./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe002_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-wmm/safe002_tso.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3743abf17a0d3db70a931712c22f305431bb6e8feb7b662539ff9c5190491352 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:10:46,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:10:46,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:10:46,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:10:46,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:10:46,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:10:46,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:10:46,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:10:46,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:10:46,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:10:46,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:10:46,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:10:46,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:10:46,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:10:46,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:10:46,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:10:46,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:10:46,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:10:46,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:10:46,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:10:46,851 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:10:46,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:10:46,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:10:46,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:10:46,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:10:46,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:10:46,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:10:46,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:10:46,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:10:46,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:10:46,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:10:46,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:10:46,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:10:46,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:10:46,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:10:46,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:10:46,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:10:46,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:10:46,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:10:46,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:10:46,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:10:46,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:10:46,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:10:46,893 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:10:46,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:10:46,894 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:10:46,894 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:10:46,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:10:46,895 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:10:46,895 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:10:46,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:10:46,896 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:10:46,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:10:46,896 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:10:46,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:10:46,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:10:46,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:10:46,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:10:46,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:10:46,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:10:46,897 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:10:46,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:10:46,898 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:10:46,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:10:46,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:10:46,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:10:46,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:10:46,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:10:46,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:10:46,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:10:46,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:10:46,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:10:46,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:10:46,899 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:10:46,899 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:10:46,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:10:46,900 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3743abf17a0d3db70a931712c22f305431bb6e8feb7b662539ff9c5190491352 [2022-07-19 21:10:47,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:10:47,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:10:47,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:10:47,103 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:10:47,104 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:10:47,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe002_tso.i [2022-07-19 21:10:47,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f35893f7/cdf73a233fce4515b3bc55b8817065c3/FLAGd35e64df7 [2022-07-19 21:10:47,562 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:10:47,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe002_tso.i [2022-07-19 21:10:47,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f35893f7/cdf73a233fce4515b3bc55b8817065c3/FLAGd35e64df7 [2022-07-19 21:10:47,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f35893f7/cdf73a233fce4515b3bc55b8817065c3 [2022-07-19 21:10:47,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:10:47,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:10:47,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:10:47,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:10:47,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:10:47,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:10:47" (1/1) ... [2022-07-19 21:10:47,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61c1b67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:47, skipping insertion in model container [2022-07-19 21:10:47,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:10:47" (1/1) ... [2022-07-19 21:10:47,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:10:47,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:10:47,755 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe002_tso.i[945,958] [2022-07-19 21:10:47,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:10:47,854 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:10:47,862 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe002_tso.i[945,958] [2022-07-19 21:10:47,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:10:47,900 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:10:47,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:47 WrapperNode [2022-07-19 21:10:47,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:10:47,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:10:47,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:10:47,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:10:47,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:47" (1/1) ... [2022-07-19 21:10:47,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:47" (1/1) ... [2022-07-19 21:10:47,952 INFO L137 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2022-07-19 21:10:47,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:10:47,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:10:47,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:10:47,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:10:47,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:47" (1/1) ... [2022-07-19 21:10:47,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:47" (1/1) ... [2022-07-19 21:10:47,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:47" (1/1) ... [2022-07-19 21:10:47,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:47" (1/1) ... [2022-07-19 21:10:47,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:47" (1/1) ... [2022-07-19 21:10:47,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:47" (1/1) ... [2022-07-19 21:10:47,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:47" (1/1) ... [2022-07-19 21:10:47,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:10:47,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:10:47,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:10:47,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:10:47,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:47" (1/1) ... [2022-07-19 21:10:47,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:10:47,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:10:47,999 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) [2022-07-19 21:10:48,001 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 [2022-07-19 21:10:48,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:10:48,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:10:48,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:10:48,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:10:48,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:10:48,036 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-07-19 21:10:48,039 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-07-19 21:10:48,039 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-07-19 21:10:48,039 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-07-19 21:10:48,039 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-07-19 21:10:48,039 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-07-19 21:10:48,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:10:48,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:10:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:10:48,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:10:48,041 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:10:48,126 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:10:48,127 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:10:48,272 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:10:48,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:10:48,276 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 21:10:48,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:10:48 BoogieIcfgContainer [2022-07-19 21:10:48,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:10:48,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:10:48,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:10:48,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:10:48,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:10:47" (1/3) ... [2022-07-19 21:10:48,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131bb23f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:10:48, skipping insertion in model container [2022-07-19 21:10:48,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:47" (2/3) ... [2022-07-19 21:10:48,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131bb23f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:10:48, skipping insertion in model container [2022-07-19 21:10:48,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:10:48" (3/3) ... [2022-07-19 21:10:48,285 INFO L111 eAbstractionObserver]: Analyzing ICFG safe002_tso.i [2022-07-19 21:10:48,289 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:10:48,307 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:10:48,307 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:10:48,307 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:10:48,346 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:10:48,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 92 transitions, 199 flow [2022-07-19 21:10:48,433 INFO L129 PetriNetUnfolder]: 2/89 cut-off events. [2022-07-19 21:10:48,434 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:10:48,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 2/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 68. Up to 2 conditions per place. [2022-07-19 21:10:48,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 92 transitions, 199 flow [2022-07-19 21:10:48,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 75 transitions, 159 flow [2022-07-19 21:10:48,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:10:48,461 INFO L357 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=true, 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7067b817, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2f44a9bc [2022-07-19 21:10:48,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:10:48,483 INFO L129 PetriNetUnfolder]: 1/74 cut-off events. [2022-07-19 21:10:48,483 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:10:48,484 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:48,484 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:10:48,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:48,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:48,489 INFO L85 PathProgramCache]: Analyzing trace with hash -669003802, now seen corresponding path program 1 times [2022-07-19 21:10:48,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:48,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294412776] [2022-07-19 21:10:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:48,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:48,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:48,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294412776] [2022-07-19 21:10:48,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294412776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:48,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:48,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:48,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566355879] [2022-07-19 21:10:48,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:48,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:48,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:48,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:48,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:48,921 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2022-07-19 21:10:48,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 159 flow. Second operand has 7 states, 7 states have (on average 71.85714285714286) internal successors, (503), 7 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:48,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:48,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2022-07-19 21:10:48,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:49,193 INFO L129 PetriNetUnfolder]: 350/899 cut-off events. [2022-07-19 21:10:49,194 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-19 21:10:49,197 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1524 conditions, 899 events. 350/899 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5319 event pairs, 58 based on Foata normal form. 31/894 useless extension candidates. Maximal degree in co-relation 1486. Up to 188 conditions per place. [2022-07-19 21:10:49,201 INFO L132 encePairwiseOnDemand]: 81/92 looper letters, 26 selfloop transitions, 6 changer transitions 47/135 dead transitions. [2022-07-19 21:10:49,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 135 transitions, 446 flow [2022-07-19 21:10:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:10:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:10:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 995 transitions. [2022-07-19 21:10:49,213 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8319397993311036 [2022-07-19 21:10:49,213 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 995 transitions. [2022-07-19 21:10:49,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 995 transitions. [2022-07-19 21:10:49,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:49,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 995 transitions. [2022-07-19 21:10:49,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.53846153846153) internal successors, (995), 13 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:49,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:49,226 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:49,228 INFO L186 Difference]: Start difference. First operand has 84 places, 75 transitions, 159 flow. Second operand 13 states and 995 transitions. [2022-07-19 21:10:49,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 135 transitions, 446 flow [2022-07-19 21:10:49,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 135 transitions, 440 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:10:49,233 INFO L242 Difference]: Finished difference. Result has 105 places, 78 transitions, 240 flow [2022-07-19 21:10:49,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=240, PETRI_PLACES=105, PETRI_TRANSITIONS=78} [2022-07-19 21:10:49,236 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 21 predicate places. [2022-07-19 21:10:49,236 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 78 transitions, 240 flow [2022-07-19 21:10:49,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.85714285714286) internal successors, (503), 7 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:49,242 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:49,242 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:10:49,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:10:49,243 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:49,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:49,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1081069657, now seen corresponding path program 1 times [2022-07-19 21:10:49,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:49,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354915677] [2022-07-19 21:10:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:49,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:49,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:49,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354915677] [2022-07-19 21:10:49,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354915677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:49,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:49,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:49,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574857983] [2022-07-19 21:10:49,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:49,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:49,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:49,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:49,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:49,368 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2022-07-19 21:10:49,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 78 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:49,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:49,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2022-07-19 21:10:49,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:49,604 INFO L129 PetriNetUnfolder]: 194/648 cut-off events. [2022-07-19 21:10:49,604 INFO L130 PetriNetUnfolder]: For 1321/1550 co-relation queries the response was YES. [2022-07-19 21:10:49,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1971 conditions, 648 events. 194/648 cut-off events. For 1321/1550 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3704 event pairs, 4 based on Foata normal form. 19/649 useless extension candidates. Maximal degree in co-relation 1922. Up to 147 conditions per place. [2022-07-19 21:10:49,621 INFO L132 encePairwiseOnDemand]: 79/92 looper letters, 24 selfloop transitions, 15 changer transitions 52/147 dead transitions. [2022-07-19 21:10:49,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 147 transitions, 926 flow [2022-07-19 21:10:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:10:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:10:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 989 transitions. [2022-07-19 21:10:49,624 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8269230769230769 [2022-07-19 21:10:49,624 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 989 transitions. [2022-07-19 21:10:49,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 989 transitions. [2022-07-19 21:10:49,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:49,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 989 transitions. [2022-07-19 21:10:49,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.07692307692308) internal successors, (989), 13 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:49,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:49,628 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:49,629 INFO L186 Difference]: Start difference. First operand has 105 places, 78 transitions, 240 flow. Second operand 13 states and 989 transitions. [2022-07-19 21:10:49,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 147 transitions, 926 flow [2022-07-19 21:10:49,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 147 transitions, 898 flow, removed 12 selfloop flow, removed 4 redundant places. [2022-07-19 21:10:49,638 INFO L242 Difference]: Finished difference. Result has 116 places, 86 transitions, 391 flow [2022-07-19 21:10:49,638 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=391, PETRI_PLACES=116, PETRI_TRANSITIONS=86} [2022-07-19 21:10:49,639 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 32 predicate places. [2022-07-19 21:10:49,639 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 86 transitions, 391 flow [2022-07-19 21:10:49,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:49,640 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:49,640 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:10:49,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:10:49,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:49,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:49,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1069337848, now seen corresponding path program 1 times [2022-07-19 21:10:49,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:49,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576000298] [2022-07-19 21:10:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:49,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:49,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:49,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576000298] [2022-07-19 21:10:49,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576000298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:49,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:49,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:49,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406026276] [2022-07-19 21:10:49,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:49,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:49,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:49,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:49,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:49,739 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 92 [2022-07-19 21:10:49,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 86 transitions, 391 flow. Second operand has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:49,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:49,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 92 [2022-07-19 21:10:49,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:49,854 INFO L129 PetriNetUnfolder]: 106/475 cut-off events. [2022-07-19 21:10:49,855 INFO L130 PetriNetUnfolder]: For 1867/2487 co-relation queries the response was YES. [2022-07-19 21:10:49,857 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1692 conditions, 475 events. 106/475 cut-off events. For 1867/2487 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2767 event pairs, 53 based on Foata normal form. 10/458 useless extension candidates. Maximal degree in co-relation 1629. Up to 109 conditions per place. [2022-07-19 21:10:49,859 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 19 selfloop transitions, 6 changer transitions 25/110 dead transitions. [2022-07-19 21:10:49,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 110 transitions, 716 flow [2022-07-19 21:10:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:10:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:10:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 549 transitions. [2022-07-19 21:10:49,861 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8524844720496895 [2022-07-19 21:10:49,861 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 549 transitions. [2022-07-19 21:10:49,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 549 transitions. [2022-07-19 21:10:49,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:49,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 549 transitions. [2022-07-19 21:10:49,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:49,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 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) [2022-07-19 21:10:49,864 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 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) [2022-07-19 21:10:49,864 INFO L186 Difference]: Start difference. First operand has 116 places, 86 transitions, 391 flow. Second operand 7 states and 549 transitions. [2022-07-19 21:10:49,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 110 transitions, 716 flow [2022-07-19 21:10:49,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 110 transitions, 676 flow, removed 20 selfloop flow, removed 3 redundant places. [2022-07-19 21:10:49,870 INFO L242 Difference]: Finished difference. Result has 114 places, 82 transitions, 345 flow [2022-07-19 21:10:49,870 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=345, PETRI_PLACES=114, PETRI_TRANSITIONS=82} [2022-07-19 21:10:49,871 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 30 predicate places. [2022-07-19 21:10:49,871 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 82 transitions, 345 flow [2022-07-19 21:10:49,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:49,872 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:49,872 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:10:49,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:10:49,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:49,873 INFO L85 PathProgramCache]: Analyzing trace with hash -821934836, now seen corresponding path program 1 times [2022-07-19 21:10:49,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:49,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506406493] [2022-07-19 21:10:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:49,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:49,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:49,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506406493] [2022-07-19 21:10:49,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506406493] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:49,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:49,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:49,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010475636] [2022-07-19 21:10:49,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:49,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:49,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:49,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:49,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:49,981 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2022-07-19 21:10:49,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 82 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:49,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:49,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2022-07-19 21:10:49,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:50,107 INFO L129 PetriNetUnfolder]: 72/356 cut-off events. [2022-07-19 21:10:50,108 INFO L130 PetriNetUnfolder]: For 953/1225 co-relation queries the response was YES. [2022-07-19 21:10:50,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 356 events. 72/356 cut-off events. For 953/1225 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1798 event pairs, 5 based on Foata normal form. 11/355 useless extension candidates. Maximal degree in co-relation 1112. Up to 76 conditions per place. [2022-07-19 21:10:50,110 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 23 selfloop transitions, 9 changer transitions 26/114 dead transitions. [2022-07-19 21:10:50,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 114 transitions, 729 flow [2022-07-19 21:10:50,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:10:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:10:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 749 transitions. [2022-07-19 21:10:50,112 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8141304347826087 [2022-07-19 21:10:50,112 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 749 transitions. [2022-07-19 21:10:50,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 749 transitions. [2022-07-19 21:10:50,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:50,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 749 transitions. [2022-07-19 21:10:50,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 74.9) internal successors, (749), 10 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,117 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,118 INFO L186 Difference]: Start difference. First operand has 114 places, 82 transitions, 345 flow. Second operand 10 states and 749 transitions. [2022-07-19 21:10:50,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 114 transitions, 729 flow [2022-07-19 21:10:50,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 114 transitions, 634 flow, removed 30 selfloop flow, removed 11 redundant places. [2022-07-19 21:10:50,123 INFO L242 Difference]: Finished difference. Result has 116 places, 81 transitions, 313 flow [2022-07-19 21:10:50,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=313, PETRI_PLACES=116, PETRI_TRANSITIONS=81} [2022-07-19 21:10:50,124 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 32 predicate places. [2022-07-19 21:10:50,127 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 81 transitions, 313 flow [2022-07-19 21:10:50,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,128 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:50,128 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:10:50,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:10:50,128 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:50,129 INFO L85 PathProgramCache]: Analyzing trace with hash 883716798, now seen corresponding path program 2 times [2022-07-19 21:10:50,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:50,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629790661] [2022-07-19 21:10:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:50,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:50,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:50,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629790661] [2022-07-19 21:10:50,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629790661] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:50,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:50,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:50,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45086136] [2022-07-19 21:10:50,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:50,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:50,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:50,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:50,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:50,203 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 92 [2022-07-19 21:10:50,203 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 81 transitions, 313 flow. Second operand has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,203 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:50,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 92 [2022-07-19 21:10:50,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:50,275 INFO L129 PetriNetUnfolder]: 25/218 cut-off events. [2022-07-19 21:10:50,276 INFO L130 PetriNetUnfolder]: For 566/787 co-relation queries the response was YES. [2022-07-19 21:10:50,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 218 events. 25/218 cut-off events. For 566/787 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 944 event pairs, 12 based on Foata normal form. 9/218 useless extension candidates. Maximal degree in co-relation 607. Up to 35 conditions per place. [2022-07-19 21:10:50,277 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 16 selfloop transitions, 5 changer transitions 13/94 dead transitions. [2022-07-19 21:10:50,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 94 transitions, 499 flow [2022-07-19 21:10:50,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:10:50,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:10:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 540 transitions. [2022-07-19 21:10:50,279 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8385093167701864 [2022-07-19 21:10:50,279 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 540 transitions. [2022-07-19 21:10:50,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 540 transitions. [2022-07-19 21:10:50,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:50,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 540 transitions. [2022-07-19 21:10:50,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.14285714285714) internal successors, (540), 7 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 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) [2022-07-19 21:10:50,281 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 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) [2022-07-19 21:10:50,281 INFO L186 Difference]: Start difference. First operand has 116 places, 81 transitions, 313 flow. Second operand 7 states and 540 transitions. [2022-07-19 21:10:50,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 94 transitions, 499 flow [2022-07-19 21:10:50,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 94 transitions, 470 flow, removed 12 selfloop flow, removed 7 redundant places. [2022-07-19 21:10:50,286 INFO L242 Difference]: Finished difference. Result has 113 places, 79 transitions, 299 flow [2022-07-19 21:10:50,286 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=299, PETRI_PLACES=113, PETRI_TRANSITIONS=79} [2022-07-19 21:10:50,288 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 29 predicate places. [2022-07-19 21:10:50,288 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 79 transitions, 299 flow [2022-07-19 21:10:50,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,288 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:50,289 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:10:50,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:10:50,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:50,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1927095409, now seen corresponding path program 1 times [2022-07-19 21:10:50,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:50,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844851542] [2022-07-19 21:10:50,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:50,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:50,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:50,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844851542] [2022-07-19 21:10:50,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844851542] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:50,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:50,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:50,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220889402] [2022-07-19 21:10:50,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:50,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:50,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:50,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:50,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:50,370 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 92 [2022-07-19 21:10:50,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 79 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 75.14285714285714) internal successors, (526), 7 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) [2022-07-19 21:10:50,371 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:50,371 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 92 [2022-07-19 21:10:50,371 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:50,457 INFO L129 PetriNetUnfolder]: 13/154 cut-off events. [2022-07-19 21:10:50,457 INFO L130 PetriNetUnfolder]: For 251/281 co-relation queries the response was YES. [2022-07-19 21:10:50,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 392 conditions, 154 events. 13/154 cut-off events. For 251/281 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 430 event pairs, 8 based on Foata normal form. 5/150 useless extension candidates. Maximal degree in co-relation 369. Up to 22 conditions per place. [2022-07-19 21:10:50,458 INFO L132 encePairwiseOnDemand]: 85/92 looper letters, 14 selfloop transitions, 2 changer transitions 11/85 dead transitions. [2022-07-19 21:10:50,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 85 transitions, 381 flow [2022-07-19 21:10:50,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:10:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:10:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 609 transitions. [2022-07-19 21:10:50,460 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8274456521739131 [2022-07-19 21:10:50,460 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 609 transitions. [2022-07-19 21:10:50,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 609 transitions. [2022-07-19 21:10:50,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:50,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 609 transitions. [2022-07-19 21:10:50,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 76.125) internal successors, (609), 8 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 92.0) internal successors, (828), 9 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,464 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 92.0) internal successors, (828), 9 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,464 INFO L186 Difference]: Start difference. First operand has 113 places, 79 transitions, 299 flow. Second operand 8 states and 609 transitions. [2022-07-19 21:10:50,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 85 transitions, 381 flow [2022-07-19 21:10:50,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 85 transitions, 348 flow, removed 8 selfloop flow, removed 8 redundant places. [2022-07-19 21:10:50,467 INFO L242 Difference]: Finished difference. Result has 113 places, 73 transitions, 228 flow [2022-07-19 21:10:50,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=228, PETRI_PLACES=113, PETRI_TRANSITIONS=73} [2022-07-19 21:10:50,469 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 29 predicate places. [2022-07-19 21:10:50,469 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 73 transitions, 228 flow [2022-07-19 21:10:50,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.14285714285714) internal successors, (526), 7 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) [2022-07-19 21:10:50,469 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:50,470 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:10:50,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:10:50,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:50,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2069639245, now seen corresponding path program 2 times [2022-07-19 21:10:50,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:50,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047301378] [2022-07-19 21:10:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:50,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:50,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:50,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047301378] [2022-07-19 21:10:50,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047301378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:50,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:50,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:10:50,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765624094] [2022-07-19 21:10:50,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:50,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:10:50,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:50,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:10:50,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:10:50,552 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-07-19 21:10:50,552 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 73 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 76.66666666666667) internal successors, (460), 6 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,552 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:50,552 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-07-19 21:10:50,552 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:50,642 INFO L129 PetriNetUnfolder]: 113/361 cut-off events. [2022-07-19 21:10:50,643 INFO L130 PetriNetUnfolder]: For 213/214 co-relation queries the response was YES. [2022-07-19 21:10:50,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 361 events. 113/361 cut-off events. For 213/214 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1722 event pairs, 14 based on Foata normal form. 8/354 useless extension candidates. Maximal degree in co-relation 735. Up to 90 conditions per place. [2022-07-19 21:10:50,645 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 14 selfloop transitions, 6 changer transitions 19/99 dead transitions. [2022-07-19 21:10:50,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 99 transitions, 360 flow [2022-07-19 21:10:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:10:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:10:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 716 transitions. [2022-07-19 21:10:50,647 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8647342995169082 [2022-07-19 21:10:50,647 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 716 transitions. [2022-07-19 21:10:50,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 716 transitions. [2022-07-19 21:10:50,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:50,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 716 transitions. [2022-07-19 21:10:50,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.55555555555556) internal successors, (716), 9 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,651 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,651 INFO L186 Difference]: Start difference. First operand has 113 places, 73 transitions, 228 flow. Second operand 9 states and 716 transitions. [2022-07-19 21:10:50,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 99 transitions, 360 flow [2022-07-19 21:10:50,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 99 transitions, 322 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-07-19 21:10:50,653 INFO L242 Difference]: Finished difference. Result has 109 places, 76 transitions, 246 flow [2022-07-19 21:10:50,653 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=246, PETRI_PLACES=109, PETRI_TRANSITIONS=76} [2022-07-19 21:10:50,654 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 25 predicate places. [2022-07-19 21:10:50,654 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 76 transitions, 246 flow [2022-07-19 21:10:50,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.66666666666667) internal successors, (460), 6 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,654 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:50,655 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:10:50,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:10:50,655 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:50,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:50,655 INFO L85 PathProgramCache]: Analyzing trace with hash 98531652, now seen corresponding path program 1 times [2022-07-19 21:10:50,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:50,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253880487] [2022-07-19 21:10:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:50,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:50,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:50,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253880487] [2022-07-19 21:10:50,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253880487] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:50,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:50,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:50,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044352894] [2022-07-19 21:10:50,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:50,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:50,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:50,731 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-07-19 21:10:50,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 76 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:50,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-07-19 21:10:50,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:50,851 INFO L129 PetriNetUnfolder]: 60/238 cut-off events. [2022-07-19 21:10:50,852 INFO L130 PetriNetUnfolder]: For 365/399 co-relation queries the response was YES. [2022-07-19 21:10:50,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 238 events. 60/238 cut-off events. For 365/399 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 863 event pairs, 4 based on Foata normal form. 12/245 useless extension candidates. Maximal degree in co-relation 683. Up to 79 conditions per place. [2022-07-19 21:10:50,854 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 14 selfloop transitions, 9 changer transitions 19/102 dead transitions. [2022-07-19 21:10:50,854 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 102 transitions, 511 flow [2022-07-19 21:10:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:10:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:10:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 794 transitions. [2022-07-19 21:10:50,856 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8630434782608696 [2022-07-19 21:10:50,856 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 794 transitions. [2022-07-19 21:10:50,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 794 transitions. [2022-07-19 21:10:50,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:50,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 794 transitions. [2022-07-19 21:10:50,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 79.4) internal successors, (794), 10 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,860 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,860 INFO L186 Difference]: Start difference. First operand has 109 places, 76 transitions, 246 flow. Second operand 10 states and 794 transitions. [2022-07-19 21:10:50,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 102 transitions, 511 flow [2022-07-19 21:10:50,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 102 transitions, 485 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-07-19 21:10:50,863 INFO L242 Difference]: Finished difference. Result has 114 places, 79 transitions, 312 flow [2022-07-19 21:10:50,863 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=312, PETRI_PLACES=114, PETRI_TRANSITIONS=79} [2022-07-19 21:10:50,863 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 30 predicate places. [2022-07-19 21:10:50,863 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 79 transitions, 312 flow [2022-07-19 21:10:50,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,864 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:50,864 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:10:50,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:10:50,864 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:50,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:50,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1560518903, now seen corresponding path program 1 times [2022-07-19 21:10:50,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:50,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674375315] [2022-07-19 21:10:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:50,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:50,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:50,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674375315] [2022-07-19 21:10:50,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674375315] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:50,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:50,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:10:50,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312463202] [2022-07-19 21:10:50,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:50,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:10:50,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:50,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:10:50,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:10:50,955 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-07-19 21:10:50,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 79 transitions, 312 flow. Second operand has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:50,956 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:50,956 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-07-19 21:10:50,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:51,046 INFO L129 PetriNetUnfolder]: 17/126 cut-off events. [2022-07-19 21:10:51,046 INFO L130 PetriNetUnfolder]: For 429/475 co-relation queries the response was YES. [2022-07-19 21:10:51,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 126 events. 17/126 cut-off events. For 429/475 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 243 event pairs, 0 based on Foata normal form. 14/139 useless extension candidates. Maximal degree in co-relation 379. Up to 31 conditions per place. [2022-07-19 21:10:51,047 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 8 selfloop transitions, 12 changer transitions 13/93 dead transitions. [2022-07-19 21:10:51,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 93 transitions, 508 flow [2022-07-19 21:10:51,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:10:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:10:51,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 860 transitions. [2022-07-19 21:10:51,049 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.849802371541502 [2022-07-19 21:10:51,049 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 860 transitions. [2022-07-19 21:10:51,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 860 transitions. [2022-07-19 21:10:51,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:51,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 860 transitions. [2022-07-19 21:10:51,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 78.18181818181819) internal successors, (860), 11 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:51,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 92.0) internal successors, (1104), 12 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:51,053 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 92.0) internal successors, (1104), 12 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:51,053 INFO L186 Difference]: Start difference. First operand has 114 places, 79 transitions, 312 flow. Second operand 11 states and 860 transitions. [2022-07-19 21:10:51,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 93 transitions, 508 flow [2022-07-19 21:10:51,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 93 transitions, 393 flow, removed 47 selfloop flow, removed 14 redundant places. [2022-07-19 21:10:51,056 INFO L242 Difference]: Finished difference. Result has 112 places, 79 transitions, 282 flow [2022-07-19 21:10:51,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=282, PETRI_PLACES=112, PETRI_TRANSITIONS=79} [2022-07-19 21:10:51,056 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 28 predicate places. [2022-07-19 21:10:51,057 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 79 transitions, 282 flow [2022-07-19 21:10:51,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:51,057 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:51,057 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:10:51,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:10:51,058 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:51,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:51,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1434165886, now seen corresponding path program 1 times [2022-07-19 21:10:51,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:51,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498762295] [2022-07-19 21:10:51,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:51,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:51,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:51,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498762295] [2022-07-19 21:10:51,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498762295] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:51,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:51,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:51,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586801698] [2022-07-19 21:10:51,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:51,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:51,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:51,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:51,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:51,112 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-07-19 21:10:51,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 79 transitions, 282 flow. Second operand has 7 states, 7 states have (on average 76.85714285714286) internal successors, (538), 7 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:51,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:51,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-07-19 21:10:51,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:51,161 INFO L129 PetriNetUnfolder]: 6/94 cut-off events. [2022-07-19 21:10:51,162 INFO L130 PetriNetUnfolder]: For 89/95 co-relation queries the response was YES. [2022-07-19 21:10:51,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 94 events. 6/94 cut-off events. For 89/95 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 91 event pairs, 0 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 189. Up to 11 conditions per place. [2022-07-19 21:10:51,162 INFO L132 encePairwiseOnDemand]: 86/92 looper letters, 0 selfloop transitions, 0 changer transitions 78/78 dead transitions. [2022-07-19 21:10:51,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 78 transitions, 308 flow [2022-07-19 21:10:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:10:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:10:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 539 transitions. [2022-07-19 21:10:51,164 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8369565217391305 [2022-07-19 21:10:51,164 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 539 transitions. [2022-07-19 21:10:51,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 539 transitions. [2022-07-19 21:10:51,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:51,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 539 transitions. [2022-07-19 21:10:51,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:51,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 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) [2022-07-19 21:10:51,166 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 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) [2022-07-19 21:10:51,167 INFO L186 Difference]: Start difference. First operand has 112 places, 79 transitions, 282 flow. Second operand 7 states and 539 transitions. [2022-07-19 21:10:51,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 78 transitions, 308 flow [2022-07-19 21:10:51,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 78 transitions, 226 flow, removed 22 selfloop flow, removed 15 redundant places. [2022-07-19 21:10:51,168 INFO L242 Difference]: Finished difference. Result has 97 places, 0 transitions, 0 flow [2022-07-19 21:10:51,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=97, PETRI_TRANSITIONS=0} [2022-07-19 21:10:51,169 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 13 predicate places. [2022-07-19 21:10:51,169 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 0 transitions, 0 flow [2022-07-19 21:10:51,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.85714285714286) internal successors, (538), 7 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:10:51,171 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-07-19 21:10:51,172 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-07-19 21:10:51,172 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-19 21:10:51,172 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-07-19 21:10:51,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:10:51,172 INFO L356 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-07-19 21:10:51,175 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-19 21:10:51,175 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 21:10:51,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:10:51 BasicIcfg [2022-07-19 21:10:51,178 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 21:10:51,178 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 21:10:51,178 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 21:10:51,178 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 21:10:51,179 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:10:48" (3/4) ... [2022-07-19 21:10:51,181 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-19 21:10:51,185 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2022-07-19 21:10:51,185 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2022-07-19 21:10:51,185 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2022-07-19 21:10:51,188 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2022-07-19 21:10:51,188 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-19 21:10:51,188 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-19 21:10:51,188 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-19 21:10:51,207 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 21:10:51,207 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 21:10:51,207 INFO L158 Benchmark]: Toolchain (without parser) took 3616.57ms. Allocated memory was 104.9MB in the beginning and 174.1MB in the end (delta: 69.2MB). Free memory was 69.7MB in the beginning and 67.4MB in the end (delta: 2.3MB). Peak memory consumption was 70.0MB. Max. memory is 16.1GB. [2022-07-19 21:10:51,208 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 79.7MB. Free memory is still 43.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 21:10:51,208 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.45ms. Allocated memory is still 104.9MB. Free memory was 69.5MB in the beginning and 71.1MB in the end (delta: -1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 21:10:51,208 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.66ms. Allocated memory is still 104.9MB. Free memory was 71.1MB in the beginning and 69.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:10:51,208 INFO L158 Benchmark]: Boogie Preprocessor took 17.93ms. Allocated memory is still 104.9MB. Free memory was 69.1MB in the beginning and 67.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:10:51,209 INFO L158 Benchmark]: RCFGBuilder took 306.26ms. Allocated memory is still 104.9MB. Free memory was 67.5MB in the beginning and 55.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-19 21:10:51,209 INFO L158 Benchmark]: TraceAbstraction took 2898.90ms. Allocated memory was 104.9MB in the beginning and 174.1MB in the end (delta: 69.2MB). Free memory was 54.9MB in the beginning and 70.6MB in the end (delta: -15.6MB). Peak memory consumption was 55.6MB. Max. memory is 16.1GB. [2022-07-19 21:10:51,209 INFO L158 Benchmark]: Witness Printer took 28.81ms. Allocated memory is still 174.1MB. Free memory was 70.6MB in the beginning and 67.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:10:51,210 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 79.7MB. Free memory is still 43.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.45ms. Allocated memory is still 104.9MB. Free memory was 69.5MB in the beginning and 71.1MB in the end (delta: -1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.66ms. Allocated memory is still 104.9MB. Free memory was 71.1MB in the beginning and 69.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.93ms. Allocated memory is still 104.9MB. Free memory was 69.1MB in the beginning and 67.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 306.26ms. Allocated memory is still 104.9MB. Free memory was 67.5MB in the beginning and 55.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2898.90ms. Allocated memory was 104.9MB in the beginning and 174.1MB in the end (delta: 69.2MB). Free memory was 54.9MB in the beginning and 70.6MB in the end (delta: -15.6MB). Peak memory consumption was 55.6MB. Max. memory is 16.1GB. * Witness Printer took 28.81ms. Allocated memory is still 174.1MB. Free memory was 70.6MB in the beginning and 67.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 115 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.8s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 317 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 317 mSDsluCounter, 501 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 498 mSDsCounter, 73 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 610 IncrementalHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 73 mSolverCounterUnsat, 129 mSDtfsCounter, 610 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=391occurred in iteration=2, InterpolantAutomatonStates: 95, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 614 NumberOfCodeBlocks, 614 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 604 ConstructedInterpolants, 0 QuantifiedInterpolants, 2318 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-19 21:10:51,235 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE