/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/bench-exp1x3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 06:41:36,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 06:41:36,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 06:41:36,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 06:41:36,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 06:41:36,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 06:41:36,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 06:41:36,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 06:41:36,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 06:41:36,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 06:41:36,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 06:41:36,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 06:41:36,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 06:41:36,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 06:41:36,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 06:41:37,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 06:41:37,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 06:41:37,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 06:41:37,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 06:41:37,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 06:41:37,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 06:41:37,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 06:41:37,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 06:41:37,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 06:41:37,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 06:41:37,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 06:41:37,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 06:41:37,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 06:41:37,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 06:41:37,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 06:41:37,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 06:41:37,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 06:41:37,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 06:41:37,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 06:41:37,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 06:41:37,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 06:41:37,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 06:41:37,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 06:41:37,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 06:41:37,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 06:41:37,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 06:41:37,023 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 06:41:37,055 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 06:41:37,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 06:41:37,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 06:41:37,057 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 06:41:37,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 06:41:37,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 06:41:37,058 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 06:41:37,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 06:41:37,058 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 06:41:37,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 06:41:37,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 06:41:37,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 06:41:37,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 06:41:37,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 06:41:37,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 06:41:37,059 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 06:41:37,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 06:41:37,060 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 06:41:37,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 06:41:37,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 06:41:37,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 06:41:37,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 06:41:37,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 06:41:37,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 06:41:37,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 06:41:37,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 06:41:37,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 06:41:37,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 06:41:37,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 06:41:37,062 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 06:41:37,062 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 06:41:37,062 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 06:41:37,062 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 06:41:37,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 06:41:37,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 06:41:37,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 06:41:37,263 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 06:41:37,267 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 06:41:37,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c [2022-01-19 06:41:37,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5b71bfb/d5ba859e4fdf431496d213f62fb6493e/FLAGd5a9a52c2 [2022-01-19 06:41:37,683 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 06:41:37,686 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c [2022-01-19 06:41:37,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5b71bfb/d5ba859e4fdf431496d213f62fb6493e/FLAGd5a9a52c2 [2022-01-19 06:41:37,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5b71bfb/d5ba859e4fdf431496d213f62fb6493e [2022-01-19 06:41:37,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 06:41:37,708 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 06:41:37,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 06:41:37,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 06:41:37,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 06:41:37,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 06:41:37" (1/1) ... [2022-01-19 06:41:37,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67da1426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 06:41:37, skipping insertion in model container [2022-01-19 06:41:37,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 06:41:37" (1/1) ... [2022-01-19 06:41:37,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 06:41:37,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 06:41:37,875 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/bench-exp1x3.wvr.c[1849,1862] [2022-01-19 06:41:37,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 06:41:37,883 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 06:41:37,896 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/bench-exp1x3.wvr.c[1849,1862] [2022-01-19 06:41:37,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 06:41:37,906 INFO L208 MainTranslator]: Completed translation [2022-01-19 06:41:37,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 06:41:37 WrapperNode [2022-01-19 06:41:37,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 06:41:37,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 06:41:37,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 06:41:37,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 06:41:37,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 06:41:37" (1/1) ... [2022-01-19 06:41:37,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 06:41:37" (1/1) ... [2022-01-19 06:41:37,935 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2022-01-19 06:41:37,935 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 06:41:37,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 06:41:37,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 06:41:37,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 06:41:37,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 06:41:37" (1/1) ... [2022-01-19 06:41:37,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 06:41:37" (1/1) ... [2022-01-19 06:41:37,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 06:41:37" (1/1) ... [2022-01-19 06:41:37,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 06:41:37" (1/1) ... [2022-01-19 06:41:37,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 06:41:37" (1/1) ... [2022-01-19 06:41:37,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 06:41:37" (1/1) ... [2022-01-19 06:41:37,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 06:41:37" (1/1) ... [2022-01-19 06:41:37,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 06:41:37,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 06:41:37,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 06:41:37,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 06:41:37,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 06:41:37" (1/1) ... [2022-01-19 06:41:37,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 06:41:37,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 06:41:37,982 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 06:41:38,005 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 06:41:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 06:41:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 06:41:38,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 06:41:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 06:41:38,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 06:41:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 06:41:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 06:41:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 06:41:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 06:41:38,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 06:41:38,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 06:41:38,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 06:41:38,023 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 06:41:38,105 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 06:41:38,107 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 06:41:38,219 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 06:41:38,225 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 06:41:38,226 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 06:41:38,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 06:41:38 BoogieIcfgContainer [2022-01-19 06:41:38,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 06:41:38,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 06:41:38,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 06:41:38,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 06:41:38,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 06:41:37" (1/3) ... [2022-01-19 06:41:38,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f285164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 06:41:38, skipping insertion in model container [2022-01-19 06:41:38,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 06:41:37" (2/3) ... [2022-01-19 06:41:38,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f285164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 06:41:38, skipping insertion in model container [2022-01-19 06:41:38,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 06:41:38" (3/3) ... [2022-01-19 06:41:38,233 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp1x3.wvr.c [2022-01-19 06:41:38,237 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 06:41:38,238 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 06:41:38,238 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 06:41:38,295 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 06:41:38,296 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 06:41:38,296 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 06:41:38,296 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 06:41:38,298 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 06:41:38,298 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 06:41:38,298 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 06:41:38,298 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 06:41:38,301 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 06:41:38,302 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 06:41:38,304 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 06:41:38,304 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 06:41:38,325 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 06:41:38,376 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 06:41:38,384 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 06:41:38,384 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 06:41:38,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2022-01-19 06:41:38,428 INFO L129 PetriNetUnfolder]: 6/79 cut-off events. [2022-01-19 06:41:38,429 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 06:41:38,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 26 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-01-19 06:41:38,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2022-01-19 06:41:38,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 70 transitions, 152 flow [2022-01-19 06:41:38,454 INFO L129 PetriNetUnfolder]: 6/69 cut-off events. [2022-01-19 06:41:38,454 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 06:41:38,454 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 06:41:38,455 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 06:41:38,455 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 06:41:38,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 06:41:38,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1132836851, now seen corresponding path program 1 times [2022-01-19 06:41:38,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 06:41:38,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630988243] [2022-01-19 06:41:38,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 06:41:38,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 06:41:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 06:41:38,620 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 06:41:38,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 06:41:38,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630988243] [2022-01-19 06:41:38,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630988243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 06:41:38,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 06:41:38,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 06:41:38,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499625964] [2022-01-19 06:41:38,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 06:41:38,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 06:41:38,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 06:41:38,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 06:41:38,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 06:41:38,655 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 81 [2022-01-19 06:41:38,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 152 flow. Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:38,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 06:41:38,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 81 [2022-01-19 06:41:38,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 06:41:38,690 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2022-01-19 06:41:38,690 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 06:41:38,691 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 66 events. 2/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 6/68 useless extension candidates. Maximal degree in co-relation 47. Up to 5 conditions per place. [2022-01-19 06:41:38,692 INFO L132 encePairwiseOnDemand]: 77/81 looper letters, 4 selfloop transitions, 0 changer transitions 2/66 dead transitions. [2022-01-19 06:41:38,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 152 flow [2022-01-19 06:41:38,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 06:41:38,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 06:41:38,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-01-19 06:41:38,712 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9382716049382716 [2022-01-19 06:41:38,713 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-01-19 06:41:38,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-01-19 06:41:38,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 06:41:38,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-01-19 06:41:38,723 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 06:41:38,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:38,727 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:38,728 INFO L186 Difference]: Start difference. First operand has 71 places, 70 transitions, 152 flow. Second operand 2 states and 152 transitions. [2022-01-19 06:41:38,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 152 flow [2022-01-19 06:41:38,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 06:41:38,735 INFO L242 Difference]: Finished difference. Result has 68 places, 64 transitions, 132 flow [2022-01-19 06:41:38,737 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=132, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2022-01-19 06:41:38,740 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-01-19 06:41:38,741 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 132 flow [2022-01-19 06:41:38,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:38,741 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 06:41:38,741 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 06:41:38,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 06:41:38,742 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 06:41:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 06:41:38,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2129909204, now seen corresponding path program 1 times [2022-01-19 06:41:38,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 06:41:38,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699221028] [2022-01-19 06:41:38,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 06:41:38,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 06:41:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 06:41:39,023 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 06:41:39,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 06:41:39,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699221028] [2022-01-19 06:41:39,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699221028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 06:41:39,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 06:41:39,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-19 06:41:39,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102354379] [2022-01-19 06:41:39,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 06:41:39,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 06:41:39,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 06:41:39,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 06:41:39,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-19 06:41:39,032 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 81 [2022-01-19 06:41:39,033 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 132 flow. Second operand has 7 states, 7 states have (on average 54.57142857142857) internal successors, (382), 7 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:39,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 06:41:39,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 81 [2022-01-19 06:41:39,033 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 06:41:39,251 INFO L129 PetriNetUnfolder]: 31/147 cut-off events. [2022-01-19 06:41:39,251 INFO L130 PetriNetUnfolder]: For 8/20 co-relation queries the response was YES. [2022-01-19 06:41:39,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 147 events. 31/147 cut-off events. For 8/20 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 365 event pairs, 16 based on Foata normal form. 1/124 useless extension candidates. Maximal degree in co-relation 232. Up to 48 conditions per place. [2022-01-19 06:41:39,253 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 25 selfloop transitions, 5 changer transitions 4/76 dead transitions. [2022-01-19 06:41:39,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 227 flow [2022-01-19 06:41:39,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 06:41:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 06:41:39,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 399 transitions. [2022-01-19 06:41:39,259 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2022-01-19 06:41:39,259 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 399 transitions. [2022-01-19 06:41:39,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 399 transitions. [2022-01-19 06:41:39,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 06:41:39,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 399 transitions. [2022-01-19 06:41:39,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 57.0) internal successors, (399), 7 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:39,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:39,265 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:39,265 INFO L186 Difference]: Start difference. First operand has 68 places, 64 transitions, 132 flow. Second operand 7 states and 399 transitions. [2022-01-19 06:41:39,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 227 flow [2022-01-19 06:41:39,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 76 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 06:41:39,267 INFO L242 Difference]: Finished difference. Result has 75 places, 66 transitions, 159 flow [2022-01-19 06:41:39,268 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=159, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2022-01-19 06:41:39,268 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-01-19 06:41:39,269 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 159 flow [2022-01-19 06:41:39,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.57142857142857) internal successors, (382), 7 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:39,269 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 06:41:39,269 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 06:41:39,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 06:41:39,270 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 06:41:39,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 06:41:39,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1998264494, now seen corresponding path program 1 times [2022-01-19 06:41:39,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 06:41:39,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571297777] [2022-01-19 06:41:39,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 06:41:39,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 06:41:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 06:41:39,410 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 06:41:39,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 06:41:39,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571297777] [2022-01-19 06:41:39,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571297777] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 06:41:39,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114638044] [2022-01-19 06:41:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 06:41:39,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 06:41:39,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 06:41:39,413 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 06:41:39,414 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 06:41:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 06:41:39,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-19 06:41:39,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 06:41:39,913 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 06:41:39,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 06:41:40,148 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 06:41:40,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114638044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 06:41:40,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 06:41:40,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-19 06:41:40,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330730546] [2022-01-19 06:41:40,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 06:41:40,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-19 06:41:40,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 06:41:40,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-19 06:41:40,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-19 06:41:40,153 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-01-19 06:41:40,154 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 159 flow. Second operand has 10 states, 10 states have (on average 53.3) internal successors, (533), 10 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:40,154 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 06:41:40,154 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-01-19 06:41:40,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 06:41:40,477 INFO L129 PetriNetUnfolder]: 38/186 cut-off events. [2022-01-19 06:41:40,478 INFO L130 PetriNetUnfolder]: For 26/34 co-relation queries the response was YES. [2022-01-19 06:41:40,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 186 events. 38/186 cut-off events. For 26/34 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 595 event pairs, 3 based on Foata normal form. 2/168 useless extension candidates. Maximal degree in co-relation 338. Up to 36 conditions per place. [2022-01-19 06:41:40,481 INFO L132 encePairwiseOnDemand]: 70/81 looper letters, 40 selfloop transitions, 16 changer transitions 1/97 dead transitions. [2022-01-19 06:41:40,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 97 transitions, 361 flow [2022-01-19 06:41:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-19 06:41:40,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-01-19 06:41:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 611 transitions. [2022-01-19 06:41:40,487 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6857463524130191 [2022-01-19 06:41:40,487 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 611 transitions. [2022-01-19 06:41:40,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 611 transitions. [2022-01-19 06:41:40,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 06:41:40,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 611 transitions. [2022-01-19 06:41:40,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.54545454545455) internal successors, (611), 11 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:40,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 81.0) internal successors, (972), 12 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:40,496 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 81.0) internal successors, (972), 12 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:40,496 INFO L186 Difference]: Start difference. First operand has 75 places, 66 transitions, 159 flow. Second operand 11 states and 611 transitions. [2022-01-19 06:41:40,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 97 transitions, 361 flow [2022-01-19 06:41:40,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 346 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-01-19 06:41:40,503 INFO L242 Difference]: Finished difference. Result has 84 places, 74 transitions, 244 flow [2022-01-19 06:41:40,503 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=244, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2022-01-19 06:41:40,508 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 13 predicate places. [2022-01-19 06:41:40,508 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 244 flow [2022-01-19 06:41:40,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.3) internal successors, (533), 10 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:40,509 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 06:41:40,509 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 06:41:40,538 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 06:41:40,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 06:41:40,724 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 06:41:40,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 06:41:40,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2140770938, now seen corresponding path program 2 times [2022-01-19 06:41:40,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 06:41:40,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185701361] [2022-01-19 06:41:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 06:41:40,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 06:41:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 06:41:40,897 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 06:41:40,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 06:41:40,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185701361] [2022-01-19 06:41:40,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185701361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 06:41:40,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 06:41:40,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 06:41:40,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887780741] [2022-01-19 06:41:40,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 06:41:40,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 06:41:40,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 06:41:40,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 06:41:40,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-19 06:41:40,906 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-01-19 06:41:40,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 244 flow. Second operand has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:40,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 06:41:40,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-01-19 06:41:40,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 06:41:41,021 INFO L129 PetriNetUnfolder]: 34/161 cut-off events. [2022-01-19 06:41:41,022 INFO L130 PetriNetUnfolder]: For 110/114 co-relation queries the response was YES. [2022-01-19 06:41:41,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 161 events. 34/161 cut-off events. For 110/114 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 466 event pairs, 10 based on Foata normal form. 3/157 useless extension candidates. Maximal degree in co-relation 388. Up to 66 conditions per place. [2022-01-19 06:41:41,030 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 32 selfloop transitions, 5 changer transitions 7/84 dead transitions. [2022-01-19 06:41:41,030 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 386 flow [2022-01-19 06:41:41,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 06:41:41,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 06:41:41,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 338 transitions. [2022-01-19 06:41:41,032 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6954732510288066 [2022-01-19 06:41:41,032 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 338 transitions. [2022-01-19 06:41:41,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 338 transitions. [2022-01-19 06:41:41,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 06:41:41,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 338 transitions. [2022-01-19 06:41:41,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:41,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:41,035 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:41,035 INFO L186 Difference]: Start difference. First operand has 84 places, 74 transitions, 244 flow. Second operand 6 states and 338 transitions. [2022-01-19 06:41:41,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 386 flow [2022-01-19 06:41:41,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 373 flow, removed 2 selfloop flow, removed 4 redundant places. [2022-01-19 06:41:41,043 INFO L242 Difference]: Finished difference. Result has 87 places, 74 transitions, 252 flow [2022-01-19 06:41:41,044 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2022-01-19 06:41:41,045 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2022-01-19 06:41:41,045 INFO L470 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 252 flow [2022-01-19 06:41:41,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:41,045 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 06:41:41,046 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 06:41:41,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 06:41:41,046 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 06:41:41,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 06:41:41,047 INFO L85 PathProgramCache]: Analyzing trace with hash 265794878, now seen corresponding path program 1 times [2022-01-19 06:41:41,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 06:41:41,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619273799] [2022-01-19 06:41:41,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 06:41:41,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 06:41:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 06:41:41,158 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 06:41:41,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 06:41:41,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619273799] [2022-01-19 06:41:41,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619273799] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 06:41:41,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 06:41:41,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 06:41:41,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879950489] [2022-01-19 06:41:41,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 06:41:41,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 06:41:41,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 06:41:41,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 06:41:41,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-19 06:41:41,161 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-01-19 06:41:41,162 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 252 flow. Second operand has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:41,162 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 06:41:41,162 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-01-19 06:41:41,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 06:41:41,272 INFO L129 PetriNetUnfolder]: 34/142 cut-off events. [2022-01-19 06:41:41,273 INFO L130 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2022-01-19 06:41:41,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 142 events. 34/142 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 317 event pairs, 3 based on Foata normal form. 3/143 useless extension candidates. Maximal degree in co-relation 374. Up to 52 conditions per place. [2022-01-19 06:41:41,274 INFO L132 encePairwiseOnDemand]: 70/81 looper letters, 33 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2022-01-19 06:41:41,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 86 transitions, 409 flow [2022-01-19 06:41:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 06:41:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 06:41:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 389 transitions. [2022-01-19 06:41:41,276 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6860670194003528 [2022-01-19 06:41:41,276 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 389 transitions. [2022-01-19 06:41:41,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 389 transitions. [2022-01-19 06:41:41,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 06:41:41,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 389 transitions. [2022-01-19 06:41:41,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:41,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:41,279 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:41,279 INFO L186 Difference]: Start difference. First operand has 87 places, 74 transitions, 252 flow. Second operand 7 states and 389 transitions. [2022-01-19 06:41:41,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 86 transitions, 409 flow [2022-01-19 06:41:41,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 86 transitions, 383 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-01-19 06:41:41,283 INFO L242 Difference]: Finished difference. Result has 89 places, 77 transitions, 297 flow [2022-01-19 06:41:41,283 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=297, PETRI_PLACES=89, PETRI_TRANSITIONS=77} [2022-01-19 06:41:41,284 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 18 predicate places. [2022-01-19 06:41:41,284 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 77 transitions, 297 flow [2022-01-19 06:41:41,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:41:41,284 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 06:41:41,284 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] [2022-01-19 06:41:41,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 06:41:41,285 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 06:41:41,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 06:41:41,285 INFO L85 PathProgramCache]: Analyzing trace with hash -323089442, now seen corresponding path program 1 times [2022-01-19 06:41:41,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 06:41:41,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092365424] [2022-01-19 06:41:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 06:41:41,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 06:41:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 06:41:41,817 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 06:41:41,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 06:41:41,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092365424] [2022-01-19 06:41:41,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092365424] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 06:41:41,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848905004] [2022-01-19 06:41:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 06:41:41,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 06:41:41,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 06:41:41,820 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 06:41:41,854 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 06:41:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 06:41:42,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 06:41:42,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 06:41:59,244 INFO L884 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2022-01-19 06:42:58,484 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 06:42:58,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 06:43:23,108 INFO L884 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2022-01-19 06:43:23,465 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 06:43:23,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848905004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 06:43:23,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 06:43:23,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-19 06:43:23,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944662012] [2022-01-19 06:43:23,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 06:43:23,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-19 06:43:23,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 06:43:23,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-19 06:43:23,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=469, Unknown=7, NotChecked=0, Total=600 [2022-01-19 06:43:23,468 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-01-19 06:43:23,470 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 77 transitions, 297 flow. Second operand has 25 states, 25 states have (on average 51.92) internal successors, (1298), 25 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:43:23,470 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 06:43:23,470 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-01-19 06:43:23,470 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 06:43:35,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:43:40,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:43:43,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:43:48,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:43:51,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:43:53,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:43:59,087 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:44:00,502 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:44:09,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:44:11,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:44:12,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:44:14,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:44:16,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:44:35,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:44:39,691 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:44:45,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:44:47,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:44:54,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:44:56,898 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:45:01,166 INFO L129 PetriNetUnfolder]: 121/432 cut-off events. [2022-01-19 06:45:01,166 INFO L130 PetriNetUnfolder]: For 566/566 co-relation queries the response was YES. [2022-01-19 06:45:01,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1359 conditions, 432 events. 121/432 cut-off events. For 566/566 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2186 event pairs, 3 based on Foata normal form. 4/434 useless extension candidates. Maximal degree in co-relation 1346. Up to 74 conditions per place. [2022-01-19 06:45:01,170 INFO L132 encePairwiseOnDemand]: 67/81 looper letters, 75 selfloop transitions, 74 changer transitions 17/206 dead transitions. [2022-01-19 06:45:01,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 206 transitions, 1471 flow [2022-01-19 06:45:01,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-19 06:45:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-01-19 06:45:01,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1635 transitions. [2022-01-19 06:45:01,174 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6728395061728395 [2022-01-19 06:45:01,175 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1635 transitions. [2022-01-19 06:45:01,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1635 transitions. [2022-01-19 06:45:01,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 06:45:01,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1635 transitions. [2022-01-19 06:45:01,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 54.5) internal successors, (1635), 30 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:45:01,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 81.0) internal successors, (2511), 31 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:45:01,183 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 81.0) internal successors, (2511), 31 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:45:01,183 INFO L186 Difference]: Start difference. First operand has 89 places, 77 transitions, 297 flow. Second operand 30 states and 1635 transitions. [2022-01-19 06:45:01,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 206 transitions, 1471 flow [2022-01-19 06:45:01,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 206 transitions, 1434 flow, removed 14 selfloop flow, removed 3 redundant places. [2022-01-19 06:45:01,190 INFO L242 Difference]: Finished difference. Result has 130 places, 147 transitions, 1125 flow [2022-01-19 06:45:01,190 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1125, PETRI_PLACES=130, PETRI_TRANSITIONS=147} [2022-01-19 06:45:01,191 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 59 predicate places. [2022-01-19 06:45:01,191 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 147 transitions, 1125 flow [2022-01-19 06:45:01,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 51.92) internal successors, (1298), 25 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:45:01,192 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 06:45:01,192 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] [2022-01-19 06:45:01,199 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 06:45:01,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-19 06:45:01,396 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 06:45:01,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 06:45:01,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1331678400, now seen corresponding path program 2 times [2022-01-19 06:45:01,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 06:45:01,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420086326] [2022-01-19 06:45:01,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 06:45:01,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 06:45:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 06:45:01,675 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 06:45:01,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 06:45:01,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420086326] [2022-01-19 06:45:01,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420086326] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 06:45:01,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677897310] [2022-01-19 06:45:01,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 06:45:01,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 06:45:01,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 06:45:01,680 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 06:45:01,708 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 06:45:01,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 06:45:01,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 06:45:01,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 06:45:01,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 06:45:34,723 INFO L884 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2022-01-19 06:45:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 06:45:40,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 06:45:54,104 INFO L884 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2022-01-19 06:45:54,370 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 06:45:54,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677897310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 06:45:54,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 06:45:54,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-01-19 06:45:54,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037676735] [2022-01-19 06:45:54,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 06:45:54,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-19 06:45:54,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 06:45:54,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-19 06:45:54,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=494, Unknown=9, NotChecked=0, Total=650 [2022-01-19 06:45:54,372 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-01-19 06:45:54,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 147 transitions, 1125 flow. Second operand has 26 states, 26 states have (on average 51.96153846153846) internal successors, (1351), 26 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:45:54,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 06:45:54,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-01-19 06:45:54,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 06:45:56,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:45:57,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:45:59,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:10,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:15,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:18,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:20,283 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:22,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:24,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:26,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:28,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:46,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:49,118 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:51,145 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:53,261 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:55,394 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:57,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:46:58,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:01,357 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:02,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:08,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:10,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:12,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:17,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:20,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:22,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:24,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:26,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:29,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:31,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:34,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:36,087 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:38,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:47:58,043 WARN L228 SmtUtils]: Spent 14.49s on a formula simplification. DAG size of input: 73 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-19 06:48:24,389 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:48:26,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:48:28,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:48:31,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:48:33,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:48:40,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:48:43,469 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:48:45,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:48:46,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 06:48:52,601 INFO L129 PetriNetUnfolder]: 193/785 cut-off events. [2022-01-19 06:48:52,601 INFO L130 PetriNetUnfolder]: For 2261/2264 co-relation queries the response was YES. [2022-01-19 06:48:52,604 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3052 conditions, 785 events. 193/785 cut-off events. For 2261/2264 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5213 event pairs, 10 based on Foata normal form. 6/789 useless extension candidates. Maximal degree in co-relation 3024. Up to 172 conditions per place. [2022-01-19 06:48:52,608 INFO L132 encePairwiseOnDemand]: 67/81 looper letters, 126 selfloop transitions, 153 changer transitions 15/334 dead transitions. [2022-01-19 06:48:52,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 334 transitions, 3396 flow [2022-01-19 06:48:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-19 06:48:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-01-19 06:48:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1980 transitions. [2022-01-19 06:48:52,613 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6790123456790124 [2022-01-19 06:48:52,613 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1980 transitions. [2022-01-19 06:48:52,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1980 transitions. [2022-01-19 06:48:52,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 06:48:52,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1980 transitions. [2022-01-19 06:48:52,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.0) internal successors, (1980), 36 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:48:52,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 81.0) internal successors, (2997), 37 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:48:52,623 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 81.0) internal successors, (2997), 37 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:48:52,623 INFO L186 Difference]: Start difference. First operand has 130 places, 147 transitions, 1125 flow. Second operand 36 states and 1980 transitions. [2022-01-19 06:48:52,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 334 transitions, 3396 flow [2022-01-19 06:48:52,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 334 transitions, 3058 flow, removed 161 selfloop flow, removed 11 redundant places. [2022-01-19 06:48:52,642 INFO L242 Difference]: Finished difference. Result has 167 places, 243 transitions, 2566 flow [2022-01-19 06:48:52,643 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2566, PETRI_PLACES=167, PETRI_TRANSITIONS=243} [2022-01-19 06:48:52,643 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 96 predicate places. [2022-01-19 06:48:52,643 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 243 transitions, 2566 flow [2022-01-19 06:48:52,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 51.96153846153846) internal successors, (1351), 26 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:48:52,644 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 06:48:52,644 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 06:48:52,655 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 06:48:52,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 06:48:52,848 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 06:48:52,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 06:48:52,848 INFO L85 PathProgramCache]: Analyzing trace with hash 434419504, now seen corresponding path program 3 times [2022-01-19 06:48:52,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 06:48:52,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243930166] [2022-01-19 06:48:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 06:48:52,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 06:48:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 06:48:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 06:48:53,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 06:48:53,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243930166] [2022-01-19 06:48:53,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243930166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 06:48:53,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39087298] [2022-01-19 06:48:53,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 06:48:53,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 06:48:53,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 06:48:53,027 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 06:48:53,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process Received shutdown request... [2022-01-19 06:56:14,478 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 06:56:14,478 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 06:56:15,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2022-01-19 06:56:15,684 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forcibly destroying the process [2022-01-19 06:56:15,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 137 [2022-01-19 06:56:15,691 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-19 06:56:15,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-19 06:56:15,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-01-19 06:56:15,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477869669] [2022-01-19 06:56:15,691 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-19 06:56:15,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 06:56:15,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 06:56:15,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 06:56:15,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-19 06:56:15,693 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-01-19 06:56:15,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 243 transitions, 2566 flow. Second operand has 8 states, 8 states have (on average 53.25) internal successors, (426), 8 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 06:56:15,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 06:56:15,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-01-19 06:56:15,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 06:56:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 06:56:15,695 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 06:56:15,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-19 06:56:15,695 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (8states, 50/81 universal loopers) in iteration 8,while PetriNetUnfolder was constructing finite prefix that currently has 42 conditions, 2 events (0/1 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 0/2 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). [2022-01-19 06:56:15,697 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 06:56:15,697 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 06:56:15,699 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1] [2022-01-19 06:56:15,701 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 06:56:15,701 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 06:56:15,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 06:56:15 BasicIcfg [2022-01-19 06:56:15,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 06:56:15,705 INFO L158 Benchmark]: Toolchain (without parser) took 877996.36ms. Allocated memory was 390.1MB in the beginning and 469.8MB in the end (delta: 79.7MB). Free memory was 331.7MB in the beginning and 300.0MB in the end (delta: 31.7MB). Peak memory consumption was 111.8MB. Max. memory is 16.0GB. [2022-01-19 06:56:15,705 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 390.1MB. Free memory is still 348.0MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 06:56:15,706 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.43ms. Allocated memory was 390.1MB in the beginning and 469.8MB in the end (delta: 79.7MB). Free memory was 331.5MB in the beginning and 439.4MB in the end (delta: -107.9MB). Peak memory consumption was 7.2MB. Max. memory is 16.0GB. [2022-01-19 06:56:15,706 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.92ms. Allocated memory is still 469.8MB. Free memory was 439.4MB in the beginning and 437.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 06:56:15,706 INFO L158 Benchmark]: Boogie Preprocessor took 18.29ms. Allocated memory is still 469.8MB. Free memory was 437.3MB in the beginning and 436.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 06:56:15,707 INFO L158 Benchmark]: RCFGBuilder took 272.24ms. Allocated memory is still 469.8MB. Free memory was 436.2MB in the beginning and 422.6MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-19 06:56:15,707 INFO L158 Benchmark]: TraceAbstraction took 877474.93ms. Allocated memory is still 469.8MB. Free memory was 422.6MB in the beginning and 300.0MB in the end (delta: 122.6MB). Peak memory consumption was 124.7MB. Max. memory is 16.0GB. [2022-01-19 06:56:15,708 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 390.1MB. Free memory is still 348.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 197.43ms. Allocated memory was 390.1MB in the beginning and 469.8MB in the end (delta: 79.7MB). Free memory was 331.5MB in the beginning and 439.4MB in the end (delta: -107.9MB). Peak memory consumption was 7.2MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.92ms. Allocated memory is still 469.8MB. Free memory was 439.4MB in the beginning and 437.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.29ms. Allocated memory is still 469.8MB. Free memory was 437.3MB in the beginning and 436.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 272.24ms. Allocated memory is still 469.8MB. Free memory was 436.2MB in the beginning and 422.6MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 877474.93ms. Allocated memory is still 469.8MB. Free memory was 422.6MB in the beginning and 300.0MB in the end (delta: 122.6MB). Peak memory consumption was 124.7MB. 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: 70]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (8states, 50/81 universal loopers) in iteration 8,while PetriNetUnfolder was constructing finite prefix that currently has 42 conditions, 2 events (0/1 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 0/2 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (8states, 50/81 universal loopers) in iteration 8,while PetriNetUnfolder was constructing finite prefix that currently has 42 conditions, 2 events (0/1 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 0/2 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (8states, 50/81 universal loopers) in iteration 8,while PetriNetUnfolder was constructing finite prefix that currently has 42 conditions, 2 events (0/1 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 0/2 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 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: 877.3s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 276.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 39 mSolverCounterUnknown, 546 SdHoareTripleChecker+Valid, 160.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 546 mSDsluCounter, 357 SdHoareTripleChecker+Invalid, 159.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 627 mSDsCounter, 119 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1806 IncrementalHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 119 mSolverCounterUnsat, 80 mSDtfsCounter, 1806 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 490 GetRequests, 351 SyntacticMatches, 10 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 195.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2566occurred in iteration=7, InterpolantAutomatonStates: 99, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 155.9s InterpolantComputationTime, 690 NumberOfCodeBlocks, 690 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 866 ConstructedInterpolants, 0 QuantifiedInterpolants, 13742 SizeOfPredicates, 24 NumberOfNonLiveVariables, 435 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 2/22 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