/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/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 10:21:51,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 10:21:51,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 10:21:51,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 10:21:51,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 10:21:51,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 10:21:51,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 10:21:51,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 10:21:51,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 10:21:51,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 10:21:51,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 10:21:51,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 10:21:51,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 10:21:51,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 10:21:51,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 10:21:51,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 10:21:51,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 10:21:51,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 10:21:51,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 10:21:51,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 10:21:51,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 10:21:51,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 10:21:51,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 10:21:51,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 10:21:51,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 10:21:51,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 10:21:51,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 10:21:51,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 10:21:51,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 10:21:51,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 10:21:51,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 10:21:51,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 10:21:51,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 10:21:51,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 10:21:51,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 10:21:51,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 10:21:51,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 10:21:51,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 10:21:51,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 10:21:51,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 10:21:51,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 10:21:51,720 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 10:21:51,743 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 10:21:51,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 10:21:51,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 10:21:51,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 10:21:51,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 10:21:51,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 10:21:51,744 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 10:21:51,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 10:21:51,744 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 10:21:51,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 10:21:51,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 10:21:51,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 10:21:51,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 10:21:51,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 10:21:51,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 10:21:51,745 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 10:21:51,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 10:21:51,745 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 10:21:51,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 10:21:51,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 10:21:51,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 10:21:51,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 10:21:51,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 10:21:51,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 10:21:51,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 10:21:51,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 10:21:51,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 10:21:51,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 10:21:51,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 10:21:51,746 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 10:21:51,746 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 10:21:51,747 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=AFTER [2022-01-19 10:21:51,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 10:21:51,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 10:21:51,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 10:21:51,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 10:21:51,961 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 10:21:51,965 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 10:21:51,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2022-01-19 10:21:52,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d56936eca/f8447909305f43d0963f09ca7da2e407/FLAGcb931180c [2022-01-19 10:21:52,487 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 10:21:52,487 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2022-01-19 10:21:52,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d56936eca/f8447909305f43d0963f09ca7da2e407/FLAGcb931180c [2022-01-19 10:21:52,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d56936eca/f8447909305f43d0963f09ca7da2e407 [2022-01-19 10:21:52,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 10:21:52,519 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 10:21:52,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 10:21:52,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 10:21:52,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 10:21:52,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 10:21:52" (1/1) ... [2022-01-19 10:21:52,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@171eb386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 10:21:52, skipping insertion in model container [2022-01-19 10:21:52,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 10:21:52" (1/1) ... [2022-01-19 10:21:52,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 10:21:52,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 10:21:52,782 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i[30952,30965] [2022-01-19 10:21:52,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 10:21:52,789 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 10:21:52,832 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i[30952,30965] [2022-01-19 10:21:52,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 10:21:52,859 INFO L208 MainTranslator]: Completed translation [2022-01-19 10:21:52,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 10:21:52 WrapperNode [2022-01-19 10:21:52,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 10:21:52,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 10:21:52,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 10:21:52,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 10:21:52,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 10:21:52" (1/1) ... [2022-01-19 10:21:52,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 10:21:52" (1/1) ... [2022-01-19 10:21:52,899 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-01-19 10:21:52,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 10:21:52,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 10:21:52,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 10:21:52,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 10:21:52,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 10:21:52" (1/1) ... [2022-01-19 10:21:52,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 10:21:52" (1/1) ... [2022-01-19 10:21:52,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 10:21:52" (1/1) ... [2022-01-19 10:21:52,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 10:21:52" (1/1) ... [2022-01-19 10:21:52,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 10:21:52" (1/1) ... [2022-01-19 10:21:52,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 10:21:52" (1/1) ... [2022-01-19 10:21:52,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 10:21:52" (1/1) ... [2022-01-19 10:21:52,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 10:21:52,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 10:21:52,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 10:21:52,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 10:21:52,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 10:21:52" (1/1) ... [2022-01-19 10:21:52,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 10:21:52,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 10:21:52,964 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 10:21:52,972 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 10:21:52,990 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-01-19 10:21:52,990 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-01-19 10:21:52,990 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-01-19 10:21:52,991 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-01-19 10:21:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 10:21:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 10:21:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 10:21:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 10:21:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 10:21:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 10:21:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 10:21:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 10:21:52,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 10:21:52,993 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 10:21:53,053 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 10:21:53,054 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 10:21:53,173 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 10:21:53,177 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 10:21:53,177 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 10:21:53,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 10:21:53 BoogieIcfgContainer [2022-01-19 10:21:53,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 10:21:53,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 10:21:53,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 10:21:53,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 10:21:53,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 10:21:52" (1/3) ... [2022-01-19 10:21:53,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d9b3785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 10:21:53, skipping insertion in model container [2022-01-19 10:21:53,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 10:21:52" (2/3) ... [2022-01-19 10:21:53,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d9b3785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 10:21:53, skipping insertion in model container [2022-01-19 10:21:53,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 10:21:53" (3/3) ... [2022-01-19 10:21:53,183 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2022-01-19 10:21:53,186 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 10:21:53,186 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 10:21:53,186 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 10:21:53,206 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,206 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,206 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,206 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,206 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,207 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,207 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,207 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,207 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,207 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,207 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,208 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,208 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,208 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,208 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,208 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,209 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,209 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,209 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,209 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,209 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,210 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,210 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,210 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,210 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,210 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,210 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,211 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,211 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,211 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,211 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,211 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,211 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,211 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,212 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,212 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,212 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,212 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,212 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,212 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,213 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,213 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,213 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,213 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,214 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,214 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,214 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,214 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,214 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,214 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,215 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,215 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,215 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,215 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,215 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,215 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,217 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,217 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,217 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,218 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,218 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,218 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,220 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,220 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,220 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,220 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,220 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,220 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 10:21:53,221 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-19 10:21:53,262 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 10:21:53,266 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 10:21:53,267 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 10:21:53,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-01-19 10:21:53,314 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-01-19 10:21:53,314 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 10:21:53,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-01-19 10:21:53,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-01-19 10:21:53,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-01-19 10:21:53,345 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2022-01-19 10:21:53,345 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 10:21:53,345 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 10:21:53,346 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] [2022-01-19 10:21:53,346 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 10:21:53,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 10:21:53,351 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-01-19 10:21:53,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 10:21:53,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832801078] [2022-01-19 10:21:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:21:53,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 10:21:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 10:21:53,683 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 10:21:53,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 10:21:53,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832801078] [2022-01-19 10:21:53,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832801078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 10:21:53,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 10:21:53,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 10:21:53,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006613579] [2022-01-19 10:21:53,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 10:21:53,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 10:21:53,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 10:21:53,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 10:21:53,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 10:21:53,723 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 10:21:53,732 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:53,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 10:21:53,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 10:21:53,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 10:21:53,852 INFO L129 PetriNetUnfolder]: 42/210 cut-off events. [2022-01-19 10:21:53,852 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 10:21:53,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 210 events. 42/210 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 816 event pairs, 3 based on Foata normal form. 46/240 useless extension candidates. Maximal degree in co-relation 257. Up to 28 conditions per place. [2022-01-19 10:21:53,855 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-01-19 10:21:53,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-01-19 10:21:53,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 10:21:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 10:21:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-01-19 10:21:53,866 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-01-19 10:21:53,866 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-01-19 10:21:53,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-01-19 10:21:53,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 10:21:53,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-01-19 10:21:53,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:53,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:53,877 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:53,878 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-01-19 10:21:53,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-01-19 10:21:53,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-19 10:21:53,883 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-01-19 10:21:53,884 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-01-19 10:21:53,886 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-01-19 10:21:53,886 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-01-19 10:21:53,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:53,887 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 10:21:53,887 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] [2022-01-19 10:21:53,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 10:21:53,887 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 10:21:53,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 10:21:53,888 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-01-19 10:21:53,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 10:21:53,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335909465] [2022-01-19 10:21:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:21:53,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 10:21:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 10:21:53,966 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 10:21:53,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 10:21:53,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335909465] [2022-01-19 10:21:53,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335909465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 10:21:53,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 10:21:53,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 10:21:53,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550854679] [2022-01-19 10:21:53,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 10:21:53,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 10:21:53,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 10:21:53,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 10:21:53,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-19 10:21:53,970 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 10:21:53,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:53,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 10:21:53,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 10:21:53,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 10:21:54,038 INFO L129 PetriNetUnfolder]: 46/217 cut-off events. [2022-01-19 10:21:54,039 INFO L130 PetriNetUnfolder]: For 109/112 co-relation queries the response was YES. [2022-01-19 10:21:54,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 217 events. 46/217 cut-off events. For 109/112 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 853 event pairs, 0 based on Foata normal form. 3/204 useless extension candidates. Maximal degree in co-relation 376. Up to 35 conditions per place. [2022-01-19 10:21:54,041 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-01-19 10:21:54,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-01-19 10:21:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 10:21:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 10:21:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-01-19 10:21:54,042 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-01-19 10:21:54,042 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-01-19 10:21:54,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-01-19 10:21:54,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 10:21:54,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-01-19 10:21:54,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,045 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,045 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-01-19 10:21:54,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-01-19 10:21:54,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 10:21:54,050 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-01-19 10:21:54,050 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-01-19 10:21:54,050 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-01-19 10:21:54,050 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-01-19 10:21:54,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,051 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 10:21:54,051 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] [2022-01-19 10:21:54,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 10:21:54,051 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 10:21:54,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 10:21:54,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-01-19 10:21:54,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 10:21:54,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072501703] [2022-01-19 10:21:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:21:54,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 10:21:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 10:21:54,127 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 10:21:54,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 10:21:54,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072501703] [2022-01-19 10:21:54,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072501703] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 10:21:54,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 10:21:54,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 10:21:54,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416847937] [2022-01-19 10:21:54,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 10:21:54,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 10:21:54,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 10:21:54,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 10:21:54,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 10:21:54,130 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 10:21:54,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 10:21:54,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 10:21:54,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 10:21:54,207 INFO L129 PetriNetUnfolder]: 37/196 cut-off events. [2022-01-19 10:21:54,207 INFO L130 PetriNetUnfolder]: For 258/265 co-relation queries the response was YES. [2022-01-19 10:21:54,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 196 events. 37/196 cut-off events. For 258/265 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 651 event pairs, 0 based on Foata normal form. 10/188 useless extension candidates. Maximal degree in co-relation 362. Up to 35 conditions per place. [2022-01-19 10:21:54,210 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-01-19 10:21:54,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-01-19 10:21:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 10:21:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 10:21:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-01-19 10:21:54,212 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-01-19 10:21:54,212 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-01-19 10:21:54,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-01-19 10:21:54,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 10:21:54,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-01-19 10:21:54,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,216 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,217 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-01-19 10:21:54,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-01-19 10:21:54,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-01-19 10:21:54,221 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-01-19 10:21:54,221 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2022-01-19 10:21:54,222 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-01-19 10:21:54,222 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-01-19 10:21:54,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,223 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 10:21:54,223 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] [2022-01-19 10:21:54,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 10:21:54,223 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 10:21:54,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 10:21:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-01-19 10:21:54,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 10:21:54,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291123162] [2022-01-19 10:21:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:21:54,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 10:21:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 10:21:54,313 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 10:21:54,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 10:21:54,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291123162] [2022-01-19 10:21:54,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291123162] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 10:21:54,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 10:21:54,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 10:21:54,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201333051] [2022-01-19 10:21:54,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 10:21:54,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 10:21:54,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 10:21:54,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 10:21:54,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-19 10:21:54,316 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 10:21:54,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 10:21:54,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 10:21:54,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 10:21:54,406 INFO L129 PetriNetUnfolder]: 30/185 cut-off events. [2022-01-19 10:21:54,406 INFO L130 PetriNetUnfolder]: For 246/265 co-relation queries the response was YES. [2022-01-19 10:21:54,407 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 185 events. 30/185 cut-off events. For 246/265 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 614 event pairs, 0 based on Foata normal form. 16/184 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2022-01-19 10:21:54,408 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2022-01-19 10:21:54,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 487 flow [2022-01-19 10:21:54,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 10:21:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 10:21:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2022-01-19 10:21:54,409 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-01-19 10:21:54,410 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2022-01-19 10:21:54,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2022-01-19 10:21:54,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 10:21:54,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2022-01-19 10:21:54,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,412 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,412 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 9 states and 524 transitions. [2022-01-19 10:21:54,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 487 flow [2022-01-19 10:21:54,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 467 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-01-19 10:21:54,418 INFO L242 Difference]: Finished difference. Result has 93 places, 73 transitions, 332 flow [2022-01-19 10:21:54,418 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2022-01-19 10:21:54,419 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2022-01-19 10:21:54,419 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 332 flow [2022-01-19 10:21:54,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,419 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 10:21:54,419 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] [2022-01-19 10:21:54,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 10:21:54,420 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 10:21:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 10:21:54,421 INFO L85 PathProgramCache]: Analyzing trace with hash 704825237, now seen corresponding path program 1 times [2022-01-19 10:21:54,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 10:21:54,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828171949] [2022-01-19 10:21:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:21:54,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 10:21:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 10:21:54,517 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 10:21:54,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 10:21:54,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828171949] [2022-01-19 10:21:54,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828171949] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 10:21:54,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 10:21:54,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-19 10:21:54,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239347590] [2022-01-19 10:21:54,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 10:21:54,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 10:21:54,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 10:21:54,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 10:21:54,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-19 10:21:54,519 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 10:21:54,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 10:21:54,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 10:21:54,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 10:21:54,616 INFO L129 PetriNetUnfolder]: 43/227 cut-off events. [2022-01-19 10:21:54,617 INFO L130 PetriNetUnfolder]: For 607/629 co-relation queries the response was YES. [2022-01-19 10:21:54,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 227 events. 43/227 cut-off events. For 607/629 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 792 event pairs, 1 based on Foata normal form. 15/221 useless extension candidates. Maximal degree in co-relation 528. Up to 50 conditions per place. [2022-01-19 10:21:54,618 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 23 selfloop transitions, 21 changer transitions 8/97 dead transitions. [2022-01-19 10:21:54,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 660 flow [2022-01-19 10:21:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-19 10:21:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-01-19 10:21:54,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2022-01-19 10:21:54,620 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-01-19 10:21:54,620 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2022-01-19 10:21:54,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2022-01-19 10:21:54,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 10:21:54,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2022-01-19 10:21:54,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,623 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,623 INFO L186 Difference]: Start difference. First operand has 93 places, 73 transitions, 332 flow. Second operand 11 states and 644 transitions. [2022-01-19 10:21:54,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 660 flow [2022-01-19 10:21:54,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 544 flow, removed 45 selfloop flow, removed 10 redundant places. [2022-01-19 10:21:54,626 INFO L242 Difference]: Finished difference. Result has 97 places, 79 transitions, 417 flow [2022-01-19 10:21:54,626 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=417, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2022-01-19 10:21:54,629 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 27 predicate places. [2022-01-19 10:21:54,629 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 417 flow [2022-01-19 10:21:54,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,629 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 10:21:54,629 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 10:21:54,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 10:21:54,630 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 10:21:54,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 10:21:54,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1426423327, now seen corresponding path program 2 times [2022-01-19 10:21:54,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 10:21:54,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102229210] [2022-01-19 10:21:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:21:54,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 10:21:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 10:21:54,705 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 10:21:54,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 10:21:54,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102229210] [2022-01-19 10:21:54,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102229210] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 10:21:54,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 10:21:54,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-19 10:21:54,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879531440] [2022-01-19 10:21:54,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 10:21:54,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 10:21:54,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 10:21:54,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 10:21:54,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-19 10:21:54,708 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 10:21:54,708 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 417 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,708 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 10:21:54,708 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 10:21:54,708 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 10:21:54,815 INFO L129 PetriNetUnfolder]: 36/209 cut-off events. [2022-01-19 10:21:54,816 INFO L130 PetriNetUnfolder]: For 768/801 co-relation queries the response was YES. [2022-01-19 10:21:54,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 209 events. 36/209 cut-off events. For 768/801 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 720 event pairs, 1 based on Foata normal form. 25/215 useless extension candidates. Maximal degree in co-relation 551. Up to 44 conditions per place. [2022-01-19 10:21:54,817 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 20 selfloop transitions, 21 changer transitions 11/97 dead transitions. [2022-01-19 10:21:54,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 97 transitions, 749 flow [2022-01-19 10:21:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-19 10:21:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-01-19 10:21:54,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2022-01-19 10:21:54,819 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-01-19 10:21:54,819 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2022-01-19 10:21:54,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2022-01-19 10:21:54,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 10:21:54,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2022-01-19 10:21:54,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,822 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,822 INFO L186 Difference]: Start difference. First operand has 97 places, 79 transitions, 417 flow. Second operand 11 states and 638 transitions. [2022-01-19 10:21:54,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 97 transitions, 749 flow [2022-01-19 10:21:54,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 693 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-01-19 10:21:54,825 INFO L242 Difference]: Finished difference. Result has 104 places, 80 transitions, 470 flow [2022-01-19 10:21:54,825 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=470, PETRI_PLACES=104, PETRI_TRANSITIONS=80} [2022-01-19 10:21:54,826 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-01-19 10:21:54,826 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 80 transitions, 470 flow [2022-01-19 10:21:54,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,826 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 10:21:54,826 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] [2022-01-19 10:21:54,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 10:21:54,826 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 10:21:54,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 10:21:54,827 INFO L85 PathProgramCache]: Analyzing trace with hash -949175033, now seen corresponding path program 3 times [2022-01-19 10:21:54,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 10:21:54,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763794313] [2022-01-19 10:21:54,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:21:54,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 10:21:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 10:21:54,878 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 10:21:54,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 10:21:54,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763794313] [2022-01-19 10:21:54,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763794313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 10:21:54,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 10:21:54,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-19 10:21:54,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873230635] [2022-01-19 10:21:54,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 10:21:54,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 10:21:54,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 10:21:54,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 10:21:54,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-19 10:21:54,880 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 10:21:54,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 80 transitions, 470 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 10:21:54,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 10:21:54,881 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 10:21:54,950 INFO L129 PetriNetUnfolder]: 37/218 cut-off events. [2022-01-19 10:21:54,951 INFO L130 PetriNetUnfolder]: For 941/976 co-relation queries the response was YES. [2022-01-19 10:21:54,951 INFO L84 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 218 events. 37/218 cut-off events. For 941/976 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 857 event pairs, 0 based on Foata normal form. 31/229 useless extension candidates. Maximal degree in co-relation 598. Up to 45 conditions per place. [2022-01-19 10:21:54,952 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 28 selfloop transitions, 16 changer transitions 5/94 dead transitions. [2022-01-19 10:21:54,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 94 transitions, 753 flow [2022-01-19 10:21:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 10:21:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 10:21:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 526 transitions. [2022-01-19 10:21:54,954 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.834920634920635 [2022-01-19 10:21:54,954 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 526 transitions. [2022-01-19 10:21:54,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 526 transitions. [2022-01-19 10:21:54,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 10:21:54,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 526 transitions. [2022-01-19 10:21:54,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.44444444444444) internal successors, (526), 9 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,956 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,956 INFO L186 Difference]: Start difference. First operand has 104 places, 80 transitions, 470 flow. Second operand 9 states and 526 transitions. [2022-01-19 10:21:54,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 94 transitions, 753 flow [2022-01-19 10:21:54,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 677 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-01-19 10:21:54,960 INFO L242 Difference]: Finished difference. Result has 104 places, 85 transitions, 532 flow [2022-01-19 10:21:54,960 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=532, PETRI_PLACES=104, PETRI_TRANSITIONS=85} [2022-01-19 10:21:54,961 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-01-19 10:21:54,961 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 85 transitions, 532 flow [2022-01-19 10:21:54,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:54,961 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 10:21:54,961 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 10:21:54,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 10:21:54,961 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 10:21:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 10:21:54,962 INFO L85 PathProgramCache]: Analyzing trace with hash -211553739, now seen corresponding path program 1 times [2022-01-19 10:21:54,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 10:21:54,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999142428] [2022-01-19 10:21:54,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:21:54,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 10:21:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 10:21:55,036 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 10:21:55,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 10:21:55,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999142428] [2022-01-19 10:21:55,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999142428] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 10:21:55,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936717383] [2022-01-19 10:21:55,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:21:55,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 10:21:55,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 10:21:55,044 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 10:21:55,046 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 10:21:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 10:21:55,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 10:21:55,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 10:21:55,241 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 10:21:55,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 10:21:55,402 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 10:21:55,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936717383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 10:21:55,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 10:21:55,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-19 10:21:55,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503910762] [2022-01-19 10:21:55,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 10:21:55,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 10:21:55,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 10:21:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 10:21:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-19 10:21:55,404 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 10:21:55,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 85 transitions, 532 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:55,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 10:21:55,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 10:21:55,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 10:21:55,637 INFO L129 PetriNetUnfolder]: 55/317 cut-off events. [2022-01-19 10:21:55,638 INFO L130 PetriNetUnfolder]: For 1269/1315 co-relation queries the response was YES. [2022-01-19 10:21:55,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 317 events. 55/317 cut-off events. For 1269/1315 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1292 event pairs, 1 based on Foata normal form. 34/320 useless extension candidates. Maximal degree in co-relation 885. Up to 67 conditions per place. [2022-01-19 10:21:55,640 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 27 selfloop transitions, 38 changer transitions 14/124 dead transitions. [2022-01-19 10:21:55,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 124 transitions, 1220 flow [2022-01-19 10:21:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-19 10:21:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-01-19 10:21:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2022-01-19 10:21:55,642 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2022-01-19 10:21:55,642 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2022-01-19 10:21:55,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2022-01-19 10:21:55,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 10:21:55,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2022-01-19 10:21:55,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:55,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:55,647 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:55,647 INFO L186 Difference]: Start difference. First operand has 104 places, 85 transitions, 532 flow. Second operand 20 states and 1159 transitions. [2022-01-19 10:21:55,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 124 transitions, 1220 flow [2022-01-19 10:21:55,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 124 transitions, 1199 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-01-19 10:21:55,652 INFO L242 Difference]: Finished difference. Result has 128 places, 101 transitions, 879 flow [2022-01-19 10:21:55,652 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=879, PETRI_PLACES=128, PETRI_TRANSITIONS=101} [2022-01-19 10:21:55,652 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 58 predicate places. [2022-01-19 10:21:55,652 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 101 transitions, 879 flow [2022-01-19 10:21:55,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:55,653 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 10:21:55,653 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 10:21:55,672 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 10:21:55,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 10:21:55,869 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 10:21:55,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 10:21:55,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2022110288, now seen corresponding path program 1 times [2022-01-19 10:21:55,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 10:21:55,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741714811] [2022-01-19 10:21:55,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:21:55,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 10:21:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 10:21:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 10:21:55,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 10:21:55,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741714811] [2022-01-19 10:21:55,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741714811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 10:21:55,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918417156] [2022-01-19 10:21:55,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:21:55,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 10:21:55,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 10:21:56,001 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 10:21:56,020 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 10:21:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 10:21:56,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 10:21:56,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 10:21:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 10:21:56,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 10:21:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 10:21:56,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918417156] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 10:21:56,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 10:21:56,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-19 10:21:56,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362230733] [2022-01-19 10:21:56,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 10:21:56,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 10:21:56,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 10:21:56,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 10:21:56,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-19 10:21:56,431 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 10:21:56,432 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 101 transitions, 879 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:56,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 10:21:56,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 10:21:56,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 10:21:56,702 INFO L129 PetriNetUnfolder]: 77/442 cut-off events. [2022-01-19 10:21:56,703 INFO L130 PetriNetUnfolder]: For 3495/3569 co-relation queries the response was YES. [2022-01-19 10:21:56,705 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 442 events. 77/442 cut-off events. For 3495/3569 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1833 event pairs, 0 based on Foata normal form. 35/433 useless extension candidates. Maximal degree in co-relation 1532. Up to 103 conditions per place. [2022-01-19 10:21:56,706 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 58 selfloop transitions, 27 changer transitions 26/156 dead transitions. [2022-01-19 10:21:56,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 156 transitions, 2115 flow [2022-01-19 10:21:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-19 10:21:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-01-19 10:21:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2022-01-19 10:21:56,709 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-01-19 10:21:56,709 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2022-01-19 10:21:56,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2022-01-19 10:21:56,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 10:21:56,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2022-01-19 10:21:56,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:56,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:56,715 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:56,715 INFO L186 Difference]: Start difference. First operand has 128 places, 101 transitions, 879 flow. Second operand 25 states and 1450 transitions. [2022-01-19 10:21:56,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 156 transitions, 2115 flow [2022-01-19 10:21:56,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 156 transitions, 1698 flow, removed 191 selfloop flow, removed 12 redundant places. [2022-01-19 10:21:56,723 INFO L242 Difference]: Finished difference. Result has 154 places, 115 transitions, 1007 flow [2022-01-19 10:21:56,723 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1007, PETRI_PLACES=154, PETRI_TRANSITIONS=115} [2022-01-19 10:21:56,724 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 84 predicate places. [2022-01-19 10:21:56,724 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 115 transitions, 1007 flow [2022-01-19 10:21:56,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:56,725 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 10:21:56,725 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 10:21:56,754 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 10:21:56,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-19 10:21:56,957 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 10:21:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 10:21:56,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2046027908, now seen corresponding path program 2 times [2022-01-19 10:21:56,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 10:21:56,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299687661] [2022-01-19 10:21:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:21:56,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 10:21:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 10:21:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 10:21:57,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 10:21:57,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299687661] [2022-01-19 10:21:57,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299687661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 10:21:57,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379755939] [2022-01-19 10:21:57,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 10:21:57,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 10:21:57,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 10:21:57,051 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 10:21:57,051 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 10:21:57,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 10:21:57,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 10:21:57,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 10:21:57,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 10:21:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 10:21:57,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 10:21:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 10:21:57,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379755939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 10:21:57,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 10:21:57,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-19 10:21:57,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714929120] [2022-01-19 10:21:57,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 10:21:57,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 10:21:57,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 10:21:57,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 10:21:57,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-19 10:21:57,522 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 10:21:57,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 115 transitions, 1007 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:57,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 10:21:57,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 10:21:57,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 10:21:57,974 INFO L129 PetriNetUnfolder]: 131/812 cut-off events. [2022-01-19 10:21:57,975 INFO L130 PetriNetUnfolder]: For 14446/14599 co-relation queries the response was YES. [2022-01-19 10:21:57,978 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3429 conditions, 812 events. 131/812 cut-off events. For 14446/14599 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4864 event pairs, 0 based on Foata normal form. 44/773 useless extension candidates. Maximal degree in co-relation 3349. Up to 163 conditions per place. [2022-01-19 10:21:57,981 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 58 selfloop transitions, 83 changer transitions 26/212 dead transitions. [2022-01-19 10:21:57,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 212 transitions, 3549 flow [2022-01-19 10:21:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 10:21:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 10:21:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1915 transitions. [2022-01-19 10:21:57,984 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.829004329004329 [2022-01-19 10:21:57,984 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1915 transitions. [2022-01-19 10:21:57,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1915 transitions. [2022-01-19 10:21:57,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 10:21:57,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1915 transitions. [2022-01-19 10:21:57,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.03030303030303) internal successors, (1915), 33 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:57,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:57,992 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:57,992 INFO L186 Difference]: Start difference. First operand has 154 places, 115 transitions, 1007 flow. Second operand 33 states and 1915 transitions. [2022-01-19 10:21:57,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 212 transitions, 3549 flow [2022-01-19 10:21:58,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 212 transitions, 2974 flow, removed 280 selfloop flow, removed 12 redundant places. [2022-01-19 10:21:58,016 INFO L242 Difference]: Finished difference. Result has 188 places, 158 transitions, 1866 flow [2022-01-19 10:21:58,016 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1866, PETRI_PLACES=188, PETRI_TRANSITIONS=158} [2022-01-19 10:21:58,017 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 118 predicate places. [2022-01-19 10:21:58,017 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 158 transitions, 1866 flow [2022-01-19 10:21:58,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:58,018 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 10:21:58,018 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 10:21:58,047 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 10:21:58,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 10:21:58,234 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 10:21:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 10:21:58,234 INFO L85 PathProgramCache]: Analyzing trace with hash 40774668, now seen corresponding path program 3 times [2022-01-19 10:21:58,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 10:21:58,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615307728] [2022-01-19 10:21:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:21:58,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 10:21:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 10:21:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 10:21:58,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 10:21:58,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615307728] [2022-01-19 10:21:58,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615307728] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 10:21:58,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336664944] [2022-01-19 10:21:58,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 10:21:58,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 10:21:58,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 10:21:58,332 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 10:21:58,333 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 10:21:58,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 10:21:58,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 10:21:58,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 10:21:58,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 10:21:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 10:21:58,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 10:21:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 10:21:58,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336664944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 10:21:58,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 10:21:58,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-19 10:21:58,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020332449] [2022-01-19 10:21:58,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 10:21:58,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 10:21:58,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 10:21:58,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 10:21:58,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-01-19 10:21:58,701 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 10:21:58,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 158 transitions, 1866 flow. Second operand has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:58,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 10:21:58,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 10:21:58,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 10:21:59,287 INFO L129 PetriNetUnfolder]: 154/964 cut-off events. [2022-01-19 10:21:59,287 INFO L130 PetriNetUnfolder]: For 33766/33922 co-relation queries the response was YES. [2022-01-19 10:21:59,293 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5024 conditions, 964 events. 154/964 cut-off events. For 33766/33922 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6276 event pairs, 0 based on Foata normal form. 48/916 useless extension candidates. Maximal degree in co-relation 4928. Up to 197 conditions per place. [2022-01-19 10:21:59,297 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 52 selfloop transitions, 124 changer transitions 31/252 dead transitions. [2022-01-19 10:21:59,297 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 252 transitions, 5477 flow [2022-01-19 10:21:59,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-19 10:21:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-01-19 10:21:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2143 transitions. [2022-01-19 10:21:59,300 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8274131274131274 [2022-01-19 10:21:59,300 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2143 transitions. [2022-01-19 10:21:59,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2143 transitions. [2022-01-19 10:21:59,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 10:21:59,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2143 transitions. [2022-01-19 10:21:59,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.91891891891892) internal successors, (2143), 37 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:59,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:59,306 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:59,306 INFO L186 Difference]: Start difference. First operand has 188 places, 158 transitions, 1866 flow. Second operand 37 states and 2143 transitions. [2022-01-19 10:21:59,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 252 transitions, 5477 flow [2022-01-19 10:21:59,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 252 transitions, 4629 flow, removed 405 selfloop flow, removed 18 redundant places. [2022-01-19 10:21:59,356 INFO L242 Difference]: Finished difference. Result has 220 places, 193 transitions, 2752 flow [2022-01-19 10:21:59,356 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2752, PETRI_PLACES=220, PETRI_TRANSITIONS=193} [2022-01-19 10:21:59,356 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 150 predicate places. [2022-01-19 10:21:59,356 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 193 transitions, 2752 flow [2022-01-19 10:21:59,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:21:59,357 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 10:21:59,357 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:21:59,386 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 10:21:59,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 10:21:59,574 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 10:21:59,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 10:21:59,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1240022064, now seen corresponding path program 4 times [2022-01-19 10:21:59,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 10:21:59,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304707104] [2022-01-19 10:21:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:21:59,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 10:21:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 10:21:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 10:21:59,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 10:21:59,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304707104] [2022-01-19 10:21:59,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304707104] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 10:21:59,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366473910] [2022-01-19 10:21:59,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 10:21:59,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 10:21:59,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 10:21:59,710 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 10:21:59,711 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 10:21:59,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 10:21:59,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 10:21:59,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-19 10:21:59,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 10:21:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 10:21:59,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 10:22:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 10:22:00,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366473910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 10:22:00,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 10:22:00,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2022-01-19 10:22:00,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351371173] [2022-01-19 10:22:00,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 10:22:00,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 10:22:00,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 10:22:00,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 10:22:00,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-19 10:22:00,097 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 10:22:00,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 193 transitions, 2752 flow. Second operand has 16 states, 16 states have (on average 56.25) internal successors, (900), 16 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:22:00,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 10:22:00,097 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 10:22:00,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 10:22:00,391 INFO L129 PetriNetUnfolder]: 149/985 cut-off events. [2022-01-19 10:22:00,392 INFO L130 PetriNetUnfolder]: For 42928/43032 co-relation queries the response was YES. [2022-01-19 10:22:00,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5334 conditions, 985 events. 149/985 cut-off events. For 42928/43032 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6442 event pairs, 1 based on Foata normal form. 32/915 useless extension candidates. Maximal degree in co-relation 5226. Up to 183 conditions per place. [2022-01-19 10:22:00,405 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 61 selfloop transitions, 120 changer transitions 5/231 dead transitions. [2022-01-19 10:22:00,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 231 transitions, 4844 flow [2022-01-19 10:22:00,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-19 10:22:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-01-19 10:22:00,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1327 transitions. [2022-01-19 10:22:00,406 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.824223602484472 [2022-01-19 10:22:00,406 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1327 transitions. [2022-01-19 10:22:00,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1327 transitions. [2022-01-19 10:22:00,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 10:22:00,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1327 transitions. [2022-01-19 10:22:00,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 57.69565217391305) internal successors, (1327), 23 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:22:00,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 70.0) internal successors, (1680), 24 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:22:00,410 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 70.0) internal successors, (1680), 24 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:22:00,410 INFO L186 Difference]: Start difference. First operand has 220 places, 193 transitions, 2752 flow. Second operand 23 states and 1327 transitions. [2022-01-19 10:22:00,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 231 transitions, 4844 flow [2022-01-19 10:22:00,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 231 transitions, 3908 flow, removed 434 selfloop flow, removed 21 redundant places. [2022-01-19 10:22:00,480 INFO L242 Difference]: Finished difference. Result has 222 places, 209 transitions, 2916 flow [2022-01-19 10:22:00,480 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2236, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2916, PETRI_PLACES=222, PETRI_TRANSITIONS=209} [2022-01-19 10:22:00,480 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 152 predicate places. [2022-01-19 10:22:00,480 INFO L470 AbstractCegarLoop]: Abstraction has has 222 places, 209 transitions, 2916 flow [2022-01-19 10:22:00,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.25) internal successors, (900), 16 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 10:22:00,481 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 10:22:00,481 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:22:00,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 10:22:00,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 10:22:00,700 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 10:22:00,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 10:22:00,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1578660665, now seen corresponding path program 5 times [2022-01-19 10:22:00,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 10:22:00,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16129409] [2022-01-19 10:22:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 10:22:00,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 10:22:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-19 10:22:00,717 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-19 10:22:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-19 10:22:00,739 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-19 10:22:00,739 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-19 10:22:00,740 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 10:22:00,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 10:22:00,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 10:22:00,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-19 10:22:00,743 INFO L732 BasicCegarLoop]: Path program histogram: [5, 3, 2, 1, 1, 1] [2022-01-19 10:22:00,746 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 10:22:00,746 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 10:22:00,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 10:22:00 BasicIcfg [2022-01-19 10:22:00,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 10:22:00,786 INFO L158 Benchmark]: Toolchain (without parser) took 8267.54ms. Allocated memory was 350.2MB in the beginning and 492.8MB in the end (delta: 142.6MB). Free memory was 295.0MB in the beginning and 301.3MB in the end (delta: -6.3MB). Peak memory consumption was 138.8MB. Max. memory is 16.0GB. [2022-01-19 10:22:00,787 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 350.2MB. Free memory is still 312.7MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 10:22:00,787 INFO L158 Benchmark]: CACSL2BoogieTranslator took 339.16ms. Allocated memory was 350.2MB in the beginning and 492.8MB in the end (delta: 142.6MB). Free memory was 294.9MB in the beginning and 457.7MB in the end (delta: -162.9MB). Peak memory consumption was 9.1MB. Max. memory is 16.0GB. [2022-01-19 10:22:00,787 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.49ms. Allocated memory is still 492.8MB. Free memory was 457.7MB in the beginning and 456.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 10:22:00,787 INFO L158 Benchmark]: Boogie Preprocessor took 26.36ms. Allocated memory is still 492.8MB. Free memory was 456.7MB in the beginning and 454.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 10:22:00,787 INFO L158 Benchmark]: RCFGBuilder took 252.10ms. Allocated memory is still 492.8MB. Free memory was 454.6MB in the beginning and 439.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-19 10:22:00,788 INFO L158 Benchmark]: TraceAbstraction took 7606.85ms. Allocated memory is still 492.8MB. Free memory was 439.9MB in the beginning and 301.3MB in the end (delta: 138.6MB). Peak memory consumption was 138.6MB. Max. memory is 16.0GB. [2022-01-19 10:22:00,789 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 350.2MB. Free memory is still 312.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 339.16ms. Allocated memory was 350.2MB in the beginning and 492.8MB in the end (delta: 142.6MB). Free memory was 294.9MB in the beginning and 457.7MB in the end (delta: -162.9MB). Peak memory consumption was 9.1MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 38.49ms. Allocated memory is still 492.8MB. Free memory was 457.7MB in the beginning and 456.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 26.36ms. Allocated memory is still 492.8MB. Free memory was 456.7MB in the beginning and 454.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 252.10ms. Allocated memory is still 492.8MB. Free memory was 454.6MB in the beginning and 439.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 7606.85ms. Allocated memory is still 492.8MB. Free memory was 439.9MB in the beginning and 301.3MB in the end (delta: 138.6MB). Peak memory consumption was 138.6MB. 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 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [\old(argc)=49, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L716] 0 int condI = i >= (2*5 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=6, k=0] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=1, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=2] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L719] 0 int condJ = j >= (2*5 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=15, id1={5:0}, id2={3:0}, j=16, k=4, k=4] [L721] COND TRUE 0 condI || condJ VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=15, id1={5:0}, id2={3:0}, j=16, k=4, k=4] [L722] 0 reach_error() VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=15, id1={5:0}, id2={3:0}, j=16, k=4, k=4] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.5s, OverallIterations: 13, TraceHistogramMax: 5, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 427 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 427 mSDsluCounter, 179 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 242 mSDsCounter, 382 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1195 IncrementalHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 382 mSolverCounterUnsat, 56 mSDtfsCounter, 1195 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 855 GetRequests, 611 SyntacticMatches, 4 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2916occurred in iteration=12, InterpolantAutomatonStates: 205, 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, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 994 NumberOfCodeBlocks, 994 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1204 ConstructedInterpolants, 0 QuantifiedInterpolants, 4200 SizeOfPredicates, 32 NumberOfNonLiveVariables, 800 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 22 InterpolantComputations, 7 PerfectInterpolantSequences, 45/390 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 proved your program to be incorrect! [2022-01-19 10:22:00,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...