. Up to 113 conditions per place. [2022-01-19 08:45:33,521 INFO L132 encePairwiseOnDemand]: 75/82 looper letters, 32 selfloop transitions, 5 changer transitions 1/86 dead transitions. [2022-01-19 08:45:33,521 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 291 flow [2022-01-19 08:45:33,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:45:33,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:45:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2022-01-19 08:45:33,524 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-01-19 08:45:33,524 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2022-01-19 08:45:33,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2022-01-19 08:45:33,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:33,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2022-01-19 08:45:33,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:33,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:33,529 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:33,529 INFO L186 Difference]: Start difference. First operand has 73 places, 66 transitions, 152 flow. Second operand 6 states and 396 transitions. [2022-01-19 08:45:33,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 291 flow [2022-01-19 08:45:33,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 08:45:33,532 INFO L242 Difference]: Finished difference. Result has 77 places, 68 transitions, 170 flow [2022-01-19 08:45:33,532 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2022-01-19 08:45:33,533 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2022-01-19 08:45:33,533 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 170 flow [2022-01-19 08:45:33,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:33,533 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:33,533 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] [2022-01-19 08:45:33,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 08:45:33,534 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:33,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:33,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1801956563, now seen corresponding path program 2 times [2022-01-19 08:45:33,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:33,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490706268] [2022-01-19 08:45:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:33,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:33,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:33,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490706268] [2022-01-19 08:45:33,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490706268] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:33,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708986053] [2022-01-19 08:45:33,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:45:33,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:33,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:33,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:33,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 08:45:33,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-19 08:45:33,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:33,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-19 08:45:33,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:45:33,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 08:45:33,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708986053] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:45:33,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 08:45:33,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-01-19 08:45:33,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785450354] [2022-01-19 08:45:33,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:45:33,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:45:33,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:33,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:45:33,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-19 08:45:33,990 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 82 [2022-01-19 08:45:33,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:33,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:33,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 82 [2022-01-19 08:45:33,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:34,176 INFO L129 PetriNetUnfolder]: 44/166 cut-off events. [2022-01-19 08:45:34,177 INFO L130 PetriNetUnfolder]: For 50/56 co-relation queries the response was YES. [2022-01-19 08:45:34,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 166 events. 44/166 cut-off events. For 50/56 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 530 event pairs, 23 based on Foata normal form. 13/174 useless extension candidates. Maximal degree in co-relation 338. Up to 66 conditions per place. [2022-01-19 08:45:34,182 INFO L132 encePairwiseOnDemand]: 74/82 looper letters, 20 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-01-19 08:45:34,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 233 flow [2022-01-19 08:45:34,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 08:45:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 08:45:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 460 transitions. [2022-01-19 08:45:34,188 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2022-01-19 08:45:34,188 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 460 transitions. [2022-01-19 08:45:34,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 460 transitions. [2022-01-19 08:45:34,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:34,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 460 transitions. [2022-01-19 08:45:34,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 57.5) internal successors, (460), 8 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:34,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:34,194 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:34,194 INFO L186 Difference]: Start difference. First operand has 77 places, 68 transitions, 170 flow. Second operand 8 states and 460 transitions. [2022-01-19 08:45:34,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 233 flow [2022-01-19 08:45:34,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 221 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-01-19 08:45:34,200 INFO L242 Difference]: Finished difference. Result has 78 places, 67 transitions, 168 flow [2022-01-19 08:45:34,200 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2022-01-19 08:45:34,202 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2022-01-19 08:45:34,202 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 168 flow [2022-01-19 08:45:34,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:34,204 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:34,204 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:34,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:34,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:34,428 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:34,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:34,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1474269123, now seen corresponding path program 1 times [2022-01-19 08:45:34,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:34,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724928804] [2022-01-19 08:45:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:34,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:34,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:34,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724928804] [2022-01-19 08:45:34,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724928804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:34,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759764193] [2022-01-19 08:45:34,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:34,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:34,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:34,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:34,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 08:45:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:34,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-19 08:45:34,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:34,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:35,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759764193] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:35,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:35,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2022-01-19 08:45:35,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804679805] [2022-01-19 08:45:35,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:35,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 08:45:35,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:35,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 08:45:35,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-19 08:45:35,360 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-01-19 08:45:35,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:35,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:35,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-01-19 08:45:35,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:35,442 INFO L129 PetriNetUnfolder]: 17/162 cut-off events. [2022-01-19 08:45:35,442 INFO L130 PetriNetUnfolder]: For 38/44 co-relation queries the response was YES. [2022-01-19 08:45:35,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 162 events. 17/162 cut-off events. For 38/44 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 427 event pairs, 1 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 266. Up to 21 conditions per place. [2022-01-19 08:45:35,443 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 25 selfloop transitions, 5 changer transitions 5/86 dead transitions. [2022-01-19 08:45:35,443 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 302 flow [2022-01-19 08:45:35,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:45:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:45:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2022-01-19 08:45:35,446 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7987804878048781 [2022-01-19 08:45:35,446 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 393 transitions. [2022-01-19 08:45:35,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 393 transitions. [2022-01-19 08:45:35,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:35,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 393 transitions. [2022-01-19 08:45:35,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:35,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:35,448 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:35,449 INFO L186 Difference]: Start difference. First operand has 78 places, 67 transitions, 168 flow. Second operand 6 states and 393 transitions. [2022-01-19 08:45:35,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 302 flow [2022-01-19 08:45:35,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-01-19 08:45:35,456 INFO L242 Difference]: Finished difference. Result has 81 places, 71 transitions, 197 flow [2022-01-19 08:45:35,457 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2022-01-19 08:45:35,459 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2022-01-19 08:45:35,460 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 197 flow [2022-01-19 08:45:35,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:35,460 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:35,460 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:35,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:35,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:35,676 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:35,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:35,676 INFO L85 PathProgramCache]: Analyzing trace with hash 343908841, now seen corresponding path program 2 times [2022-01-19 08:45:35,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:35,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923859861] [2022-01-19 08:45:35,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:35,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:45:35,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:35,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923859861] [2022-01-19 08:45:35,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923859861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:35,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49595769] [2022-01-19 08:45:35,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:45:35,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:35,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:35,776 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:35,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 08:45:35,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:45:35,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:35,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 08:45:35,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:45:36,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:45:36,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49595769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:36,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:36,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2022-01-19 08:45:36,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131018436] [2022-01-19 08:45:36,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:36,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-19 08:45:36,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:36,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-19 08:45:36,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-19 08:45:36,185 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 82 [2022-01-19 08:45:36,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 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 08:45:36,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:36,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 82 [2022-01-19 08:45:36,186 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:36,310 INFO L129 PetriNetUnfolder]: 109/370 cut-off events. [2022-01-19 08:45:36,310 INFO L130 PetriNetUnfolder]: For 199/209 co-relation queries the response was YES. [2022-01-19 08:45:36,311 INFO L84 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 370 events. 109/370 cut-off events. For 199/209 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1754 event pairs, 24 based on Foata normal form. 15/376 useless extension candidates. Maximal degree in co-relation 819. Up to 124 conditions per place. [2022-01-19 08:45:36,313 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 34 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2022-01-19 08:45:36,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 414 flow [2022-01-19 08:45:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 08:45:36,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 08:45:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2022-01-19 08:45:36,315 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8118466898954704 [2022-01-19 08:45:36,315 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2022-01-19 08:45:36,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2022-01-19 08:45:36,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:36,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2022-01-19 08:45:36,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:36,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:36,318 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:36,318 INFO L186 Difference]: Start difference. First operand has 81 places, 71 transitions, 197 flow. Second operand 7 states and 466 transitions. [2022-01-19 08:45:36,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 414 flow [2022-01-19 08:45:36,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 99 transitions, 410 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-01-19 08:45:36,322 INFO L242 Difference]: Finished difference. Result has 88 places, 84 transitions, 338 flow [2022-01-19 08:45:36,322 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2022-01-19 08:45:36,323 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 16 predicate places. [2022-01-19 08:45:36,323 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 338 flow [2022-01-19 08:45:36,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 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 08:45:36,323 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:36,324 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:36,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:36,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:36,549 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:36,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:36,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2134643199, now seen corresponding path program 3 times [2022-01-19 08:45:36,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:36,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682251950] [2022-01-19 08:45:36,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:36,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:36,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:36,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682251950] [2022-01-19 08:45:36,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682251950] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:36,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782286548] [2022-01-19 08:45:36,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:45:36,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:36,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:36,665 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:36,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 08:45:36,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 08:45:36,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:36,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:45:36,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:37,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:37,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782286548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:37,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:37,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-19 08:45:37,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272398019] [2022-01-19 08:45:37,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:37,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 08:45:37,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:37,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 08:45:37,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-01-19 08:45:37,203 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:45:37,204 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 338 flow. Second operand has 22 states, 22 states have (on average 59.54545454545455) internal successors, (1310), 22 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:37,204 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:37,204 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:45:37,204 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:38,966 INFO L129 PetriNetUnfolder]: 341/932 cut-off events. [2022-01-19 08:45:38,966 INFO L130 PetriNetUnfolder]: For 1529/1529 co-relation queries the response was YES. [2022-01-19 08:45:38,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2756 conditions, 932 events. 341/932 cut-off events. For 1529/1529 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5212 event pairs, 6 based on Foata normal form. 29/961 useless extension candidates. Maximal degree in co-relation 2743. Up to 175 conditions per place. [2022-01-19 08:45:38,974 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 126 selfloop transitions, 180 changer transitions 9/360 dead transitions. [2022-01-19 08:45:38,974 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 360 transitions, 2526 flow [2022-01-19 08:45:38,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-19 08:45:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-01-19 08:45:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4205 transitions. [2022-01-19 08:45:38,983 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7431954754330152 [2022-01-19 08:45:38,983 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4205 transitions. [2022-01-19 08:45:38,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4205 transitions. [2022-01-19 08:45:38,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:38,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4205 transitions. [2022-01-19 08:45:38,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 60.94202898550725) internal successors, (4205), 69 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:39,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 82.0) internal successors, (5740), 70 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:39,006 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 82.0) internal successors, (5740), 70 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:39,006 INFO L186 Difference]: Start difference. First operand has 88 places, 84 transitions, 338 flow. Second operand 69 states and 4205 transitions. [2022-01-19 08:45:39,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 360 transitions, 2526 flow [2022-01-19 08:45:39,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 360 transitions, 2514 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-01-19 08:45:39,017 INFO L242 Difference]: Finished difference. Result has 191 places, 245 transitions, 1966 flow [2022-01-19 08:45:39,017 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=1966, PETRI_PLACES=191, PETRI_TRANSITIONS=245} [2022-01-19 08:45:39,018 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 119 predicate places. [2022-01-19 08:45:39,018 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 245 transitions, 1966 flow [2022-01-19 08:45:39,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.54545454545455) internal successors, (1310), 22 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:39,018 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:39,019 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:39,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-19 08:45:39,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:39,231 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:39,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:39,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1525353727, now seen corresponding path program 4 times [2022-01-19 08:45:39,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:39,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266871718] [2022-01-19 08:45:39,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:39,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:39,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:39,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266871718] [2022-01-19 08:45:39,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266871718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:39,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184716509] [2022-01-19 08:45:39,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:45:39,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:39,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:39,341 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:39,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 08:45:39,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:45:39,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:39,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-19 08:45:39,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:39,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:39,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184716509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:39,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:39,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-01-19 08:45:39,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337170019] [2022-01-19 08:45:39,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:39,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-19 08:45:39,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:39,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-19 08:45:39,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-01-19 08:45:39,965 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:45:39,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 245 transitions, 1966 flow. Second operand has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:39,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:39,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:45:39,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:40,999 INFO L129 PetriNetUnfolder]: 521/1415 cut-off events. [2022-01-19 08:45:40,999 INFO L130 PetriNetUnfolder]: For 34642/34642 co-relation queries the response was YES. [2022-01-19 08:45:41,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8020 conditions, 1415 events. 521/1415 cut-off events. For 34642/34642 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 9192 event pairs, 4 based on Foata normal form. 31/1445 useless extension candidates. Maximal degree in co-relation 7971. Up to 290 conditions per place. [2022-01-19 08:45:41,021 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 157 selfloop transitions, 287 changer transitions 7/496 dead transitions. [2022-01-19 08:45:41,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 496 transitions, 5587 flow [2022-01-19 08:45:41,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 08:45:41,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 08:45:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2387 transitions. [2022-01-19 08:45:41,025 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7464040025015635 [2022-01-19 08:45:41,025 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2387 transitions. [2022-01-19 08:45:41,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2387 transitions. [2022-01-19 08:45:41,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:41,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2387 transitions. [2022-01-19 08:45:41,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 61.205128205128204) internal successors, (2387), 39 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:41,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:41,042 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:41,042 INFO L186 Difference]: Start difference. First operand has 191 places, 245 transitions, 1966 flow. Second operand 39 states and 2387 transitions. [2022-01-19 08:45:41,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 496 transitions, 5587 flow [2022-01-19 08:45:41,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 496 transitions, 5042 flow, removed 195 selfloop flow, removed 5 redundant places. [2022-01-19 08:45:41,121 INFO L242 Difference]: Finished difference. Result has 237 places, 404 transitions, 4532 flow [2022-01-19 08:45:41,122 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4532, PETRI_PLACES=237, PETRI_TRANSITIONS=404} [2022-01-19 08:45:41,123 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 165 predicate places. [2022-01-19 08:45:41,124 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 404 transitions, 4532 flow [2022-01-19 08:45:41,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:41,124 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:41,125 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:41,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:41,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:41,347 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:41,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:41,348 INFO L85 PathProgramCache]: Analyzing trace with hash -360678591, now seen corresponding path program 5 times [2022-01-19 08:45:41,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:41,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151839212] [2022-01-19 08:45:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:41,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:41,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:41,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151839212] [2022-01-19 08:45:41,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151839212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:41,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173046440] [2022-01-19 08:45:41,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:45:41,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:41,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:41,445 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:41,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 08:45:41,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 08:45:41,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:41,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:45:41,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:41,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:41,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173046440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:41,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:41,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-19 08:45:41,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486059652] [2022-01-19 08:45:41,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:41,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 08:45:41,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:41,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 08:45:41,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-19 08:45:41,883 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:45:41,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 404 transitions, 4532 flow. Second operand has 20 states, 20 states have (on average 59.25) internal successors, (1185), 20 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:41,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:41,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:45:41,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:43,490 INFO L129 PetriNetUnfolder]: 708/2090 cut-off events. [2022-01-19 08:45:43,490 INFO L130 PetriNetUnfolder]: For 52169/52169 co-relation queries the response was YES. [2022-01-19 08:45:43,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12315 conditions, 2090 events. 708/2090 cut-off events. For 52169/52169 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15982 event pairs, 13 based on Foata normal form. 31/2113 useless extension candidates. Maximal degree in co-relation 12254. Up to 360 conditions per place. [2022-01-19 08:45:43,521 INFO L132 encePairwiseOnDemand]: 69/82 looper letters, 233 selfloop transitions, 439 changer transitions 19/736 dead transitions. [2022-01-19 08:45:43,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 736 transitions, 9640 flow [2022-01-19 08:45:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-19 08:45:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-01-19 08:45:43,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 4073 transitions. [2022-01-19 08:45:43,529 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.741354204586822 [2022-01-19 08:45:43,529 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 4073 transitions. [2022-01-19 08:45:43,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 4073 transitions. [2022-01-19 08:45:43,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:43,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 4073 transitions. [2022-01-19 08:45:43,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 60.791044776119406) internal successors, (4073), 67 states have internal predecessors, (4073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:43,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 82.0) internal successors, (5576), 68 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:43,545 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 82.0) internal successors, (5576), 68 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:43,546 INFO L186 Difference]: Start difference. First operand has 237 places, 404 transitions, 4532 flow. Second operand 67 states and 4073 transitions. [2022-01-19 08:45:43,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 736 transitions, 9640 flow [2022-01-19 08:45:43,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 736 transitions, 8645 flow, removed 472 selfloop flow, removed 9 redundant places. [2022-01-19 08:45:43,729 INFO L242 Difference]: Finished difference. Result has 317 places, 592 transitions, 7602 flow [2022-01-19 08:45:43,730 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=7602, PETRI_PLACES=317, PETRI_TRANSITIONS=592} [2022-01-19 08:45:43,730 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 245 predicate places. [2022-01-19 08:45:43,730 INFO L470 AbstractCegarLoop]: Abstraction has has 317 places, 592 transitions, 7602 flow [2022-01-19 08:45:43,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.25) internal successors, (1185), 20 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:43,731 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:43,731 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:43,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:43,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:43,954 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:43,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:43,954 INFO L85 PathProgramCache]: Analyzing trace with hash 545089743, now seen corresponding path program 6 times [2022-01-19 08:45:43,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:43,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723720382] [2022-01-19 08:45:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:43,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:44,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:44,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723720382] [2022-01-19 08:45:44,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723720382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:44,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708627736] [2022-01-19 08:45:44,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:45:44,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:44,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:44,044 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:44,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 08:45:44,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 08:45:44,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:44,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:45:44,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:44,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:44,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708627736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:44,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:44,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-19 08:45:44,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677980312] [2022-01-19 08:45:44,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:44,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 08:45:44,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:44,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 08:45:44,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-19 08:45:44,577 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:45:44,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 592 transitions, 7602 flow. Second operand has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:44,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:44,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:45:44,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:45,921 INFO L129 PetriNetUnfolder]: 840/2479 cut-off events. [2022-01-19 08:45:45,921 INFO L130 PetriNetUnfolder]: For 42171/42171 co-relation queries the response was YES. [2022-01-19 08:45:45,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14619 conditions, 2479 events. 840/2479 cut-off events. For 42171/42171 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19867 event pairs, 14 based on Foata normal form. 1/2476 useless extension candidates. Maximal degree in co-relation 14537. Up to 440 conditions per place. [2022-01-19 08:45:45,963 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 321 selfloop transitions, 521 changer transitions 17/904 dead transitions. [2022-01-19 08:45:45,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 904 transitions, 13698 flow [2022-01-19 08:45:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 08:45:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 08:45:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2515 transitions. [2022-01-19 08:45:45,968 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7480666270077335 [2022-01-19 08:45:45,968 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2515 transitions. [2022-01-19 08:45:45,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2515 transitions. [2022-01-19 08:45:45,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:45,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2515 transitions. [2022-01-19 08:45:45,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.34146341463415) internal successors, (2515), 41 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:45,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:45,990 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:45,990 INFO L186 Difference]: Start difference. First operand has 317 places, 592 transitions, 7602 flow. Second operand 41 states and 2515 transitions. [2022-01-19 08:45:45,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 904 transitions, 13698 flow [2022-01-19 08:45:46,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 904 transitions, 13001 flow, removed 213 selfloop flow, removed 28 redundant places. [2022-01-19 08:45:46,272 INFO L242 Difference]: Finished difference. Result has 337 places, 752 transitions, 10690 flow [2022-01-19 08:45:46,274 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=7057, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=10690, PETRI_PLACES=337, PETRI_TRANSITIONS=752} [2022-01-19 08:45:46,274 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 265 predicate places. [2022-01-19 08:45:46,274 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 752 transitions, 10690 flow [2022-01-19 08:45:46,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:46,275 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:46,275 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:46,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:46,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:46,493 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:46,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:46,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1852758055, now seen corresponding path program 7 times [2022-01-19 08:45:46,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:46,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435312384] [2022-01-19 08:45:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:46,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:46,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:46,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435312384] [2022-01-19 08:45:46,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435312384] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:46,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533977975] [2022-01-19 08:45:46,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:45:46,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:46,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:46,599 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:46,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 08:45:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:46,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:45:46,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:46,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:47,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533977975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:47,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:47,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 08:45:47,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205030558] [2022-01-19 08:45:47,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:47,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 08:45:47,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 08:45:47,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-01-19 08:45:47,102 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:45:47,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 752 transitions, 10690 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:47,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:47,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:45:47,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:48,127 INFO L129 PetriNetUnfolder]: 845/2466 cut-off events. [2022-01-19 08:45:48,128 INFO L130 PetriNetUnfolder]: For 42610/42610 co-relation queries the response was YES. [2022-01-19 08:45:48,149 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15250 conditions, 2466 events. 845/2466 cut-off events. For 42610/42610 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19553 event pairs, 67 based on Foata normal form. 1/2429 useless extension candidates. Maximal degree in co-relation 15164. Up to 440 conditions per place. [2022-01-19 08:45:48,167 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 334 selfloop transitions, 444 changer transitions 7/830 dead transitions. [2022-01-19 08:45:48,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 830 transitions, 13357 flow [2022-01-19 08:45:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-19 08:45:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-01-19 08:45:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1296 transitions. [2022-01-19 08:45:48,170 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7526132404181185 [2022-01-19 08:45:48,170 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1296 transitions. [2022-01-19 08:45:48,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1296 transitions. [2022-01-19 08:45:48,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:48,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1296 transitions. [2022-01-19 08:45:48,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:48,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:48,177 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:48,177 INFO L186 Difference]: Start difference. First operand has 337 places, 752 transitions, 10690 flow. Second operand 21 states and 1296 transitions. [2022-01-19 08:45:48,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 830 transitions, 13357 flow [2022-01-19 08:45:48,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 830 transitions, 13013 flow, removed 61 selfloop flow, removed 17 redundant places. [2022-01-19 08:45:48,465 INFO L242 Difference]: Finished difference. Result has 341 places, 778 transitions, 11704 flow [2022-01-19 08:45:48,466 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=10399, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11704, PETRI_PLACES=341, PETRI_TRANSITIONS=778} [2022-01-19 08:45:48,467 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 269 predicate places. [2022-01-19 08:45:48,467 INFO L470 AbstractCegarLoop]: Abstraction has has 341 places, 778 transitions, 11704 flow [2022-01-19 08:45:48,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:48,468 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:48,468 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:48,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:48,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-19 08:45:48,690 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:48,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:48,691 INFO L85 PathProgramCache]: Analyzing trace with hash 951866337, now seen corresponding path program 8 times [2022-01-19 08:45:48,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:48,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120223764] [2022-01-19 08:45:48,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:48,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:48,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:48,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120223764] [2022-01-19 08:45:48,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120223764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:48,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393150779] [2022-01-19 08:45:48,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:45:48,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:48,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:48,796 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:48,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 08:45:48,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:45:48,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:48,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:45:48,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:49,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:49,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393150779] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:49,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:49,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-01-19 08:45:49,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260001780] [2022-01-19 08:45:49,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:49,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 08:45:49,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:49,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 08:45:49,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-01-19 08:45:49,327 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:45:49,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 778 transitions, 11704 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:49,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:49,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:45:49,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:51,085 INFO L129 PetriNetUnfolder]: 1271/3799 cut-off events. [2022-01-19 08:45:51,085 INFO L130 PetriNetUnfolder]: For 74367/74367 co-relation queries the response was YES. [2022-01-19 08:45:51,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24503 conditions, 3799 events. 1271/3799 cut-off events. For 74367/74367 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 33369 event pairs, 40 based on Foata normal form. 9/3789 useless extension candidates. Maximal degree in co-relation 24417. Up to 627 conditions per place. [2022-01-19 08:45:51,134 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 442 selfloop transitions, 810 changer transitions 14/1311 dead transitions. [2022-01-19 08:45:51,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1311 transitions, 22568 flow [2022-01-19 08:45:51,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-19 08:45:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-01-19 08:45:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2719 transitions. [2022-01-19 08:45:51,138 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7536031042128604 [2022-01-19 08:45:51,138 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2719 transitions. [2022-01-19 08:45:51,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2719 transitions. [2022-01-19 08:45:51,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:51,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2719 transitions. [2022-01-19 08:45:51,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 61.79545454545455) internal successors, (2719), 44 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:51,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 82.0) internal successors, (3690), 45 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:51,146 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 82.0) internal successors, (3690), 45 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:51,146 INFO L186 Difference]: Start difference. First operand has 341 places, 778 transitions, 11704 flow. Second operand 44 states and 2719 transitions. [2022-01-19 08:45:51,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1311 transitions, 22568 flow [2022-01-19 08:45:51,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1311 transitions, 21718 flow, removed 48 selfloop flow, removed 8 redundant places. [2022-01-19 08:45:51,625 INFO L242 Difference]: Finished difference. Result has 394 places, 1095 transitions, 19168 flow [2022-01-19 08:45:51,626 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=11175, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=19168, PETRI_PLACES=394, PETRI_TRANSITIONS=1095} [2022-01-19 08:45:51,626 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 322 predicate places. [2022-01-19 08:45:51,627 INFO L470 AbstractCegarLoop]: Abstraction has has 394 places, 1095 transitions, 19168 flow [2022-01-19 08:45:51,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:51,627 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:51,627 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:51,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:51,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:51,828 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:51,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1520867889, now seen corresponding path program 9 times [2022-01-19 08:45:51,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:51,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654933485] [2022-01-19 08:45:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:51,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:51,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:51,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654933485] [2022-01-19 08:45:51,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654933485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:51,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741067732] [2022-01-19 08:45:51,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:45:51,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:51,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:51,922 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:51,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 08:45:51,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 08:45:51,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:51,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:45:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:52,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:52,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741067732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:52,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:52,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-01-19 08:45:52,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817773100] [2022-01-19 08:45:52,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:52,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 08:45:52,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:52,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 08:45:52,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-01-19 08:45:52,492 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:45:52,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1095 transitions, 19168 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:52,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:52,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:45:52,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:54,796 INFO L129 PetriNetUnfolder]: 1238/3666 cut-off events. [2022-01-19 08:45:54,796 INFO L130 PetriNetUnfolder]: For 104324/104324 co-relation queries the response was YES. [2022-01-19 08:45:54,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25742 conditions, 3666 events. 1238/3666 cut-off events. For 104324/104324 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 31973 event pairs, 43 based on Foata normal form. 43/3692 useless extension candidates. Maximal degree in co-relation 25637. Up to 653 conditions per place. [2022-01-19 08:45:54,848 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 296 selfloop transitions, 970 changer transitions 3/1314 dead transitions. [2022-01-19 08:45:54,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 1314 transitions, 24260 flow [2022-01-19 08:45:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-19 08:45:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-01-19 08:45:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3835 transitions. [2022-01-19 08:45:54,853 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7423538521099496 [2022-01-19 08:45:54,853 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3835 transitions. [2022-01-19 08:45:54,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3835 transitions. [2022-01-19 08:45:54,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:54,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3835 transitions. [2022-01-19 08:45:54,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.87301587301587) internal successors, (3835), 63 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:54,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:54,864 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:54,864 INFO L186 Difference]: Start difference. First operand has 394 places, 1095 transitions, 19168 flow. Second operand 63 states and 3835 transitions. [2022-01-19 08:45:54,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 1314 transitions, 24260 flow [2022-01-19 08:45:55,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1314 transitions, 23605 flow, removed 111 selfloop flow, removed 20 redundant places. [2022-01-19 08:45:55,567 INFO L242 Difference]: Finished difference. Result has 442 places, 1183 transitions, 22741 flow [2022-01-19 08:45:55,568 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17960, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=861, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=22741, PETRI_PLACES=442, PETRI_TRANSITIONS=1183} [2022-01-19 08:45:55,569 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 370 predicate places. [2022-01-19 08:45:55,569 INFO L470 AbstractCegarLoop]: Abstraction has has 442 places, 1183 transitions, 22741 flow [2022-01-19 08:45:55,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:55,569 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:55,569 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:55,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-19 08:45:55,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 08:45:55,783 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:55,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:55,784 INFO L85 PathProgramCache]: Analyzing trace with hash 125780809, now seen corresponding path program 10 times [2022-01-19 08:45:55,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:55,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055524138] [2022-01-19 08:45:55,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:55,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:55,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:55,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055524138] [2022-01-19 08:45:55,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055524138] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:55,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699391396] [2022-01-19 08:45:55,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:45:55,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:55,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:55,877 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:55,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 08:45:55,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:45:55,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:55,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:45:55,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:56,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:56,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699391396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:56,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:56,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 08:45:56,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675434896] [2022-01-19 08:45:56,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:56,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 08:45:56,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:56,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 08:45:56,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-01-19 08:45:56,438 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:45:56,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1183 transitions, 22741 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:56,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:56,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:45:56,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:58,028 INFO L129 PetriNetUnfolder]: 1261/3731 cut-off events. [2022-01-19 08:45:58,028 INFO L130 PetriNetUnfolder]: For 100950/100950 co-relation queries the response was YES. [2022-01-19 08:45:58,057 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28542 conditions, 3731 events. 1261/3731 cut-off events. For 100950/100950 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 32766 event pairs, 42 based on Foata normal form. 1/3722 useless extension candidates. Maximal degree in co-relation 28430. Up to 1723 conditions per place. [2022-01-19 08:45:58,082 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 971 selfloop transitions, 229 changer transitions 8/1253 dead transitions. [2022-01-19 08:45:58,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1253 transitions, 26303 flow [2022-01-19 08:45:58,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 08:45:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 08:45:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1104 transitions. [2022-01-19 08:45:58,084 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7479674796747967 [2022-01-19 08:45:58,084 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1104 transitions. [2022-01-19 08:45:58,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1104 transitions. [2022-01-19 08:45:58,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:58,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1104 transitions. [2022-01-19 08:45:58,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.333333333333336) internal successors, (1104), 18 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:58,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:58,087 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:58,088 INFO L186 Difference]: Start difference. First operand has 442 places, 1183 transitions, 22741 flow. Second operand 18 states and 1104 transitions. [2022-01-19 08:45:58,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1253 transitions, 26303 flow [2022-01-19 08:45:58,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1253 transitions, 25567 flow, removed 74 selfloop flow, removed 37 redundant places. [2022-01-19 08:45:58,824 INFO L242 Difference]: Finished difference. Result has 427 places, 1215 transitions, 23399 flow [2022-01-19 08:45:58,825 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=22038, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=968, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=23399, PETRI_PLACES=427, PETRI_TRANSITIONS=1215} [2022-01-19 08:45:58,825 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 355 predicate places. [2022-01-19 08:45:58,826 INFO L470 AbstractCegarLoop]: Abstraction has has 427 places, 1215 transitions, 23399 flow [2022-01-19 08:45:58,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:58,826 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:58,826 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:58,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:59,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 08:45:59,049 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:59,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:59,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1670132595, now seen corresponding path program 11 times [2022-01-19 08:45:59,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:59,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554440446] [2022-01-19 08:45:59,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:59,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:59,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:59,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554440446] [2022-01-19 08:45:59,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554440446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:59,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64503806] [2022-01-19 08:45:59,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:45:59,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:59,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:59,142 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:59,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 08:45:59,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 08:45:59,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:59,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:45:59,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:59,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:59,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64503806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:59,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:59,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-19 08:45:59,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204701614] [2022-01-19 08:45:59,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:59,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 08:45:59,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:59,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 08:45:59,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-19 08:45:59,597 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:45:59,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 1215 transitions, 23399 flow. Second operand has 22 states, 22 states have (on average 59.13636363636363) internal successors, (1301), 22 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:59,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:59,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:45:59,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:46:02,663 INFO L129 PetriNetUnfolder]: 1964/5682 cut-off events. [2022-01-19 08:46:02,663 INFO L130 PetriNetUnfolder]: For 162863/162863 co-relation queries the response was YES. [2022-01-19 08:46:02,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44476 conditions, 5682 events. 1964/5682 cut-off events. For 162863/162863 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 54407 event pairs, 55 based on Foata normal form. 4/5679 useless extension candidates. Maximal degree in co-relation 44360. Up to 1701 conditions per place. [2022-01-19 08:46:02,860 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 890 selfloop transitions, 1200 changer transitions 16/2151 dead transitions. [2022-01-19 08:46:02,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 2151 transitions, 46091 flow [2022-01-19 08:46:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-19 08:46:02,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-01-19 08:46:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3579 transitions. [2022-01-19 08:46:02,864 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7397684993799091 [2022-01-19 08:46:02,864 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3579 transitions. [2022-01-19 08:46:02,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3579 transitions. [2022-01-19 08:46:02,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:46:02,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3579 transitions. [2022-01-19 08:46:02,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 60.66101694915254) internal successors, (3579), 59 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:02,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:02,874 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:02,874 INFO L186 Difference]: Start difference. First operand has 427 places, 1215 transitions, 23399 flow. Second operand 59 states and 3579 transitions. [2022-01-19 08:46:02,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 2151 transitions, 46091 flow [2022-01-19 08:46:04,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 2151 transitions, 45457 flow, removed 119 selfloop flow, removed 9 redundant places. [2022-01-19 08:46:04,290 INFO L242 Difference]: Finished difference. Result has 497 places, 1947 transitions, 43725 flow [2022-01-19 08:46:04,291 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=23064, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=43725, PETRI_PLACES=497, PETRI_TRANSITIONS=1947} [2022-01-19 08:46:04,291 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 425 predicate places. [2022-01-19 08:46:04,291 INFO L470 AbstractCegarLoop]: Abstraction has has 497 places, 1947 transitions, 43725 flow [2022-01-19 08:46:04,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.13636363636363) internal successors, (1301), 22 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:04,291 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:46:04,292 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:46:04,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-19 08:46:04,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 08:46:04,492 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:46:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:46:04,493 INFO L85 PathProgramCache]: Analyzing trace with hash -534521583, now seen corresponding path program 12 times [2022-01-19 08:46:04,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:46:04,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074770834] [2022-01-19 08:46:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:46:04,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:46:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:46:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:04,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:46:04,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074770834] [2022-01-19 08:46:04,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074770834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:46:04,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33783016] [2022-01-19 08:46:04,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:46:04,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:46:04,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:46:04,581 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:46:04,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 08:46:04,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 08:46:04,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:46:04,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:46:04,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:46:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:04,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:46:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:05,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33783016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:46:05,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:46:05,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 08:46:05,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680757796] [2022-01-19 08:46:05,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:46:05,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 08:46:05,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:46:05,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 08:46:05,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-01-19 08:46:05,110 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:46:05,111 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1947 transitions, 43725 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:05,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:46:05,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:46:05,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:46:11,150 INFO L129 PetriNetUnfolder]: 3075/9213 cut-off events. [2022-01-19 08:46:11,150 INFO L130 PetriNetUnfolder]: For 387993/387993 co-relation queries the response was YES. [2022-01-19 08:46:11,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81817 conditions, 9213 events. 3075/9213 cut-off events. For 387993/387993 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 98488 event pairs, 161 based on Foata normal form. 10/9195 useless extension candidates. Maximal degree in co-relation 81681. Up to 2630 conditions per place. [2022-01-19 08:46:11,386 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1892 selfloop transitions, 1233 changer transitions 12/3182 dead transitions. [2022-01-19 08:46:11,387 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 3182 transitions, 78357 flow [2022-01-19 08:46:11,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-19 08:46:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-01-19 08:46:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3735 transitions. [2022-01-19 08:46:11,393 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7467013194722111 [2022-01-19 08:46:11,394 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3735 transitions. [2022-01-19 08:46:11,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3735 transitions. [2022-01-19 08:46:11,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:46:11,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3735 transitions. [2022-01-19 08:46:11,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 61.22950819672131) internal successors, (3735), 61 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:11,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:11,411 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:11,411 INFO L186 Difference]: Start difference. First operand has 497 places, 1947 transitions, 43725 flow. Second operand 61 states and 3735 transitions. [2022-01-19 08:46:11,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 3182 transitions, 78357 flow [2022-01-19 08:46:15,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 3182 transitions, 76856 flow, removed 283 selfloop flow, removed 15 redundant places. [2022-01-19 08:46:15,916 INFO L242 Difference]: Finished difference. Result has 569 places, 2811 transitions, 68554 flow [2022-01-19 08:46:15,918 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=42793, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1947, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=68554, PETRI_PLACES=569, PETRI_TRANSITIONS=2811} [2022-01-19 08:46:15,918 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 497 predicate places. [2022-01-19 08:46:15,918 INFO L470 AbstractCegarLoop]: Abstraction has has 569 places, 2811 transitions, 68554 flow [2022-01-19 08:46:15,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:15,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:46:15,919 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:46:15,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 08:46:16,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-19 08:46:16,136 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:46:16,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:46:16,136 INFO L85 PathProgramCache]: Analyzing trace with hash -87816547, now seen corresponding path program 13 times [2022-01-19 08:46:16,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:46:16,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118071476] [2022-01-19 08:46:16,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:46:16,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:46:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:46:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:16,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:46:16,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118071476] [2022-01-19 08:46:16,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118071476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:46:16,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050162422] [2022-01-19 08:46:16,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:46:16,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:46:16,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:46:16,223 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:46:16,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 08:46:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:46:16,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:46:16,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:46:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:16,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:46:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:16,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050162422] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:46:16,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:46:16,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-01-19 08:46:16,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131068221] [2022-01-19 08:46:16,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:46:16,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 08:46:16,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:46:16,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 08:46:16,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-01-19 08:46:16,702 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:46:16,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 2811 transitions, 68554 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:16,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:46:16,703 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:46:16,703 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:46:27,299 INFO L129 PetriNetUnfolder]: 3996/12303 cut-off events. [2022-01-19 08:46:27,299 INFO L130 PetriNetUnfolder]: For 803620/803620 co-relation queries the response was YES. [2022-01-19 08:46:27,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120373 conditions, 12303 events. 3996/12303 cut-off events. For 803620/803620 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 139657 event pairs, 207 based on Foata normal form. 16/12270 useless extension candidates. Maximal degree in co-relation 120210. Up to 2477 conditions per place. [2022-01-19 08:46:27,528 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1820 selfloop transitions, 1820 changer transitions 12/3697 dead transitions. [2022-01-19 08:46:27,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 3697 transitions, 96925 flow [2022-01-19 08:46:27,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-19 08:46:27,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-01-19 08:46:27,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2793 transitions. [2022-01-19 08:46:27,531 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7569105691056911 [2022-01-19 08:46:27,531 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2793 transitions. [2022-01-19 08:46:27,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2793 transitions. [2022-01-19 08:46:27,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:46:27,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2793 transitions. [2022-01-19 08:46:27,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.06666666666667) internal successors, (2793), 45 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:27,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 82.0) internal successors, (3772), 46 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:27,540 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 82.0) internal successors, (3772), 46 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:27,540 INFO L186 Difference]: Start difference. First operand has 569 places, 2811 transitions, 68554 flow. Second operand 45 states and 2793 transitions. [2022-01-19 08:46:27,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 3697 transitions, 96925 flow [2022-01-19 08:46:37,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 3697 transitions, 95547 flow, removed 578 selfloop flow, removed 16 redundant places. [2022-01-19 08:46:37,502 INFO L242 Difference]: Finished difference. Result has 619 places, 3408 transitions, 89268 flow [2022-01-19 08:46:37,505 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=67494, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=89268, PETRI_PLACES=619, PETRI_TRANSITIONS=3408} [2022-01-19 08:46:37,506 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 547 predicate places. [2022-01-19 08:46:37,506 INFO L470 AbstractCegarLoop]: Abstraction has has 619 places, 3408 transitions, 89268 flow [2022-01-19 08:46:37,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:37,506 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:46:37,506 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:46:37,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 08:46:37,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:46:37,719 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:46:37,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:46:37,720 INFO L85 PathProgramCache]: Analyzing trace with hash 60354813, now seen corresponding path program 14 times [2022-01-19 08:46:37,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:46:37,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489327951] [2022-01-19 08:46:37,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:46:37,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:46:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:46:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:37,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:46:37,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489327951] [2022-01-19 08:46:37,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489327951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:46:37,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281620319] [2022-01-19 08:46:37,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:46:37,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:46:37,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:46:37,801 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:46:37,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 08:46:37,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:46:37,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:46:37,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:46:37,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:46:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:38,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:46:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:38,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281620319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:46:38,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:46:38,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-01-19 08:46:38,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823075764] [2022-01-19 08:46:38,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:46:38,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 08:46:38,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:46:38,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 08:46:38,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-01-19 08:46:38,214 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:46:38,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 3408 transitions, 89268 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:38,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:46:38,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:46:38,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:46:51,517 INFO L129 PetriNetUnfolder]: 3998/12378 cut-off events. [2022-01-19 08:46:51,517 INFO L130 PetriNetUnfolder]: For 1010473/1010473 co-relation queries the response was YES. [2022-01-19 08:46:51,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127909 conditions, 12378 events. 3998/12378 cut-off events. For 1010473/1010473 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 140643 event pairs, 239 based on Foata normal form. 79/12418 useless extension candidates. Maximal degree in co-relation 127724. Up to 2342 conditions per place. [2022-01-19 08:46:51,753 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1011 selfloop transitions, 2651 changer transitions 6/3713 dead transitions. [2022-01-19 08:46:51,753 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 3713 transitions, 103012 flow [2022-01-19 08:46:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-19 08:46:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-01-19 08:46:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3626 transitions. [2022-01-19 08:46:51,755 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7494832575444399 [2022-01-19 08:46:51,755 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3626 transitions. [2022-01-19 08:46:51,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3626 transitions. [2022-01-19 08:46:51,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:46:51,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3626 transitions. [2022-01-19 08:46:51,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 61.45762711864407) internal successors, (3626), 59 states have internal predecessors, (3626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:51,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:51,764 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:51,765 INFO L186 Difference]: Start difference. First operand has 619 places, 3408 transitions, 89268 flow. Second operand 59 states and 3626 transitions. [2022-01-19 08:46:51,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 3713 transitions, 103012 flow [2022-01-19 08:47:02,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 3713 transitions, 102112 flow, removed 355 selfloop flow, removed 18 redundant places. [2022-01-19 08:47:02,323 INFO L242 Difference]: Finished difference. Result has 659 places, 3518 transitions, 98869 flow [2022-01-19 08:47:02,325 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=87253, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=815, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=98869, PETRI_PLACES=659, PETRI_TRANSITIONS=3518} [2022-01-19 08:47:02,325 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 587 predicate places. [2022-01-19 08:47:02,325 INFO L470 AbstractCegarLoop]: Abstraction has has 659 places, 3518 transitions, 98869 flow [2022-01-19 08:47:02,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:02,326 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:47:02,326 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:47:02,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-19 08:47:02,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-19 08:47:02,526 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:47:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:47:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash -490468571, now seen corresponding path program 15 times [2022-01-19 08:47:02,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:47:02,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7345748] [2022-01-19 08:47:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:47:02,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:47:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:47:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:02,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:47:02,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7345748] [2022-01-19 08:47:02,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7345748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:47:02,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857048871] [2022-01-19 08:47:02,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:47:02,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:47:02,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:47:02,635 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:47:02,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-19 08:47:02,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 08:47:02,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:47:02,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:47:02,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:47:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:02,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:47:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:03,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857048871] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:47:03,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:47:03,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-19 08:47:03,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904485893] [2022-01-19 08:47:03,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:47:03,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 08:47:03,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:47:03,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 08:47:03,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-01-19 08:47:03,061 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:47:03,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 3518 transitions, 98869 flow. Second operand has 23 states, 23 states have (on average 59.69565217391305) internal successors, (1373), 23 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:03,062 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:47:03,062 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:47:03,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:47:18,392 INFO L129 PetriNetUnfolder]: 4261/12974 cut-off events. [2022-01-19 08:47:18,392 INFO L130 PetriNetUnfolder]: For 1168799/1168799 co-relation queries the response was YES. [2022-01-19 08:47:18,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141342 conditions, 12974 events. 4261/12974 cut-off events. For 1168799/1168799 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 147393 event pairs, 207 based on Foata normal form. 120/13076 useless extension candidates. Maximal degree in co-relation 141153. Up to 4339 conditions per place. [2022-01-19 08:47:18,645 INFO L132 encePairwiseOnDemand]: 69/82 looper letters, 1435 selfloop transitions, 2489 changer transitions 16/3985 dead transitions. [2022-01-19 08:47:18,646 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 3985 transitions, 118073 flow [2022-01-19 08:47:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-19 08:47:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-01-19 08:47:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2495 transitions. [2022-01-19 08:47:18,647 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.760670731707317 [2022-01-19 08:47:18,648 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2495 transitions. [2022-01-19 08:47:18,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2495 transitions. [2022-01-19 08:47:18,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:47:18,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2495 transitions. [2022-01-19 08:47:18,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 62.375) internal successors, (2495), 40 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:18,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 82.0) internal successors, (3362), 41 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:18,654 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 82.0) internal successors, (3362), 41 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:18,654 INFO L186 Difference]: Start difference. First operand has 659 places, 3518 transitions, 98869 flow. Second operand 40 states and 2495 transitions. [2022-01-19 08:47:18,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 3985 transitions, 118073 flow [2022-01-19 08:47:29,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 3985 transitions, 114861 flow, removed 158 selfloop flow, removed 30 redundant places. [2022-01-19 08:47:29,474 INFO L242 Difference]: Finished difference. Result has 697 places, 3747 transitions, 112241 flow [2022-01-19 08:47:29,476 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=95895, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=112241, PETRI_PLACES=697, PETRI_TRANSITIONS=3747} [2022-01-19 08:47:29,477 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 625 predicate places. [2022-01-19 08:47:29,477 INFO L470 AbstractCegarLoop]: Abstraction has has 697 places, 3747 transitions, 112241 flow [2022-01-19 08:47:29,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.69565217391305) internal successors, (1373), 23 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:29,477 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:47:29,477 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:47:29,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-19 08:47:29,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:47:29,678 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:47:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:47:29,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1205573759, now seen corresponding path program 16 times [2022-01-19 08:47:29,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:47:29,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016972332] [2022-01-19 08:47:29,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:47:29,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:47:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:47:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:29,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:47:29,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016972332] [2022-01-19 08:47:29,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016972332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:47:29,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381069111] [2022-01-19 08:47:29,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:47:29,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:47:29,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:47:29,768 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:47:29,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-19 08:47:29,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:47:29,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:47:29,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:47:29,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:47:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:30,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:47:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:30,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381069111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:47:30,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:47:30,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 08:47:30,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738821472] [2022-01-19 08:47:30,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:47:30,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 08:47:30,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:47:30,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 08:47:30,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-01-19 08:47:30,168 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:47:30,169 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 3747 transitions, 112241 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:30,169 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:47:30,169 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:47:30,169 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:47:47,687 INFO L129 PetriNetUnfolder]: 4542/14054 cut-off events. [2022-01-19 08:47:47,687 INFO L130 PetriNetUnfolder]: For 1608428/1608428 co-relation queries the response was YES. [2022-01-19 08:47:48,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166589 conditions, 14054 events. 4542/14054 cut-off events. For 1608428/1608428 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 162332 event pairs, 275 based on Foata normal form. 7/14004 useless extension candidates. Maximal degree in co-relation 166375. Up to 3332 conditions per place. [2022-01-19 08:47:48,227 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2292 selfloop transitions, 1831 changer transitions 9/4177 dead transitions. [2022-01-19 08:47:48,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 4177 transitions, 132427 flow [2022-01-19 08:47:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-19 08:47:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-01-19 08:47:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2707 transitions. [2022-01-19 08:47:48,230 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7502771618625277 [2022-01-19 08:47:48,230 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2707 transitions. [2022-01-19 08:47:48,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2707 transitions. [2022-01-19 08:47:48,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:47:48,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2707 transitions. [2022-01-19 08:47:48,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 61.52272727272727) internal successors, (2707), 44 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:48,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 82.0) internal successors, (3690), 45 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:48,237 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 82.0) internal successors, (3690), 45 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:48,237 INFO L186 Difference]: Start difference. First operand has 697 places, 3747 transitions, 112241 flow. Second operand 44 states and 2707 transitions. [2022-01-19 08:47:48,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 740 places, 4177 transitions, 132427 flow [2022-01-19 08:48:01,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 732 places, 4177 transitions, 128120 flow, removed 299 selfloop flow, removed 8 redundant places. [2022-01-19 08:48:01,289 INFO L242 Difference]: Finished difference. Result has 747 places, 3962 transitions, 120799 flow [2022-01-19 08:48:01,292 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=108161, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1628, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1950, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=120799, PETRI_PLACES=747, PETRI_TRANSITIONS=3962} [2022-01-19 08:48:01,292 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 675 predicate places. [2022-01-19 08:48:01,293 INFO L470 AbstractCegarLoop]: Abstraction has has 747 places, 3962 transitions, 120799 flow [2022-01-19 08:48:01,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:01,293 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:48:01,293 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:48:01,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-19 08:48:01,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:48:01,493 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:48:01,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:48:01,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1266352041, now seen corresponding path program 17 times [2022-01-19 08:48:01,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:48:01,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233484627] [2022-01-19 08:48:01,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:48:01,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:48:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:48:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:01,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:48:01,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233484627] [2022-01-19 08:48:01,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233484627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:48:01,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719419007] [2022-01-19 08:48:01,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:48:01,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:48:01,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:48:01,596 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:48:01,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-19 08:48:01,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 08:48:01,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:48:01,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:48:01,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:48:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:01,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:48:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:01,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719419007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:48:01,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:48:01,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-19 08:48:01,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599310991] [2022-01-19 08:48:01,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:48:01,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 08:48:01,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:48:01,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 08:48:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-19 08:48:01,992 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:48:01,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 3962 transitions, 120799 flow. Second operand has 22 states, 22 states have (on average 59.18181818181818) internal successors, (1302), 22 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:01,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:48:01,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:48:01,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:48:20,953 INFO L129 PetriNetUnfolder]: 5228/15175 cut-off events. [2022-01-19 08:48:20,953 INFO L130 PetriNetUnfolder]: For 1796888/1796888 co-relation queries the response was YES. [2022-01-19 08:48:21,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185731 conditions, 15175 events. 5228/15175 cut-off events. For 1796888/1796888 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 171593 event pairs, 256 based on Foata normal form. 1/15138 useless extension candidates. Maximal degree in co-relation 185508. Up to 5468 conditions per place. [2022-01-19 08:48:21,459 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2284 selfloop transitions, 2489 changer transitions 5/4823 dead transitions. [2022-01-19 08:48:21,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 4823 transitions, 156790 flow [2022-01-19 08:48:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-19 08:48:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-01-19 08:48:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1406 transitions. [2022-01-19 08:48:21,460 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7454931071049841 [2022-01-19 08:48:21,460 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1406 transitions. [2022-01-19 08:48:21,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1406 transitions. [2022-01-19 08:48:21,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:48:21,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1406 transitions. [2022-01-19 08:48:21,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 61.130434782608695) internal successors, (1406), 23 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:21,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 82.0) internal successors, (1968), 24 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:21,464 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 82.0) internal successors, (1968), 24 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:21,464 INFO L186 Difference]: Start difference. First operand has 747 places, 3962 transitions, 120799 flow. Second operand 23 states and 1406 transitions. [2022-01-19 08:48:21,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 765 places, 4823 transitions, 156790 flow [2022-01-19 08:48:39,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 750 places, 4823 transitions, 156056 flow, removed 246 selfloop flow, removed 15 redundant places. [2022-01-19 08:48:39,196 INFO L242 Difference]: Finished difference. Result has 759 places, 4553 transitions, 150525 flow [2022-01-19 08:48:39,200 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=120119, PETRI_DIFFERENCE_MINUEND_PLACES=728, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1898, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=150525, PETRI_PLACES=759, PETRI_TRANSITIONS=4553} [2022-01-19 08:48:39,201 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 687 predicate places. [2022-01-19 08:48:39,201 INFO L470 AbstractCegarLoop]: Abstraction has has 759 places, 4553 transitions, 150525 flow [2022-01-19 08:48:39,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.18181818181818) internal successors, (1302), 22 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:39,201 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:48:39,201 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:48:39,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-19 08:48:39,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:48:39,427 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:48:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:48:39,428 INFO L85 PathProgramCache]: Analyzing trace with hash 943023525, now seen corresponding path program 18 times [2022-01-19 08:48:39,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:48:39,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689682634] [2022-01-19 08:48:39,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:48:39,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:48:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:48:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:39,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:48:39,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689682634] [2022-01-19 08:48:39,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689682634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:48:39,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230016327] [2022-01-19 08:48:39,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:48:39,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:48:39,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:48:39,520 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:48:39,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-19 08:48:39,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 08:48:39,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:48:39,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:48:39,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:48:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:39,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:48:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:39,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230016327] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:48:39,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:48:39,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-01-19 08:48:39,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089592438] [2022-01-19 08:48:39,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:48:39,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 08:48:39,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:48:39,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 08:48:39,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-01-19 08:48:39,961 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:48:39,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 4553 transitions, 150525 flow. Second operand has 22 states, 22 states have (on average 59.5) internal successors, (1309), 22 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:39,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:48:39,961 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:48:39,961 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:49:05,455 INFO L129 PetriNetUnfolder]: 5435/15830 cut-off events. [2022-01-19 08:49:05,455 INFO L130 PetriNetUnfolder]: For 1972473/1972473 co-relation queries the response was YES. [2022-01-19 08:49:05,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202665 conditions, 15830 events. 5435/15830 cut-off events. For 1972473/1972473 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 180492 event pairs, 262 based on Foata normal form. 7/15797 useless extension candidates. Maximal degree in co-relation 202437. Up to 7040 conditions per place. [2022-01-19 08:49:05,926 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 3566 selfloop transitions, 1210 changer transitions 2/4823 dead transitions. [2022-01-19 08:49:05,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 783 places, 4823 transitions, 168799 flow [2022-01-19 08:49:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-19 08:49:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-01-19 08:49:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1789 transitions. [2022-01-19 08:49:05,929 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7523128679562657 [2022-01-19 08:49:05,929 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1789 transitions. [2022-01-19 08:49:05,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1789 transitions. [2022-01-19 08:49:05,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:49:05,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1789 transitions. [2022-01-19 08:49:05,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 61.689655172413794) internal successors, (1789), 29 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:05,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 82.0) internal successors, (2460), 30 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:05,934 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 82.0) internal successors, (2460), 30 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:05,934 INFO L186 Difference]: Start difference. First operand has 759 places, 4553 transitions, 150525 flow. Second operand 29 states and 1789 transitions. [2022-01-19 08:49:05,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 783 places, 4823 transitions, 168799 flow [2022-01-19 08:49:24,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 767 places, 4823 transitions, 167657 flow, removed 38 selfloop flow, removed 16 redundant places. [2022-01-19 08:49:24,238 INFO L242 Difference]: Finished difference. Result has 775 places, 4711 transitions, 159250 flow [2022-01-19 08:49:24,241 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=149412, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1070, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=159250, PETRI_PLACES=775, PETRI_TRANSITIONS=4711} [2022-01-19 08:49:24,241 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 703 predicate places. [2022-01-19 08:49:24,242 INFO L470 AbstractCegarLoop]: Abstraction has has 775 places, 4711 transitions, 159250 flow [2022-01-19 08:49:24,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.5) internal successors, (1309), 22 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:24,242 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:49:24,242 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:49:24,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-19 08:49:24,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:49:24,443 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:49:24,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:49:24,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1222370885, now seen corresponding path program 19 times [2022-01-19 08:49:24,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:49:24,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335367545] [2022-01-19 08:49:24,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:49:24,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:49:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:49:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:49:24,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:49:24,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335367545] [2022-01-19 08:49:24,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335367545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:49:24,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131486228] [2022-01-19 08:49:24,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:49:24,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:49:24,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:49:24,516 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:49:24,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-19 08:49:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:49:24,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:49:24,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:49:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:49:24,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:49:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:49:24,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131486228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:49:24,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:49:24,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 08:49:24,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234036754] [2022-01-19 08:49:24,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:49:24,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 08:49:24,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:49:24,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 08:49:24,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-19 08:49:24,911 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:49:24,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 775 places, 4711 transitions, 159250 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:24,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:49:24,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:49:24,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:49:53,888 INFO L129 PetriNetUnfolder]: 5652/16530 cut-off events. [2022-01-19 08:49:53,889 INFO L130 PetriNetUnfolder]: For 2319433/2319433 co-relation queries the response was YES. [2022-01-19 08:49:54,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217619 conditions, 16530 events. 5652/16530 cut-off events. For 2319433/2319433 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 190265 event pairs, 345 based on Foata normal form. 8/16492 useless extension candidates. Maximal degree in co-relation 217386. Up to 7605 conditions per place. [2022-01-19 08:49:54,364 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 3789 selfloop transitions, 1132 changer transitions 8/4974 dead transitions. [2022-01-19 08:49:54,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 804 places, 4974 transitions, 177869 flow [2022-01-19 08:49:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-19 08:49:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-01-19 08:49:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1956 transitions. [2022-01-19 08:49:54,366 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7454268292682927 [2022-01-19 08:49:54,367 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1956 transitions. [2022-01-19 08:49:54,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1956 transitions. [2022-01-19 08:49:54,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:49:54,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1956 transitions. [2022-01-19 08:49:54,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 61.125) internal successors, (1956), 32 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:54,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 82.0) internal successors, (2706), 33 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:54,372 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 82.0) internal successors, (2706), 33 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:54,372 INFO L186 Difference]: Start difference. First operand has 775 places, 4711 transitions, 159250 flow. Second operand 32 states and 1956 transitions. [2022-01-19 08:49:54,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 804 places, 4974 transitions, 177869 flow [2022-01-19 08:50:17,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 4974 transitions, 175037 flow, removed 684 selfloop flow, removed 15 redundant places. [2022-01-19 08:50:17,963 INFO L242 Difference]: Finished difference. Result has 800 places, 4876 transitions, 166576 flow [2022-01-19 08:50:17,966 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=156451, PETRI_DIFFERENCE_MINUEND_PLACES=758, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=989, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=166576, PETRI_PLACES=800, PETRI_TRANSITIONS=4876} [2022-01-19 08:50:17,966 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 728 predicate places. [2022-01-19 08:50:17,966 INFO L470 AbstractCegarLoop]: Abstraction has has 800 places, 4876 transitions, 166576 flow [2022-01-19 08:50:17,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:50:17,966 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:50:17,967 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:50:17,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-19 08:50:18,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-19 08:50:18,167 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:50:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:50:18,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1692757929, now seen corresponding path program 20 times [2022-01-19 08:50:18,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:50:18,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117912426] [2022-01-19 08:50:18,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:50:18,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:50:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:50:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:50:18,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:50:18,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117912426] [2022-01-19 08:50:18,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117912426] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:50:18,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957045084] [2022-01-19 08:50:18,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:50:18,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:50:18,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:50:18,259 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:50:18,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-19 08:50:18,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:50:18,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:50:18,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:50:18,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:50:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:50:18,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:50:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:50:18,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957045084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:50:18,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:50:18,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 08:50:18,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338442393] [2022-01-19 08:50:18,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:50:18,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 08:50:18,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:50:18,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 08:50:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-19 08:50:18,664 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:50:18,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 4876 transitions, 166576 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:50:18,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:50:18,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:50:18,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:50:55,885 INFO L129 PetriNetUnfolder]: 6190/18300 cut-off events. [2022-01-19 08:50:55,885 INFO L130 PetriNetUnfolder]: For 2755234/2755234 co-relation queries the response was YES. [2022-01-19 08:50:56,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244819 conditions, 18300 events. 6190/18300 cut-off events. For 2755234/2755234 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 215030 event pairs, 287 based on Foata normal form. 15/18268 useless extension candidates. Maximal degree in co-relation 244577. Up to 7307 conditions per place. [2022-01-19 08:50:56,421 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 3830 selfloop transitions, 1629 changer transitions 17/5521 dead transitions. [2022-01-19 08:50:56,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 836 places, 5521 transitions, 199576 flow [2022-01-19 08:50:56,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 08:50:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 08:50:56,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2517 transitions. [2022-01-19 08:50:56,423 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7486615110053539 [2022-01-19 08:50:56,423 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2517 transitions. [2022-01-19 08:50:56,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2517 transitions. [2022-01-19 08:50:56,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:50:56,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2517 transitions. [2022-01-19 08:50:56,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.390243902439025) internal successors, (2517), 41 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:50:56,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:50:56,429 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:50:56,429 INFO L186 Difference]: Start difference. First operand has 800 places, 4876 transitions, 166576 flow. Second operand 41 states and 2517 transitions. [2022-01-19 08:50:56,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 836 places, 5521 transitions, 199576 flow [2022-01-19 08:51:32,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 5521 transitions, 196127 flow, removed 1543 selfloop flow, removed 15 redundant places. [2022-01-19 08:51:32,565 INFO L242 Difference]: Finished difference. Result has 841 places, 5267 transitions, 185093 flow [2022-01-19 08:51:32,568 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=164659, PETRI_DIFFERENCE_MINUEND_PLACES=781, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=185093, PETRI_PLACES=841, PETRI_TRANSITIONS=5267} [2022-01-19 08:51:32,568 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 769 predicate places. [2022-01-19 08:51:32,568 INFO L470 AbstractCegarLoop]: Abstraction has has 841 places, 5267 transitions, 185093 flow [2022-01-19 08:51:32,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:51:32,569 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:51:32,569 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:51:32,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-19 08:51:32,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-19 08:51:32,770 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:51:32,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:51:32,770 INFO L85 PathProgramCache]: Analyzing trace with hash -909859479, now seen corresponding path program 21 times [2022-01-19 08:51:32,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:51:32,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268653150] [2022-01-19 08:51:32,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:51:32,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:51:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:51:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:51:32,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:51:32,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268653150] [2022-01-19 08:51:32,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268653150] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:51:32,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427184278] [2022-01-19 08:51:32,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:51:32,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:51:32,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:51:32,860 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:51:32,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-19 08:51:32,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 08:51:32,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:51:32,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:51:32,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:51:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:51:33,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:51:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:51:33,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427184278] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:51:33,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:51:33,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 08:51:33,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819967877] [2022-01-19 08:51:33,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:51:33,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 08:51:33,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:51:33,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 08:51:33,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-01-19 08:51:33,300 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:51:33,301 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 841 places, 5267 transitions, 185093 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:51:33,301 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:51:33,301 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:51:33,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:52:08,744 INFO L129 PetriNetUnfolder]: 6178/18223 cut-off events. [2022-01-19 08:52:08,745 INFO L130 PetriNetUnfolder]: For 1695143/1695143 co-relation queries the response was YES. [2022-01-19 08:52:09,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229667 conditions, 18223 events. 6178/18223 cut-off events. For 1695143/1695143 co-relation queries the response was YES. Maximal size of possible extension queue 1186. Compared 213789 event pairs, 311 based on Foata normal form. 1/18179 useless extension candidates. Maximal degree in co-relation 229408. Up to 8820 conditions per place. [2022-01-19 08:52:09,198 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 4247 selfloop transitions, 997 changer transitions 4/5293 dead transitions. [2022-01-19 08:52:09,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 855 places, 5293 transitions, 195991 flow [2022-01-19 08:52:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 08:52:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 08:52:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1097 transitions. [2022-01-19 08:52:09,199 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7432249322493225 [2022-01-19 08:52:09,199 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1097 transitions. [2022-01-19 08:52:09,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1097 transitions. [2022-01-19 08:52:09,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:52:09,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1097 transitions. [2022-01-19 08:52:09,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:52:09,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:52:09,201 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:52:09,201 INFO L186 Difference]: Start difference. First operand has 841 places, 5267 transitions, 185093 flow. Second operand 18 states and 1097 transitions. [2022-01-19 08:52:09,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 855 places, 5293 transitions, 195991 flow [2022-01-19 08:52:35,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 5293 transitions, 193291 flow, removed 1055 selfloop flow, removed 22 redundant places. [2022-01-19 08:52:35,534 INFO L242 Difference]: Finished difference. Result has 836 places, 5266 transitions, 184391 flow [2022-01-19 08:52:35,538 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=182399, PETRI_DIFFERENCE_MINUEND_PLACES=816, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=997, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=184391, PETRI_PLACES=836, PETRI_TRANSITIONS=5266} [2022-01-19 08:52:35,538 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 764 predicate places. [2022-01-19 08:52:35,539 INFO L470 AbstractCegarLoop]: Abstraction has has 836 places, 5266 transitions, 184391 flow [2022-01-19 08:52:35,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:52:35,539 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:52:35,539 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:52:35,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-19 08:52:35,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:52:35,759 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:52:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:52:35,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1966582809, now seen corresponding path program 22 times [2022-01-19 08:52:35,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:52:35,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502484186] [2022-01-19 08:52:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:52:35,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:52:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:52:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:52:35,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:52:35,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502484186] [2022-01-19 08:52:35,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502484186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:52:35,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906625112] [2022-01-19 08:52:35,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:52:35,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:52:35,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:52:35,845 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:52:35,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-19 08:52:35,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:52:35,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:52:35,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:52:35,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:52:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:52:36,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:52:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:52:36,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906625112] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:52:36,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:52:36,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-01-19 08:52:36,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987710972] [2022-01-19 08:52:36,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:52:36,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 08:52:36,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:52:36,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 08:52:36,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-19 08:52:36,240 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:52:36,241 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 836 places, 5266 transitions, 184391 flow. Second operand has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:52:36,241 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:52:36,241 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:52:36,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:53:07,650 INFO L129 PetriNetUnfolder]: 6337/18556 cut-off events. [2022-01-19 08:53:07,650 INFO L130 PetriNetUnfolder]: For 1522455/1522455 co-relation queries the response was YES. [2022-01-19 08:53:07,997 INFO L84 FinitePrefix]: Finished finitePrefix Result has 230565 conditions, 18556 events. 6337/18556 cut-off events. For 1522455/1522455 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 217696 event pairs, 282 based on Foata normal form. 71/18600 useless extension candidates. Maximal degree in co-relation 230309. Up to 7117 conditions per place. [2022-01-19 08:53:08,121 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1843 selfloop transitions, 3694 changer transitions 7/5589 dead transitions. [2022-01-19 08:53:08,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 5589 transitions, 204964 flow [2022-01-19 08:53:08,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-19 08:53:08,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-01-19 08:53:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2093 transitions. [2022-01-19 08:53:08,123 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7507173601147776 [2022-01-19 08:53:08,123 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2093 transitions. [2022-01-19 08:53:08,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2093 transitions. [2022-01-19 08:53:08,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:53:08,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2093 transitions. [2022-01-19 08:53:08,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 61.55882352941177) internal successors, (2093), 34 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:53:08,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 82.0) internal successors, (2870), 35 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:53:08,126 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 82.0) internal successors, (2870), 35 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:53:08,126 INFO L186 Difference]: Start difference. First operand has 836 places, 5266 transitions, 184391 flow. Second operand 34 states and 2093 transitions. [2022-01-19 08:53:08,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 5589 transitions, 204964 flow [2022-01-19 08:53:32,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 5589 transitions, 204437 flow, removed 10 selfloop flow, removed 11 redundant places. [2022-01-19 08:53:32,611 INFO L242 Difference]: Finished difference. Result has 863 places, 5433 transitions, 204363 flow [2022-01-19 08:53:32,616 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=183407, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3518, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=204363, PETRI_PLACES=863, PETRI_TRANSITIONS=5433} [2022-01-19 08:53:32,616 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 791 predicate places. [2022-01-19 08:53:32,616 INFO L470 AbstractCegarLoop]: Abstraction has has 863 places, 5433 transitions, 204363 flow [2022-01-19 08:53:32,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:53:32,617 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:53:32,617 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:53:32,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-19 08:53:32,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:53:32,831 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:53:32,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:53:32,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1169067223, now seen corresponding path program 23 times [2022-01-19 08:53:32,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:53:32,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561024806] [2022-01-19 08:53:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:53:32,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:53:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:53:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:53:32,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:53:32,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561024806] [2022-01-19 08:53:32,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561024806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:53:32,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308325420] [2022-01-19 08:53:32,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:53:32,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:53:32,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:53:32,901 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:53:32,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-19 08:53:32,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 08:53:32,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:53:32,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:53:32,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:53:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:53:33,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:53:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:53:33,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308325420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:53:33,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:53:33,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-01-19 08:53:33,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21749720] [2022-01-19 08:53:33,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:53:33,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 08:53:33,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:53:33,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 08:53:33,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-19 08:53:33,281 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:53:33,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 863 places, 5433 transitions, 204363 flow. Second operand has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:53:33,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:53:33,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:53:33,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:54:11,400 INFO L129 PetriNetUnfolder]: 6683/19593 cut-off events. [2022-01-19 08:54:11,400 INFO L130 PetriNetUnfolder]: For 1850363/1850363 co-relation queries the response was YES. [2022-01-19 08:54:11,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 259876 conditions, 19593 events. 6683/19593 cut-off events. For 1850363/1850363 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 231483 event pairs, 246 based on Foata normal form. 86/19657 useless extension candidates. Maximal degree in co-relation 259613. Up to 5832 conditions per place. [2022-01-19 08:54:11,945 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1834 selfloop transitions, 4002 changer transitions 7/5888 dead transitions. [2022-01-19 08:54:11,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 894 places, 5888 transitions, 231487 flow [2022-01-19 08:54:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-19 08:54:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-01-19 08:54:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2222 transitions. [2022-01-19 08:54:11,947 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.752710027100271 [2022-01-19 08:54:11,947 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2222 transitions. [2022-01-19 08:54:11,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2222 transitions. [2022-01-19 08:54:11,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:54:11,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2222 transitions. [2022-01-19 08:54:11,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 61.72222222222222) internal successors, (2222), 36 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:54:11,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 82.0) internal successors, (3034), 37 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:54:11,951 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 82.0) internal successors, (3034), 37 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:54:11,951 INFO L186 Difference]: Start difference. First operand has 863 places, 5433 transitions, 204363 flow. Second operand 36 states and 2222 transitions. [2022-01-19 08:54:11,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 894 places, 5888 transitions, 231487 flow [2022-01-19 08:54:42,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 873 places, 5888 transitions, 230003 flow, removed 421 selfloop flow, removed 21 redundant places. [2022-01-19 08:54:43,039 INFO L242 Difference]: Finished difference. Result has 886 places, 5703 transitions, 229792 flow [2022-01-19 08:54:43,044 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=202582, PETRI_DIFFERENCE_MINUEND_PLACES=838, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3734, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=229792, PETRI_PLACES=886, PETRI_TRANSITIONS=5703} [2022-01-19 08:54:43,044 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 814 predicate places. [2022-01-19 08:54:43,044 INFO L470 AbstractCegarLoop]: Abstraction has has 886 places, 5703 transitions, 229792 flow [2022-01-19 08:54:43,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:54:43,045 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:54:43,045 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:54:43,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-19 08:54:43,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-19 08:54:43,259 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:54:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:54:43,260 INFO L85 PathProgramCache]: Analyzing trace with hash -691720079, now seen corresponding path program 24 times [2022-01-19 08:54:43,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:54:43,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017880955] [2022-01-19 08:54:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:54:43,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:54:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:54:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:54:43,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:54:43,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017880955] [2022-01-19 08:54:43,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017880955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:54:43,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909256393] [2022-01-19 08:54:43,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:54:43,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:54:43,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:54:43,343 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:54:43,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-19 08:54:43,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 08:54:43,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:54:43,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 08:54:43,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:54:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:54:43,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:54:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:54:44,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909256393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:54:44,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:54:44,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2022-01-19 08:54:44,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75046468] [2022-01-19 08:54:44,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:54:44,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 08:54:44,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:54:44,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 08:54:44,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-19 08:54:44,097 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-01-19 08:54:44,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 886 places, 5703 transitions, 229792 flow. Second operand has 11 states, 11 states have (on average 62.63636363636363) internal successors, (689), 11 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:54:44,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:54:44,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-01-19 08:54:44,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:55:27,505 INFO L129 PetriNetUnfolder]: 10360/32319 cut-off events. [2022-01-19 08:55:27,505 INFO L130 PetriNetUnfolder]: For 3247787/3248546 co-relation queries the response was YES. [2022-01-19 08:55:28,371 INFO L84 FinitePrefix]: Finished finitePrefix Result has 429620 conditions, 32319 events. 10360/32319 cut-off events. For 3247787/3248546 co-relation queries the response was YES. Maximal size of possible extension queue 1619. Compared 417467 event pairs, 295 based on Foata normal form. 214/32418 useless extension candidates. Maximal degree in co-relation 429349. Up to 6901 conditions per place. [2022-01-19 08:55:28,667 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 2640 selfloop transitions, 2476 changer transitions 315/8121 dead transitions. [2022-01-19 08:55:28,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 8121 transitions, 355605 flow [2022-01-19 08:55:28,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 08:55:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 08:55:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 462 transitions. [2022-01-19 08:55:28,668 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-01-19 08:55:28,668 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 462 transitions. [2022-01-19 08:55:28,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 462 transitions. [2022-01-19 08:55:28,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:55:28,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 462 transitions. [2022-01-19 08:55:28,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:28,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:28,669 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:28,669 INFO L186 Difference]: Start difference. First operand has 886 places, 5703 transitions, 229792 flow. Second operand 7 states and 462 transitions. [2022-01-19 08:55:28,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 8121 transitions, 355605 flow [2022-01-19 08:56:40,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 876 places, 8121 transitions, 353621 flow, removed 572 selfloop flow, removed 16 redundant places. [2022-01-19 08:56:41,182 INFO L242 Difference]: Finished difference. Result has 881 places, 7617 transitions, 332602 flow [2022-01-19 08:56:41,191 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=228353, PETRI_DIFFERENCE_MINUEND_PLACES=870, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=704, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=332602, PETRI_PLACES=881, PETRI_TRANSITIONS=7617} [2022-01-19 08:56:41,195 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 809 predicate places. [2022-01-19 08:56:41,195 INFO L470 AbstractCegarLoop]: Abstraction has has 881 places, 7617 transitions, 332602 flow [2022-01-19 08:56:41,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 62.63636363636363) internal successors, (689), 11 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:41,196 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:56:41,196 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:56:41,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-19 08:56:41,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 08:56:41,415 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:56:41,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:56:41,416 INFO L85 PathProgramCache]: Analyzing trace with hash 221206373, now seen corresponding path program 25 times [2022-01-19 08:56:41,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:56:41,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789882546] [2022-01-19 08:56:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:56:41,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:56:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:56:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:56:41,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:56:41,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789882546] [2022-01-19 08:56:41,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789882546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:56:41,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152781059] [2022-01-19 08:56:41,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:56:41,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:56:41,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:56:41,517 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:56:41,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-19 08:56:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:56:41,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:56:41,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:56:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:56:41,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:56:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:56:42,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152781059] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:56:42,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:56:42,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-19 08:56:42,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534237787] [2022-01-19 08:56:42,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:56:42,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-19 08:56:42,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:56:42,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-19 08:56:42,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-19 08:56:42,149 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 08:56:42,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 881 places, 7617 transitions, 332602 flow. Second operand has 25 states, 25 states have (on average 59.2) internal successors, (1480), 25 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:42,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:56:42,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 08:56:42,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:58:27,131 INFO L129 PetriNetUnfolder]: 11508/34167 cut-off events. [2022-01-19 08:58:27,131 INFO L130 PetriNetUnfolder]: For 3888132/3888132 co-relation queries the response was YES. [2022-01-19 08:58:28,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 487026 conditions, 34167 events. 11508/34167 cut-off events. For 3888132/3888132 co-relation queries the response was YES. Maximal size of possible extension queue 1906. Compared 438426 event pairs, 231 based on Foata normal form. 250/34357 useless extension candidates. Maximal degree in co-relation 486750. Up to 7166 conditions per place. [2022-01-19 08:58:28,452 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 1181 selfloop transitions, 8387 changer transitions 401/10014 dead transitions. [2022-01-19 08:58:28,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 946 places, 10014 transitions, 445885 flow [2022-01-19 08:58:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-19 08:58:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-01-19 08:58:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4173 transitions. [2022-01-19 08:58:28,455 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7483859397417504 [2022-01-19 08:58:28,455 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4173 transitions. [2022-01-19 08:58:28,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4173 transitions. [2022-01-19 08:58:28,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:58:28,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4173 transitions. [2022-01-19 08:58:28,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 61.36764705882353) internal successors, (4173), 68 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:58:28,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 82.0) internal successors, (5658), 69 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:58:28,463 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 82.0) internal successors, (5658), 69 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:58:28,463 INFO L186 Difference]: Start difference. First operand has 881 places, 7617 transitions, 332602 flow. Second operand 68 states and 4173 transitions. [2022-01-19 08:58:28,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 946 places, 10014 transitions, 445885 flow Received shutdown request... [2022-01-19 08:59:01,377 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 08:59:01,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-19 08:59:01,410 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 08:59:01,410 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 08:59:01,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-19 08:59:01,579 WARN L594 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-01-19 08:59:01,581 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 08:59:01,581 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 08:59:01,584 INFO L732 BasicCegarLoop]: Path program histogram: [25, 2, 1, 1] [2022-01-19 08:59:01,585 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 08:59:01,586 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 08:59:01,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 08:59:01 BasicIcfg [2022-01-19 08:59:01,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 08:59:01,588 INFO L158 Benchmark]: Toolchain (without parser) took 809891.94ms. Allocated memory was 358.6MB in the beginning and 9.0GB in the end (delta: 8.7GB). Free memory was 304.9MB in the beginning and 6.8GB in the end (delta: -6.5GB). Peak memory consumption was 6.0GB. Max. memory is 16.0GB. [2022-01-19 08:59:01,588 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 358.6MB. Free memory is still 321.3MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 08:59:01,588 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.72ms. Allocated memory is still 358.6MB. Free memory was 304.7MB in the beginning and 330.5MB in the end (delta: -25.8MB). Peak memory consumption was 13.2MB. Max. memory is 16.0GB. [2022-01-19 08:59:01,589 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.45ms. Allocated memory is still 358.6MB. Free memory was 330.5MB in the beginning and 329.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 08:59:01,589 INFO L158 Benchmark]: Boogie Preprocessor took 18.41ms. Allocated memory is still 358.6MB. Free memory was 329.0MB in the beginning and 327.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 08:59:01,589 INFO L158 Benchmark]: RCFGBuilder took 430.39ms. Allocated memory is still 358.6MB. Free memory was 327.7MB in the beginning and 315.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-19 08:59:01,589 INFO L158 Benchmark]: TraceAbstraction took 809203.53ms. Allocated memory was 358.6MB in the beginning and 9.0GB in the end (delta: 8.7GB). Free memory was 314.7MB in the beginning and 6.8GB in the end (delta: -6.5GB). Peak memory consumption was 6.0GB. Max. memory is 16.0GB. [2022-01-19 08:59:01,590 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 358.6MB. Free memory is still 321.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 209.72ms. Allocated memory is still 358.6MB. Free memory was 304.7MB in the beginning and 330.5MB in the end (delta: -25.8MB). Peak memory consumption was 13.2MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 25.45ms. Allocated memory is still 358.6MB. Free memory was 330.5MB in the beginning and 329.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.41ms. Allocated memory is still 358.6MB. Free memory was 329.0MB in the beginning and 327.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 430.39ms. Allocated memory is still 358.6MB. Free memory was 327.7MB in the beginning and 315.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 809203.53ms. Allocated memory was 358.6MB in the beginning and 9.0GB in the end (delta: 8.7GB). Free memory was 314.7MB in the beginning and 6.8GB in the end (delta: -6.5GB). Peak memory consumption was 6.0GB. 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: 77]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 94 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 809.1s, OverallIterations: 29, TraceHistogramMax: 2, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 787.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4020 SdHoareTripleChecker+Valid, 6.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4020 mSDsluCounter, 2982 SdHoareTripleChecker+Invalid, 5.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4451 mSDsCounter, 1759 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14501 IncrementalHoareTripleChecker+Invalid, 16260 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1759 mSolverCounterUnsat, 524 mSDtfsCounter, 14501 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4550 GetRequests, 3249 SyntacticMatches, 33 SemanticMatches, 1268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22191 ImplicationChecksByTransitivity, 13.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=332602occurred in iteration=28, InterpolantAutomatonStates: 925, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 13.4s InterpolantComputationTime, 3793 NumberOfCodeBlocks, 3768 NumberOfCodeBlocksAsserted, 88 NumberOfCheckSat, 5457 ConstructedInterpolants, 0 QuantifiedInterpolants, 16798 SizeOfPredicates, 233 NumberOfNonLiveVariables, 3954 ConjunctsInSsa, 233 ConjunctsInUnsatCore, 80 InterpolantComputations, 4 PerfectInterpolantSequences, 348/585 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