/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-After.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 13:25:03,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 13:25:03,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 13:25:03,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 13:25:03,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 13:25:03,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 13:25:03,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 13:25:03,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 13:25:03,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 13:25:03,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 13:25:03,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 13:25:03,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 13:25:03,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 13:25:03,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 13:25:03,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 13:25:03,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 13:25:03,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 13:25:03,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 13:25:03,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 13:25:03,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 13:25:03,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 13:25:03,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 13:25:03,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 13:25:03,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 13:25:03,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 13:25:03,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 13:25:03,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 13:25:03,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 13:25:03,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 13:25:03,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 13:25:03,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 13:25:03,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 13:25:03,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 13:25:03,762 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 13:25:03,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 13:25:03,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 13:25:03,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 13:25:03,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 13:25:03,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 13:25:03,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 13:25:03,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 13:25:03,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-After.epf [2022-01-19 13:25:03,799 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 13:25:03,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 13:25:03,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 13:25:03,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 13:25:03,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 13:25:03,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 13:25:03,801 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 13:25:03,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 13:25:03,801 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 13:25:03,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 13:25:03,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 13:25:03,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 13:25:03,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 13:25:03,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 13:25:03,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 13:25:03,802 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 13:25:03,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 13:25:03,802 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 13:25:03,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 13:25:03,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 13:25:03,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 13:25:03,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 13:25:03,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 13:25:03,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 13:25:03,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 13:25:03,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 13:25:03,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 13:25:03,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 13:25:03,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 13:25:03,807 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 13:25:03,807 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 13:25:03,807 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=AFTER [2022-01-19 13:25:03,807 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 13:25:03,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 13:25:04,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 13:25:04,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 13:25:04,014 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 13:25:04,014 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 13:25:04,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2022-01-19 13:25:04,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10a6ec262/90bbc8e99f4d4c9997eec52d7bf1bdd7/FLAG3c32cace2 [2022-01-19 13:25:04,487 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 13:25:04,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2022-01-19 13:25:04,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10a6ec262/90bbc8e99f4d4c9997eec52d7bf1bdd7/FLAG3c32cace2 [2022-01-19 13:25:04,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10a6ec262/90bbc8e99f4d4c9997eec52d7bf1bdd7 [2022-01-19 13:25:04,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 13:25:04,519 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 13:25:04,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 13:25:04,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 13:25:04,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 13:25:04,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:25:04" (1/1) ... [2022-01-19 13:25:04,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@598eb1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:25:04, skipping insertion in model container [2022-01-19 13:25:04,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:25:04" (1/1) ... [2022-01-19 13:25:04,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 13:25:04,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 13:25:04,745 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/mult-comm.wvr.c[1910,1923] [2022-01-19 13:25:04,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 13:25:04,761 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 13:25:04,793 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/mult-comm.wvr.c[1910,1923] [2022-01-19 13:25:04,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 13:25:04,811 INFO L208 MainTranslator]: Completed translation [2022-01-19 13:25:04,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:25:04 WrapperNode [2022-01-19 13:25:04,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 13:25:04,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 13:25:04,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 13:25:04,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 13:25:04,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:25:04" (1/1) ... [2022-01-19 13:25:04,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:25:04" (1/1) ... [2022-01-19 13:25:04,845 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-01-19 13:25:04,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 13:25:04,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 13:25:04,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 13:25:04,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 13:25:04,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:25:04" (1/1) ... [2022-01-19 13:25:04,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:25:04" (1/1) ... [2022-01-19 13:25:04,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:25:04" (1/1) ... [2022-01-19 13:25:04,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:25:04" (1/1) ... [2022-01-19 13:25:04,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:25:04" (1/1) ... [2022-01-19 13:25:04,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:25:04" (1/1) ... [2022-01-19 13:25:04,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:25:04" (1/1) ... [2022-01-19 13:25:04,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 13:25:04,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 13:25:04,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 13:25:04,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 13:25:04,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:25:04" (1/1) ... [2022-01-19 13:25:04,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 13:25:04,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:25:04,894 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 13:25:04,907 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 13:25:04,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 13:25:04,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 13:25:04,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 13:25:04,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 13:25:04,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 13:25:04,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 13:25:04,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 13:25:04,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 13:25:04,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 13:25:04,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 13:25:04,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 13:25:04,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 13:25:04,927 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 13:25:05,004 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 13:25:05,005 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 13:25:05,183 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 13:25:05,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 13:25:05,189 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 13:25:05,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:25:05 BoogieIcfgContainer [2022-01-19 13:25:05,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 13:25:05,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 13:25:05,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 13:25:05,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 13:25:05,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 01:25:04" (1/3) ... [2022-01-19 13:25:05,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd76391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:25:05, skipping insertion in model container [2022-01-19 13:25:05,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:25:04" (2/3) ... [2022-01-19 13:25:05,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd76391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:25:05, skipping insertion in model container [2022-01-19 13:25:05,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:25:05" (3/3) ... [2022-01-19 13:25:05,198 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2022-01-19 13:25:05,202 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 13:25:05,203 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 13:25:05,203 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 13:25:05,229 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,230 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,230 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,230 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,231 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,231 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,232 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,232 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,232 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,232 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,233 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,233 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,233 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,233 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,233 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,233 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,234 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,234 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,234 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,234 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,235 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,235 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,235 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,236 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,236 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,237 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,238 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,238 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,238 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,238 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,239 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,239 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,239 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,239 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,239 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,239 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,240 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,240 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,243 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,243 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,243 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,243 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,245 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,246 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,246 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,246 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 13:25:05,249 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 13:25:05,290 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 13:25:05,296 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 13:25:05,296 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 13:25:05,305 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 176 flow [2022-01-19 13:25:05,351 INFO L129 PetriNetUnfolder]: 5/78 cut-off events. [2022-01-19 13:25:05,351 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 13:25:05,354 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2022-01-19 13:25:05,354 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 176 flow [2022-01-19 13:25:05,358 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 150 flow [2022-01-19 13:25:05,374 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-01-19 13:25:05,374 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 13:25:05,374 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:25:05,375 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] [2022-01-19 13:25:05,375 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:25:05,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:25:05,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1776550383, now seen corresponding path program 1 times [2022-01-19 13:25:05,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:25:05,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979381139] [2022-01-19 13:25:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:25:05,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:25:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:25:05,581 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 13:25:05,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:25:05,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979381139] [2022-01-19 13:25:05,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979381139] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:25:05,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:25:05,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 13:25:05,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102088317] [2022-01-19 13:25:05,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:25:05,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 13:25:05,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:25:05,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 13:25:05,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 13:25:05,627 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 80 [2022-01-19 13:25:05,629 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:05,630 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:25:05,630 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 80 [2022-01-19 13:25:05,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:25:05,671 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2022-01-19 13:25:05,672 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 13:25:05,673 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 44 event pairs, 0 based on Foata normal form. 5/68 useless extension candidates. Maximal degree in co-relation 43. Up to 5 conditions per place. [2022-01-19 13:25:05,675 INFO L132 encePairwiseOnDemand]: 77/80 looper letters, 4 selfloop transitions, 0 changer transitions 1/66 dead transitions. [2022-01-19 13:25:05,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 152 flow [2022-01-19 13:25:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 13:25:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 13:25:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 151 transitions. [2022-01-19 13:25:05,698 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.94375 [2022-01-19 13:25:05,699 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 151 transitions. [2022-01-19 13:25:05,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 151 transitions. [2022-01-19 13:25:05,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:25:05,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 151 transitions. [2022-01-19 13:25:05,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:05,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:05,714 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:05,716 INFO L186 Difference]: Start difference. First operand has 71 places, 69 transitions, 150 flow. Second operand 2 states and 151 transitions. [2022-01-19 13:25:05,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 152 flow [2022-01-19 13:25:05,722 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 13:25:05,727 INFO L242 Difference]: Finished difference. Result has 68 places, 65 transitions, 134 flow [2022-01-19 13:25:05,729 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, 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=134, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2022-01-19 13:25:05,733 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-01-19 13:25:05,733 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 134 flow [2022-01-19 13:25:05,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:05,733 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:25:05,734 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] [2022-01-19 13:25:05,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 13:25:05,734 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:25:05,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:25:05,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1061161231, now seen corresponding path program 1 times [2022-01-19 13:25:05,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:25:05,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338692304] [2022-01-19 13:25:05,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:25:05,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:25:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:25:06,026 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 13:25:06,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:25:06,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338692304] [2022-01-19 13:25:06,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338692304] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 13:25:06,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 13:25:06,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 13:25:06,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775484666] [2022-01-19 13:25:06,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:25:06,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 13:25:06,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:25:06,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 13:25:06,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 13:25:06,031 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 80 [2022-01-19 13:25:06,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:06,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:25:06,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 80 [2022-01-19 13:25:06,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:25:06,142 INFO L129 PetriNetUnfolder]: 12/126 cut-off events. [2022-01-19 13:25:06,142 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 13:25:06,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 126 events. 12/126 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 298 event pairs, 1 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 166. Up to 19 conditions per place. [2022-01-19 13:25:06,145 INFO L132 encePairwiseOnDemand]: 73/80 looper letters, 19 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-01-19 13:25:06,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 227 flow [2022-01-19 13:25:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 13:25:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 13:25:06,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 407 transitions. [2022-01-19 13:25:06,153 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8479166666666667 [2022-01-19 13:25:06,153 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 407 transitions. [2022-01-19 13:25:06,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 407 transitions. [2022-01-19 13:25:06,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:25:06,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 407 transitions. [2022-01-19 13:25:06,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:06,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:06,160 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:06,160 INFO L186 Difference]: Start difference. First operand has 68 places, 65 transitions, 134 flow. Second operand 6 states and 407 transitions. [2022-01-19 13:25:06,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 227 flow [2022-01-19 13:25:06,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 13:25:06,164 INFO L242 Difference]: Finished difference. Result has 75 places, 68 transitions, 163 flow [2022-01-19 13:25:06,164 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-01-19 13:25:06,164 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-01-19 13:25:06,165 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 163 flow [2022-01-19 13:25:06,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:06,165 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:25:06,165 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 13:25:06,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 13:25:06,166 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:25:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:25:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1738455513, now seen corresponding path program 1 times [2022-01-19 13:25:06,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:25:06,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240321628] [2022-01-19 13:25:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:25:06,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:25:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:25:06,521 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 13:25:06,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:25:06,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240321628] [2022-01-19 13:25:06,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240321628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:25:06,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093067296] [2022-01-19 13:25:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:25:06,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:25:06,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:25:06,527 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 13:25:06,551 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 13:25:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:25:06,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 13:25:06,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:25:07,038 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 13:25:07,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:25:07,545 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 13:25:07,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093067296] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:25:07,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:25:07,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 17 [2022-01-19 13:25:07,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710910180] [2022-01-19 13:25:07,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:25:07,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 13:25:07,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:25:07,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 13:25:07,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-19 13:25:07,550 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-01-19 13:25:07,551 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 163 flow. Second operand has 17 states, 17 states have (on average 53.76470588235294) internal successors, (914), 17 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:07,551 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:25:07,551 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-01-19 13:25:07,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:25:08,070 INFO L129 PetriNetUnfolder]: 174/573 cut-off events. [2022-01-19 13:25:08,071 INFO L130 PetriNetUnfolder]: For 74/83 co-relation queries the response was YES. [2022-01-19 13:25:08,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 573 events. 174/573 cut-off events. For 74/83 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3194 event pairs, 15 based on Foata normal form. 4/499 useless extension candidates. Maximal degree in co-relation 1080. Up to 82 conditions per place. [2022-01-19 13:25:08,076 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 93 selfloop transitions, 31 changer transitions 19/184 dead transitions. [2022-01-19 13:25:08,076 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 184 transitions, 763 flow [2022-01-19 13:25:08,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-19 13:25:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-01-19 13:25:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1217 transitions. [2022-01-19 13:25:08,080 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7244047619047619 [2022-01-19 13:25:08,080 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1217 transitions. [2022-01-19 13:25:08,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1217 transitions. [2022-01-19 13:25:08,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:25:08,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1217 transitions. [2022-01-19 13:25:08,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.95238095238095) internal successors, (1217), 21 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:08,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 80.0) internal successors, (1760), 22 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:08,088 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 80.0) internal successors, (1760), 22 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:08,089 INFO L186 Difference]: Start difference. First operand has 75 places, 68 transitions, 163 flow. Second operand 21 states and 1217 transitions. [2022-01-19 13:25:08,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 184 transitions, 763 flow [2022-01-19 13:25:08,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 184 transitions, 741 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-01-19 13:25:08,094 INFO L242 Difference]: Finished difference. Result has 107 places, 92 transitions, 391 flow [2022-01-19 13:25:08,094 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=391, PETRI_PLACES=107, PETRI_TRANSITIONS=92} [2022-01-19 13:25:08,095 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2022-01-19 13:25:08,095 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 92 transitions, 391 flow [2022-01-19 13:25:08,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 53.76470588235294) internal successors, (914), 17 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:08,096 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:25:08,096 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 13:25:08,123 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 13:25:08,309 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 13:25:08,310 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:25:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:25:08,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1154719639, now seen corresponding path program 1 times [2022-01-19 13:25:08,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:25:08,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255613467] [2022-01-19 13:25:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:25:08,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:25:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:25:08,461 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 13:25:08,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:25:08,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255613467] [2022-01-19 13:25:08,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255613467] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:25:08,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650184007] [2022-01-19 13:25:08,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:25:08,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:25:08,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:25:08,464 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 13:25:08,475 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 13:25:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:25:08,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-19 13:25:08,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:25:08,857 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 13:25:08,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:25:09,655 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 13:25:09,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650184007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:25:09,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:25:09,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 13 [2022-01-19 13:25:09,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803421692] [2022-01-19 13:25:09,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:25:09,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 13:25:09,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:25:09,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 13:25:09,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-19 13:25:09,659 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-01-19 13:25:09,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 92 transitions, 391 flow. Second operand has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:09,660 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:25:09,660 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-01-19 13:25:09,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:25:10,065 INFO L129 PetriNetUnfolder]: 74/389 cut-off events. [2022-01-19 13:25:10,065 INFO L130 PetriNetUnfolder]: For 403/428 co-relation queries the response was YES. [2022-01-19 13:25:10,067 INFO L84 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 389 events. 74/389 cut-off events. For 403/428 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2086 event pairs, 5 based on Foata normal form. 17/382 useless extension candidates. Maximal degree in co-relation 914. Up to 142 conditions per place. [2022-01-19 13:25:10,069 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 39 selfloop transitions, 10 changer transitions 11/114 dead transitions. [2022-01-19 13:25:10,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 114 transitions, 609 flow [2022-01-19 13:25:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 13:25:10,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 13:25:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 608 transitions. [2022-01-19 13:25:10,071 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.76 [2022-01-19 13:25:10,071 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 608 transitions. [2022-01-19 13:25:10,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 608 transitions. [2022-01-19 13:25:10,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:25:10,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 608 transitions. [2022-01-19 13:25:10,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.8) internal successors, (608), 10 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:10,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:10,075 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:10,075 INFO L186 Difference]: Start difference. First operand has 107 places, 92 transitions, 391 flow. Second operand 10 states and 608 transitions. [2022-01-19 13:25:10,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 114 transitions, 609 flow [2022-01-19 13:25:10,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 114 transitions, 533 flow, removed 29 selfloop flow, removed 10 redundant places. [2022-01-19 13:25:10,082 INFO L242 Difference]: Finished difference. Result has 104 places, 92 transitions, 368 flow [2022-01-19 13:25:10,082 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=368, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2022-01-19 13:25:10,083 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 33 predicate places. [2022-01-19 13:25:10,083 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 368 flow [2022-01-19 13:25:10,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:10,084 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:25:10,084 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 13:25:10,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-19 13:25:10,298 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,SelfDestructingSolverStorable3 [2022-01-19 13:25:10,299 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:25:10,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:25:10,299 INFO L85 PathProgramCache]: Analyzing trace with hash -837475069, now seen corresponding path program 2 times [2022-01-19 13:25:10,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:25:10,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426294415] [2022-01-19 13:25:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:25:10,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:25:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:25:10,428 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 13:25:10,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:25:10,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426294415] [2022-01-19 13:25:10,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426294415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:25:10,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306911466] [2022-01-19 13:25:10,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 13:25:10,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:25:10,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:25:10,430 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 13:25:10,458 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 13:25:10,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 13:25:10,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:25:10,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 13:25:10,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:25:10,758 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 13:25:10,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:25:11,042 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 13:25:11,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306911466] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-19 13:25:11,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-19 13:25:11,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 16 [2022-01-19 13:25:11,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959455015] [2022-01-19 13:25:11,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:25:11,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 13:25:11,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:25:11,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 13:25:11,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-01-19 13:25:11,045 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-01-19 13:25:11,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 368 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:11,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:25:11,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-01-19 13:25:11,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:25:11,301 INFO L129 PetriNetUnfolder]: 171/584 cut-off events. [2022-01-19 13:25:11,301 INFO L130 PetriNetUnfolder]: For 527/527 co-relation queries the response was YES. [2022-01-19 13:25:11,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 584 events. 171/584 cut-off events. For 527/527 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3358 event pairs, 62 based on Foata normal form. 1/579 useless extension candidates. Maximal degree in co-relation 1454. Up to 222 conditions per place. [2022-01-19 13:25:11,307 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 68 selfloop transitions, 24 changer transitions 6/139 dead transitions. [2022-01-19 13:25:11,307 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 139 transitions, 769 flow [2022-01-19 13:25:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 13:25:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 13:25:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 589 transitions. [2022-01-19 13:25:11,309 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.73625 [2022-01-19 13:25:11,309 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 589 transitions. [2022-01-19 13:25:11,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 589 transitions. [2022-01-19 13:25:11,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:25:11,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 589 transitions. [2022-01-19 13:25:11,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.9) internal successors, (589), 10 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:11,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:11,315 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:11,315 INFO L186 Difference]: Start difference. First operand has 104 places, 92 transitions, 368 flow. Second operand 10 states and 589 transitions. [2022-01-19 13:25:11,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 139 transitions, 769 flow [2022-01-19 13:25:11,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 139 transitions, 721 flow, removed 15 selfloop flow, removed 7 redundant places. [2022-01-19 13:25:11,321 INFO L242 Difference]: Finished difference. Result has 107 places, 100 transitions, 495 flow [2022-01-19 13:25:11,321 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=495, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2022-01-19 13:25:11,324 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2022-01-19 13:25:11,324 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 495 flow [2022-01-19 13:25:11,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:11,324 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:25:11,324 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 13:25:11,353 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 13:25:11,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:25:11,552 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:25:11,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:25:11,552 INFO L85 PathProgramCache]: Analyzing trace with hash 852200369, now seen corresponding path program 3 times [2022-01-19 13:25:11,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:25:11,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859468634] [2022-01-19 13:25:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:25:11,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:25:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:25:11,667 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 13:25:11,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:25:11,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859468634] [2022-01-19 13:25:11,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859468634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:25:11,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163550413] [2022-01-19 13:25:11,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 13:25:11,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:25:11,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:25:11,670 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 13:25:11,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 13:25:11,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 13:25:11,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:25:11,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 13:25:11,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:25:12,000 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 13:25:12,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:25:12,262 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 13:25:12,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163550413] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-19 13:25:12,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-19 13:25:12,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 15 [2022-01-19 13:25:12,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321100794] [2022-01-19 13:25:12,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 13:25:12,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 13:25:12,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:25:12,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 13:25:12,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-19 13:25:12,265 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-01-19 13:25:12,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 495 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:12,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:25:12,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-01-19 13:25:12,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:25:12,677 INFO L129 PetriNetUnfolder]: 171/587 cut-off events. [2022-01-19 13:25:12,678 INFO L130 PetriNetUnfolder]: For 907/907 co-relation queries the response was YES. [2022-01-19 13:25:12,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1644 conditions, 587 events. 171/587 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3422 event pairs, 70 based on Foata normal form. 2/581 useless extension candidates. Maximal degree in co-relation 1624. Up to 290 conditions per place. [2022-01-19 13:25:12,682 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 63 selfloop transitions, 11 changer transitions 14/129 dead transitions. [2022-01-19 13:25:12,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 129 transitions, 800 flow [2022-01-19 13:25:12,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 13:25:12,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 13:25:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2022-01-19 13:25:12,684 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2022-01-19 13:25:12,684 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 520 transitions. [2022-01-19 13:25:12,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 520 transitions. [2022-01-19 13:25:12,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:25:12,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 520 transitions. [2022-01-19 13:25:12,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.77777777777778) internal successors, (520), 9 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:12,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:12,687 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:12,688 INFO L186 Difference]: Start difference. First operand has 107 places, 100 transitions, 495 flow. Second operand 9 states and 520 transitions. [2022-01-19 13:25:12,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 129 transitions, 800 flow [2022-01-19 13:25:12,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 129 transitions, 762 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-01-19 13:25:12,694 INFO L242 Difference]: Finished difference. Result has 112 places, 100 transitions, 498 flow [2022-01-19 13:25:12,695 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=498, PETRI_PLACES=112, PETRI_TRANSITIONS=100} [2022-01-19 13:25:12,695 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 41 predicate places. [2022-01-19 13:25:12,695 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 100 transitions, 498 flow [2022-01-19 13:25:12,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:12,696 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:25:12,696 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 13:25:12,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 13:25:12,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:25:12,911 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:25:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:25:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1402773219, now seen corresponding path program 2 times [2022-01-19 13:25:12,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:25:12,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101893850] [2022-01-19 13:25:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:25:12,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:25:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:25:13,056 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 13:25:13,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:25:13,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101893850] [2022-01-19 13:25:13,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101893850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:25:13,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367112316] [2022-01-19 13:25:13,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 13:25:13,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:25:13,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:25:13,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:25:13,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 13:25:13,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 13:25:13,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:25:13,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 13:25:13,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:25:13,376 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 13:25:13,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:25:13,721 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 13:25:13,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367112316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:25:13,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:25:13,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2022-01-19 13:25:13,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984422589] [2022-01-19 13:25:13,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:25:13,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-19 13:25:13,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:25:13,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-19 13:25:13,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-19 13:25:13,724 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-01-19 13:25:13,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 100 transitions, 498 flow. Second operand has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:13,725 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:25:13,725 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-01-19 13:25:13,725 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:25:14,176 INFO L129 PetriNetUnfolder]: 86/442 cut-off events. [2022-01-19 13:25:14,176 INFO L130 PetriNetUnfolder]: For 721/755 co-relation queries the response was YES. [2022-01-19 13:25:14,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1130 conditions, 442 events. 86/442 cut-off events. For 721/755 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2395 event pairs, 11 based on Foata normal form. 21/453 useless extension candidates. Maximal degree in co-relation 1108. Up to 138 conditions per place. [2022-01-19 13:25:14,180 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 45 selfloop transitions, 41 changer transitions 12/154 dead transitions. [2022-01-19 13:25:14,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 154 transitions, 981 flow [2022-01-19 13:25:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-19 13:25:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-01-19 13:25:14,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1026 transitions. [2022-01-19 13:25:14,183 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7544117647058823 [2022-01-19 13:25:14,183 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1026 transitions. [2022-01-19 13:25:14,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1026 transitions. [2022-01-19 13:25:14,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:25:14,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1026 transitions. [2022-01-19 13:25:14,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.35294117647059) internal successors, (1026), 17 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:14,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:14,189 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:14,189 INFO L186 Difference]: Start difference. First operand has 112 places, 100 transitions, 498 flow. Second operand 17 states and 1026 transitions. [2022-01-19 13:25:14,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 154 transitions, 981 flow [2022-01-19 13:25:14,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 921 flow, removed 16 selfloop flow, removed 8 redundant places. [2022-01-19 13:25:14,195 INFO L242 Difference]: Finished difference. Result has 131 places, 121 transitions, 805 flow [2022-01-19 13:25:14,195 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=805, PETRI_PLACES=131, PETRI_TRANSITIONS=121} [2022-01-19 13:25:14,196 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 60 predicate places. [2022-01-19 13:25:14,196 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 121 transitions, 805 flow [2022-01-19 13:25:14,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:14,197 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:25:14,197 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 13:25:14,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-19 13:25:14,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:25:14,414 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:25:14,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:25:14,414 INFO L85 PathProgramCache]: Analyzing trace with hash -725373525, now seen corresponding path program 3 times [2022-01-19 13:25:14,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:25:14,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021800834] [2022-01-19 13:25:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:25:14,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:25:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:25:14,637 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 13:25:14,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:25:14,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021800834] [2022-01-19 13:25:14,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021800834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:25:14,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572629001] [2022-01-19 13:25:14,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 13:25:14,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:25:14,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:25:14,644 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:25:14,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 13:25:14,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 13:25:14,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:25:14,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 13:25:14,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:25:14,954 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 13:25:14,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:25:15,240 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 13:25:15,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572629001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:25:15,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:25:15,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-19 13:25:15,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475990712] [2022-01-19 13:25:15,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:25:15,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-19 13:25:15,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:25:15,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-19 13:25:15,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-01-19 13:25:15,243 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-01-19 13:25:15,244 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 121 transitions, 805 flow. Second operand has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:15,244 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:25:15,244 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-01-19 13:25:15,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:25:15,509 INFO L129 PetriNetUnfolder]: 101/536 cut-off events. [2022-01-19 13:25:15,509 INFO L130 PetriNetUnfolder]: For 1320/1372 co-relation queries the response was YES. [2022-01-19 13:25:15,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 536 events. 101/536 cut-off events. For 1320/1372 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3179 event pairs, 14 based on Foata normal form. 25/552 useless extension candidates. Maximal degree in co-relation 1564. Up to 139 conditions per place. [2022-01-19 13:25:15,514 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 40 selfloop transitions, 61 changer transitions 9/166 dead transitions. [2022-01-19 13:25:15,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 166 transitions, 1359 flow [2022-01-19 13:25:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 13:25:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 13:25:15,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1077 transitions. [2022-01-19 13:25:15,517 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7479166666666667 [2022-01-19 13:25:15,517 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1077 transitions. [2022-01-19 13:25:15,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1077 transitions. [2022-01-19 13:25:15,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:25:15,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1077 transitions. [2022-01-19 13:25:15,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 59.833333333333336) internal successors, (1077), 18 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:15,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:15,524 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:15,524 INFO L186 Difference]: Start difference. First operand has 131 places, 121 transitions, 805 flow. Second operand 18 states and 1077 transitions. [2022-01-19 13:25:15,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 166 transitions, 1359 flow [2022-01-19 13:25:15,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 166 transitions, 1312 flow, removed 20 selfloop flow, removed 8 redundant places. [2022-01-19 13:25:15,538 INFO L242 Difference]: Finished difference. Result has 143 places, 143 transitions, 1157 flow [2022-01-19 13:25:15,539 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1157, PETRI_PLACES=143, PETRI_TRANSITIONS=143} [2022-01-19 13:25:15,540 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 72 predicate places. [2022-01-19 13:25:15,540 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 143 transitions, 1157 flow [2022-01-19 13:25:15,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:25:15,541 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:25:15,541 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:25:15,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 13:25:15,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:25:15,767 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:25:15,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:25:15,768 INFO L85 PathProgramCache]: Analyzing trace with hash -378455913, now seen corresponding path program 1 times [2022-01-19 13:25:15,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:25:15,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460366226] [2022-01-19 13:25:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:25:15,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:25:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:25:16,609 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 13:25:16,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:25:16,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460366226] [2022-01-19 13:25:16,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460366226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:25:16,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671851587] [2022-01-19 13:25:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:25:16,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:25:16,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:25:16,611 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:25:16,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 13:25:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:25:16,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 13:25:16,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:25:18,102 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 13:25:18,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:26:10,413 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 13:26:10,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671851587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:26:10,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:26:10,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 39 [2022-01-19 13:26:10,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702907040] [2022-01-19 13:26:10,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:26:10,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-19 13:26:10,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:26:10,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-19 13:26:10,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2022-01-19 13:26:10,417 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 13:26:10,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 143 transitions, 1157 flow. Second operand has 39 states, 39 states have (on average 48.666666666666664) internal successors, (1898), 39 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:26:10,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:26:10,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 13:26:10,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:26:16,135 INFO L129 PetriNetUnfolder]: 431/1402 cut-off events. [2022-01-19 13:26:16,136 INFO L130 PetriNetUnfolder]: For 4330/4330 co-relation queries the response was YES. [2022-01-19 13:26:16,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4854 conditions, 1402 events. 431/1402 cut-off events. For 4330/4330 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10650 event pairs, 44 based on Foata normal form. 1/1399 useless extension candidates. Maximal degree in co-relation 4818. Up to 329 conditions per place. [2022-01-19 13:26:16,151 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 129 selfloop transitions, 198 changer transitions 24/388 dead transitions. [2022-01-19 13:26:16,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 388 transitions, 3572 flow [2022-01-19 13:26:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-19 13:26:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-01-19 13:26:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2632 transitions. [2022-01-19 13:26:16,158 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6450980392156863 [2022-01-19 13:26:16,158 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2632 transitions. [2022-01-19 13:26:16,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2632 transitions. [2022-01-19 13:26:16,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:26:16,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2632 transitions. [2022-01-19 13:26:16,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 51.6078431372549) internal successors, (2632), 51 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:26:16,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 80.0) internal successors, (4160), 52 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:26:16,176 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 80.0) internal successors, (4160), 52 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:26:16,177 INFO L186 Difference]: Start difference. First operand has 143 places, 143 transitions, 1157 flow. Second operand 51 states and 2632 transitions. [2022-01-19 13:26:16,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 388 transitions, 3572 flow [2022-01-19 13:26:16,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 388 transitions, 3245 flow, removed 47 selfloop flow, removed 10 redundant places. [2022-01-19 13:26:16,207 INFO L242 Difference]: Finished difference. Result has 199 places, 278 transitions, 2731 flow [2022-01-19 13:26:16,207 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=2731, PETRI_PLACES=199, PETRI_TRANSITIONS=278} [2022-01-19 13:26:16,208 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 128 predicate places. [2022-01-19 13:26:16,208 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 278 transitions, 2731 flow [2022-01-19 13:26:16,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 48.666666666666664) internal successors, (1898), 39 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:26:16,209 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:26:16,209 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:26:16,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 13:26:16,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:26:16,410 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:26:16,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:26:16,410 INFO L85 PathProgramCache]: Analyzing trace with hash 904298003, now seen corresponding path program 2 times [2022-01-19 13:26:16,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:26:16,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127860625] [2022-01-19 13:26:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:26:16,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:26:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:26:16,952 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 13:26:16,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:26:16,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127860625] [2022-01-19 13:26:16,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127860625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:26:16,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971310773] [2022-01-19 13:26:16,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 13:26:16,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:26:16,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:26:16,955 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:26:16,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 13:26:17,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 13:26:17,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:26:17,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 13:26:17,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:26:18,482 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 13:26:18,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:27:03,357 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 13:27:03,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971310773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:27:03,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:27:03,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 37 [2022-01-19 13:27:03,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508707500] [2022-01-19 13:27:03,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:27:03,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 13:27:03,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:27:03,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 13:27:03,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 13:27:03,360 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 13:27:03,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 278 transitions, 2731 flow. Second operand has 37 states, 37 states have (on average 48.7027027027027) internal successors, (1802), 37 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:27:03,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:27:03,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 13:27:03,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:27:14,577 INFO L129 PetriNetUnfolder]: 477/1620 cut-off events. [2022-01-19 13:27:14,577 INFO L130 PetriNetUnfolder]: For 7123/7123 co-relation queries the response was YES. [2022-01-19 13:27:14,587 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6709 conditions, 1620 events. 477/1620 cut-off events. For 7123/7123 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13032 event pairs, 53 based on Foata normal form. 2/1616 useless extension candidates. Maximal degree in co-relation 6659. Up to 324 conditions per place. [2022-01-19 13:27:14,595 INFO L132 encePairwiseOnDemand]: 58/80 looper letters, 168 selfloop transitions, 262 changer transitions 35/502 dead transitions. [2022-01-19 13:27:14,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 502 transitions, 5571 flow [2022-01-19 13:27:14,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-19 13:27:14,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-01-19 13:27:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3526 transitions. [2022-01-19 13:27:14,601 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.638768115942029 [2022-01-19 13:27:14,601 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3526 transitions. [2022-01-19 13:27:14,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3526 transitions. [2022-01-19 13:27:14,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:27:14,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3526 transitions. [2022-01-19 13:27:14,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 51.10144927536232) internal successors, (3526), 69 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:27:14,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 80.0) internal successors, (5600), 70 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:27:14,616 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 80.0) internal successors, (5600), 70 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:27:14,616 INFO L186 Difference]: Start difference. First operand has 199 places, 278 transitions, 2731 flow. Second operand 69 states and 3526 transitions. [2022-01-19 13:27:14,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 502 transitions, 5571 flow [2022-01-19 13:27:14,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 502 transitions, 5374 flow, removed 84 selfloop flow, removed 9 redundant places. [2022-01-19 13:27:14,676 INFO L242 Difference]: Finished difference. Result has 285 places, 370 transitions, 4556 flow [2022-01-19 13:27:14,679 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2620, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=4556, PETRI_PLACES=285, PETRI_TRANSITIONS=370} [2022-01-19 13:27:14,681 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 214 predicate places. [2022-01-19 13:27:14,681 INFO L470 AbstractCegarLoop]: Abstraction has has 285 places, 370 transitions, 4556 flow [2022-01-19 13:27:14,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 48.7027027027027) internal successors, (1802), 37 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:27:14,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:27:14,682 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:27:14,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 13:27:14,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-19 13:27:14,899 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:27:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:27:14,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1238501907, now seen corresponding path program 3 times [2022-01-19 13:27:14,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:27:14,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033657658] [2022-01-19 13:27:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:27:14,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:27:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:27:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 13:27:15,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:27:15,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033657658] [2022-01-19 13:27:15,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033657658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:27:15,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914772519] [2022-01-19 13:27:15,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 13:27:15,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:27:15,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:27:15,600 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:27:15,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 13:27:15,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 13:27:15,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:27:15,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 13:27:15,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:27:22,714 WARN L228 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 4489 DAG size of output: 2771 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-19 13:28:46,366 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 13:28:46,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:29:35,835 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 13:29:35,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914772519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:29:35,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:29:35,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-01-19 13:29:35,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222451439] [2022-01-19 13:29:35,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:29:35,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 13:29:35,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:29:35,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 13:29:35,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 13:29:35,839 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 13:29:35,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 370 transitions, 4556 flow. Second operand has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:29:35,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:29:35,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 13:29:35,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:29:50,328 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 13:29:51,886 INFO L129 PetriNetUnfolder]: 606/1924 cut-off events. [2022-01-19 13:29:51,887 INFO L130 PetriNetUnfolder]: For 15620/15620 co-relation queries the response was YES. [2022-01-19 13:29:51,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9990 conditions, 1924 events. 606/1924 cut-off events. For 15620/15620 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15709 event pairs, 43 based on Foata normal form. 1/1921 useless extension candidates. Maximal degree in co-relation 9913. Up to 420 conditions per place. [2022-01-19 13:29:51,919 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 161 selfloop transitions, 408 changer transitions 25/631 dead transitions. [2022-01-19 13:29:51,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 631 transitions, 8612 flow [2022-01-19 13:29:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-19 13:29:51,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2022-01-19 13:29:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 4985 transitions. [2022-01-19 13:29:51,926 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6358418367346939 [2022-01-19 13:29:51,927 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 4985 transitions. [2022-01-19 13:29:51,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 4985 transitions. [2022-01-19 13:29:51,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:29:51,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 4985 transitions. [2022-01-19 13:29:51,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 50.86734693877551) internal successors, (4985), 98 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:29:51,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 80.0) internal successors, (7920), 99 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:29:51,949 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 80.0) internal successors, (7920), 99 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:29:51,950 INFO L186 Difference]: Start difference. First operand has 285 places, 370 transitions, 4556 flow. Second operand 98 states and 4985 transitions. [2022-01-19 13:29:51,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 631 transitions, 8612 flow [2022-01-19 13:29:52,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 631 transitions, 7923 flow, removed 183 selfloop flow, removed 27 redundant places. [2022-01-19 13:29:52,070 INFO L242 Difference]: Finished difference. Result has 367 places, 501 transitions, 6672 flow [2022-01-19 13:29:52,071 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=4052, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=6672, PETRI_PLACES=367, PETRI_TRANSITIONS=501} [2022-01-19 13:29:52,071 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 296 predicate places. [2022-01-19 13:29:52,072 INFO L470 AbstractCegarLoop]: Abstraction has has 367 places, 501 transitions, 6672 flow [2022-01-19 13:29:52,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:29:52,073 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:29:52,073 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:29:52,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 13:29:52,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:29:52,291 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:29:52,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:29:52,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1183008459, now seen corresponding path program 4 times [2022-01-19 13:29:52,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:29:52,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37081161] [2022-01-19 13:29:52,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:29:52,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:29:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:29:52,954 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 13:29:52,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:29:52,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37081161] [2022-01-19 13:29:52,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37081161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:29:52,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332047641] [2022-01-19 13:29:52,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 13:29:52,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:29:52,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:29:52,956 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:29:52,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 13:29:53,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 13:29:53,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:29:53,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 13:29:53,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:30:00,023 WARN L228 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 4489 DAG size of output: 2771 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-19 13:31:34,223 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 13:31:34,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:32:24,291 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 13:32:24,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332047641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:32:24,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:32:24,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-01-19 13:32:24,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559669296] [2022-01-19 13:32:24,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:32:24,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 13:32:24,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:32:24,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 13:32:24,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 13:32:24,293 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 13:32:24,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 501 transitions, 6672 flow. Second operand has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:32:24,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:32:24,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 13:32:24,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:32:58,624 INFO L129 PetriNetUnfolder]: 913/2845 cut-off events. [2022-01-19 13:32:58,624 INFO L130 PetriNetUnfolder]: For 36149/36149 co-relation queries the response was YES. [2022-01-19 13:32:58,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17141 conditions, 2845 events. 913/2845 cut-off events. For 36149/36149 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24931 event pairs, 39 based on Foata normal form. 3/2845 useless extension candidates. Maximal degree in co-relation 17052. Up to 483 conditions per place. [2022-01-19 13:32:58,671 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 270 selfloop transitions, 781 changer transitions 35/1123 dead transitions. [2022-01-19 13:32:58,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 1123 transitions, 17689 flow [2022-01-19 13:32:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-01-19 13:32:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2022-01-19 13:32:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 8847 transitions. [2022-01-19 13:32:58,681 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6392341040462428 [2022-01-19 13:32:58,681 INFO L72 ComplementDD]: Start complementDD. Operand 173 states and 8847 transitions. [2022-01-19 13:32:58,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 173 states and 8847 transitions. [2022-01-19 13:32:58,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:32:58,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 173 states and 8847 transitions. [2022-01-19 13:32:58,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 174 states, 173 states have (on average 51.138728323699425) internal successors, (8847), 173 states have internal predecessors, (8847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:32:58,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 174 states, 174 states have (on average 80.0) internal successors, (13920), 174 states have internal predecessors, (13920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:32:58,715 INFO L81 ComplementDD]: Finished complementDD. Result has 174 states, 174 states have (on average 80.0) internal successors, (13920), 174 states have internal predecessors, (13920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:32:58,716 INFO L186 Difference]: Start difference. First operand has 367 places, 501 transitions, 6672 flow. Second operand 173 states and 8847 transitions. [2022-01-19 13:32:58,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 1123 transitions, 17689 flow [2022-01-19 13:32:58,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 1123 transitions, 16181 flow, removed 375 selfloop flow, removed 42 redundant places. [2022-01-19 13:32:58,928 INFO L242 Difference]: Finished difference. Result has 536 places, 894 transitions, 14244 flow [2022-01-19 13:32:58,929 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=5875, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=173, PETRI_FLOW=14244, PETRI_PLACES=536, PETRI_TRANSITIONS=894} [2022-01-19 13:32:58,929 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 465 predicate places. [2022-01-19 13:32:58,929 INFO L470 AbstractCegarLoop]: Abstraction has has 536 places, 894 transitions, 14244 flow [2022-01-19 13:32:58,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:32:58,930 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:32:58,930 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:32:58,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 13:32:59,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 13:32:59,144 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:32:59,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:32:59,144 INFO L85 PathProgramCache]: Analyzing trace with hash 458985453, now seen corresponding path program 5 times [2022-01-19 13:32:59,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:32:59,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855350445] [2022-01-19 13:32:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:32:59,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:32:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:32:59,769 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 13:32:59,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:32:59,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855350445] [2022-01-19 13:32:59,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855350445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:32:59,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264640587] [2022-01-19 13:32:59,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 13:32:59,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:32:59,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:32:59,776 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:32:59,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 13:32:59,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 13:32:59,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:32:59,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 13:32:59,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:33:06,748 WARN L228 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 4489 DAG size of output: 2771 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-19 13:34:45,559 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 13:34:45,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:35:28,869 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 13:35:28,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264640587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:35:28,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:35:28,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-01-19 13:35:28,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193445641] [2022-01-19 13:35:28,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:35:28,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 13:35:28,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:35:28,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 13:35:28,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 13:35:28,872 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 13:35:28,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 894 transitions, 14244 flow. Second operand has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:35:28,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:35:28,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 13:35:28,874 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:35:37,449 INFO L129 PetriNetUnfolder]: 907/2777 cut-off events. [2022-01-19 13:35:37,449 INFO L130 PetriNetUnfolder]: For 55128/55128 co-relation queries the response was YES. [2022-01-19 13:35:37,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19639 conditions, 2777 events. 907/2777 cut-off events. For 55128/55128 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 24145 event pairs, 64 based on Foata normal form. 1/2773 useless extension candidates. Maximal degree in co-relation 19514. Up to 892 conditions per place. [2022-01-19 13:35:37,496 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 349 selfloop transitions, 604 changer transitions 10/1000 dead transitions. [2022-01-19 13:35:37,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 1000 transitions, 17657 flow [2022-01-19 13:35:37,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-19 13:35:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-01-19 13:35:37,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 3820 transitions. [2022-01-19 13:35:37,510 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2022-01-19 13:35:37,510 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 3820 transitions. [2022-01-19 13:35:37,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 3820 transitions. [2022-01-19 13:35:37,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:35:37,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 3820 transitions. [2022-01-19 13:35:37,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 50.93333333333333) internal successors, (3820), 75 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:35:37,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 80.0) internal successors, (6080), 76 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:35:37,530 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 80.0) internal successors, (6080), 76 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:35:37,530 INFO L186 Difference]: Start difference. First operand has 536 places, 894 transitions, 14244 flow. Second operand 75 states and 3820 transitions. [2022-01-19 13:35:37,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 1000 transitions, 17657 flow [2022-01-19 13:35:38,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 1000 transitions, 14850 flow, removed 1148 selfloop flow, removed 71 redundant places. [2022-01-19 13:35:38,124 INFO L242 Difference]: Finished difference. Result has 534 places, 902 transitions, 13149 flow [2022-01-19 13:35:38,125 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=11798, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=13149, PETRI_PLACES=534, PETRI_TRANSITIONS=902} [2022-01-19 13:35:38,126 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 463 predicate places. [2022-01-19 13:35:38,126 INFO L470 AbstractCegarLoop]: Abstraction has has 534 places, 902 transitions, 13149 flow [2022-01-19 13:35:38,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:35:38,126 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:35:38,126 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:35:38,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 13:35:38,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 13:35:38,330 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:35:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:35:38,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1766559223, now seen corresponding path program 6 times [2022-01-19 13:35:38,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:35:38,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880530249] [2022-01-19 13:35:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:35:38,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:35:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:35:39,055 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 13:35:39,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:35:39,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880530249] [2022-01-19 13:35:39,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880530249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:35:39,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946594020] [2022-01-19 13:35:39,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 13:35:39,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:35:39,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:35:39,060 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:35:39,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 13:35:39,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 13:35:39,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:35:39,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 13:35:39,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:35:40,020 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 13:35:40,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:36:28,187 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 13:36:28,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946594020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:36:28,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:36:28,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-01-19 13:36:28,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702547320] [2022-01-19 13:36:28,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:36:28,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 13:36:28,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:36:28,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 13:36:28,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 13:36:28,189 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 13:36:28,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 902 transitions, 13149 flow. Second operand has 38 states, 38 states have (on average 48.6578947368421) internal successors, (1849), 38 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:36:28,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:36:28,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 13:36:28,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:36:50,916 INFO L129 PetriNetUnfolder]: 1074/3186 cut-off events. [2022-01-19 13:36:50,916 INFO L130 PetriNetUnfolder]: For 53529/53529 co-relation queries the response was YES. [2022-01-19 13:36:50,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21114 conditions, 3186 events. 1074/3186 cut-off events. For 53529/53529 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 28074 event pairs, 44 based on Foata normal form. 4/3186 useless extension candidates. Maximal degree in co-relation 21006. Up to 604 conditions per place. [2022-01-19 13:36:50,963 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 318 selfloop transitions, 905 changer transitions 28/1288 dead transitions. [2022-01-19 13:36:50,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 1288 transitions, 21596 flow [2022-01-19 13:36:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-19 13:36:50,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2022-01-19 13:36:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 6368 transitions. [2022-01-19 13:36:50,973 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6419354838709678 [2022-01-19 13:36:50,973 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 6368 transitions. [2022-01-19 13:36:50,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 6368 transitions. [2022-01-19 13:36:50,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:36:50,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 6368 transitions. [2022-01-19 13:36:50,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 51.354838709677416) internal successors, (6368), 124 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:36:50,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 80.0) internal successors, (10000), 125 states have internal predecessors, (10000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:36:50,992 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 80.0) internal successors, (10000), 125 states have internal predecessors, (10000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:36:50,992 INFO L186 Difference]: Start difference. First operand has 534 places, 902 transitions, 13149 flow. Second operand 124 states and 6368 transitions. [2022-01-19 13:36:50,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 1288 transitions, 21596 flow [2022-01-19 13:36:51,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 1288 transitions, 20822 flow, removed 130 selfloop flow, removed 57 redundant places. [2022-01-19 13:36:51,481 INFO L242 Difference]: Finished difference. Result has 631 places, 1101 transitions, 18708 flow [2022-01-19 13:36:51,482 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=12645, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=712, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=18708, PETRI_PLACES=631, PETRI_TRANSITIONS=1101} [2022-01-19 13:36:51,482 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 560 predicate places. [2022-01-19 13:36:51,483 INFO L470 AbstractCegarLoop]: Abstraction has has 631 places, 1101 transitions, 18708 flow [2022-01-19 13:36:51,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.6578947368421) internal successors, (1849), 38 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:36:51,483 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:36:51,483 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:36:51,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 13:36:51,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 13:36:51,699 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:36:51,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:36:51,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2053780671, now seen corresponding path program 7 times [2022-01-19 13:36:51,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:36:51,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331523964] [2022-01-19 13:36:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:36:51,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:36:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:36:52,388 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 13:36:52,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:36:52,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331523964] [2022-01-19 13:36:52,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331523964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:36:52,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647507870] [2022-01-19 13:36:52,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 13:36:52,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:36:52,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:36:52,390 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:36:52,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 13:36:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:36:52,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 13:36:52,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:36:53,312 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 13:36:53,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 13:37:44,922 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 13:37:44,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647507870] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 13:37:44,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 13:37:44,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-01-19 13:37:44,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346398473] [2022-01-19 13:37:44,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 13:37:44,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 13:37:44,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 13:37:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 13:37:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 13:37:44,925 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-01-19 13:37:44,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 1101 transitions, 18708 flow. Second operand has 38 states, 38 states have (on average 48.6578947368421) internal successors, (1849), 38 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:37:44,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 13:37:44,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-01-19 13:37:44,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 13:37:52,839 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 13:38:07,802 INFO L129 PetriNetUnfolder]: 1276/3881 cut-off events. [2022-01-19 13:38:07,802 INFO L130 PetriNetUnfolder]: For 80964/80964 co-relation queries the response was YES. [2022-01-19 13:38:07,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28679 conditions, 3881 events. 1276/3881 cut-off events. For 80964/80964 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 36081 event pairs, 120 based on Foata normal form. 2/3867 useless extension candidates. Maximal degree in co-relation 28541. Up to 1556 conditions per place. [2022-01-19 13:38:07,871 INFO L132 encePairwiseOnDemand]: 58/80 looper letters, 579 selfloop transitions, 926 changer transitions 14/1556 dead transitions. [2022-01-19 13:38:07,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 699 places, 1556 transitions, 30139 flow [2022-01-19 13:38:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-19 13:38:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-01-19 13:38:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4107 transitions. [2022-01-19 13:38:07,875 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6337962962962963 [2022-01-19 13:38:07,875 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4107 transitions. [2022-01-19 13:38:07,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4107 transitions. [2022-01-19 13:38:07,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 13:38:07,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4107 transitions. [2022-01-19 13:38:07,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 50.7037037037037) internal successors, (4107), 81 states have internal predecessors, (4107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:38:07,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 80.0) internal successors, (6560), 82 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:38:07,887 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 80.0) internal successors, (6560), 82 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:38:07,887 INFO L186 Difference]: Start difference. First operand has 631 places, 1101 transitions, 18708 flow. Second operand 81 states and 4107 transitions. [2022-01-19 13:38:07,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 699 places, 1556 transitions, 30139 flow [2022-01-19 13:38:08,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 1556 transitions, 29158 flow, removed 347 selfloop flow, removed 49 redundant places. [2022-01-19 13:38:08,839 INFO L242 Difference]: Finished difference. Result has 675 places, 1411 transitions, 28139 flow [2022-01-19 13:38:08,840 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=18117, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=638, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=28139, PETRI_PLACES=675, PETRI_TRANSITIONS=1411} [2022-01-19 13:38:08,840 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 604 predicate places. [2022-01-19 13:38:08,841 INFO L470 AbstractCegarLoop]: Abstraction has has 675 places, 1411 transitions, 28139 flow [2022-01-19 13:38:08,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.6578947368421) internal successors, (1849), 38 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 13:38:08,841 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 13:38:08,841 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 13:38:08,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 13:38:09,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 13:38:09,041 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 13:38:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 13:38:09,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1767475389, now seen corresponding path program 8 times [2022-01-19 13:38:09,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 13:38:09,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198320156] [2022-01-19 13:38:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 13:38:09,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 13:38:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 13:38:09,678 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 13:38:09,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 13:38:09,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198320156] [2022-01-19 13:38:09,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198320156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 13:38:09,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879644519] [2022-01-19 13:38:09,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 13:38:09,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:38:09,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 13:38:09,680 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 13:38:09,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 13:38:09,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 13:38:09,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 13:38:09,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 13:38:09,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 13:38:11,034 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 13:38:11,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-01-19 13:39:13,649 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 13:39:13,650 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 13:39:14,020 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-19 13:39:14,022 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 13:39:14,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 13:39:14,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 13:39:14,222 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 66 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 33 for 3ms.. [2022-01-19 13:39:14,224 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 13:39:14,224 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 13:39:14,227 INFO L732 BasicCegarLoop]: Path program histogram: [8, 3, 3, 1, 1] [2022-01-19 13:39:14,228 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 13:39:14,228 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 13:39:14,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 01:39:14 BasicIcfg [2022-01-19 13:39:14,231 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 13:39:14,231 INFO L158 Benchmark]: Toolchain (without parser) took 849712.48ms. Allocated memory was 341.8MB in the beginning and 1.4GB in the end (delta: 1.0GB). Free memory was 286.9MB in the beginning and 1.2GB in the end (delta: -917.2MB). Peak memory consumption was 889.4MB. Max. memory is 16.0GB. [2022-01-19 13:39:14,231 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 341.8MB. Free memory is still 304.0MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 13:39:14,231 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.23ms. Allocated memory was 341.8MB in the beginning and 411.0MB in the end (delta: 69.2MB). Free memory was 286.8MB in the beginning and 382.8MB in the end (delta: -96.0MB). Peak memory consumption was 6.8MB. Max. memory is 16.0GB. [2022-01-19 13:39:14,232 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.66ms. Allocated memory is still 411.0MB. Free memory was 382.8MB in the beginning and 381.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 13:39:14,232 INFO L158 Benchmark]: Boogie Preprocessor took 16.93ms. Allocated memory is still 411.0MB. Free memory was 381.7MB in the beginning and 380.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 13:39:14,232 INFO L158 Benchmark]: RCFGBuilder took 326.93ms. Allocated memory is still 411.0MB. Free memory was 380.6MB in the beginning and 367.0MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-19 13:39:14,232 INFO L158 Benchmark]: TraceAbstraction took 849038.47ms. Allocated memory was 411.0MB in the beginning and 1.4GB in the end (delta: 968.9MB). Free memory was 367.0MB in the beginning and 1.2GB in the end (delta: -837.2MB). Peak memory consumption was 902.4MB. Max. memory is 16.0GB. [2022-01-19 13:39:14,234 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 341.8MB. Free memory is still 304.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 292.23ms. Allocated memory was 341.8MB in the beginning and 411.0MB in the end (delta: 69.2MB). Free memory was 286.8MB in the beginning and 382.8MB in the end (delta: -96.0MB). Peak memory consumption was 6.8MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.66ms. Allocated memory is still 411.0MB. Free memory was 382.8MB in the beginning and 381.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 16.93ms. Allocated memory is still 411.0MB. Free memory was 381.7MB in the beginning and 380.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 326.93ms. Allocated memory is still 411.0MB. Free memory was 380.6MB in the beginning and 367.0MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 849038.47ms. Allocated memory was 411.0MB in the beginning and 1.4GB in the end (delta: 968.9MB). Free memory was 367.0MB in the beginning and 1.2GB in the end (delta: -837.2MB). Peak memory consumption was 902.4MB. 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 analyzing trace of length 66 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 33 for 3ms.. - 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 analyzing trace of length 66 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 33 for 3ms.. - 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 analyzing trace of length 66 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 33 for 3ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 96 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: 848.9s, OverallIterations: 16, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 127.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 4121 SdHoareTripleChecker+Valid, 41.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4121 mSDsluCounter, 5411 SdHoareTripleChecker+Invalid, 39.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7586 mSDsCounter, 1285 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15695 IncrementalHoareTripleChecker+Invalid, 16982 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1285 mSolverCounterUnsat, 483 mSDtfsCounter, 15695 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2395 GetRequests, 1408 SyntacticMatches, 50 SemanticMatches, 937 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37593 ImplicationChecksByTransitivity, 100.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28139occurred in iteration=15, InterpolantAutomatonStates: 764, 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, 652.1s InterpolantComputationTime, 1740 NumberOfCodeBlocks, 1740 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 2514 ConstructedInterpolants, 0 QuantifiedInterpolants, 44200 SizeOfPredicates, 137 NumberOfNonLiveVariables, 1915 ConjunctsInSsa, 298 ConjunctsInUnsatCore, 41 InterpolantComputations, 4 PerfectInterpolantSequences, 2/60 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